CN106533616B - A kind of reliable data transmission method - Google Patents
A kind of reliable data transmission method Download PDFInfo
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- CN106533616B CN106533616B CN201610935433.5A CN201610935433A CN106533616B CN 106533616 B CN106533616 B CN 106533616B CN 201610935433 A CN201610935433 A CN 201610935433A CN 106533616 B CN106533616 B CN 106533616B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a kind of reliable data transmission method, the first communication node is that the second communication node distribution first sends resource and the second transmission resource；The generation of second communication node includes cyclic redundancy check information, the data to be transmitted bit block that length is Y；Second communication node has three kinds of candidate's demodulated reference signal transmissions patterns, first communication node receives the demodulated reference signal in the first transmission resource, the transmission mode of demodulated reference signal is determined, if the first communication node is successfully decoded in the first transmission resource, flow terminates；If the first communication node is decoded not successfully in the first transmission resource, then the first communication node determines whether there is redundant data bits block in the second transmission resource, if so, then whether the first communication node is attempted to be successfully decoded using the redundant data bits block received and the data to be transmitted bit block received.The method of the present invention can be effectively increased the robustness of data transfer to adapt to the business demand of the 5th generation wireless communication system.
Description
Technical field
The present invention relates to the transmission side data in moving communicating field, more particularly to a kind of 5th generation wireless communication system
Method.
Background technology
Rise and abundant, data user's number in wireless communication system of wireless data application business with intelligent terminal
It is significantly increased, data content is no longer confined to traditional word or image, and future customer is to high definition video, mobile TV etc.
The demand of multimedia service is more and more, causes wireless network traffic to show the situation of explosive growth.According to market institution
Prediction, coming 10 years, wireless data service will increase by 500 ~ 1000 times, increase by 1.6 ~ 2 times every year on average, this is to radio communication system
The network capacity of system proposes higher requirement.
Towards the year two thousand twenty and future, mobile Internet and internet of things service are by the main driving as Mobile Communication Development
Power.5G will meet people living, work, the diversified business demand in leisure and the various regions such as traffic, even if it is intensive live
Quarter, office, stadium, outdoor rally, subway, through street, high ferro and wide area covering etc. have ultra high flux density, superelevation
Connect number density, the scene of ultrahigh-mobility feature, or user provide ultra high-definition video, virtual reality, augmented reality,
The ultimate attainment business experience such as cloud desktop, game on line.At the same time, 5G will also penetrate into Internet of Things and various industries field, with work
Industry facility, Medical Instruments, the fusion of vehicles even depth, effectively meet the diversified industry of the vertical industries such as industry, medical treatment, traffic
Business demand, is realized really " all things on earth interconnection ".
5G will solve the challenge that differentiation performance indications are brought under diversified application scenarios, the property that different application scene faces
It can challenge different, Consumer's Experience speed, flux density, time delay, efficiency and connection number are all likely to become choosing for different scenes
War property index.From mobile Internet and the main application scenarios of Internet of Things, business demand and challenge, continuous wide area can be summarized
Covering, focus high power capacity, the big connection of low-power consumption and the highly reliable four 5G major technique scenes of low time delay.
For the highly reliable technology scene of low time delay, it is necessary to improve the success rate that data head is passed as far as possible, but current
Transmission mechanism is designed with the success rate of first biography 90%, it is impossible to meet the design requirement of future broadband wireless communication systems.
The content of the invention
It is an object of the invention to overcome the problems such as data transmission credibility present in the 5th generation wireless communication system is poor,
A kind of reliable data transmission method is provided.
For up to above-mentioned purpose, the present invention is achieved through the following technical solutions：
A kind of reliable data transmission method, comprises the following steps：1）First communication node distributes for the second communication node
First, which sends resource and second, sends resource, wherein the first transmission resource is that second communication node occupies alone,
The second transmission resource is that second communication node and other second communication nodes are shared, and described second sends resource
Subcarrier in frequency domain number is less than the described first subcarrier in frequency domain number for sending resource, and described second sends the time domain length of resource
The time domain length of resource is sent more than described first, the second transmission resource is to connect in time domain with the described first transmission resource
Continuous, described second, which sends resource, is located at after the described first transmission resource；2）The second communication node generation length is Y's
Data to be transmitted bit block, extracts X bit generation redundant data bits block from the data to be transmitted bit block, wherein, X
It is positive integer with Y, X, which is less than in Y, the data to be transmitted bit block, includes cyclic redundancy check information；3）Second communication
Node has three kinds of candidate's demodulated reference signal transmissions patterns, is referred to as the first demodulated reference signal transmissions pattern, the second demodulation
Reference signal transmission pattern, the 3rd demodulated reference signal transmissions pattern, if second communication node is determined only using described
First, which sends resource, sends the data to be transmitted bit block, then second communication node is believed using first demodulation reference
Number transmission mode sends the demodulated reference signal for demodulating the data to be transmitted bit block, and sends resource described first
It is upper to send the demodulated reference signal and the data to be transmitted bit block；If second communication node is determined using described
First, which sends resource, sends the data to be transmitted bit block, and using the described second transmission resource by spread spectrum, single prelist
Code mode sends the redundant data bits block, then second communication node uses the second demodulated reference signal transmissions mould
Formula sends the demodulated reference signal for demodulating the data to be transmitted bit block, and sends institute in the described first transmission resource
Demodulated reference signal and the data to be transmitted bit block are stated, is sent described second in resource by spread spectrum, single precoding
Mode transmits the redundant data bits block；If second communication node determines that sending resource using described first sends institute
Data to be transmitted bit block is stated, and the redundant data ratio is sent by open-loop precoding mode using the described second transmission resource
Special block, then second communication node using the 3rd demodulated reference signal transmissions pattern send for demodulate it is described to be transmitted
The demodulated reference signal of data bit block, and described first transmission resource on send the demodulated reference signal with it is described to be passed
Transmission of data bit block, the redundant data bits are transmitted in the described second transmission resource by spread spectrum, open-loop precoding mode
Block；4）First communication node receives the demodulated reference signal in the first transmission resource, determines the demodulation reference letter
Number transmission mode, if first communication node first transmission resource on the data to be transmitted bit is successfully decoded
Block, then flow terminate；If first communication node decodes the data to be transmitted ratio not successfully in the first transmission resource
Special block, then first communication node determine whether to there is second communication node to send in the second transmission resource it is described
Redundant data bits block, if so, then first communication node utilizes the redundant data bits block and reception received
To the data to be transmitted bit block attempt the data to be transmitted bit block whether can be successfully decoded, flow terminates, if
No, then flow terminates.
Further, the demodulated reference signal transmissions pattern at least includes one below or its combination：Reference signal makes
Sequence, the running time-frequency resource that reference signal is used, the pattern of reference signal.
Further, if second communication node forward direction described in the first communication node send data procedures in not
Generation data are retransmitted, then second communication node is sent for demodulating institute using the first demodulated reference signal transmissions pattern
State the demodulated reference signal of data to be transmitted bit block, and send in the described first transmission resource the demodulated reference signal with
The data to be transmitted bit block.
Further, if second communication node forward direction described in the first communication node send data procedures in send out
Raw data are retransmitted, and the measuring reference signals that second communication node is sent according to first communication node measure channel
Correlation time is more than 0.5ms, then second communication node is sent using the second demodulated reference signal transmissions pattern and is used for
The demodulated reference signal of the data to be transmitted bit block is demodulated, and the demodulation reference is sent in the described first transmission resource
Signal and the data to be transmitted bit block, institute is transmitted in the described second transmission resource by spread spectrum, single precoding mode
State redundant data bits block.
Further, if second communication node forward direction described in the first communication node send data procedures in send out
Raw data are retransmitted, and the measuring reference signals that second communication node is sent according to first communication node measure channel
Correlation time is less than or equal to 0.5ms, then second communication node is sent using the 3rd demodulated reference signal transmissions pattern
Demodulated reference signal for demodulating the data to be transmitted bit block, and send the demodulation in the described first transmission resource
Reference signal and the data to be transmitted bit block, are passed in the described second transmission resource by spread spectrum, open-loop precoding mode
The defeated redundant data bits block.
Further, if second communication node is believed by measuring the measurement reference that first communication node is sent
Number obtained Signal to Interference plus Noise Ratio is less than 20dB, and the measurement reference that second communication node is sent according to first communication node
The correlation time that signal measures channel is more than 0.5ms, then second communication node is passed using the 3rd demodulated reference signal
Defeated pattern sends the demodulated reference signal for demodulating the data to be transmitted bit block, and sends hair in resource described first
Send the demodulated reference signal and the data to be transmitted bit block, described second send resource on by spread spectrum, it is single pre-
Coded system transmits the redundant data bits block.
Further, if second communication node is believed by measuring the measurement reference that first communication node is sent
Number obtained Signal to Interference plus Noise Ratio is less than 20dB, and the measurement reference that second communication node is sent according to first communication node
The correlation time that signal measures channel is less than or equal to 0.5ms, then second communication node is believed using the 3rd demodulation reference
Number transmission mode sends the demodulated reference signal for demodulating the data to be transmitted bit block, and sends resource described first
It is upper to send the demodulated reference signal and the data to be transmitted bit block, sent described second in resource by spreading, opening
Ring precoding mode transmits the redundant data bits block.
Further, the frequency expansion sequence that second communication node is used is that first communication node is logical by signaling
Know, if total subcarrier number that the second transmission resource is included is more than 256, frequency expansion sequence is pseudo-random sequence, such as
Total subcarrier number that really described second transmission resource is included is less than or equal to 256, then frequency expansion sequence is walsh sequence.
Further, transmission power ratio of second communication node on the described second each subcarrier for sending resource
Described first sends big more than the 3dB of transmit power on each subcarrier in resource, or big log2（Second sends resource
Total number of sub-carriers/first sends the total number of sub-carriers of resource）More than dB.
Further, the single precoding mode refers to that second communication node sends the every of resource described second
Carried out data transmission on individual subcarrier using identical pre-coding matrix.
Further, the open-loop precoding mode refers to second communication node in the described second son for sending resource
Predefined one group of pre-coding matrix is used alternatingly on carrier wave to carry out data transmission.
Further, the transmission mode of predefined one group of pre-coding matrix and the demodulated reference signal, which exists, reflects
Penetrate relation.
Further, second communication node is sent in resource described in transmission using wave beam BF-A is sent described first
Data to be transmitted bit block, the redundant data bits block is sent using transmission wave beam BF-B in the described second transmission resource,
The beam angle for sending wave beam BF-A is less than the transmission wave beam BF-B.
The beneficial effects of the invention are as follows：The invention provides a kind of reliable data transmission method, including the first communication section
Point sends resource and second for the second communication node distribution first and sends resource；The generation of second communication node includes cyclic redundancy school
Test the data to be transmitted bit block that information, length are Y；Second communication node has three kinds of candidate's demodulated reference signal transmissions patterns,
First communication node receives the demodulated reference signal in the first transmission resource, determines the transmission mould of the demodulated reference signal
Formula, if the data to be transmitted bit block, flow knot is successfully decoded in the first transmission resource in first communication node
Beam；If first communication node decodes the data to be transmitted bit block, first not successfully in the first transmission resource
Communication node determines whether there is redundant data bits block in the second transmission resource, if so, then first communication node is utilized
It is described to be transmitted whether the redundant data bits block received and the data to be transmitted bit block trial received can be successfully decoded
Data bit block, flow terminates.Using the method for the invention and device（System）, compared with prior art, can be effectively increased
The robustness of data transfer is to adapt to the business demand of the 5th generation wireless communication system.
Brief description of the drawings
Fig. 1 is the flow chart of the data transmission method of the present invention；
Fig. 2 is to send resource location schematic diagram；
Fig. 3 is pilot tone pattern schematic diagram.
Specific embodiment
The present invention is described in further detail below by embodiment combination accompanying drawing.
As shown in Figure 1, method flow of the invention is as follows：
Step 102, the first communication node sends resource and second to the second communication node distribution first and sends resource, wherein
The first transmission resource is that second communication node occupies alone, and the second transmission resource is second communication section
What point and other second communication nodes were shared, the described second subcarrier in frequency domain number for sending resource is less than described first and sends money
The subcarrier in frequency domain number in source, the described second time domain length for sending resource is more than the described first time domain length for sending resource,
The second transmission resource is continuous in time domain with the described first transmission resource, and described second sends resource positioned at described the
After one transmission resource；
Step 104, the data to be transmitted bit block that the second communication node generation length is Y, from the number to be transmitted
Redundant data bits block is generated according to X bit is extracted in bit block, wherein, X and Y are positive integer, and X is less than Y, the number to be transmitted
According in bit block include cyclic redundancy check information；
Step 106, second communication node has three kinds of candidate's demodulated reference signal transmissions patterns, is referred to as the first solution
Adjust reference signal transmission pattern, the second demodulated reference signal transmissions pattern, the 3rd demodulated reference signal transmissions pattern, if described
Second communication node determines that only sending resource using described first sends the data to be transmitted bit block, then second communication
The demodulation that node is sent for demodulating the data to be transmitted bit block using the first demodulated reference signal transmissions pattern is joined
Signal is examined, and the demodulated reference signal and the data to be transmitted bit block are sent in the described first transmission resource；If
Second communication node determines that sending resource using described first sends the data to be transmitted bit block, and uses described the
Two transmission resources send the redundant data bits block by spread spectrum, single precoding mode, then second communication node makes
The demodulated reference signal for demodulating the data to be transmitted bit block is sent with the second demodulated reference signal transmissions pattern,
And the demodulated reference signal and the data to be transmitted bit block are sent in the described first transmission resource, in the described second hair
Send in resource by spread spectrum, single precoding mode transmit the redundant data bits block；If second communication node is true
Surely send resource using described first and send the data to be transmitted bit block, and resource is sent using described second and pass through open loop
Precoding mode sends the redundant data bits block, then second communication node is passed using the 3rd demodulated reference signal
Defeated pattern sends the demodulated reference signal for demodulating the data to be transmitted bit block, and sends hair in resource described first
The demodulated reference signal and the data to be transmitted bit block are sent, sends pre- by spread spectrum, open loop in resource described second
Coded system transmits the redundant data bits block；
Step 108, first communication node receives the demodulated reference signal in the first transmission resource, it is determined that described
The transmission mode of demodulated reference signal, if first communication node first transmission resource on be successfully decoded it is described to be transmitted
Data bit block, then flow terminate；If first communication node decodes described to be passed not successfully in the first transmission resource
Transmission of data bit block, then first communication node determine whether there is second communication node to send out in the second transmission resource
The redundant data bits block sent, if so, then first communication node utilizes the redundant data bits received
Block and the data to be transmitted bit block received attempt the data to be transmitted bit block, flow knot whether can be successfully decoded
Beam, if not provided, flow terminates.
Embodiment 1
Base station sends resource and second to terminal A distribution first and sends resource, wherein the first transmission resource is terminal
Occupy alone, the second transmission resource is that terminal A and other terminals are shared.Preferably, as shown in Figure 2, described
The two subcarrier in frequency domain numbers for sending resource are less than the described first subcarrier in frequency domain number for sending resource, and described second sends money
The time domain length in source is more than the described first time domain length for sending resource, and described second sends resource sends resource with described first
It is continuous in time domain, described second, which sends resource, is located at after the described first transmission resource.
The data to be transmitted bit block that terminal A generation length is 100, takes out from the data to be transmitted bit block equal intervals
25 bits are taken to generate the cyclic redundancy check information for including 4 bits in redundant data bits block, the data to be transmitted bit block.
Terminal A has three kinds of candidate's demodulated reference signal transmissions patterns, is referred to as the first demodulated reference signal transmissions pattern,
Second demodulated reference signal transmissions pattern, the 3rd demodulated reference signal transmissions pattern.Preferably, the demodulated reference signal transmissions
Pattern at least includes one below or its combination：The sequence that reference signal is used, the running time-frequency resource that reference signal is used, with reference to letter
Number pattern（As shown in Figure 3）.
If terminal A determines that only sending resource using described first sends the data to be transmitted bit block, terminal A makes
The demodulated reference signal for demodulating the data to be transmitted bit block is sent with the first demodulated reference signal transmissions pattern,
And send the demodulated reference signal and the data to be transmitted bit block in the described first transmission resource.
If terminal A determines that sending resource using described first sends the data to be transmitted bit block, and using described
Second transmission resource sends the redundant data bits block by spread spectrum, single precoding mode, then terminal A uses described second
Demodulated reference signal transmissions pattern sends the demodulated reference signal for demodulating the data to be transmitted bit block, and described
The demodulated reference signal and the data to be transmitted bit block are sent in one transmission resource, sends and leads in resource described second
Cross spread spectrum, single precoding mode and transmit the redundant data bits block.
If terminal A determines that sending resource using described first sends the data to be transmitted bit block, and using described
Second transmission resource sends the redundant data bits block by open-loop precoding mode, then terminal A uses the described 3rd demodulation
Reference signal transmission pattern sends the demodulated reference signal for demodulating the data to be transmitted bit block, and in the described first hair
Send and the demodulated reference signal and the data to be transmitted bit block are sent in resource, sent described second in resource by expanding
Frequently, open-loop precoding mode transmits the redundant data bits block.
Base station receives the demodulated reference signal in the first transmission resource, determines the transmission mould of the demodulated reference signal
Formula, if the data to be transmitted bit block is successfully decoded in the first transmission resource in base station, flow terminates；If base station exists
The data to be transmitted bit block is decoded not successfully in first transmission resource, then the transmission that base station passes through the demodulated reference signal
Pattern determines the redundant data bits block for whether having terminal A to send in the second transmission resource, if so, then base station profit
Attempt whether to be successfully decoded with the redundant data bits block received and the data to be transmitted bit block received
The data to be transmitted bit block, flow terminates, if not provided, flow terminates.
Embodiment 2
Base station sends resource and second to terminal A distribution first and sends resource, wherein the first transmission resource is terminal
Occupy alone, the second transmission resource is that terminal A and other terminals are shared.Preferably, as shown in Figure 2, described
The two subcarrier in frequency domain numbers for sending resource are less than the described first subcarrier in frequency domain number for sending resource, and described second sends money
The time domain length in source is more than the described first time domain length for sending resource, and described second sends resource sends resource with described first
It is continuous in time domain, described second, which sends resource, is located at after the described first transmission resource.
The data to be transmitted bit block that terminal A generation length is 100, takes out from the data to be transmitted bit block equal intervals
25 bits are taken to generate the cyclic redundancy check information for including 4 bits in redundant data bits block, the data to be transmitted bit block.
Terminal A has three kinds of candidate's demodulated reference signal transmissions patterns, is referred to as the first demodulated reference signal transmissions pattern,
Second demodulated reference signal transmissions pattern, the 3rd demodulated reference signal transmissions pattern.Preferably, the demodulated reference signal transmissions
Pattern at least includes one below or its combination：The sequence that reference signal is used, the running time-frequency resource that reference signal is used, with reference to letter
Number pattern.
If terminal A forward direction base station send data procedures in do not occur data re-transmission, terminal A uses described first
Demodulated reference signal transmissions pattern sends the demodulated reference signal for demodulating the data to be transmitted bit block, and described
The demodulated reference signal and the data to be transmitted bit block are sent in one transmission resource.
Base station receives the demodulated reference signal in the first transmission resource, determines the transmission mould of the demodulated reference signal
The data to be transmitted bit block is successfully decoded in the first transmission resource in formula, base station, then flow terminates.
Embodiment 3
Base station sends resource and second to terminal A distribution first and sends resource, wherein the first transmission resource is terminal
Occupy alone, the second transmission resource is that terminal A and other terminals are shared.Preferably, as shown in Figure 2, described
The two subcarrier in frequency domain numbers for sending resource are less than the described first subcarrier in frequency domain number for sending resource, and described second sends money
The time domain length in source is more than the described first time domain length for sending resource, and described second sends resource sends resource with described first
It is continuous in time domain, described second, which sends resource, is located at after the described first transmission resource.
The data to be transmitted bit block that terminal A generation length is 100, takes out from the data to be transmitted bit block equal intervals
25 bits are taken to generate the cyclic redundancy check information for including 4 bits in redundant data bits block, the data to be transmitted bit block.
Terminal A has three kinds of candidate's demodulated reference signal transmissions patterns, is referred to as the first demodulated reference signal transmissions pattern,
Second demodulated reference signal transmissions pattern, the 3rd demodulated reference signal transmissions pattern.Preferably, the demodulated reference signal transmissions
Pattern at least includes one below or its combination：The sequence that reference signal is used, the running time-frequency resource that reference signal is used, with reference to letter
Number pattern.
If terminal A forward direction base station send in data procedures and occur data and retransmit, and terminal A is sent according to base station
The correlation time that measuring reference signals measure channel is more than 0.5ms, then terminal A uses the second demodulated reference signal transmissions mould
Formula sends the demodulated reference signal for demodulating the data to be transmitted bit block, and sends institute in the described first transmission resource
Demodulated reference signal and the data to be transmitted bit block are stated, is sent described second in resource by spread spectrum, single precoding
Mode transmits the redundant data bits block.Preferably, the single precoding mode refers to second communication node in institute
Carried out data transmission on each subcarrier for stating the second transmission resource using identical pre-coding matrix.
Base station receives the demodulated reference signal in the first transmission resource, determines the transmission mould of the demodulated reference signal
Formula, if the data to be transmitted bit block is successfully decoded in the first transmission resource in base station, flow terminates；If base station exists
The data to be transmitted bit block is decoded not successfully in first transmission resource, then the transmission that base station passes through the demodulated reference signal
Pattern determines the redundant data bits block for having terminal A to send in the second transmission resource, then base station utilizes what is received
It is described to be transmitted whether the redundant data bits block and the data to be transmitted bit block trial received can be successfully decoded
Data bit block, flow terminates.
Embodiment 4
Base station sends resource and second to terminal A distribution first and sends resource, wherein the first transmission resource is terminal
Occupy alone, the second transmission resource is that terminal A and other terminals are shared.Preferably, as shown in Figure 2, described
The two subcarrier in frequency domain numbers for sending resource are less than the described first subcarrier in frequency domain number for sending resource, and described second sends money
The time domain length in source is more than the described first time domain length for sending resource, and described second sends resource sends resource with described first
It is continuous in time domain, described second, which sends resource, is located at after the described first transmission resource.
The data to be transmitted bit block that terminal A generation length is 100, takes out from the data to be transmitted bit block equal intervals
25 bits are taken to generate the cyclic redundancy check information for including 4 bits in redundant data bits block, the data to be transmitted bit block.
Terminal A has three kinds of candidate's demodulated reference signal transmissions patterns, is referred to as the first demodulated reference signal transmissions pattern,
Second demodulated reference signal transmissions pattern, the 3rd demodulated reference signal transmissions pattern.Preferably, the demodulated reference signal transmissions
Pattern at least includes one below or its combination：The sequence that reference signal is used, the running time-frequency resource that reference signal is used, with reference to letter
Number pattern.
If terminal A forward direction base station send data procedures in occur data retransmit（For example with 5 transmissions before statistics
Whether occurred to retransmit during data as judgment basis）, and the measuring reference signals that terminal A is sent according to base station measure
The correlation time of channel is less than or equal to 0.5ms, then terminal A is sent for solving using the 3rd demodulated reference signal transmissions pattern
The demodulated reference signal of the data to be transmitted bit block is adjusted, and the demodulation reference is sent in the described first transmission resource and is believed
Number with the data to be transmitted bit block, transmitted in the described second transmission resource by spread spectrum, open-loop precoding mode described
Redundant data bits block.Preferably, the open-loop precoding mode refers to terminal A on the described second subcarrier for sending resource
Predefined one group of pre-coding matrix is used alternatingly to carry out data transmission, predefined one group of pre-coding matrix with it is described
There are mapping relations in the sequence that demodulated reference signal is used, for example, sequence A correspondence pre-coding matrix group A, sequence B correspondence prelists
Code matrix group B.
Base station receives the demodulated reference signal in the first transmission resource, determines the transmission mould of the demodulated reference signal
Formula, if the data to be transmitted bit block is successfully decoded in the first transmission resource in base station, flow terminates；If base station exists
The data to be transmitted bit block is decoded not successfully in first transmission resource, then the transmission that base station passes through the demodulated reference signal
Pattern determines the redundant data bits block for having terminal A to send in the second transmission resource, then base station utilizes what is received
It is described to be transmitted whether the redundant data bits block and the data to be transmitted bit block trial received can be successfully decoded
Data bit block, flow terminates.
Embodiment 5
Base station sends resource and second to terminal A distribution first and sends resource, wherein the first transmission resource is terminal
Occupy alone, the second transmission resource is that terminal A and other terminals are shared.Preferably, as shown in Figure 2, described
The two subcarrier in frequency domain numbers for sending resource are less than the described first subcarrier in frequency domain number for sending resource, and described second sends money
The time domain length in source is more than the described first time domain length for sending resource, and described second sends resource sends resource with described first
It is continuous in time domain, described second, which sends resource, is located at after the described first transmission resource.
The data to be transmitted bit block that terminal A generation length is 100, takes out from the data to be transmitted bit block equal intervals
25 bits are taken to generate the cyclic redundancy check information for including 4 bits in redundant data bits block, the data to be transmitted bit block.
Terminal A has three kinds of candidate's demodulated reference signal transmissions patterns, is referred to as the first demodulated reference signal transmissions pattern,
Second demodulated reference signal transmissions pattern, the 3rd demodulated reference signal transmissions pattern.Preferably, the demodulated reference signal transmissions
Pattern at least includes one below or its combination：The sequence that reference signal is used, the running time-frequency resource that reference signal is used, with reference to letter
Number pattern.
If terminal A is less than by measuring the Signal to Interference plus Noise Ratio that the measuring reference signals that first communication node is sent are obtained
20dB, and the measuring reference signals that are sent according to first communication node of second communication node are when measuring the correlation of channel
Between be more than 0.5ms, then terminal A is sent for demodulating the data to be transmitted using the second demodulated reference signal transmissions pattern
The demodulated reference signal of bit block, and send the demodulated reference signal and the number to be transmitted in the described first transmission resource
According to bit block, the redundant data bits block is transmitted by spread spectrum, single precoding mode in the described second transmission resource.It is excellent
Selection of land, the single precoding mode refers to that second communication node makes on each subcarrier of the described second transmission resource
Carried out data transmission with identical pre-coding matrix.
Base station receives the demodulated reference signal in the first transmission resource, determines the transmission mould of the demodulated reference signal
Formula, if the data to be transmitted bit block is successfully decoded in the first transmission resource in base station, flow terminates；If base station exists
The data to be transmitted bit block is decoded not successfully in first transmission resource, then the transmission that base station passes through the demodulated reference signal
Pattern determines the redundant data bits block for having terminal A to send in the second transmission resource, then base station utilizes what is received
It is described to be transmitted whether the redundant data bits block and the data to be transmitted bit block trial received can be successfully decoded
Data bit block, flow terminates.
Embodiment 6
Base station sends resource and second to terminal A distribution first and sends resource, wherein the first transmission resource is terminal
Occupy alone, the second transmission resource is that terminal A and other terminals are shared.Preferably, as shown in Figure 2, described
The two subcarrier in frequency domain numbers for sending resource are less than the described first subcarrier in frequency domain number for sending resource, and described second sends money
The time domain length in source is more than the described first time domain length for sending resource, and described second sends resource sends resource with described first
It is continuous in time domain, described second, which sends resource, is located at after the described first transmission resource.
The data to be transmitted bit block that terminal A generation length is 100, takes out from the data to be transmitted bit block equal intervals
25 bits are taken to generate the cyclic redundancy check information for including 4 bits in redundant data bits block, the data to be transmitted bit block.
Terminal A has three kinds of candidate's demodulated reference signal transmissions patterns, is referred to as the first demodulated reference signal transmissions pattern,
Second demodulated reference signal transmissions pattern, the 3rd demodulated reference signal transmissions pattern.Preferably, the demodulated reference signal transmissions
Pattern at least includes one below or its combination：The sequence that reference signal is used, the running time-frequency resource that reference signal is used, with reference to letter
Number pattern.
If terminal A is less than by measuring the Signal to Interference plus Noise Ratio that the measuring reference signals that first communication node is sent are obtained
20dB, and the measuring reference signals that are sent according to first communication node of second communication node are when measuring the correlation of channel
Between be less than or equal to 0.5ms, then terminal A using the 3rd demodulated reference signal transmissions pattern send for demodulate it is described to be transmitted
The demodulated reference signal of data bit block, and described first transmission resource on send the demodulated reference signal with it is described to be passed
Transmission of data bit block, the redundant data bits are transmitted in the described second transmission resource by spread spectrum, open-loop precoding mode
Block.Preferably, the open-loop precoding mode refer to terminal A described second transmission resource subcarrier on be used alternatingly it is predetermined
One group of pre-coding matrix of justice carries out data transmission, predefined one group of pre-coding matrix and the demodulated reference signal
There is mapping relations, such as sequence A correspondence pre-coding matrix group A, sequence B correspondence pre-coding matrix group B in the sequence used.
Base station receives the demodulated reference signal in the first transmission resource, determines the transmission mould of the demodulated reference signal
Formula, if the data to be transmitted bit block is successfully decoded in the first transmission resource in base station, flow terminates；If base station exists
The data to be transmitted bit block is decoded not successfully in first transmission resource, then the transmission that base station passes through the demodulated reference signal
Pattern determines the redundant data bits block for having terminal A to send in the second transmission resource, then base station utilizes what is received
It is described to be transmitted whether the redundant data bits block and the data to be transmitted bit block trial received can be successfully decoded
Data bit block, flow terminates.
Embodiment 7
Base station sends resource and second to terminal A distribution first and sends resource, wherein the first transmission resource is terminal
Occupy alone, the second transmission resource is that terminal A and other terminals are shared.Preferably, as shown in Figure 2, described
The two subcarrier in frequency domain numbers for sending resource are less than the described first subcarrier in frequency domain number for sending resource, and described second sends money
The time domain length in source is more than the described first time domain length for sending resource, and described second sends resource sends resource with described first
It is continuous in time domain, described second, which sends resource, is located at after the described first transmission resource.
The data to be transmitted bit block that terminal A generation length is 100, takes out from the data to be transmitted bit block equal intervals
25 bits are taken to generate the cyclic redundancy check information for including 4 bits in redundant data bits block, the data to be transmitted bit block.
Terminal A has three kinds of candidate's demodulated reference signal transmissions patterns, is referred to as the first demodulated reference signal transmissions pattern,
Second demodulated reference signal transmissions pattern, the 3rd demodulated reference signal transmissions pattern.Preferably, the demodulated reference signal transmissions
Pattern at least includes one below or its combination：The sequence that reference signal is used, the running time-frequency resource that reference signal is used, with reference to letter
Number pattern.
If terminal A determines that only sending resource using described first sends the data to be transmitted bit block, terminal A makes
The demodulated reference signal for demodulating the data to be transmitted bit block is sent with the first demodulated reference signal transmissions pattern,
And send the demodulated reference signal and the data to be transmitted bit block in the described first transmission resource.
If terminal A determines that sending resource using described first sends the data to be transmitted bit block, and using described
Second transmission resource sends the redundant data bits block by spread spectrum, single precoding mode, then terminal A uses described second
Demodulated reference signal transmissions pattern sends the demodulated reference signal for demodulating the data to be transmitted bit block, and described
The demodulated reference signal and the data to be transmitted bit block are sent in one transmission resource, sends and leads in resource described second
Cross spread spectrum, single precoding mode and transmit the redundant data bits block.Preferably, the frequency expansion sequence that terminal A is used is base station
By what is signaled, if total subcarrier number that the second transmission resource is included is more than 256, frequency expansion sequence is puppet
Random sequence, if total subcarrier number that the second transmission resource is included is less than or equal to 256, frequency expansion sequence is Wal
Assorted sequence.Preferably, the first transmission money described in transmission power ratio of the terminal A on the described second each subcarrier for sending resource
Big more than the 3dB of transmit power on each subcarrier on source, or big log2（Second sends total number of sub-carriers/the of resource
One sends the total number of sub-carriers of resource）More than dB.
If terminal A determines that sending resource using described first sends the data to be transmitted bit block, and using described
Second transmission resource sends the redundant data bits block by open-loop precoding mode, then terminal A uses the described 3rd demodulation
Reference signal transmission pattern sends the demodulated reference signal for demodulating the data to be transmitted bit block, and in the described first hair
Send and the demodulated reference signal and the data to be transmitted bit block are sent in resource, sent described second in resource by expanding
Frequently, open-loop precoding mode transmits the redundant data bits block.Preferably, the frequency expansion sequence that terminal A is used is that base station passes through
Signal, if total subcarrier number that the second transmission resource is included is more than 256, frequency expansion sequence is pseudorandom
Sequence, if total subcarrier number that the second transmission resource is included is less than or equal to 256, frequency expansion sequence is Walsh sequence
Row.Preferably, in the first transmission resource described in transmission power ratio of the terminal A on the described second each subcarrier for sending resource
Each subcarrier on big more than the 3dB of transmit power, or big log2（Second total number of sub-carriers/first for sending resource sends out
Send the total number of sub-carriers of resource）More than dB.
Base station receives the demodulated reference signal in the first transmission resource, determines the transmission mould of the demodulated reference signal
Formula, if the data to be transmitted bit block is successfully decoded in the first transmission resource in base station, flow terminates；If base station exists
The data to be transmitted bit block is decoded not successfully in first transmission resource, then the transmission that base station passes through the demodulated reference signal
Pattern determines the redundant data bits block for whether having terminal A to send in the second transmission resource, if so, then base station profit
Attempt whether to be successfully decoded with the redundant data bits block received and the data to be transmitted bit block received
The data to be transmitted bit block, flow terminates, if not provided, flow terminates.
Embodiment 8
Base station sends resource and second to terminal A distribution first and sends resource, wherein the first transmission resource is terminal
Occupy alone, the second transmission resource is that terminal A and other terminals are shared.Preferably, as shown in Figure 2, described
The two subcarrier in frequency domain numbers for sending resource are less than the described first subcarrier in frequency domain number for sending resource, and described second sends money
The time domain length in source is more than the described first time domain length for sending resource, and described second sends resource sends resource with described first
It is continuous in time domain, described second, which sends resource, is located at after the described first transmission resource.
The data to be transmitted bit block that terminal A generation length is 100, takes out from the data to be transmitted bit block equal intervals
25 bits are taken to generate the cyclic redundancy check information for including 4 bits in redundant data bits block, the data to be transmitted bit block.
Terminal A has three kinds of candidate's demodulated reference signal transmissions patterns, is referred to as the first demodulated reference signal transmissions pattern,
Second demodulated reference signal transmissions pattern, the 3rd demodulated reference signal transmissions pattern.Preferably, the demodulated reference signal transmissions
Pattern at least includes one below or its combination：The sequence that reference signal is used, the running time-frequency resource that reference signal is used, with reference to letter
Number pattern（As shown in Figure 3）.
If terminal A determines that only sending resource using described first sends the data to be transmitted bit block, terminal A makes
The demodulated reference signal for demodulating the data to be transmitted bit block is sent with the first demodulated reference signal transmissions pattern,
And send the demodulated reference signal and the data to be transmitted ratio by sending wave beam BF-A in the described first transmission resource
Special block.
If terminal A determines that sending resource using described first sends the data to be transmitted bit block, and using described
Second transmission resource sends the redundant data bits block by spread spectrum, single precoding mode, then terminal A uses described second
Demodulated reference signal transmissions pattern sends the demodulated reference signal for demodulating the data to be transmitted bit block, and described
The demodulated reference signal and the data to be transmitted bit block are sent in one transmission resource, is made in the described second transmission resource
The redundant data bits block is transmitted by spread spectrum, single precoding mode with transmission wave beam BF-B.
If terminal A determines that sending resource using described first sends the data to be transmitted bit block, and using described
Second transmission resource sends the redundant data bits block by open-loop precoding mode, then terminal A uses the described 3rd demodulation
Reference signal transmission pattern sends the demodulated reference signal for demodulating the data to be transmitted bit block, and in the described first hair
Send and the demodulated reference signal and the data to be transmitted bit block are sent in resource, sent described second in resource using hair
Wave beam BF-B is sent to transmit the redundant data bits block by spread spectrum, open-loop precoding mode.
Base station determines the demodulation using the demodulated reference signal received in wave beam BF-C receptions the first transmission resource
The transmission mode of reference signal, if the data to be transmitted bit block is successfully decoded in the first transmission resource in base station, flows
Journey terminates；If base station decodes the data to be transmitted bit block not successfully in the first transmission resource, base station passes through described
The transmission mode of demodulated reference signal determines the redundant data bits for whether having terminal A to send in the second transmission resource
Block, if so, then base station is using receiving wave beam BF-D using the redundant data bits block that receives and described in receiving
Data to be transmitted bit block attempts the data to be transmitted bit block whether can be successfully decoded, and flow terminates, if not provided, flow
Terminate.
Preferably, the beam angle for sending wave beam BF-A is less than transmission wave beam BF-B, receives wave beam BF-C beam angle
Less than wave beam BF-D is received, further, the beam coverage for sending wave beam BF-B is covered comprising the wave beam for sending wave beam BF-A
Lid scope, the beam coverage for receiving wave beam BF-D includes the beam coverage for receiving wave beam BF-C.
Test result indicates that, using method of the present invention, by flexibly being provided according to channel circumstance change using distribution
Source carries out redundant data transmissions, can effectively antagonize channel variation situation severe in high-frequency communication, the reliability of data transfer reaches
To more than 99%, data transfer delay is significantly reduced.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (10)
1. a kind of reliable data transmission method, it is characterised in that：It the described method comprises the following steps：
1) the first communication node is that the second communication node distribution first sends resource and the second transmission resource, wherein first hair
It is that second communication node occupies alone to send resource, and the second transmission resource is second communication node and other the
Two communication nodes sharings, the described second subcarrier in frequency domain number for sending resource is less than the described first frequency domain for sending resource
Variable number, the described second time domain length for sending resource is more than the described first time domain length for sending resource, second hair
It is continuous in time domain to send resource to send resource with described first, and described second, which sends resource, is located at the described first transmission resource
Afterwards；
2) the data to be transmitted bit block that the second communication node generation length is Y, from the data to be transmitted bit block
X bit generation redundant data bits block is extracted, wherein, X and Y are positive integer, and X is less than in Y, the data to be transmitted bit block
Include cyclic redundancy check information；
3) second communication node has three kinds of candidate's demodulated reference signal transmissions patterns, is referred to as the first demodulated reference signal
Transmission mode, the second demodulated reference signal transmissions pattern, the 3rd demodulated reference signal transmissions pattern, if second communication section
Point determines that only sending resource using described first sends the data to be transmitted bit block, then second communication node uses institute
State the first demodulated reference signal transmissions pattern and send demodulated reference signal for demodulating the data to be transmitted bit block, and
The demodulated reference signal and the data to be transmitted bit block are sent in the first transmission resource；If second communication
Node determination sends resource using described first and sends the data to be transmitted bit block, and is led to using the described second transmission resource
Cross spread spectrum, single precoding mode and send the redundant data bits block, then second communication node is solved using described second
Reference signal transmission pattern is adjusted to send the demodulated reference signal for demodulating the data to be transmitted bit block, and described first
Send and send the demodulated reference signal and the data to be transmitted bit block in resource, pass through in the described second transmission resource
Spread spectrum, single precoding mode transmit the redundant data bits block；If second communication node is determined using described the
One, which sends resource, sends the data to be transmitted bit block, and passes through spread spectrum, open-loop precoding using the described second transmission resource
Mode sends the redundant data bits block, then second communication node uses the 3rd demodulated reference signal transmissions pattern
The demodulated reference signal for demodulating the data to be transmitted bit block is sent, and is sent described first in resource described in transmission
Demodulated reference signal and the data to be transmitted bit block, send in resource by spread spectrum, open-loop precoding side described second
Formula transmits the redundant data bits block；
4) first communication node receives the demodulated reference signal in the first transmission resource, determines the demodulation reference letter
Number transmission mode, if first communication node first transmission resource on the data to be transmitted bit is successfully decoded
Block, then flow terminate；If first communication node decodes the data to be transmitted ratio not successfully in the first transmission resource
Special block, then first communication node determine whether to there is second communication node to send in the second transmission resource it is described
Redundant data bits block, if so, then first communication node utilizes the redundant data bits block and reception received
To the data to be transmitted bit block attempt the data to be transmitted bit block whether can be successfully decoded, flow terminates, if
No, then flow terminates.
2. data transmission method according to claim 1, it is characterised in that：The demodulated reference signal transmissions pattern is at least
Including one below or its combination：The sequence that reference signal is used, the running time-frequency resource that reference signal is used, the figure of reference signal
Sample.
3. data transmission method according to claim 1, it is characterised in that：If second communication node forward direction
First communication node is sent in data procedures, and data re-transmission does not occur, then second communication node is solved using described first
Reference signal transmission pattern is adjusted to send the demodulated reference signal for demodulating the data to be transmitted bit block, and described first
Send and send the demodulated reference signal and the data to be transmitted bit block in resource.
4. data transmission method according to claim 1, it is characterised in that：If second communication node forward direction
First communication node, which is sent in data procedures, occurs data re-transmission, and second communication node is according to the described first communication
The correlation time that the measuring reference signals that node is sent measure channel is more than 0.5ms, then second communication node uses described
Second demodulated reference signal transmissions pattern sends the demodulated reference signal for demodulating the data to be transmitted bit block, and in institute
State and the demodulated reference signal and the data to be transmitted bit block are sent in the first transmission resource, resource is sent described second
On by spread spectrum, single precoding mode transmit the redundant data bits block.
5. data transmission method according to claim 1, it is characterised in that：If second communication node forward direction
First communication node, which is sent in data procedures, occurs data re-transmission, and second communication node is according to the described first communication
The correlation time that the measuring reference signals that node is sent measure channel is less than or equal to 0.5ms, then second communication node is used
The 3rd demodulated reference signal transmissions pattern sends the demodulated reference signal for demodulating the data to be transmitted bit block, and
The demodulated reference signal and the data to be transmitted bit block are sent in the described first transmission resource, is sent described second
The redundant data bits block is transmitted by spread spectrum, open-loop precoding mode in resource.
6. data transmission method according to claim 1, it is characterised in that：If second communication node passes through measurement
The Signal to Interference plus Noise Ratio that the measuring reference signals that first communication node is sent are obtained is less than 20dB, and the second communication node root
The correlation time that the measuring reference signals sent according to first communication node measure channel is more than 0.5ms, then described second leads to
Letter node sends the demodulation for demodulating the data to be transmitted bit block using the second demodulated reference signal transmissions pattern
Reference signal, and the demodulated reference signal and the data to be transmitted bit block are sent in the described first transmission resource,
The redundant data bits block is transmitted by spread spectrum, single precoding mode in the second transmission resource；If described second
Communication node is less than 20dB, and institute by measuring the Signal to Interference plus Noise Ratio that the measuring reference signals that first communication node is sent are obtained
State the measuring reference signals that the second communication node sends according to first communication node and measure correlation time of channel and be less than etc.
In 0.5ms, then second communication node is sent using the 3rd demodulated reference signal transmissions pattern is used to demodulate described treat
Transmit data bit block demodulated reference signal, and described first transmission resource on send the demodulated reference signal with it is described
Data to be transmitted bit block, the redundant data is transmitted in the described second transmission resource by spread spectrum, open-loop precoding mode
Bit block.
7. data transmission method according to claim 1, it is characterised in that：The spread spectrum sequence that second communication node is used
Row be first communication node by signaling, if total subcarrier number for including of the second transmission resource is more than
256, then frequency expansion sequence is pseudo-random sequence, if total subcarrier number that the second transmission resource is included is less than or equal to
256, then frequency expansion sequence is walsh sequence.
8. data transmission method according to claim 1, it is characterised in that：Second communication node is in the described second hair
Send the described in the transmission power ratio on each subcarrier of resource first transmit power sent on each subcarrier in resource big
More than 3dB, or big log2(the second total number of sub-carriers/first for sending resource sends the total number of sub-carriers of resource) more than dB.
9. data transmission method according to claim 1, it is characterised in that：The single precoding mode refers to described
Two communication nodes are carried out data transmission on each subcarrier of the described second transmission resource using identical pre-coding matrix；Institute
State open-loop precoding mode refer to second communication node described second transmission resource subcarrier on be used alternatingly it is predetermined
One group of pre-coding matrix of justice carries out data transmission；Predefined one group of pre-coding matrix and the demodulated reference signal
There are mapping relations in transmission mode.
10. data transmission method according to claim 1, it is characterised in that：Second communication node uses send wave
Beam BF-A sends the data to be transmitted bit block in the described first transmission resource, using transmission wave beam BF-B described second
Send and the redundant data bits block is sent in resource, the beam angle of the transmission wave beam BF-A is less than the transmission wave beam
BF-B 。
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| CN102480348B (en) * | 2010-11-29 | 2014-10-22 | 中兴通讯股份有限公司 | Data transmission method and communication node |
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