CN106487487B - A kind of improved data transmission method - Google Patents

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

An Improved Data Transmission Method

technical field

The invention relates to the field of mobile communication, in particular to a data transmission method in the fifth generation wireless communication system.

Background technique

With the rise of smart terminals and the enrichment of wireless data application services, the number of data users in wireless communication systems has increased significantly, and data content is no longer limited to traditional text or images. The demand is increasing, leading to the explosive growth of wireless network traffic. According to market forecasts, in the next 10 years, wireless data services will increase by 500 to 1,000 times, with an average annual growth of 1.6 to 2 times, which puts higher requirements on the network capacity of wireless communication systems.

Facing 2020 and the future, mobile Internet and Internet of Things services will become the main driving force for the development of mobile communications. 5G will meet the diverse business needs of people in various areas such as living, working, leisure, and transportation, even in dense residential areas, offices, stadiums, open-air gatherings, subways, expressways, high-speed rails, and wide-area coverage. It can also provide users with extreme business experiences such as ultra-high-definition video, virtual reality, augmented reality, cloud desktop, and online games. At the same time, 5G will penetrate into the Internet of Things and various industries, and will be deeply integrated with industrial facilities, medical equipment, transportation, etc., to effectively meet the diversified business needs of vertical industries such as industry, medical care, and transportation, and realize the real " Internet of Everything".

5G will solve the challenges brought about by differentiated performance indicators in diverse application scenarios. Different application scenarios face different performance challenges. User experience rate, traffic density, delay, energy efficiency, and number of connections may all become challenges for different scenarios. index. Starting from the main application scenarios, business requirements and challenges of the mobile Internet and the Internet of Things, four main 5G technical scenarios can be summarized: continuous wide-area coverage, high-capacity hotspots, large connections with low power consumption, and low latency and high reliability.

For technical scenarios with low latency and high reliability, it is necessary to increase the success rate of the first data transmission as much as possible. However, the current transmission mechanism is designed with a success rate of 90% for the first transmission, which cannot meet the design requirements of future wireless communication systems.

Contents of the invention

The purpose of the present invention is to overcome the problems of poor data transmission reliability in the fifth generation wireless communication system, and provide an improved data transmission method.

For reaching above-mentioned object, the present invention realizes by following technical scheme:

An improved data transmission method, comprising the following steps: 1) A first communication node allocates a first transmission resource and a second transmission resource to a second communication node, wherein the first transmission resource is exclusively occupied by the second communication node The second transmission resource is shared by the second communication node and other second communication nodes, and the number of frequency-domain subcarriers of the second transmission resource is smaller than the number of frequency-domain subcarriers of the first transmission resource number, the time domain length of the second transmission resource is greater than the time domain length of the first transmission resource, the second transmission resource and the first transmission resource are continuous in the time domain, and the second transmission resource The resource is located after the first transmission resource; 2) The second communication node generates a data bit block of length Y to be transmitted, and X bits are extracted from the data bit block to be transmitted to generate a redundant data bit block, wherein , X and Y are positive integers, X is less than Y, and the data bit block to be transmitted contains cyclic redundancy check information; 3) The second communication node has three candidate demodulation reference signal transmission modes, which are called the first A demodulation reference signal transmission mode, a second demodulation reference signal transmission mode, and a third demodulation reference signal transmission mode, if the second communication node determines to use only the first transmission resource to transmit the data bit block to be transmitted , the second communication node uses the first demodulation reference signal transmission mode to transmit the demodulation reference signal used to demodulate the data bit block to be transmitted, and transmit the demodulation reference signal on the first transmission resource adjusting the reference signal and the data bit block to be transmitted; if the second communication node determines to use the first transmission resource to transmit the data bit block to be transmitted, and uses the second transmission resource to transmit If the redundant data bit block is sent in an encoding manner, the second communication node uses the second demodulation reference signal transmission mode to send a demodulation reference signal for demodulating the data bit block to be transmitted, and in the Sending the demodulation reference signal and the data bit block to be transmitted on the first transmission resource, and transmitting the redundant data bit block on the second transmission resource by means of spread spectrum and single precoding; if the The second communication node determines to use the first sending resource to send the data bit block to be transmitted, and uses the second sending resource to send the redundant data bit block through open-loop precoding, then the second communication The node uses the third demodulation reference signal transmission mode to send a demodulation reference signal for demodulating the to-be-transmitted data bit block, and sends the demodulation reference signal and the to-be-transmitted data bit block on the first transmission resource transmit the data bit block, and transmit the redundant data bit block on the second transmission resource by means of spread spectrum and open-loop precoding; 4) the first communication node receives the demodulated data on the first transmission resource reference signal, determining the transmission mode of the demodulation reference signal, and if the first communication node successfully decodes the data bit block to be transmitted on the first transmission resource, the first communication node feeds back reception success information to the the second communication node; if the first communication node fails to decode the data to be transmitted on the first transmission resource than special block, the first communication node determines whether there is the redundant data bit block sent by the second communication node on the second transmission resource, and if not, the first communication node feeds back reception failure information For the second communication node, if there is, the first communication node uses all or part of the received redundant data bit block and the received data bit block to be transmitted to try whether it can successfully decode the If the data bit block to be transmitted is successfully decoded, the first communication node feeds back reception success information to the second communication node, and if the decoding fails, the first communication node feeds back reception failure information to the second communication node node; 5) after the second communication node receives the reception failure information fed back by the first communication node, it divides the data bit block to be transmitted into T segmented data bit blocks, and then divides the T Exclusive OR operation is performed on the bits of the segmented data bit blocks to obtain a retransmission redundant data bit block, and the second communication node transmits the retransmitting redundant data bit blocks, wherein the length of the third transmission resource in the time domain is smaller than the length of the first transmission resource in the time domain, and the subcarrier spacing of the third transmission resource in the frequency domain is 4 times the subcarrier spacing of the first transmission resource in the frequency domain; 6) After the first communication node receives the retransmitted redundant data bit block, it transmits the retransmitted redundant data bit block After processing the previously received data bit block to be transmitted, it is judged whether the data bit block to be transmitted can be successfully received.

Further, the demodulation reference signal transmission mode includes at least one of the following or a combination thereof: a sequence used by the reference signal, a time-frequency resource used by the reference signal, and a pattern of the reference signal.

Further, if no data retransmission occurs in the process of the second communication node sending data to the first communication node before, the second communication node uses the first demodulation reference signal transmission mode to send Demodulating the demodulation reference signal of the data bit block to be transmitted, and sending the demodulation reference signal and the data bit block to be transmitted on the first transmission resource.

Further, if the second communication node sends data to the first communication node before data retransmission occurs, and the second communication node measures the channel according to the measurement reference signal sent by the first communication node If the correlation time is greater than 0.5ms, the second communication node uses the second demodulation reference signal transmission mode to transmit the demodulation reference signal used to demodulate the data bit block to be transmitted, and send The demodulation reference signal and the data bit block to be transmitted are transmitted on the resource, and the redundant data bit block is transmitted on the second transmission resource by means of spectrum spreading and single precoding.

Further, if the second communication node sends data to the first communication node before data retransmission occurs, and the second communication node measures the channel according to the measurement reference signal sent by the first communication node The correlation time is less than or equal to 0.5ms, then the second communication node uses the third demodulation reference signal transmission mode to send the demodulation reference signal used to demodulate the data bit block to be transmitted, and in the first The demodulation reference signal and the data bit block to be transmitted are sent on a transmission resource, and the redundant data bit block is transmitted on the second transmission resource by means of spectrum spreading and open-loop precoding.

Further, if the signal-to-interference-noise ratio obtained by the second communication node by measuring the measurement reference signal sent by the first communication node is lower than 20dB, and the second communication node The correlation time of the channel measured by the reference signal is greater than 0.5ms, then the second communication node uses the third demodulation reference signal transmission mode to send the demodulation reference signal used to demodulate the data bit block to be transmitted, and The demodulation reference signal and the data bit block to be transmitted are transmitted on the first transmission resource, and the redundant data bit block is transmitted on the second transmission resource by means of spectrum spreading and single precoding.

Further, if the signal-to-interference-noise ratio obtained by the second communication node by measuring the measurement reference signal sent by the first communication node is lower than 20dB, and the second communication node The correlation time of the channel measured by the reference signal is less than or equal to 0.5ms, then the second communication node uses the third demodulation reference signal transmission mode to send a demodulation reference signal for demodulation of the data bit block to be transmitted, and The demodulation reference signal and the data bit block to be transmitted are transmitted on the first transmission resource, and the redundant data bit block is transmitted on the second transmission resource by means of spectrum spreading and open-loop precoding.

Further, the spreading sequence used by the second communication node is notified by the first communication node through signaling, if the total number of subcarriers contained in the second transmission resource is greater than 256, the spreading sequence is false A random sequence, if the total number of subcarriers contained in the second transmission resource is less than or equal to 256, the spreading sequence is a Walsh sequence.

Further, the transmission power of the second communication node on each subcarrier of the second transmission resource is greater than the transmission power of each subcarrier on the first transmission resource by more than 3dB, or greater than log ₂ (the first The total number of subcarriers of the second transmission resource/the total number of subcarriers of the first transmission resource) dB or more.

Further, the single precoding mode means that the second communication node uses the same precoding matrix on each subcarrier of the second transmission resource for data transmission.

Further, the open-loop precoding mode means that the second communication node alternately uses a set of predefined precoding matrices on the subcarriers of the second transmission resource for data transmission.

Further, there is a mapping relationship between the predefined set of precoding matrices and the transmission mode of the demodulation reference signal.

Further, the second communication node uses the sending beam BF-A to send the data bit block to be transmitted on the first sending resource, and uses the sending beam BF-B to send the redundant data bit block on the second sending resource. For the remaining data bit block, use the sending beam BF-C to send the retransmission redundant data bit block on the third sending resource, where the beam width of the sending beam BF-A is smaller than that of the sending beam BF-B The beamwidth of the sending beam BF-B is smaller than the beamwidth of the sending beam BF-C.

Further, if the first communication node fails to receive on the first transmission resource, and it is determined that the second communication node has not transmitted the redundant data bit block, the first communication node transmits the redundant data bit block on the first transmission resource Feedback the reception failure information at a later time, if the first communication node fails to receive on the first transmission resource and determines that the second communication node sends the redundant data bit block, the first communication node receives After part of the bits of the redundant data bit block transmitted on the first half of the time domain resource of the second transmission resource, merge with the previously received data bit block to be transmitted, and determine whether the reception is successful or received failure, and then feed back information about successful reception or failure to receive to the second communication node.

The beneficial effects of the present invention are: the present invention provides an improved data transmission method, including the first communication node assigning the first transmission resource and the second transmission resource to the second communication node; verification information, a data bit block to be transmitted with a length of Y; the second communication node has three candidate demodulation reference signal transmission modes; the first communication node receives the demodulation reference signal on the first transmission resource, and determines the demodulation reference signal Refer to the transmission mode of the signal, and feed back the message of whether the reception is successful to the second communication node; after the second communication node receives the reception failure information fed back by the first communication node, it generates a retransmission redundant data bit block, and transmits it in the first communication node The node sends on the third sending resource allocated to it; the first communication node processes the received retransmitted redundant data bit block and the previously received to-be-transmitted data bit block. Compared with the prior art, the method and device (system) of the present invention can effectively increase the robustness of data transmission to meet the service requirements of the fifth generation wireless communication system.

Description of drawings

Fig. 1 is the flowchart of the data transmission method of the present invention;

Fig. 2 is a schematic diagram of sending resource locations;

Fig. 3 is a schematic diagram of a pilot pattern;

Fig. 4 is a schematic diagram of sending feedback information.

specific implementation plan

The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

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

Step 102, the first communication node allocates a first transmission resource and a second transmission resource to the second communication node, wherein the first transmission resource is exclusively occupied by the second communication node, and the second transmission resource is the Shared by the second communication node and other second communication nodes, the number of subcarriers in the frequency domain of the second transmission resource is smaller than the number of subcarriers in the frequency domain of the first transmission resource, and the number of subcarriers in the time domain of the second transmission resource The length is greater than the time domain length of the first transmission resource, the second transmission resource is continuous with the first transmission resource in the time domain, and the second transmission resource is located after the first transmission resource;

Step 104, the second communication node generates a block of data bits to be transmitted with a length of Y, and extracts X bits from the block of data bits to be transmitted to generate a block of redundant data bits, wherein X and Y are positive integers, and X is less than Y, the data bit block to be transmitted contains cyclic redundancy check information;

Step 106, the second communication node has three candidate demodulation reference signal transmission modes, called the first demodulation reference signal transmission mode, the second demodulation reference signal transmission mode, and the third demodulation reference signal transmission mode, if The second communication node determines that only the first transmission resource is used to transmit the data bit block to be transmitted, and the second communication node uses the first demodulation reference signal transmission mode to send transmitting a demodulation reference signal of a data bit block, and sending the demodulation reference signal and the data bit block to be transmitted on the first transmission resource; if the second communication node determines to use the first transmission resource sending the data bit block to be transmitted, and using the second transmission resource to transmit the redundant data bit block through spread spectrum and single precoding, then the second communication node uses the second demodulation reference signal In the transmission mode, sending a demodulation reference signal for demodulating the data bit block to be transmitted, and sending the demodulation reference signal and the data bit block to be transmitted on the first transmission resource, and sending the demodulation reference signal and the data bit block to be transmitted on the second transmission resource The redundant data bit block is transmitted on the transmission resource through spread spectrum and single precoding; if the second communication node determines to use the first transmission resource to send the data bit block to be transmitted, and uses the second The transmission resource transmits the redundant data bit block by means of open-loop precoding, and then the second communication node uses the third demodulation reference signal transmission mode to transmit the demodulation code for demodulating the data bit block to be transmitted. reference signal, and transmit the demodulation reference signal and the data bit block to be transmitted on the first transmission resource, and transmit the redundancy by spreading and open-loop precoding on the second transmission resource data bit block;

Step 108, the first communication node receives the demodulation reference signal on the first transmission resource, determines the transmission mode of the demodulation reference signal, and if the first communication node successfully decodes the demodulation reference signal on the first transmission resource the data bit block to be transmitted, the first communication node feeds back successful reception information to the second communication node; if the first communication node fails to decode the data bit block to be transmitted on the first transmission resource, Then the first communication node determines whether there is the redundant data bit block sent by the second communication node on the second transmission resource, and if not, the first communication node feeds back reception failure information to the The second communication node, if there is one, the first communication node uses all or part of the received redundant data bit block and the received data bit block to be transmitted to try whether it can successfully decode the to-be-transmitted data If the bit block is successfully decoded, the first communication node feeds back reception success information to the second communication node, and if the decoding fails, the first communication node feeds back reception failure information to the second communication node;

Step 110: After receiving the reception failure information fed back by the first communication node, the second communication node equally divides the data bit block to be transmitted into T segmented data bit blocks, and then divides the T segmented data bit blocks Exclusive OR operation is performed on the bits of the segmented data bit block to obtain a retransmission redundant data bit block, and the second communication node sends the retransmission on the third transmission resource allocated to it by the first communication node transmitting redundant data bit blocks, wherein the length of the third transmission resource in the time domain is smaller than the length of the first transmission resource in the time domain, and the subcarrier spacing of the third transmission resource in the frequency domain is 4 times the subcarrier spacing of the first transmission resource in the frequency domain;

Step 112: After receiving the retransmitted redundant data bit block, the first communication node processes the retransmitted redundant data bit block with the previously received data bit block to be transmitted, and determines whether The block of data bits to be transmitted can be successfully received.

Example 1

The base station allocates the first transmission resource and the second transmission resource to the terminal A, wherein the first transmission resource is exclusively occupied by the terminal A, and the second transmission resource is shared by the terminal A and other terminals A. Preferably, as shown in FIG. 2 , the number of frequency domain subcarriers of the second transmission resource is smaller than the number of frequency domain subcarriers of the first transmission resource, and the time domain length of the second transmission resource is greater than the The length of the time domain of the first transmission resource, the second transmission resource and the first transmission resource are continuous in the time domain, and the second transmission resource is located behind the first transmission resource.

Terminal A generates a data bit block with a length of 100 to be transmitted, and extracts 25 bits at equal intervals from the data bit block to be transmitted to generate a redundant data bit block, and the data bit block to be transmitted contains a 4-bit cyclic redundancy check information.

Terminal A has three candidate DRS transmission modes, which are respectively referred to as a first DRS transmission mode, a second DRS transmission mode, and a third DRS transmission mode. Preferably, the transmission mode of the demodulation reference signal includes at least one of the following or a combination thereof: the sequence used by the reference signal, the time-frequency resource used by the reference signal, and the pattern of the reference signal (as shown in FIG. 3 ).

If terminal A determines to use only the first transmission resource to send the data bit block to be transmitted, terminal A uses the first demodulation reference signal transmission mode to send a demodulator for demodulating the data bit block to be transmitted reference signal, and transmit the demodulation reference signal and the data bit block to be transmitted on the first transmission resource.

If terminal A determines to use the first transmission resource to transmit the data bit block to be transmitted, and uses the second transmission resource to transmit the redundant data bit block by means of spreading and single precoding, then terminal A uses the The second demodulation reference signal transmission mode transmits the demodulation reference signal used to demodulate the data bit block to be transmitted, and transmits the demodulation reference signal and the data bit block to be transmitted on the first transmission resource block, and transmit the redundant data bit block on the second transmission resource by means of spectrum spreading and single precoding.

If terminal A determines to use the first sending resource to send the data bit block to be transmitted, and uses the second sending resource to send the redundant data bit block through open-loop precoding, then terminal A uses the first sending a demodulation reference signal for demodulating the data bit block to be transmitted in the three demodulation reference signal transmission mode, and sending the demodulation reference signal and the data bit block to be transmitted on the first transmission resource, The redundant data bit block is transmitted on the second transmission resource by means of spectrum spreading and open-loop precoding.

The base station receives the demodulation reference signal on the first transmission resource, determines the transmission mode of the demodulation reference signal, and if the base station successfully decodes the data bit block to be transmitted on the first transmission resource, the base station feeds back reception success information For terminal A; if the base station fails to decode the data bit block to be transmitted on the first transmission resource, the base station determines whether there is the redundant data bit block sent by terminal A on the second transmission resource, if not, Then the base station feeds back reception failure information to terminal A, if there is, then the base station uses all or part of the received redundant data bit blocks and the received data bit blocks to be transmitted to try whether the data to be transmitted can be successfully decoded If the bit block is successfully decoded, the base station feeds back reception success information to terminal A, and if the decoding fails, the base station feeds back reception failure information to terminal A.

After receiving the reception failure information fed back by the base station, the terminal A divides the data bit block to be transmitted into T segmented data bit blocks, and then XORs the bits of the T segmented data bit blocks Operation (for example, 2 segmented data bit blocks, respectively 1111 and 1011, 0100 after XOR), to obtain a retransmission redundant data bit block, terminal A transmits all data on the third transmission resource allocated by the base station The retransmission of redundant data bit blocks, wherein the length of the third transmission resource in the time domain is smaller than the length of the first transmission resource in the time domain, and the subcarriers of the third transmission resource in the frequency domain The interval is four times the subcarrier interval of the first transmission resource in the frequency domain, and the purpose of doing this is to reduce the data transmission delay.

After receiving the retransmitted redundant data bit block, the base station processes the retransmitted redundant data bit block with the previously received to-be-transmitted data bit-block, and determines whether the to-be-transmitted data can be successfully received bit blocks.

Example 2

The base station allocates the first transmission resource and the second transmission resource to the terminal A, wherein the first transmission resource is exclusively occupied by the terminal A, and the second transmission resource is shared by the terminal A and other terminals A. Preferably, as shown in FIG. 2 , the number of frequency domain subcarriers of the second transmission resource is smaller than the number of frequency domain subcarriers of the first transmission resource, and the time domain length of the second transmission resource is greater than the The length of the time domain of the first transmission resource, the second transmission resource and the first transmission resource are continuous in the time domain, and the second transmission resource is located behind the first transmission resource.

Terminal A generates a data bit block with a length of 100 to be transmitted, and extracts 25 bits at equal intervals from the data bit block to be transmitted to generate a redundant data bit block, and the data bit block to be transmitted contains a 4-bit cyclic redundancy check information.

Terminal A has three candidate DRS transmission modes, which are respectively referred to as a first DRS transmission mode, a second DRS transmission mode, and a third DRS transmission mode. Preferably, the transmission mode of the demodulation reference signal includes at least one of the following or a combination thereof: a sequence used by the reference signal, a time-frequency resource used by the reference signal, and a pattern of the reference signal.

If terminal A does not retransmit data during the previous process of sending data to the base station, terminal A uses the first demodulation reference signal transmission mode to send a demodulation reference signal for demodulating the data bit block to be transmitted, and Sending the demodulation reference signal and the data bit block to be transmitted on the first sending resource.

The base station receives the demodulation reference signal on the first transmission resource, determines the transmission mode of the demodulation reference signal, and the base station successfully decodes the data bit block to be transmitted on the first transmission resource, and then the base station feeds back successful reception information to Terminal A.

Example 3

The base station allocates the first transmission resource and the second transmission resource to the terminal A, wherein the first transmission resource is exclusively occupied by the terminal A, and the second transmission resource is shared by the terminal A and other terminals A. Preferably, as shown in FIG. 2 , the number of frequency domain subcarriers of the second transmission resource is smaller than the number of frequency domain subcarriers of the first transmission resource, and the time domain length of the second transmission resource is greater than the The length of the time domain of the first transmission resource, the second transmission resource and the first transmission resource are continuous in the time domain, and the second transmission resource is located after the first transmission resource.

Terminal A generates a data bit block with a length of 100 to be transmitted, and extracts 25 bits at equal intervals from the data bit block to be transmitted to generate a redundant data bit block, and the data bit block to be transmitted contains a 4-bit cyclic redundancy check information.

Terminal A has three candidate DRS transmission modes, which are respectively referred to as a first DRS transmission mode, a second DRS transmission mode, and a third DRS transmission mode. Preferably, the transmission mode of the demodulation reference signal includes at least one of the following or a combination thereof: a sequence used by the reference signal, a time-frequency resource used by the reference signal, and a pattern of the reference signal.

If terminal A retransmits data during the previous process of sending data to the base station, and terminal A measures the correlation time of the channel according to the measurement reference signal sent by the base station to be greater than 0.5ms, then terminal A uses the second demodulation reference signal transmission mode sending a demodulation reference signal for demodulating the data bit block to be transmitted, and sending the demodulation reference signal and the data bit block to be transmitted on the first transmission resource, and sending the demodulation reference signal and the data bit block to be transmitted on the second transmission resource The redundant data bit block is transmitted in a manner of spreading spectrum and single precoding. Preferably, the single precoding mode means that the second communication node uses the same precoding matrix for data transmission on each subcarrier of the second transmission resource.

The base station receives the demodulation reference signal on the first transmission resource, determines the transmission mode of the demodulation reference signal, and if the base station successfully decodes the data bit block to be transmitted on the first transmission resource, the base station feeds back reception success information For terminal A; if the base station fails to decode the data bit block to be transmitted on the first transmission resource, the base station determines whether there is the redundant data bit block sent by terminal A on the second transmission resource, if not, Then the base station feeds back reception failure information to terminal A, if there is, then the base station uses all or part of the received redundant data bit blocks and the received data bit blocks to be transmitted to try whether the data to be transmitted can be successfully decoded If the bit block is successfully decoded, the base station feeds back reception success information to terminal A, and if the decoding fails, the base station feeds back reception failure information to terminal A.

After receiving the reception failure information fed back by the base station, the terminal A divides the data bit block to be transmitted into T segmented data bit blocks, and then XORs the bits of the T segmented data bit blocks Operation (for example, 2 segmented data bit blocks, respectively 1111 and 1011, 0100 after XOR), to obtain a retransmission redundant data bit block, terminal A transmits all data on the third transmission resource allocated by the base station The retransmission of redundant data bit blocks, wherein the length of the third transmission resource in the time domain is smaller than the length of the first transmission resource in the time domain, and the subcarriers of the third transmission resource in the frequency domain The interval is four times the subcarrier interval of the first transmission resource in the frequency domain, and the purpose of doing this is to reduce the data transmission delay.

After receiving the retransmitted redundant data bit block, the base station processes the retransmitted redundant data bit block with the previously received to-be-transmitted data bit-block, and determines whether the to-be-transmitted data can be successfully received bit blocks.

Example 4

The base station allocates the first transmission resource and the second transmission resource to the terminal A, wherein the first transmission resource is exclusively occupied by the terminal A, and the second transmission resource is shared by the terminal A and other terminals A. Preferably, as shown in FIG. 2 , the number of frequency domain subcarriers of the second transmission resource is smaller than the number of frequency domain subcarriers of the first transmission resource, and the time domain length of the second transmission resource is greater than the The length of the time domain of the first transmission resource, the second transmission resource and the first transmission resource are continuous in the time domain, and the second transmission resource is located behind the first transmission resource.

Terminal A generates a data bit block with a length of 100 to be transmitted, and extracts 25 bits at equal intervals from the data bit block to be transmitted to generate a redundant data bit block, and the data bit block to be transmitted contains a 4-bit cyclic redundancy check information.

Terminal A has three candidate DRS transmission modes, which are respectively referred to as a first DRS transmission mode, a second DRS transmission mode, and a third DRS transmission mode. Preferably, the transmission mode of the demodulation reference signal includes at least one of the following or a combination thereof: a sequence used by the reference signal, a time-frequency resource used by the reference signal, and a pattern of the reference signal.

If terminal A retransmits data in the process of sending data to the base station (for example, based on the statistics of whether retransmission occurred during the previous 5 data transmissions), and terminal A measures the channel according to the measurement reference signal sent by the base station The correlation time is less than or equal to 0.5ms, then terminal A uses the third demodulation reference signal transmission mode to send the demodulation reference signal used to demodulate the data bit block to be transmitted, and send it on the first transmission resource The demodulation reference signal and the data bit block to be transmitted are used to transmit the redundant data bit block on the second transmission resource by means of spectrum spreading and open-loop precoding. Preferably, the open-loop precoding mode refers to that the terminal A alternately uses a predefined set of precoding matrices for data transmission on the subcarriers of the second transmission resource, and the predefined set of precoding matrices and The sequence used by the demodulation reference signal has a mapping relationship, for example, sequence A corresponds to precoding matrix group A, and sequence B corresponds to precoding matrix group B.

The base station receives the demodulation reference signal on the first transmission resource, determines the transmission mode of the demodulation reference signal, and if the base station successfully decodes the data bit block to be transmitted on the first transmission resource, the base station feeds back reception success information For terminal A; if the base station fails to decode the data bit block to be transmitted on the first transmission resource, the base station determines whether there is the redundant data bit block sent by terminal A on the second transmission resource, if not, Then the base station feeds back reception failure information to terminal A, if there is, then the base station uses all or part of the received redundant data bit blocks and the received data bit blocks to be transmitted to try whether the data to be transmitted can be successfully decoded If the bit block is successfully decoded, the base station feeds back reception success information to terminal A, and if the decoding fails, the base station feeds back reception failure information to terminal A.

After receiving the reception failure information fed back by the base station, the terminal A divides the data bit block to be transmitted into T segmented data bit blocks, and then XORs the bits of the T segmented data bit blocks Operation (for example, 2 segmented data bit blocks, respectively 1111 and 1011, 0100 after XOR), to obtain a retransmission redundant data bit block, terminal A transmits all data on the third transmission resource allocated by the base station The retransmission of redundant data bit blocks, wherein the length of the third transmission resource in the time domain is smaller than the length of the first transmission resource in the time domain, and the subcarriers of the third transmission resource in the frequency domain The interval is four times the subcarrier interval of the first transmission resource in the frequency domain, and the purpose of doing this is to reduce the data transmission delay.

After receiving the retransmitted redundant data bit block, the base station processes the retransmitted redundant data bit block with the previously received to-be-transmitted data bit-block, and determines whether the to-be-transmitted data can be successfully received bit blocks.

Example 5

The base station allocates the first transmission resource and the second transmission resource to the terminal A, wherein the first transmission resource is exclusively occupied by the terminal A, and the second transmission resource is shared by the terminal A and other terminals A. Preferably, as shown in FIG. 2 , the number of frequency domain subcarriers of the second transmission resource is smaller than the number of frequency domain subcarriers of the first transmission resource, and the time domain length of the second transmission resource is greater than the The length of the time domain of the first transmission resource, the second transmission resource and the first transmission resource are continuous in the time domain, and the second transmission resource is located after the first transmission resource.

Terminal A generates a data bit block with a length of 100 to be transmitted, and extracts 25 bits at equal intervals from the data bit block to be transmitted to generate a redundant data bit block, and the data bit block to be transmitted contains a 4-bit cyclic redundancy check information.

Terminal A has three candidate DRS transmission modes, which are respectively referred to as a first DRS transmission mode, a second DRS transmission mode, and a third DRS transmission mode. Preferably, the transmission mode of the demodulation reference signal includes at least one of the following or a combination thereof: a sequence used by the reference signal, a time-frequency resource used by the reference signal, and a pattern of the reference signal.

If the signal-to-interference-noise ratio obtained by terminal A by measuring the measurement reference signal sent by the base station is lower than 20dB, and the correlation time of the channel measured by the second communication node according to the measurement reference signal sent by the base station is greater than 0.5ms, then terminal A uses the The second demodulation reference signal transmission mode transmits the demodulation reference signal used to demodulate the data bit block to be transmitted, and transmits the demodulation reference signal and the data bit block to be transmitted on the first transmission resource block, and transmit the redundant data bit block on the second transmission resource by means of spectrum spreading and single precoding. Preferably, the single precoding mode means that the second communication node uses the same precoding matrix for data transmission on each subcarrier of the second transmission resource.

The base station receives the demodulation reference signal on the first transmission resource, determines the transmission mode of the demodulation reference signal, and if the base station successfully decodes the data bit block to be transmitted on the first transmission resource, the base station feeds back reception success information For terminal A; if the base station fails to decode the data bit block to be transmitted on the first transmission resource, the base station determines whether there is the redundant data bit block sent by terminal A on the second transmission resource, if not, Then the base station feeds back reception failure information to terminal A, if there is, then the base station uses all or part of the received redundant data bit blocks and the received data bit blocks to be transmitted to try whether the data to be transmitted can be successfully decoded If the bit block is successfully decoded, the base station feeds back reception success information to terminal A, and if the decoding fails, the base station feeds back reception failure information to terminal A.

After receiving the reception failure information fed back by the base station, the terminal A divides the data bit block to be transmitted into T segmented data bit blocks, and then XORs the bits of the T segmented data bit blocks Operation (for example, 2 segmented data bit blocks, respectively 1111 and 1011, 0100 after XOR), to obtain a retransmission redundant data bit block, terminal A transmits all data on the third transmission resource allocated by the base station The retransmission of redundant data bit blocks, wherein the length of the third transmission resource in the time domain is smaller than the length of the first transmission resource in the time domain, and the subcarriers of the third transmission resource in the frequency domain The interval is four times the subcarrier interval of the first transmission resource in the frequency domain, and the purpose of doing this is to reduce the data transmission delay.

After receiving the retransmitted redundant data bit block, the base station processes the retransmitted redundant data bit block with the previously received to-be-transmitted data bit-block, and determines whether the to-be-transmitted data can be successfully received bit blocks.

Example 6

The base station allocates the first transmission resource and the second transmission resource to the terminal A, wherein the first transmission resource is exclusively occupied by the terminal A, and the second transmission resource is shared by the terminal A and other terminals A. Preferably, as shown in FIG. 2 , the number of frequency domain subcarriers of the second transmission resource is smaller than the number of frequency domain subcarriers of the first transmission resource, and the time domain length of the second transmission resource is greater than the The length of the time domain of the first transmission resource, the second transmission resource and the first transmission resource are continuous in the time domain, and the second transmission resource is located after the first transmission resource.

Terminal A generates a data bit block with a length of 100 to be transmitted, and extracts 25 bits at equal intervals from the data bit block to be transmitted to generate a redundant data bit block, and the data bit block to be transmitted contains a 4-bit cyclic redundancy check information.

Terminal A has three candidate DRS transmission modes, which are respectively referred to as a first DRS transmission mode, a second DRS transmission mode, and a third DRS transmission mode. Preferably, the transmission mode of the demodulation reference signal includes at least one of the following or a combination thereof: a sequence used by the reference signal, a time-frequency resource used by the reference signal, and a pattern of the reference signal.

If the signal-to-interference-noise ratio obtained by terminal A by measuring the measurement reference signal sent by the base station is lower than 20dB, and the correlation time of the channel measured by the second communication node according to the measurement reference signal sent by the base station is less than or equal to 0.5ms, then terminal A uses The third demodulation reference signal transmission mode transmits a demodulation reference signal used to demodulate the data bit block to be transmitted, and transmits the demodulation reference signal and the data to be transmitted on the first transmission resource The bit block is used to transmit the redundant data bit block on the second transmission resource by means of spectrum spreading and open-loop precoding. Preferably, the open-loop precoding mode refers to that the terminal A alternately uses a predefined set of precoding matrices for data transmission on the subcarriers of the second transmission resource, and the predefined set of precoding matrices and The sequence used by the demodulation reference signal has a mapping relationship, for example, sequence A corresponds to precoding matrix group A, and sequence B corresponds to precoding matrix group B.

The base station receives the demodulation reference signal on the first transmission resource, determines the transmission mode of the demodulation reference signal, and if the base station successfully decodes the data bit block to be transmitted on the first transmission resource, the base station feeds back reception success information For terminal A; if the base station fails to decode the data bit block to be transmitted on the first transmission resource, the base station determines whether there is the redundant data bit block sent by terminal A on the second transmission resource, if not, Then the base station feeds back reception failure information to terminal A, if there is, then the base station uses all or part of the received redundant data bit blocks and the received data bit blocks to be transmitted to try whether the data to be transmitted can be successfully decoded If the bit block is successfully decoded, the base station feeds back reception success information to terminal A, and if the decoding fails, the base station feeds back reception failure information to terminal A.

After receiving the reception failure information fed back by the base station, the terminal A divides the data bit block to be transmitted into T segmented data bit blocks, and then XORs the bits of the T segmented data bit blocks Operation (for example, 2 segmented data bit blocks, respectively 1111 and 1011, 0100 after XOR), to obtain a retransmission redundant data bit block, terminal A transmits all data on the third transmission resource allocated by the base station The retransmission of redundant data bit blocks, wherein the length of the third transmission resource in the time domain is smaller than the length of the first transmission resource in the time domain, and the subcarriers of the third transmission resource in the frequency domain The interval is four times the subcarrier interval of the first transmission resource in the frequency domain, and the purpose of doing this is to reduce the data transmission delay.

After receiving the retransmitted redundant data bit block, the base station processes the retransmitted redundant data bit block with the previously received to-be-transmitted data bit-block, and determines whether the to-be-transmitted data can be successfully received bit blocks.

Example 7

The base station allocates the first transmission resource and the second transmission resource to the terminal A, wherein the first transmission resource is exclusively occupied by the terminal A, and the second transmission resource is shared by the terminal A and other terminals A. Preferably, as shown in FIG. 2 , the number of frequency domain subcarriers of the second transmission resource is smaller than the number of frequency domain subcarriers of the first transmission resource, and the time domain length of the second transmission resource is greater than the The length of the time domain of the first transmission resource, the second transmission resource and the first transmission resource are continuous in the time domain, and the second transmission resource is located behind the first transmission resource.

Terminal A generates a data bit block with a length of 100 to be transmitted, and extracts 25 bits at equal intervals from the data bit block to be transmitted to generate a redundant data bit block, and the data bit block to be transmitted contains a 4-bit cyclic redundancy check information.

Terminal A has three candidate DRS transmission modes, which are respectively referred to as a first DRS transmission mode, a second DRS transmission mode, and a third DRS transmission mode. Preferably, the transmission mode of the demodulation reference signal includes at least one of the following or a combination thereof: a sequence used by the reference signal, a time-frequency resource used by the reference signal, and a pattern of the reference signal.

If terminal A determines to use only the first transmission resource to send the data bit block to be transmitted, terminal A uses the first demodulation reference signal transmission mode to send a demodulator for demodulating the data bit block to be transmitted reference signal, and transmit the demodulation reference signal and the data bit block to be transmitted on the first transmission resource.

If terminal A determines to use the first transmission resource to transmit the data bit block to be transmitted, and uses the second transmission resource to transmit the redundant data bit block by means of spreading and single precoding, then terminal A uses the The second demodulation reference signal transmission mode transmits the demodulation reference signal used to demodulate the data bit block to be transmitted, and transmits the demodulation reference signal and the data bit block to be transmitted on the first transmission resource block, and transmit the redundant data bit block on the second transmission resource by means of spectrum spreading and single precoding. Preferably, the spreading sequence used by terminal A is notified by the base station through signaling. If the total number of subcarriers contained in the second transmission resource is greater than 256, the spreading sequence is a pseudo-random sequence. If the second If the total number of subcarriers included in the transmission resource is less than or equal to 256, the spreading sequence is a Walsh sequence. Preferably, the transmit power of terminal A on each subcarrier of the second transmission resource is greater than the transmit power of each subcarrier on the first transmission resource by more than 3dB, or greater than log2 (the subcarrier of the second transmission resource The total number of carriers/the total number of subcarriers of the first transmission resource) dB or more.

If terminal A determines to use the first sending resource to send the data bit block to be transmitted, and uses the second sending resource to send the redundant data bit block through open-loop precoding, then terminal A uses the first sending a demodulation reference signal for demodulating the data bit block to be transmitted in the three demodulation reference signal transmission mode, and sending the demodulation reference signal and the data bit block to be transmitted on the first transmission resource, The redundant data bit block is transmitted on the second transmission resource by means of spectrum spreading and open-loop precoding. Preferably, the spreading sequence used by terminal A is notified by the base station through signaling. If the total number of subcarriers contained in the second transmission resource is greater than 256, the spreading sequence is a pseudo-random sequence. If the second If the total number of subcarriers included in the transmission resource is less than or equal to 256, the spreading sequence is a Walsh sequence. Preferably, the transmit power of terminal A on each subcarrier of the second transmission resource is greater than the transmit power of each subcarrier on the first transmission resource by more than 3dB, or greater than log2 (the subcarrier of the second transmission resource The total number of carriers/the total number of subcarriers of the first transmission resource) dB or more.

The base station receives the demodulation reference signal on the first transmission resource, determines the transmission mode of the demodulation reference signal, and if the base station successfully decodes the data bit block to be transmitted on the first transmission resource, the base station feeds back reception success information For terminal A; if the base station fails to decode the data bit block to be transmitted on the first transmission resource, the base station determines whether there is the redundant data bit block sent by terminal A on the second transmission resource, if not, Then the base station feeds back reception failure information to terminal A, if there is, then the base station uses all or part of the received redundant data bit blocks and the received data bit blocks to be transmitted to try whether the data to be transmitted can be successfully decoded If the bit block is successfully decoded, the base station feeds back reception success information to terminal A, and if the decoding fails, the base station feeds back reception failure information to terminal A.

After receiving the reception failure information fed back by the base station, the terminal A divides the data bit block to be transmitted into T segmented data bit blocks, and then XORs the bits of the T segmented data bit blocks Operation (for example, 2 segmented data bit blocks, respectively 1111 and 1011, 0100 after XOR), to obtain a retransmission redundant data bit block, terminal A transmits all data on the third transmission resource allocated by the base station The retransmission of redundant data bit blocks, wherein the length of the third transmission resource in the time domain is smaller than the length of the first transmission resource in the time domain, and the subcarriers of the third transmission resource in the frequency domain The interval is four times the subcarrier interval of the first transmission resource in the frequency domain, and the purpose of doing this is to reduce the data transmission delay.

After receiving the retransmitted redundant data bit block, the base station processes the retransmitted redundant data bit block with the previously received to-be-transmitted data bit-block, and determines whether the to-be-transmitted data can be successfully received bit blocks.

Example 8

The base station allocates the first transmission resource and the second transmission resource to the terminal A, wherein the first transmission resource is exclusively occupied by the terminal A, and the second transmission resource is shared by the terminal A and other terminals A. Preferably, as shown in FIG. 2 , the number of frequency domain subcarriers of the second transmission resource is smaller than the number of frequency domain subcarriers of the first transmission resource, and the time domain length of the second transmission resource is greater than the The length of the time domain of the first transmission resource, the second transmission resource and the first transmission resource are continuous in the time domain, and the second transmission resource is located after the first transmission resource.

Terminal A generates a data bit block with a length of 100 to be transmitted, and extracts 25 bits at equal intervals from the data bit block to be transmitted to generate a redundant data bit block, and the data bit block to be transmitted contains a 4-bit cyclic redundancy check information.

Terminal A has three candidate DRS transmission modes, which are respectively referred to as a first DRS transmission mode, a second DRS transmission mode, and a third DRS transmission mode. Preferably, the transmission mode of the demodulation reference signal includes at least one of the following or a combination thereof: the sequence used by the reference signal, the time-frequency resource used by the reference signal, and the pattern of the reference signal (as shown in FIG. 3 ).

If terminal A determines to use only the first transmission resource to send the data bit block to be transmitted, terminal A uses the first demodulation reference signal transmission mode to send a demodulator for demodulating the data bit block to be transmitted reference signal, and transmit the demodulation reference signal and the data bit block to be transmitted through a transmission beam BF-A on the first transmission resource.

If terminal A determines to use the first transmission resource to transmit the data bit block to be transmitted, and uses the second transmission resource to transmit the redundant data bit block by means of spreading and single precoding, then terminal A uses the The second demodulation reference signal transmission mode transmits the demodulation reference signal used to demodulate the data bit block to be transmitted, and transmits the demodulation reference signal and the data bit block to be transmitted on the first transmission resource block, using a transmission beam BF-B on the second transmission resource to transmit the redundant data bit block in a manner of spreading and single precoding.

If terminal A determines to use the first sending resource to send the data bit block to be transmitted, and uses the second sending resource to send the redundant data bit block through open-loop precoding, then terminal A uses the first sending a demodulation reference signal for demodulating the data bit block to be transmitted in the three demodulation reference signal transmission mode, and sending the demodulation reference signal and the data bit block to be transmitted on the first transmission resource, The redundant data bit block is transmitted on the second transmission resource by using a transmission beam BF-B in a manner of spreading and open-loop precoding.

The base station receives the demodulation reference signal on the first transmission resource, determines the transmission mode of the demodulation reference signal, and if the base station successfully decodes the data bit block to be transmitted on the first transmission resource, the base station feeds back reception success information For terminal A; if the base station fails to decode the data bit block to be transmitted on the first transmission resource, the base station determines whether there is the redundant data bit block sent by terminal A on the second transmission resource, if not, Then the base station feeds back reception failure information to terminal A, if there is, then the base station uses all or part of the received redundant data bit blocks and the received data bit blocks to be transmitted to try whether the data to be transmitted can be successfully decoded If the bit block is successfully decoded, the base station feeds back reception success information to terminal A, and if the decoding fails, the base station feeds back reception failure information to terminal A.

After receiving the reception failure information fed back by the base station, the terminal A divides the data bit block to be transmitted into T segmented data bit blocks, and then XORs the bits of the T segmented data bit blocks Operation (for example, 2 segmented data bit blocks, respectively 1111 and 1011, 0100 after XOR), to obtain a retransmission redundant data bit block, terminal A uses the third transmission resource allocated by the base station to send The beam BF-C transmits the retransmitted redundant data bit block, wherein the length of the third transmission resource in the time domain is smaller than the length of the first transmission resource in the time domain, and the third transmission resource is in The subcarrier spacing in the frequency domain is four times the subcarrier spacing of the first transmission resource in the frequency domain, and the purpose of doing this is to reduce the data transmission delay.

After receiving the retransmitted redundant data bit block, the base station processes the retransmitted redundant data bit block with the previously received to-be-transmitted data bit-block, and determines whether the to-be-transmitted data can be successfully received bit blocks.

Preferably, the beam coverage of the sending beam BF-B includes the beam coverage of the sending beam BF-A, and the beam coverage of the sending beam BF-C includes the beam coverage of the sending beam BF-B.

Preferably, the base station uses the receiving beams BF-D, BF-E, and BF-F to receive the content on the first transmission resource, the second transmission resource, and the fourth transmission resource respectively, and the beam coverage of the receiving beam BF-F includes receiving The beam coverage of the beam BF-E, the beam coverage of the receiving beam BF-E includes the beam coverage of the receiving beam BF-D.

Example 9

The base station allocates the first transmission resource and the second transmission resource to the terminal A, wherein the first transmission resource is exclusively occupied by the terminal A, and the second transmission resource is shared by the terminal A and other terminals A. Preferably, as shown in FIG. 2 , the number of frequency domain subcarriers of the second transmission resource is smaller than the number of frequency domain subcarriers of the first transmission resource, and the time domain length of the second transmission resource is greater than the The length of the time domain of the first transmission resource, the second transmission resource and the first transmission resource are continuous in the time domain, and the second transmission resource is located after the first transmission resource.

Terminal A generates a data bit block with a length of 100 to be transmitted, and extracts 25 bits at equal intervals from the data bit block to be transmitted to generate a redundant data bit block, and the data bit block to be transmitted contains a 4-bit cyclic redundancy check information.

Terminal A has three candidate DRS transmission modes, which are respectively referred to as a first DRS transmission mode, a second DRS transmission mode, and a third DRS transmission mode. Preferably, the transmission mode of the demodulation reference signal includes at least one of the following or a combination thereof: the sequence used by the reference signal, the time-frequency resource used by the reference signal, and the pattern of the reference signal (as shown in FIG. 3 ).

If terminal A determines to use only the first transmission resource to send the data bit block to be transmitted, terminal A uses the first demodulation reference signal transmission mode to send a demodulator for demodulating the data bit block to be transmitted reference signal, and transmit the demodulation reference signal and the data bit block to be transmitted on the first transmission resource.

If terminal A determines to use the first transmission resource to transmit the data bit block to be transmitted, and uses the second transmission resource to transmit the redundant data bit block by means of spreading and single precoding, then terminal A uses the The second demodulation reference signal transmission mode transmits the demodulation reference signal used to demodulate the data bit block to be transmitted, and transmits the demodulation reference signal and the data bit block to be transmitted on the first transmission resource block, and transmit the redundant data bit block on the second transmission resource by means of spectrum spreading and single precoding.

If terminal A determines to use the first sending resource to send the data bit block to be transmitted, and uses the second sending resource to send the redundant data bit block through open-loop precoding, then terminal A uses the first sending a demodulation reference signal for demodulating the data bit block to be transmitted in the three demodulation reference signal transmission mode, and sending the demodulation reference signal and the data bit block to be transmitted on the first transmission resource, The redundant data bit block is transmitted on the second transmission resource by means of spectrum spreading and open-loop precoding.

The base station receives the demodulation reference signal on the first transmission resource, determines the transmission mode of the demodulation reference signal, and if the base station successfully decodes the data bit block to be transmitted on the first transmission resource, the base station feeds back reception success information For terminal A; if the base station fails to decode the data bit block to be transmitted on the first transmission resource, the base station determines whether there is the redundant data bit block sent by terminal A on the second transmission resource, if not, Then the base station feeds back reception failure information to terminal A, if there is, then the base station uses all or part of the received redundant data bit blocks and the received data bit blocks to be transmitted to try whether the data to be transmitted can be successfully decoded If the bit block is successfully decoded, the base station feeds back reception success information to terminal A, and if the decoding fails, the base station feeds back reception failure information to terminal A.

After receiving the reception failure information fed back by the base station, the terminal A divides the data bit block to be transmitted into T segmented data bit blocks, and then XORs the bits of the T segmented data bit blocks Operation (for example, 2 segmented data bit blocks, respectively 1111 and 1011, 0100 after XOR), to obtain a retransmission redundant data bit block, terminal A transmits all data on the third transmission resource allocated by the base station The retransmission of redundant data bit blocks, wherein the length of the third transmission resource in the time domain is smaller than the length of the first transmission resource in the time domain, and the subcarriers of the third transmission resource in the frequency domain The interval is four times the subcarrier interval of the first transmission resource in the frequency domain, and the purpose of doing this is to reduce the data transmission delay.

After receiving the retransmitted redundant data bit block, the base station processes the retransmitted redundant data bit block with the previously received to-be-transmitted data bit-block, and determines whether the to-be-transmitted data can be successfully received bit blocks.

Preferably, if the base station fails to receive on the first transmission resource and determines that terminal A has not transmitted the redundant data bit block, the base station feeds back the reception failure information at a moment after the first transmission resource, if the base station The reception on the first transmission resource fails, and it is determined that the terminal A sends the redundant data bit block. As shown in FIG. 4, the base station receives the redundant After some bits of the remaining data bit block are merged with the previously received data bit block to be transmitted, it is judged whether the reception is successful or the reception fails, and then the reception success or reception failure information is fed back to terminal A. The advantage of this is that the terminal A knows whether the base station decodes successfully as early as possible, and then quickly determines whether a data retransmission operation is required.

Experimental results show that, using the method of the present invention, by flexibly using allocated resources according to changes in the channel environment for redundant data transmission, can effectively combat the harsh channel changes in high-frequency communications, and the reliability of data transmission can reach more than 99%. Greatly reduces data transfer latency.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (10)

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.