CN106487487A

CN106487487A - A kind of improved data transmission method

Info

Publication number: CN106487487A
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: 2017-03-08
Anticipated expiration: 2036-11-01
Also published as: CN106487487B

Abstract

The invention provides a kind of improved data transmission method, is that the second communication node distribution first sends resource and the second transmission resource including the first communication node；Second communication node is generated comprising the data to be transmitted bit block that cyclic redundancy check information, length are Y；Second communication node has three kinds of candidate's demodulated reference signal transmissions patterns；First communication node receives the described first demodulated reference signal sent in resource, determines the transmission mode of the demodulated reference signal, and feeds back whether receive successful message to the second communication node；After second communication node receives the reception failure information of the first communication node feedback, retransmitted redundant data bit block is generated, and is sent in the 3rd transmission resource that the first communication node is its distribution；The data to be transmitted bit block for receiving retransmitted redundant data bit block with receive before is processed by the first communication node.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 moving communicating field, the transmission side data in more particularly to a kind of 5th generation wireless communication system Method.

Background technology

With the rise of intelligent terminal and abundant, the data user's number in wireless communication system of wireless data application business It is significantly increased, data content is no longer confined to traditional word or image, future customer is to high definition video, mobile TV etc. The demand of multimedia service is more and more, causes wireless network traffic to present 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, and this is to radio communication system The network capacity of system is put forward higher requirement.

Towards the year two thousand twenty and future, mobile Internet and internet of things service will become the main driving of 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 intensive firmly Quarter, office, stadium, outdoor rally, subway, through street, high ferro and wide area covering etc. is with ultra high flux density, superelevation Connection number density, the scene of ultrahigh-mobility feature, it is also possible to provide the user 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, realizes real " 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 Energy challenge is different, and 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 scene of low time delay.

For the highly reliable technology scene of low time delay, need to improve the first success rate for passing of data as far as possible, but current Transmission mechanism is designed with the first success rate for passing 90%, it is impossible to meet the design requirement of future broadband wireless communication systems.

Content of the invention

It is an object of the invention to the problems such as overcoming the difference of data transmission credibility present in the 5th generation wireless communication system, A kind of improved data transmission method is provided.

For reaching 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 distributes first to the second communication node Send resource and second and resource is sent, wherein described first transmission resource is that second communication node occupies alone, described Second transmission resource is that second communication node and other second communication nodes are shared, and described second sends the frequency domain of resource Subcarrier number is more than less than the described first subcarrier in frequency domain number for sending resource, the time domain length of the second transmission resource Described first time domain length for sending resource, it is continuous in time domain that the second transmission resource sends resource with described first , described second sends resource after the first transmission resource；2）Second communication node generates length treating for Y Transmission data bit block, extracts X bit from the data to be transmitted bit block and generates redundant data bits block, wherein, X with Y is positive integer, and X is less than Y, includes cyclic redundancy check information in the data to be transmitted bit block；3）Second communication section Point 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 ginseng Signal transfer mode is examined, the 3rd demodulated reference signal transmissions pattern, if second communication node is determined only using described the One sends resource sends the data to be transmitted bit block, then second communication node uses first demodulated reference signal Transmission mode sends the demodulated reference signal for demodulating the data to be transmitted bit block, and sends in resource described first The demodulated reference signal is sent with the data to be transmitted bit block；If second communication node is determined using described the One sends resource sends the data to be transmitted bit block, and sends resource by spread spectrum, single precoding using described second Mode sends the redundant data bits block, then second communication node uses the second demodulated reference signal transmissions pattern The demodulated reference signal for demodulating the data to be transmitted bit block is sent, and described in sending in resource and send described first Demodulated reference signal and the data to be transmitted bit block, send by spread spectrum, single precoding side in resource described second Formula transmits the redundant data bits block；If second communication node determines sent described in resource transmission using described first Data to be transmitted bit block, and the redundant data bits are sent by open-loop precoding mode using the described second transmission resource Block, then second communication node sent for demodulating the number to be transmitted using the 3rd demodulated reference signal transmissions pattern According to the demodulated reference signal of bit block, and it is to be transmitted with described to send the demodulated reference signal in the described first transmission resource Data bit block, transmits the redundant data bits block by spread spectrum, open-loop precoding mode in the described second transmission resource； 4）First communication node receives the described first demodulated reference signal sent in resource, determines the demodulated reference signal Transmission mode, if first communication node is successfully decoded the data to be transmitted bit block in the first transmission resource, The first communication node feedback reception successful information gives second communication node；If first communication node is first The unsuccessful decoding data to be transmitted bit block in resource is sent, then first communication node determines the described second transmission money The redundant data bits block for whether having second communication node to send on source, if it is not, first communication section Point feedback reception failure information gives second communication node, if it has, then first communication node is complete using received The portion or part redundant data bits block and the data to be transmitted bit block for receiving attempt whether institute being successfully decoded Data to be transmitted bit block is stated, if the decoding is successful, then the first communication node feedback reception successful information gives described second Communication node, if decoding failure, the first communication node feedback reception failure information gives second communication node；5） After second communication node receives the reception failure information of first communication node feedback, by the number to be transmitted T segment data bit block is divided into according to bit block, then the bit contraposition of the T segment data bit block is carried out XOR Operation, obtains a retransmitted redundant data bit block, and second communication node is its distribution in first communication node The retransmitted redundant data bit block is sent in 3rd transmission resource, wherein, the described 3rd sends length of the resource in time domain Length of the resource in time domain is sent less than described first, and the 3rd transmission subcarrier spacing of the resource on frequency domain is described First send subcarrier spacing of the resource on frequency domain 4 times；6）First communication node receives the retransmitted redundant data After bit block, after the retransmitted redundant data bit block is processed with the data to be transmitted bit block for receiving before, Judge whether to be properly received the data to be transmitted bit block.

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 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, transmit institute by spread spectrum, single precoding mode in the described second transmission resource 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 For the demodulated reference signal of the data to be transmitted bit block is demodulated, and the demodulation is sent in the described first transmission resource Reference signal and the data to be transmitted bit block, are passed by spread spectrum, open-loop precoding mode in the described second transmission resource The defeated redundant data bits block.

Further, if second communication node is by measuring the measurement reference letter that first communication node sends Number Signal to Interference plus Noise Ratio for obtaining is less than 20dB, and the measurement reference that second communication node sends according to first communication node Signal measures the correlation time of channel more than 0.5ms, then second communication node is using the 3rd demodulated reference signal biography Defeated pattern sends the demodulated reference signal for demodulating the data to be transmitted bit block, and sends out in the described first transmission resource Send the demodulated reference signal and the data to be transmitted bit block, described second send resource on by spread spectrum, single pre- Coded system transmits the redundant data bits block.

Further, if second communication node is by measuring the measurement reference letter that first communication node sends Number Signal to Interference plus Noise Ratio for obtaining is less than 20dB, and the measurement reference that second communication node sends according to first communication node Signal measures the correlation time of channel less than or equal to 0.5ms, then second communication node is using the 3rd demodulation reference letter Number transmission mode sends the demodulated reference signal for demodulating the data to be transmitted bit block, and sends resource described first The upper transmission demodulated reference signal and the data to be transmitted bit block, by spread spectrum in the described second transmission resource, open Ring precoding mode transmits the redundant data bits block.

Further, second communication node using frequency expansion sequence to be first communication node logical by signaling Know, if total subcarrier number that the second transmission resource includes is more than 256, frequency expansion sequence is pseudo-random sequence, such as Less than or equal to 256, then frequency expansion sequence is walsh sequence to total subcarrier number that really described second transmission resource includes.

Further, transmission power ratio of second communication node on 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/the 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 using identical pre-coding matrix on individual subcarrier.

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 carry out data transmission on carrier wave.

Further, predefined one group of pre-coding matrix is existed with the transmission mode of the demodulated reference signal and reflects Penetrate relation.

Further, second communication node is sent in resource described in transmission described first using wave beam BF-A is sent Data to be transmitted bit block, sends the redundant data bits block using wave beam BF-B is sent in the described second transmission resource, The retransmitted redundant data bit block is sent using wave beam BF-C is sent in the described 3rd transmission resource, wherein, the transmission Beam angle of the beam angle of wave beam BF-A less than the transmission wave beam BF-B, the beam angle of the transmission wave beam BF-B are little Beam angle in the transmission wave beam BF-C.

Further, if first communication node sends reception failure in resource first, and determine described second Communication node does not send the redundant data bits block, and first communication node is when 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 the described second transmission resource the first two After the partial bit of the redundant data bits block of/mono- time domain transmitted over resources, described to be transmitted with received before Data bit block is merged, and judges to receive success or reception failure, and then feedback reception success or reception failure information are given Second communication node.

The invention has the beneficial effects 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；Second communication node is generated comprising cyclic redundancy school Test the data to be transmitted bit block of information, length for Y；Second communication node has three kinds of candidate's demodulated reference signal transmissions patterns； First communication node receives the described first demodulated reference signal sent in resource, determines the transmission mould of the demodulated reference signal Formula, and feed back successful message whether is received 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 be its distribution the 3rd transmission money Send on source；The data to be transmitted bit block for receiving retransmitted redundant data bit block with receive before is carried out by the first communication node Process.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.

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

Accompanying drawing is combined below by specific embodiment to be described in further detail the present invention.

As shown in Figure 1, method of the present invention flow process is as follows：

Step 102, the first communication node send resource and second to the second communication node distribution first and send resource, wherein described First send resource be that second communication node occupies alone, described second transmission resource be second communication node and Other second communication nodes are shared, and the described second subcarrier in frequency domain number for sending resource sends resource less than described first Subcarrier in frequency domain number, described second sends the time domain length of resource more than the described first time domain length for sending resource, described Second transmission resource is continuous with the described first transmission resource in time domain, and described second sends resource is located at described first After sending resource；

Step 104, second communication node generate data to be transmitted bit block of the length for Y, from the data to be transmitted ratio X bit being extracted in special block and generating redundant data bits block, wherein, X and Y is positive integer, and X is less than Y, the data to be transmitted ratio Include cyclic redundancy check information in special block；

Step 106, second communication node have three kinds of candidate's demodulated reference signal transmissions patterns, are referred to as the first demodulation ginseng Signal transfer mode is examined, 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 node Sent using the first demodulated reference signal transmissions pattern and believe for demodulating the demodulation reference of the data to be transmitted bit block Number, and the demodulated reference signal is sent with the data to be transmitted bit block in the described first transmission resource；If described Second communication node determines that sending resource using described first sends the data to be transmitted bit block, and uses described second Resource is sent to send the redundant data bits block by spread spectrum, single precoding mode, then second communication node uses institute State the second 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, send described second and provide The redundant data bits block is transmitted by spread spectrum, single precoding mode on source；If second communication node determines made Resource is sent with described first and the data to be transmitted bit block is sent, and prelisted by open loop using the described second transmission resource Code mode sends the redundant data bits block, then second communication node uses the 3rd demodulated reference signal transmissions mould Formula sends the demodulated reference signal for demodulating the data to be transmitted bit block, and sends transmission institute in resource described first Demodulated reference signal and the data to be transmitted bit block is stated, is sent by spread spectrum, open-loop precoding in resource described second Mode transmits the redundant data bits block；

Step 108, first communication node receive the described first demodulated reference signal sent in resource, determine the demodulation The transmission mode of reference signal, if first communication node is successfully decoded the data to be transmitted in the first transmission resource Bit block, then the first communication node feedback reception successful information is to second communication node；If first communication Node is unsuccessful in the first transmission resource to decode the data to be transmitted bit block, then first communication node determines described The redundant data bits block for whether having second communication node to send in second transmission resource, if it is not, described First communication node feedback reception failure information gives second communication node, if it has, then first communication node is utilized Whether all or part that the receives redundant data bits block and the data to be transmitted bit block for receiving are attempted The data to be transmitted bit block is successfully decoded, if the decoding is successful, then the first communication node feedback reception successful information To second communication node, if decoding failure, the first communication node feedback reception failure information gives described second Communication node；

Step 110, after second communication node receives the reception failure information of first communication node feedback, will The data to be transmitted bit block is divided into T segment data bit block, then by the bit of the T segment data bit block Contraposition carries out xor operation, obtains a retransmitted redundant data bit block, and second communication node is in first communication section Point for its distribute the 3rd transmission resource on send the retransmitted redundant data bit block, wherein, described 3rd transmission resource exists Length in time domain sends length of the resource in time domain less than described first, and the described 3rd sends son load of the resource on frequency domain Wave spacing is 4 times of the described first transmission subcarrier spacing of the resource on frequency domain；

Step 112, after first communication node receives the retransmitted redundant data bit block, by the retransmitted redundant data ratio After special block and the data to be transmitted bit block for receiving before are processed, judge whether to be properly received described to be transmitted Data bit block.

Embodiment 1

Base station to terminal A distribution first send resource and second send resource, wherein described first transmission resource be terminal A alone Occupy, the second transmission resource is that terminal A and other terminals A are shared.Preferably, as shown in Figure 2, described second Send the subcarrier in frequency domain number of resource less than the described first subcarrier in frequency domain number for sending resource, described second sends resource Time domain length more than described first send resource time domain length, described second send resource with described first send resource when It is continuous on domain, described second sends resource after the first transmission resource.

Terminal A generates the data to be transmitted bit block that length is 100, takes out from the data to be transmitted bit block equal intervals Take 25 bits and generate redundant data bits block, the cyclic redundancy check information comprising 4 bits in 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 the demodulated reference signal is sent with 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, send in resource described second and lead to 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 is using the 3rd demodulation Reference signal transmission pattern sends the demodulated reference signal for demodulating the data to be transmitted bit block, and at described first Send in resource and the demodulated reference signal and the data to be transmitted bit block is sent, send by expanding in resource described second Frequently, open-loop precoding mode transmits the redundant data bits block.

Base station receives the described first demodulated reference signal sent in resource, determines the transmission mould of the demodulated reference signal Formula, if base station is successfully decoded the data to be transmitted bit block in the first transmission resource, base station feedback is received successfully to be believed Cease to terminal A；If base station is unsuccessful in the first transmission resource decodes the data to be transmitted bit block, base station determines institute The redundant data bits block for whether having terminal A to send in the second transmission resource is stated, if it is not, base station feedback is received losing Information is lost to terminal A, if it has, then base station using all or part for the receiving redundant data bits block and receives The data to be transmitted bit block attempts the data to be transmitted bit block whether is successfully decoded, if the decoding is successful, then base Feedback reception successful information stand to terminal A, if decoding failure, base station feedback reception failure information is to terminal A.

After terminal A receives the reception failure information of base station feedback, the data to be transmitted bit block is divided into T Then the bit contraposition of the T segment data bit block is carried out xor operation by individual 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 The retransmitted redundant data bit block is sent in the 3rd transmission resource that base station is its distribution, wherein, the described 3rd sends money Length of the source in time domain sends length of the resource in time domain less than described first, and the described 3rd sends resource on frequency domain Subcarrier spacing is 4 times of the described first transmission subcarrier spacing of the resource on frequency domain, and the purpose of do so is to reduce data Propagation delay time.

After base station receives the retransmitted redundant data bit block, by the retransmitted redundant data bit block with receive before After the data to be transmitted bit block is processed, judge whether to be properly received the data to be transmitted bit block.

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 retransmit, terminal A use 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 is sent with the data to be transmitted bit block in one transmission resource.

Base station receives the described first demodulated reference signal sent in resource, determines the transmission mould of the demodulated reference signal Formula, base station are successfully decoded the data to be transmitted bit block in the first transmission resource, then base station feedback receives successful information and gives Terminal A.

Embodiment 3

If terminal A forward direction base station send in data procedures and occur data to retransmit, and terminal A sends according to base station Measuring reference signals measure the correlation time of channel more than 0.5ms, then terminal A is using the second demodulated reference signal transmissions mould Formula sends the demodulated reference signal for demodulating the data to be transmitted bit block, and sends transmission institute in resource described first Demodulated reference signal and the data to be transmitted bit block is stated, is sent by spread spectrum, single precoding in resource described second Mode transmits the redundant data bits block.Preferably, the single precoding mode refers to second communication node in institute Carried out data transmission using identical pre-coding matrix on each subcarrier for stating the second transmission resource.

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 as judgment basis during data）, 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 demodulation reference letter is sent in the described first transmission resource Number with the data to be transmitted bit block, transmitted by spread spectrum, open-loop precoding mode in the described second transmission resource 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 carry out data transmission, predefined one group of pre-coding matrix with described Demodulated reference signal using sequence there are mapping relations, for example, sequence A correspond to pre-coding matrix group A, sequence B correspond to prelist Code matrix group B.

Embodiment 5

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

Embodiment 6

If terminal A is less than 20dB and described by measuring the Signal to Interference plus Noise Ratio that the measuring reference signals that base station sends are obtained The measuring reference signals that second communication node is sent according to base station measure correlation time of channel less than or equal to 0.5ms, then terminal A Sent using the 3rd demodulated reference signal transmissions pattern and believe for demodulating the demodulation reference of the data to be transmitted bit block Number, and the demodulated reference signal and the data to be transmitted bit block is 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 carries out Data transfer, predefined one group of pre-coding matrix and the demodulated reference signal using sequence there are mapping relations, For example sequence A corresponds to pre-coding matrix group A, and sequence B corresponds to 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, send in resource described second and lead to Cross spread spectrum, single precoding mode and transmit the redundant data bits block.Preferably, terminal A using frequency expansion sequence be base station By signaled, if total subcarrier number that the second transmission resource includes is more than 256, frequency expansion sequence is puppet Random sequence, if total subcarrier number that the second transmission resource includes 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 terminal A on described second each subcarrier for sending resource Big more than the 3dB of the transmit power on each subcarrier on source, or big log2（Second total number of sub-carriers/for sending resource One total number of sub-carriers for sending 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 is using the 3rd demodulation Reference signal transmission pattern sends the demodulated reference signal for demodulating the data to be transmitted bit block, and at described first Send in resource and the demodulated reference signal and the data to be transmitted bit block is sent, send by expanding in resource described second Frequently, open-loop precoding mode transmits the redundant data bits block.Preferably, terminal A using frequency expansion sequence be that base station passes through Signal, if total subcarrier number that the second transmission resource includes is more than 256, frequency expansion sequence is pseudorandom Sequence, if total subcarrier number that the second transmission resource includes 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 terminal A on 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/the first for sending resource 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 by sending the wave beam BF-A transmission demodulated reference signal and the data to be transmitted ratio in resource described first 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, make in the described second transmission resource The redundant data bits block is transmitted by spread spectrum, single precoding mode with wave beam BF-B is sent.

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 is using the 3rd demodulation Reference signal transmission pattern sends the demodulated reference signal for demodulating the data to be transmitted bit block, and at described first Send in resource and send the demodulated reference signal and the data to be transmitted bit block, described second send resource on using send out Wave beam BF-B is sent to transmit the redundant data bits block by spread spectrum, open-loop precoding mode.

After terminal A receives the reception failure information of base station feedback, the data to be transmitted bit block is divided into T Then the bit contraposition of the T segment data bit block is carried out xor operation by individual 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 The retransmitted redundant data bit block is sent using transmission wave beam BF-C in the 3rd transmission resource that base station is its distribution, its In, the described 3rd sends length of the resource in time domain sends length of the resource in time domain less than described first, and 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 that does is to reduce the propagation delay time of data.

Preferably, the beam coverage of wave beam BF-B is sent comprising the beam coverage for sending wave beam BF-A, send The beam coverage of wave beam BF-C is comprising 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 press 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, receives the beam coverage of wave beam BF-E comprising 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 moment after base station sends resource described first feeds back the reception failure information, if base station is at first 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, and connects before The data to be transmitted bit block for receiving is merged, and judges to receive success or reception failure, then feedback reception success Or reception failure information is to terminal A, advantage of this is that and allow terminal A know base station whether successfully decoded as early as possible, enter And quickly determine the need for carrying out data retransmission operation.

Test result indicate that, using method of the present invention, by flexibly being provided using distribution according to channel circumstance change Source carries out redundant data transmissions, can be effective against severe channel variation situation in high-frequency communication, and the reliability of data transfer reaches To more than 99%, data transfer delay is significantly reduced.

Above content is further description made for the present invention with reference to specific preferred embodiment, it is impossible to assert Being embodied as of the present invention is confined to these explanations.For general technical staff of the technical field of the invention, On the premise of 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：The method comprising the steps of：

1）First communication node sends resource and second to the second communication node distribution first and sends resource, wherein described first It is that second communication node occupies alone to send resource, the second transmission resource be second communication node and other the Two communication nodes sharing, the described second subcarrier in frequency domain number for sending resource sends frequency domain of resource less than described first Variable number, described second send resource time domain length more than described first send resource time domain length, described second It is continuous with the described first transmission resource in time domain to send resource, and described second sends resource is located at the first transmission resource Afterwards；

2）Second communication node generates data to be transmitted bit block of the length for Y, from the data to be transmitted bit block Extract X bit and redundant data bits block is generated, wherein, X and Y is positive integer, and X is less than Y, in the data to be transmitted bit block Comprising 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 is sent with the data to be transmitted bit block in the first transmission resource；If second communication Node determines that using described first to send resource sends the data to be transmitted bit block, and it is logical to send resource using described second Cross spread spectrum, single precoding mode and the redundant data bits block is sent, then second communication node is solved using described second Reference signal transmission pattern is adjusted to send demodulated reference signal for demodulating the data to be transmitted bit block, and described first Send in resource and the demodulated reference signal and the data to be transmitted bit block is sent, 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 sends resource sends the data to be transmitted bit block, and is sent out by open-loop precoding mode using the described second transmission resource The redundant data bits block is sent, then second communication node is sent using the 3rd demodulated reference signal transmissions pattern and uses In the demodulated reference signal for demodulating the data to be transmitted bit block, and the demodulation ginseng is sent in the described first transmission resource Signal and the data to be transmitted bit block is examined, is transmitted by spread spectrum, open-loop precoding mode in the described second transmission resource The redundant data bits block；

4）First communication node receives the described first demodulated reference signal sent in resource, determines that the demodulation reference is believed 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 unsuccessful decoding data to be transmitted bit block in resource is sent first, 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 it has, then first communication node is using reception To all or part redundant data bits block and the data to be transmitted bit block for receiving whether attempt can be successful 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 second communication Node；

5）After second communication node receives the reception failure information of first communication node feedback, treat described Transmission data bit block is 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 which 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 less than described first send length of the resource in time domain, described 3rd send 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）After first communication node receives the retransmitted redundant data bit block, by the retransmitted redundant data bit block with After the data to be transmitted bit block for receiving before is processed, judge whether to be properly received the data to be transmitted ratio 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 does not occur data to retransmit, then second communication node is solved using described first Reference signal transmission pattern is adjusted to send demodulated reference signal for demodulating the data to be transmitted bit block, and described first Send in resource the demodulated reference signal is sent with the data to be transmitted bit block.

4. 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 occurs data to retransmit, and second communication node is according to the described first communication The measuring reference signals that node sends measure the correlation time of channel more than 0.5ms, then second communication node is using 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 in the first transmission resource, is sent, 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 is sent in data procedures occurs data to retransmit, and second communication node is according to the described first communication The measuring reference signals that node sends measure the correlation time of channel less than or equal to 0.5ms, then the second communication node use 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, send 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 is by measurement The Signal to Interference plus Noise Ratio that the measuring reference signals that first communication node sends are obtained is less than 20dB, and the second communication node root The measuring reference signals sent according to first communication node measure the correlation time of channel 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 3rd demodulated reference signal transmissions pattern Reference signal, and the demodulated reference signal and the data to be transmitted bit block is 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 sends are obtained State the measuring reference signals that the second communication node sent according to first communication node measure correlation time of channel less than etc. In 0.5ms, then second communication node is sent for demodulating described treating using the 3rd demodulated reference signal transmissions pattern The demodulated reference signal of transmission data bit block, and described first transmission resource on send the demodulated reference signal with described Data to be transmitted bit block, transmits the redundant data by spread spectrum, open-loop precoding mode in the described second transmission resource 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 are that first communication node passes through to signal, if total subcarrier number that the second transmission resource includes is more than 256, then frequency expansion sequence is pseudo-random sequence, if total subcarrier number that the second transmission resource includes 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 at described second 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（Second total number of sub-carriers/the 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 using identical pre-coding matrix on each subcarrier of the described second transmission resource；Institute State open-loop precoding mode refer to second communication node described second transmission resource subcarrier on be used alternatingly 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 is using transmission wave beam BF-A sends the data to be transmitted bit block in the described first transmission resource, using transmission wave beam BF-B at described second Send in resource and the redundant data bits block is sent, sent in the described 3rd transmission resource using transmission wave beam BF-C described heavy Redundant data bits block is passed, wherein, the beam angle of the transmission wave beam BF-A is less than the wave beam width of the transmission wave beam BF-B Degree, the beam angle of the transmission wave beam BF-B are 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 Send reception failure in resource, and determine that second communication node does not send the redundant data bits block, described first Moment after communication node sends resource described first feeds back the reception failure information, if first communication node exists First sends reception failure in resource, and determines the second communication node transmission redundant data bits block, and described first Communication node receives the redundant data bits block of 1/2nd time domain transmitted over resources before the described second transmission resource After partial bit, merge with the data to be transmitted bit block for receiving before, judge to receive successfully or receive to lose Lose, then feedback reception success or reception failure information give second communication node.