CN106487487B

CN106487487B - A kind of improved data transmission method

Info

Publication number: CN106487487B
Application number: CN201610935423.1A
Authority: CN
Inventors: 王洋
Original assignee: Shenzhen Polytechnic
Current assignee: Shenzhen Polytechnic
Priority date: 2016-11-01
Filing date: 2016-11-01
Publication date: 2017-11-03
Anticipated expiration: 2036-11-01
Also published as: CN106487487A

Abstract

The invention provides a kind of improved data transmission method, including 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, determines the transmission mode of the demodulated reference signal, and feeds back whether receive successful message to the second communication node；Second communication node is received after the reception failure information of the first communication node feedback, generates retransmitted redundant data bit block, and sent in the 3rd transmission resource that the first communication node is its distribution；First communication node will receive data to be transmitted bit block of the retransmitted redundant data bit block with receiving before and be handled.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

A kind of improved data transmission method

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 improved data transmission method is provided.

For up to above-mentioned purpose, the present invention is achieved through the following technical solutions：

A kind of improved data transmission method, comprises the following steps：1）First communication node is distributed to 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 the first communication node feedback reception successful information is to second communication node；If first communication node The data to be transmitted bit block is decoded not successfully in the first transmission resource, then first communication node determines described second The redundant data bits block for whether having second communication node to send in resource is sent, if it is not, described first Communication node feedback reception failure information gives second communication node, if so, then first communication node utilizes reception To all or part redundant data bits block and the data to be transmitted bit block that receives attempt whether to succeed The data to be transmitted bit block is decoded, if the decoding is successful, then the first communication node feedback reception successful information is to institute The second communication node is stated, if decoding failure, the first communication node feedback reception failure information is to the described second communication Node；5）Second communication node is received after the reception failure information of the first communication node feedback, will be described Data to be transmitted bit block is divided into T segment data bit block, then aligns the bit of the T segment data bit block Xor operation is carried out, a retransmitted redundant data bit block is obtained, second communication node is in first communication node The retransmitted redundant data bit block is sent in its 3rd transmission resource distributed, wherein, the described 3rd sends resource in time domain On length be less than described first and send length of the resource in time domain, the described 3rd sends between subcarrier of the resource on frequency domain Every being the described first send subcarrier spacing of the resource on frequency domain 4 times；6）First communication node receives the re-transmission After redundant data bits block, the retransmitted redundant data bit block and the data to be transmitted bit block received before are carried out After processing, judge whether that the data to be transmitted bit block can be properly received.

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 retransmitted redundant data bit block is sent in the described 3rd transmission resource using transmission wave beam BF-C, wherein, it is described to send Wave beam BF-A beam angle is less than the beam angle of the transmission wave beam BF-B, and the beam angle of the transmission wave beam BF-B is small In the beam angle of the transmission wave beam BF-C.

Further, if first communication node sends reception failure in resource first, and described second is determined Communication node does not send the redundant data bits block, and first communication node is at the time of described first sends after resource The reception failure information is fed back, if first communication node sends reception failure in resource first, and is determined described Second communication node sends the redundant data bits block, first communication node receive described second send resource the first two After the partial bit of the redundant data bits block of/mono- time domain transmitted over resources, with receive before it is described to be transmitted Data bit block is merged, and judgement is received successfully or reception failure, and then feedback reception is successfully or reception failure information is given Second communication node.

The beneficial effects of the invention are as follows：The invention provides a kind of improved 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, and feed back whether receive successful message to the second communication node；Second communication node receives the first communication node feedback Reception failure information after, generate retransmitted redundant data bit block, and the first communication node for its distribution the 3rd send money Sent on source；First communication node carries out the data to be transmitted bit block for receiving retransmitted redundant data bit block and receiving before Processing.Using the method for the invention and device（System）, compared with prior art, the robustness of data transfer can be effectively increased 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；

Fig. 4 is that feedback information sends 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 the first communication node feedback reception successful information is to second communication node；If described first Communication node decodes the data to be transmitted bit block not successfully in the first transmission resource, then first communication node is determined Whether there is the redundant data bits block that second communication node is sent in the second transmission resource, if it is not, The first communication node feedback reception failure information gives second communication node, if so, then first communication node It is using all or part received the redundant data bits block and the data to be transmitted bit block received trial It is no that the data to be transmitted bit block is successfully decoded, if the decoding is successful, then the first communication node feedback reception success Information gives second communication node, if decoding failure, the first communication node feedback reception failure information is to described Second communication node；

Step 110, second communication node receives the reception failure information of the first communication node feedback Afterwards, the data to be transmitted bit block is divided into T segment data bit block, then by the T segment data bit block Bit contraposition carry out xor operation, obtain a retransmitted redundant data bit block, second communication node is described first Communication node sends for the 3rd of its distribution and sends the retransmitted redundant data bit block in resource, wherein, the described 3rd sends Length of the resource in time domain is less than described first and sends length of the resource in time domain, and the described 3rd sends resource on frequency domain Subcarrier spacing be the described first send subcarrier spacing of the resource on frequency domain 4 times；

Step 112, first communication node is received after the retransmitted redundant data bit block, by the retransmitted redundant number After being handled according to bit block and the data to be transmitted bit block received before, judge whether that described treat can be properly received Transmit data bit block.

Embodiment 1

Base station sends resource and second to terminal A distribution first and sends resource, wherein the first transmission resource is terminal A Occupy alone, the second transmission resource is that terminal A and other terminal A shares.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, base station feedback, which is received, successfully to be believed Cease and give terminal A；If base station decodes the data to be transmitted bit block not successfully in the first transmission resource, base station determines institute The redundant data bits block for whether having terminal A to send in the second transmission resource is stated, is lost if it is not, base station feedback is received Lose information and give terminal A, if so, then base station is using all or part redundant data bits block that receives and receives The data to be transmitted bit block attempts the data to be transmitted bit block whether can be successfully decoded, if the decoding is successful, then base Feedback reception successful information of standing gives terminal A, if decoding failure, base station feedback reception failure information gives terminal A.

Terminal A is received after the reception failure information of base station feedback, and the data to be transmitted bit block is divided into T Individual segment data bit block, then carries out xor operation by the bit contraposition of the T segment data bit block（Such as 2 points Segment data bit block, respectively 1111, and 1011, it is 0100 after XOR）, obtain a retransmitted redundant data bit block, terminal A In base station to send the retransmitted redundant data bit block in the 3rd transmission resource of its distribution, wherein, the described 3rd sends money Length of the source in time domain is less than described first and sends length of the resource in time domain, and the described 3rd sends resource on frequency domain Subcarrier spacing is the described first send subcarrier spacing of the resource on frequency domain 4 times, the purpose for the arrangement is that reduction data Propagation delay time.

Base station is received after the retransmitted redundant data bit block, is received the retransmitted redundant data bit block and before After the data to be transmitted bit block is handled, judge whether that the data to be transmitted bit block can be properly received.

Embodiment 2

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 base station feedback receives successful information and given Terminal A.

Embodiment 3

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.

Embodiment 4

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.

Embodiment 5

If terminal A is less than 20dB by measuring the Signal to Interference plus Noise Ratio that the measuring reference signals that base station is sent are obtained, and described The correlation time that the measuring reference signals that second communication node is sent according to base station measure channel is more than 0.5ms, then terminal A is used The second 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, single precoding mode in resource.Preferably, the single precoding mode Refer to that second communication node is carried out on each subcarrier of the described second transmission resource using identical pre-coding matrix Data transfer.

Embodiment 6

If terminal A is less than 20dB by measuring the Signal to Interference plus Noise Ratio that the measuring reference signals that base station is sent are obtained, and described The correlation time that the measuring reference signals that second communication node is sent according to base station measure channel is less than or equal to 0.5ms, then terminal A The demodulation reference sent using the 3rd demodulated reference signal transmissions pattern for demodulating the data to be transmitted bit block is believed Number, and the demodulated reference signal and the data to be transmitted bit block are sent in the described first transmission resource, described the The redundant data bits block is transmitted by spread spectrum, open-loop precoding mode in two transmission resources.Preferably, the open loop prelists Code mode refers to that terminal A is used alternatingly predefined one group of pre-coding matrix on the subcarrier of the described second transmission resource and carried out There are mapping relations with the sequence that the demodulated reference signal is used in data transfer, predefined one group of pre-coding matrix, Such as sequence A correspondence pre-coding matrix group A, sequence B correspondence pre-coding matrix group B.

Embodiment 7

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.

Embodiment 8

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.

Terminal A is received after the reception failure information of base station feedback, and the data to be transmitted bit block is divided into T Individual segment data bit block, then carries out xor operation by the bit contraposition of the T segment data bit block（Such as 2 points Segment data bit block, respectively 1111, and 1011, it is 0100 after XOR）, obtain a retransmitted redundant data bit block, terminal A Being sent in base station for the 3rd of its distribution uses transmission wave beam BF-C to send the retransmitted redundant data bit block in resource, its In, the described 3rd, which sends length of the resource in time domain, is less than length of the described first transmission resource in time domain, the described 3rd It is the described first send subcarrier spacing of the resource on frequency domain 4 times to send subcarrier spacing of the resource on frequency domain, so The purpose done is to reduce the propagation delay time of data.

Preferably, the beam coverage for sending wave beam BF-B includes the beam coverage for sending wave beam BF-A, sends Wave beam BF-C beam coverage includes the beam coverage for sending wave beam BF-B.

Preferably, base station receives the first transmission resource, the second transmission money respectively using wave beam BF-D, BF-E, BF-F is received Source, the 4th are by the content sent in resource, and the beam coverage for receiving wave beam BF-F is covered comprising the wave beam for receiving wave beam BF-E Lid scope, the beam coverage for receiving wave beam BF-E includes the beam coverage for receiving wave beam BF-D.

Embodiment 9

Preferably, if base station sends reception failure in resource first, and determine that terminal A does not send the redundant digit According to bit block, the reception failure information is fed back at the time of base station is after the described first transmission resource, if base station is in the first hair Reception failure in resource is sent, and determines that terminal A sends the redundant data bits block, as shown in Figure 4, base station receives described Second sends before resource after the partial bit of the redundant data bits block of 1/2nd time domain transmitted over resources, with connecing before The data to be transmitted bit block received is merged, and judgement is received successfully or reception failure, and then feedback reception is successfully Or reception failure information gives terminal A, advantage of this is that allow terminal A know as early as possible base station whether successfully decoded, enter And quickly determine the need for carrying out data retransmission operation.

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

1. a kind of improved data transmission method, it is characterised in that：It the described method comprises the following steps：

1) the first communication node sends resource and second to the second communication node distribution first and sends 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 is sent out using the described second transmission resource by open-loop precoding mode The redundant data bits block is sent, then second communication node is sent using the 3rd demodulated reference signal transmissions pattern and used In the demodulated reference signal for demodulating the data to be transmitted bit block, and send in the described first transmission resource the demodulation ginseng Signal and the data to be transmitted bit block are examined, is transmitted in the described second transmission resource by spread spectrum, open-loop precoding mode 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 the first communication node feedback reception successful information is to second communication node；If first communication node The data to be transmitted bit block is decoded not successfully in the first transmission resource, then first communication node determines described second The redundant data bits block for whether having second communication node to send in resource is sent, if it is not, described first Communication node feedback reception failure information gives second communication node, if so, then first communication node utilizes reception To all or part redundant data bits block and the data to be transmitted bit block that receives attempt whether to succeed The data to be transmitted bit block is decoded, if the decoding is successful, then the first communication node feedback reception successful information is to institute The second communication node is stated, if decoding failure, the first communication node feedback reception failure information is to the described second communication Node；

5) second communication node is received after the reception failure information of the first communication node feedback, is treated described Transmission data bit block be divided into T segment data bit block, then by the bit of the T segment data bit block align into Row xor operation, obtains a retransmitted redundant data bit block, and second communication node is it in first communication node The retransmitted redundant data bit block is sent in 3rd transmission resource of distribution, wherein, the described 3rd sends resource in time domain Length be less than described first and send length of the resource in time domain, the described 3rd sends subcarrier spacing of the resource on frequency domain It is the described first send subcarrier spacing of the resource on frequency domain 4 times；

6) first communication node is received after the retransmitted redundant data bit block, by the retransmitted redundant data bit block with The data to be transmitted bit block received is handled before after, judge whether that the data to be transmitted ratio can be properly received Special block.

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；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.

5. 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.

6. 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.

7. 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.

8. 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.

9. data transmission method according to claim 1, it is characterised in that：Second communication node uses transmission wave beam BF-A sends the data to be transmitted bit block in the described first transmission resource, is sent out using wave beam BF-B is sent described second Send and the redundant data bits block is sent in resource, send described heavy in the described 3rd transmission resource using transmission wave beam BF-C Redundant data bits block is passed, wherein, the wave beam that the beam angle for sending wave beam BF-A is less than the transmission wave beam BF-B is wide Degree, the beam angle for sending wave beam BF-B is less than the beam angle of the transmission wave beam BF-C.

10. data transmission method according to claim 1, it is characterised in that：If first communication node is first Reception failure in resource is sent, and determines that second communication node does not send the redundant data bits block, described first The reception failure information is fed back at the time of communication node is after the described first transmission resource, if first communication node exists First sends reception failure in resource, and determines that second communication node sends the redundant data bits block, described first Communication node receives described second and sends the redundant data bits block of 1/2nd time domain transmitted over resources before resource After partial bit, merged with the data to be transmitted bit block that receives before, judgement is received successfully or reception mistake Lose, then feedback reception success or reception failure information give second communication node.