CN109660943B - Self-adaptive Internet of things data transmission method - Google Patents

Abstract

The invention provides a self-adaptive data transmission method for the Internet of things, and belongs to the field of wireless communication. The invention comprises the following steps: the base station sends first configuration information and a downlink channel state information reference signal CSI-RS1 to a terminal located at a geographic position X; the terminal receives the first configuration information; the base station sends second configuration information to the terminal; the terminal receives the second configuration information and sends data according to the second configuration information; if the transmission fails, the base station broadcasts the relay terminal, and the terminal transmits data to the base station through the relay terminal. The invention has the beneficial effects that: the problem of poor spectrum efficiency in the existing narrowband Internet of things is solved, and the capacity of the narrowband Internet of things system is improved.

Description

An Adaptive Data Transmission Method for the Internet of Things

technical field

The invention relates to the field of wireless communication, in particular to an adaptive data transmission method of the Internet of Things.

Background technique

5G will meet people's diverse business needs in various areas such as living, working, leisure, and transportation, even with ultra-high traffic in dense residential areas, offices, stadiums, open-air gatherings, subways, expressways, high-speed rail, and wide-area coverage It can also provide users with ultra-high-definition video, virtual reality, augmented reality, cloud desktop, online games and other extreme business experiences. At the same time, 5G will also penetrate into the Internet of Things and various industries, and integrate deeply with industrial facilities, medical equipment, transportation, etc. Everything is connected".

5G application scenarios can be divided into two categories, namely Mobile Broadband (MBB, Mobile Broadband) and Internet of Things (IoT, Internet of Things). Among them, the main technical requirement of mobile broadband access is high capacity, providing high data rate to meet the growing demand for data services. The Internet of Things is mainly driven by the needs of Machine Type Communication (MTC, Machine Type Communication), which can be further divided into two types, including low-rate Massive Machine Communication (MMC, Massive Machine Communication) and low-latency and highly reliable machine communication. Among them, for low-rate mass machine communication, massive nodes are accessed at a low rate, the transmitted data packets are usually small, and the interval time is relatively long, and the cost and power consumption of such nodes are usually very low; for low-latency Highly reliable machine communication is mainly for machine communication with high real-time and reliability requirements, such as real-time alarm, real-time monitoring, etc.

In the fifth-generation mobile communication system, one of the scenarios that needs to be studied is the reliable transmission of data in the narrowband Internet of Things under the TDD scenario. How to increase the spectral efficiency of the narrowband IoT system is an important issue to be solved urgently for the IoT system.

SUMMARY OF THE INVENTION

In order to solve the problem of low spectral efficiency in the narrowband Internet of Things in the prior art, the present invention provides an adaptive Internet of Things data transmission method.

The present invention comprises the following steps:

S1: The base station sends first configuration information and downlink channel state information reference signal CSI-RS1 to a terminal located at geographic location X, where the first configuration information at least includes: information on the number of receiving antennas of the base station;

S2: the terminal receives the first configuration information, and determines a channel state information vector H1 according to the downlink channel state reference signal CSI-RS1;

S3: The base station sends second configuration information to the terminal, where the second configuration information includes: configuration information of the downlink channel state information reference signal CSI-RS2, first shared resource information, second shared resource information, the The second sounding reference signal resource set information and the second sounding reference signal sequence set information corresponding to the second shared resource, the third shared resource information, the spread spectrum sequence set information when the data is sent using the third shared resource, the collision is too strong Instruct the information to send resource information;

S4: The terminal receives the second configuration information, and when the terminal has data to send, the terminal determines its current geographic location Y, and the terminal determines the current geographic location Y according to the downlink channel state information reference signal CSI-RS2 The configuration information determines the channel state information vector H2, and determines the data transmission mode according to the current geographic location Y or the channel state information vector H2;

S5: The terminal sends data in the order of the first shared resource, the second shared resource, and the third shared resource until the transmission is successful, if the terminal does not receive the base station after sending the data by using the third shared resource feedback successful reception information, the terminal sends the resource information according to the over-collision indication information and sends the over-collision indication information to the base station;

S6: the base station sends the D2D mode configuration information by broadcasting after receiving the over-collision indication information, and requires the terminal set supporting the D2D mode to enter the D2D working mode after receiving the D2D mode configuration information;

S7: After receiving the D2D mode configuration information, the terminal sending the excessive collision indication information determines a D2D resource for communicating with the terminal set, and the terminal sends data to the terminal set through the D2D resource;

S8: The relay terminal in the terminal set that has successfully received the data sends the data to the base station.

The present invention is further improved. In step S1, if the number M of the receiving antennas is greater than or equal to 128, the first configuration information further includes first sounding reference signal resource set information and first sounding reference signal sequence set information ;

In step S2, if the first configuration information includes the first sounding reference signal resource set information and the first sounding reference signal sequence set information, the terminal according to the first sounding reference signal resource set information determining a first sounding reference signal resource set, determining a first sounding reference signal sequence set according to the first sounding reference signal sequence set information, and the terminal selecting a first sounding reference signal resource from the first sounding reference signal resource set , select a first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and the terminal sends the first sounding reference signal on the first sounding reference signal resource sequence;

In step S3, the base station receives the first sounding reference signal sequence sent by the terminal, determines a first spatial fingerprint according to the first sounding reference signal sequence, and determines a second spatial fingerprint according to the second sounding reference signal sequence .

The present invention is further improved. In step S4, if the distance between the geographic location Y of the terminal and the geographic location X is less than or equal to 0.3 meters or the inner product of the channel state information vectors H1 and H2 is greater than or equal to 0.97, the terminal Use the first shared resource to send the data, if the distance between the geographic location Y of the terminal and the geographic location X is greater than 0.3 meters and less than or equal to 1 meter or the inner product of the channel state information vectors H1 and H2 is less than 0.97 and greater than or equal to 0.9, the terminal determines the second sounding reference signal resource according to the second sounding reference signal resource set information, and determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal is in the The second sounding reference signal sequence is sent on the second sounding reference signal resource, and the data is sent using the second shared resource; if the distance between the geographic location Y of the terminal and the geographic location X is greater than 1 meter or the channel If the inner product of the state information vectors H1 and H2 is less than 0.9, the terminal selects a spreading sequence from the set of spreading sequences to spread the data, and then uses the third shared resource to send the data.

The present invention is further improved, if the terminal uses the first shared resource to send data, the base station receives the data based on the first spatial fingerprint; if the terminal uses the second shared resource to send data, The base station then receives the data based on the second spatial fingerprint.

The present invention is further improved. In step S6, the terminal set does not include a relay terminal that needs to send its own data to the base station, and the available power of the relay terminal in the terminal set is greater than or equal to its maximum power 1/2; in step S8, the relay terminals in the terminal set that successfully receive the data form a terminal subset, and the relay terminals in the terminal subset are based on the formula Px=(2^power)* In CQI, the size of Px selects no more than Z relay terminals from the terminal subset to send the data to the base station, where power is the available power of the relay terminal, and CQI represents the relay terminal For the channel quality information with the base station, Z=round up (the number of bits of the data/64).

The present invention is further improved. The channel state information vectors H1 and H2 are both M*1-dimensional vectors, and M is the number of antennas.

The present invention makes a further improvement, the first sounding reference signal resource set is smaller than the second sounding reference signal resource set, the first sounding reference signal sequence set is smaller than the second sounding reference signal sequence set, and the first sounding reference signal sequence set is smaller than the second sounding reference signal sequence set. The shared resource and the second shared resource have the same size, and the length N of the spreading sequences in the spreading sequence set is greater than or equal to 2*M.

The present invention makes further improvements, and the size of the third shared resource is N times the size of the first shared resource.

The present invention makes a further improvement, the downlink channel state information reference signal CSI-RS2 is located before the second shared resource in the time domain, and the difference does not exceed 2ms; the second sounding reference signal resource is located in the time domain in the Before the second shared resource, the difference does not exceed 0.5ms.

The present invention is further improved. The data carries the identification information of the terminal. In step S5, the terminal uses full power to send the over-collision indication information, wherein the over-collision indication information is A sequence shared by multiple terminals; in step S8, the relay terminal that sends the data to the base station uses the same time-frequency resource to send the data to the base station.

Compared with the prior art, the present invention has the beneficial effects of overcoming the problem of poor spectral efficiency in the existing narrowband Internet of Things, and improving the capacity of the narrowband Internet of Things system; the base station can effectively monitor the terminal by acquiring the uplink channel of the terminal. Differentiate, thereby improving the spectral efficiency of the system; in transmission, use more robust shared resources to allow terminals to send data to achieve hierarchical data transmission.

Description of drawings

Fig. 1 is the flow chart of the method of the present invention;

FIG. 2 is a schematic diagram of the location relationship of shared resources.

Detailed ways

The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

As shown in Figure 1 and Figure 2, the present invention comprises the following steps:

S1: The base station sends first configuration information and downlink channel state information reference signal CSI-RS1 to a terminal located at geographic location X, where the first configuration information at least includes: information on the number of receiving antennas of the base station;

S2: the terminal receives the first configuration information, and determines a channel state information vector H1 according to the downlink channel state reference signal CSI-RS1;

S3: The base station sends second configuration information to the terminal, where the second configuration information includes: configuration information of the downlink channel state information reference signal CSI-RS2, first shared resource information, second shared resource information, the The second sounding reference signal resource set information and the second sounding reference signal sequence set information corresponding to the second shared resource, the third shared resource information, the spread spectrum sequence set information when the data is sent using the third shared resource, the collision is too strong Instruct the information to send resource information;

S4: The terminal receives the second configuration information, and when the terminal has data to send, the terminal determines its current geographic location Y, and the terminal determines the current geographic location Y according to the downlink channel state information reference signal CSI-RS2 The configuration information determines the channel state information vector H2, and determines the data transmission mode according to the current geographic location Y or the channel state information vector H2;

S5: The terminal sends data in the order of the first shared resource, the second shared resource, and the third shared resource until the transmission is successful, if the terminal does not receive the base station after sending the data by using the third shared resource feedback successful reception information, the terminal sends the resource information according to the over-collision indication information and sends the over-collision indication information to the base station;

S6: the base station sends the D2D mode configuration information by broadcasting after receiving the over-collision indication information, and requires the terminal set supporting the D2D mode to enter the D2D working mode after receiving the D2D mode configuration information;

S7: After receiving the D2D mode configuration information, the terminal sending the excessive collision indication information determines a D2D resource for communicating with the terminal set, and the terminal sends data to the terminal set through the D2D resource;

S8: The relay terminal in the terminal set that has successfully received the data sends the data to the base station.

The present invention will be described in detail below with reference to the embodiments.

Example 1:

The base station sends the first configuration information and the downlink channel state information reference signal CSI-RS1 to the terminal located at the geographic location X. The first configuration information at least includes: information on the number of receiving antennas of the base station, if the number M of receiving antennas is greater than or equal to 128, Then, the first configuration information further includes first sounding reference signal resource set information and first sounding reference signal sequence set information. It should be noted that the more the number of receiving antennas, the stronger the ability of the base station to distinguish terminals through spatial information, and the more available spatial fingerprint information, so that the base station can effectively distinguish terminals by obtaining the uplink channel of the terminal, thereby improving The spectral efficiency of the system.

The terminal receives the first configuration information, and determines the channel state information vector H1 according to the downlink channel state reference signal CSI-RS1. If the first configuration information includes the first sounding reference signal resource set information and the first sounding reference signal sequence set information, the terminal according to The first sounding reference signal resource set information determines the first sounding reference signal resource set, the first sounding reference signal sequence set is determined according to the first sounding reference signal sequence set information, and the terminal selects the first sounding reference signal from the first sounding reference signal resource set. The signal resource is to select the first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and the terminal sends the first sounding reference signal sequence on the first sounding reference signal resource.

The base station receives the first sounding reference signal sequence sent by the terminal, and determines the first spatial fingerprint according to the first sounding reference signal sequence.

The base station sends second configuration information to the terminal, where the second configuration information at least includes the configuration information of the downlink channel state information reference signal CSI-RS2, the first shared resource information, the second shared resource information, and the second sounding reference corresponding to the second shared resource Signal resource set information, second sounding reference signal sequence set information, third shared resource information, spread spectrum sequence set information when using the third shared resource to send data, and excessive collision indication information to send resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to let the base station fail to successfully receive the uplink data sent by each terminal if multiple terminals transmit data on the first shared resource and cause relatively large interference with each other. When the terminal performs data retransmission through the second shared resource and/or the third shared resource, the probability of data collision on the second shared resource and the third shared resource is reduced.

The terminal receives the second configuration information, and when the terminal has data to send, the terminal determines its geographic location Y, and the terminal receives the downlink channel state information reference signal CSI-RS2 according to the configuration information of the downlink channel state information reference signal CSI-RS2 to determine the channel state Information vector H2, if the distance between the terminal's geographic location Y and the geographic location X is less than or equal to 0.3 meters (it means that the terminal moves a very short distance during this time, it can be considered that the channel state information has not changed during this time) or the channel state The inner product of the information vectors H1 and H2 is greater than or equal to 0.97 (indicating that the current channel state information of the terminal is similar to the channel state information previously obtained based on CSI-RS1), then the terminal uses the first shared resource to send data. The distance of the geographic location X is greater than 0.3 meters and less than or equal to 1 meter (indicating that the terminal has moved some distance during this period, it can be considered that the channel state information may change during this period, so the terminal needs to re-send the sounding reference signal to let the base station Obtain the spatial fingerprint corresponding to the terminal) or the inner product of the channel state information vector H1 and H2 is less than 0.97 and greater than or equal to 0.9 (indicating that the current channel state information of the terminal and the channel state information previously obtained based on CSI-RS1 have some changes), then The terminal determines the second sounding reference signal resource according to the second sounding reference signal resource set information, determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and sends the second sounding reference signal on the second sounding reference signal resource. sequence, use the second shared resource to send data; if the distance between the geographical location Y of the terminal and the geographical location X is greater than 1 meter (indicating that the terminal has moved a relatively large distance during this period of time, its channel state information changes rapidly, and the base station It is very likely that the data sent by the terminal cannot be received by means of spatial fingerprints) or the inner product of the channel state information vector H1 and H2 is less than 0.9 (indicating that the current channel state information of the terminal and the previous channel state information based on CSI-RS1 have occurred. If there is a very large change, the base station may not be able to receive the data sent by the terminal through spatial fingerprinting), then the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data.

If the terminal does not receive the reception success information fed back by the base station after using the first shared resource to send data, the terminal determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the first sounding reference signal sequence on the second sounding reference signal resource. The second sounding reference signal sequence is used to transmit data using the second shared resource. If the terminal does not receive successful reception information fed back by the base station after using the second shared resource to send data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data. The advantage of this is to use a more robust shared resource to allow the terminal to send data, and to achieve hierarchical data transmission.

If the terminal uses the third shared resource to send data and does not receive the successful reception information fed back by the base station, this indicates that there may be multiple terminals sending data on the shared resource, and the interference between them is very large. Sending resource information Sending excessive collision indication information to the base station, it is hoped that the base station can use other methods to help the terminal transmit data and improve the spectral efficiency of the system. Preferably, the terminal must be a terminal supporting the D2D working mode.

The base station sends the D2D (Device to Device) mode configuration information by broadcasting after receiving the over-collision indication information, and requires the terminal set that supports the D2D mode to receive the D2D mode configuration information and enter the D2D working mode. The terminal that the base station sends its own data, the advantage of this is that the terminal that supports the D2D mode with unsuccessful data transmission can find the surrounding D2D terminal to help it transmit data to the base station, improve the probability of successful data reception, and then improve the spectral efficiency of the system.

After receiving the D2D mode configuration information, the terminal sending the excessive collision indication information determines the D2D resource for communicating with the terminal set, and the terminal sends data to the terminal set through the D2D resource.

Terminals in the terminal set that successfully receive data form a terminal subset, and the terminals in the terminal subset (referred to as relay terminals) select from the terminal subset according to the formula Px=(2^power)* The size of Px in CQI. More than Z relay terminals send data to the base station. The advantage of this is to allow relay terminals with more power to assist terminals to retransmit data as much as possible, to avoid terminals with low power from assisting other terminals to retransmit their own power after data retransmission. There is a problem, where power identifies the available power of the relay terminal, CQI represents the channel quality information between the relay terminal and the base station, and Z=round up (number of bits of data/64).

Example 2:

The base station sends the first configuration information and the downlink channel state information reference signal CSI-RS1 to the terminal located at the geographic location X. The first configuration information at least includes: information on the number of receiving antennas of the base station, if the number M of receiving antennas is greater than or equal to 128, Then, the first configuration information further includes first sounding reference signal resource set information and first sounding reference signal sequence set information. It should be noted that the more the number of receiving antennas, the stronger the ability of the base station to distinguish terminals through spatial information, and the more available spatial fingerprint information, so that the base station can effectively distinguish terminals by obtaining the uplink channel of the terminal, thereby improving The spectral efficiency of the system.

The terminal receives the first configuration information, and determines the channel state information vector H1 according to the downlink channel state reference signal CSI-RS1. If the first configuration information includes the first sounding reference signal resource set information and the first sounding reference signal sequence set information, the terminal according to The first sounding reference signal resource set information determines the first sounding reference signal resource set, the first sounding reference signal sequence set is determined according to the first sounding reference signal sequence set information, and the terminal selects the first sounding reference signal from the first sounding reference signal resource set. The signal resource is to select the first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and the terminal sends the first sounding reference signal sequence on the first sounding reference signal resource.

The base station receives the first sounding reference signal sequence sent by the terminal, and determines the first spatial fingerprint according to the first sounding reference signal sequence.

The base station sends second configuration information to the terminal, where the second configuration information at least includes the configuration information of the downlink channel state information reference signal CSI-RS2, the first shared resource information, the second shared resource information, and the second sounding reference corresponding to the second shared resource Signal resource set information, second sounding reference signal sequence set information, third shared resource information, spread spectrum sequence set information when using the third shared resource to send data, and excessive collision indication information to send resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to let the base station fail to successfully receive the uplink data sent by each terminal if multiple terminals transmit data on the first shared resource and cause relatively large interference with each other. When the terminal performs data retransmission through the second shared resource and/or the third shared resource, the probability of data collision on the second shared resource and the third shared resource is reduced.

The terminal receives the second configuration information, and when the terminal has data to send, the terminal determines its geographic location Y, and the terminal receives the downlink channel state information reference signal CSI-RS2 according to the configuration information of the downlink channel state information reference signal CSI-RS2 to determine the channel state Information vector H2, if the distance between the terminal's geographic location Y and the geographic location X is less than or equal to 0.3 meters (it means that the terminal moves a very short distance during this time, it can be considered that the channel state information has not changed during this time) or the channel state The inner product of the information vectors H1 and H2 is greater than or equal to 0.97 (indicating that the current channel state information of the terminal is similar to the channel state information previously obtained based on CSI-RS1), then the terminal uses the first shared resource to send data. The distance of the geographic location X is greater than 0.3 meters and less than or equal to 1 meter (indicating that the terminal has moved some distance during this period, it can be considered that the channel state information may change during this period, so the terminal needs to re-send the sounding reference signal to let the base station Obtain the spatial fingerprint corresponding to the terminal) or the inner product of the channel state information vector H1 and H2 is less than 0.97 and greater than or equal to 0.9 (indicating that the current channel state information of the terminal and the channel state information previously obtained based on CSI-RS1 have some changes), then The terminal determines the second sounding reference signal resource according to the second sounding reference signal resource set information, determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and sends the second sounding reference signal on the second sounding reference signal resource. sequence, use the second shared resource to send data; if the distance between the geographical location Y of the terminal and the geographical location X is greater than 1 meter (indicating that the terminal has moved a relatively large distance during this period of time, its channel state information changes rapidly, and the base station It is very likely that the data sent by the terminal cannot be received by means of spatial fingerprints) or the inner product of the channel state information vector H1 and H2 is less than 0.9 (indicating that the current channel state information of the terminal and the previous channel state information based on CSI-RS1 have occurred. If there is a very large change, the base station may not be able to receive the data sent by the terminal through spatial fingerprinting), then the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data. Preferably, both H1 and H2 are M*1-dimensional vectors, and the narrowband IoT terminal due to this assumption generally has only one receiving antenna due to the consideration of implementation cost.

If the terminal does not receive the reception success information fed back by the base station after using the first shared resource to send data, the terminal determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the first sounding reference signal sequence on the second sounding reference signal resource. The second sounding reference signal sequence is used to transmit data using the second shared resource. If the terminal does not receive successful reception information fed back by the base station after using the second shared resource to send data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data. The advantage of this is to use a more robust shared resource to allow the terminal to send data, and to achieve hierarchical data transmission.

If the terminal uses the third shared resource to send data and does not receive the successful reception information fed back by the base station, this indicates that there may be multiple terminals sending data on the shared resource, and the interference between them is very large. Sending resource information Sending excessive collision indication information to the base station, it is hoped that the base station can use other methods to help the terminal transmit data and improve the spectral efficiency of the system. Preferably, the terminal must be a terminal supporting the D2D working mode.

The base station sends the D2D (Device to Device) mode configuration information by broadcasting after receiving the over-collision indication information, and requires the terminal set that supports the D2D mode to receive the D2D mode configuration information and enter the D2D working mode. The terminal that the base station sends its own data, the advantage of this is that the terminal that supports the D2D mode with unsuccessful data transmission can find the surrounding D2D terminal to help it transmit data to the base station, improve the probability of successful data reception, and then improve the spectral efficiency of the system.

After receiving the D2D mode configuration information, the terminal sending the excessive collision indication information determines the D2D resource for communicating with the terminal set, and the terminal sends data to the terminal set through the D2D resource.

Terminals in the terminal set that successfully receive data form a terminal subset, and the terminals in the terminal subset (referred to as relay terminals) select from the terminal subset according to the formula Px=(2^power)* The size of Px in CQI. More than Z relay terminals send data to the base station. The advantage of this is to allow relay terminals with more power to assist terminals to retransmit data as much as possible, to avoid terminals with low power from assisting other terminals to retransmit their own power after data retransmission. There is a problem, where power identifies the available power of the relay terminal, CQI represents the channel quality information between the relay terminal and the base station, and Z=round up (number of bits of data/64).

Example 3:

The base station sends the first configuration information and the downlink channel state information reference signal CSI-RS1 to the terminal located at the geographic location X. The first configuration information at least includes: information on the number of receiving antennas of the base station, if the number M of receiving antennas is greater than or equal to 128, Then, the first configuration information further includes first sounding reference signal resource set information and first sounding reference signal sequence set information. It should be noted that the more the number of receiving antennas, the stronger the ability of the base station to distinguish terminals through spatial information, and the more available spatial fingerprint information, so that the base station can effectively distinguish terminals by obtaining the uplink channel of the terminal, thereby improving The spectral efficiency of the system.

The terminal receives the first configuration information, and determines the channel state information vector H1 according to the downlink channel state reference signal CSI-RS1. If the first configuration information includes the first sounding reference signal resource set information and the first sounding reference signal sequence set information, the terminal according to The first sounding reference signal resource set information determines the first sounding reference signal resource set, the first sounding reference signal sequence set is determined according to the first sounding reference signal sequence set information, and the terminal selects the first sounding reference signal from the first sounding reference signal resource set. The signal resource is to select the first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and the terminal sends the first sounding reference signal sequence on the first sounding reference signal resource.

The base station receives the first sounding reference signal sequence sent by the terminal, and determines the first spatial fingerprint according to the first sounding reference signal sequence.

The base station sends second configuration information to the terminal, where the second configuration information at least includes the configuration information of the downlink channel state information reference signal CSI-RS2, the first shared resource information, the second shared resource information, and the second sounding reference corresponding to the second shared resource Signal resource set information, second sounding reference signal sequence set information, third shared resource information, spread spectrum sequence set information when using the third shared resource to send data, and excessive collision indication information to send resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to let the base station fail to successfully receive the uplink data sent by each terminal if multiple terminals transmit data on the first shared resource and cause relatively large interference with each other. When the terminal performs data retransmission through the second shared resource and/or the third shared resource, the probability of data collision on the second shared resource and the third shared resource is reduced. Preferably, the first sounding reference signal resource set is smaller than the second sounding reference signal resource set, the first sounding reference signal sequence set is smaller than the second sounding reference signal sequence set, and the size of the first shared resource and the second shared resource are equal. The purpose is to reduce the problem that the base station cannot successfully receive data because the spatial fingerprints of multiple terminals are relatively similar due to the strong channel correlation when multiple terminals use the shared resources at the same time to generate data by increasing resources as much as possible.

The terminal receives the second configuration information, and when the terminal has data to send, the terminal determines its geographic location Y, and the terminal receives the downlink channel state information reference signal CSI-RS2 according to the configuration information of the downlink channel state information reference signal CSI-RS2 to determine the channel state Information vector H2, if the distance between the terminal's geographic location Y and the geographic location X is less than or equal to 0.3 meters (it means that the terminal moves a very short distance during this time, it can be considered that the channel state information has not changed during this time) or the channel state The inner product of the information vectors H1 and H2 is greater than or equal to 0.97 (indicating that the current channel state information of the terminal is similar to the channel state information previously obtained based on CSI-RS1), then the terminal uses the first shared resource to send data. The distance of the geographic location X is greater than 0.3 meters and less than or equal to 1 meter (indicating that the terminal has moved some distance during this period, it can be considered that the channel state information may change during this period, so the terminal needs to re-send the sounding reference signal to let the base station Obtain the spatial fingerprint corresponding to the terminal) or the inner product of the channel state information vector H1 and H2 is less than 0.97 and greater than or equal to 0.9 (indicating that the current channel state information of the terminal and the channel state information previously obtained based on CSI-RS1 have some changes), then The terminal determines the second sounding reference signal resource according to the second sounding reference signal resource set information, determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and sends the second sounding reference signal on the second sounding reference signal resource. sequence, use the second shared resource to send data; if the distance between the geographical location Y of the terminal and the geographical location X is greater than 1 meter (indicating that the terminal has moved a relatively large distance during this period of time, its channel state information changes rapidly, and the base station It is very likely that the data sent by the terminal cannot be received by means of spatial fingerprints) or the inner product of the channel state information vector H1 and H2 is less than 0.9 (indicating that the current channel state information of the terminal and the previous channel state information based on CSI-RS1 have occurred. If there is a very large change, the base station may not be able to receive the data sent by the terminal through spatial fingerprinting), then the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data.

If the terminal does not receive the reception success information fed back by the base station after using the first shared resource to send data, the terminal determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the first sounding reference signal sequence on the second sounding reference signal resource. The second sounding reference signal sequence is used to transmit data using the second shared resource. If the terminal does not receive successful reception information fed back by the base station after using the second shared resource to send data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data. The advantage of this is to use a more robust shared resource to allow the terminal to send data, and to achieve hierarchical data transmission.

If the terminal uses the third shared resource to send data and does not receive the successful reception information fed back by the base station, this indicates that there may be multiple terminals sending data on the shared resource, and the interference between them is very large. Sending resource information Sending excessive collision indication information to the base station, it is hoped that the base station can use other methods to help the terminal transmit data and improve the spectral efficiency of the system. Preferably, the terminal must be a terminal supporting the D2D working mode.

The base station sends the D2D (Device to Device) mode configuration information by broadcasting after receiving the over-collision indication information, and requires the terminal set that supports the D2D mode to receive the D2D mode configuration information and enter the D2D working mode. The terminal that the base station sends its own data, the advantage of this is that the terminal that supports the D2D mode with unsuccessful data transmission can find the surrounding D2D terminal to help it transmit data to the base station, improve the probability of successful data reception, and then improve the spectral efficiency of the system.

After receiving the D2D mode configuration information, the terminal sending the excessive collision indication information determines the D2D resource for communicating with the terminal set, and the terminal sends data to the terminal set through the D2D resource.

Terminals in the terminal set that successfully receive data form a terminal subset, and the terminals in the terminal subset (referred to as relay terminals) select from the terminal subset according to the formula Px=(2^power)* The size of Px in CQI. More than Z relay terminals send data to the base station. The advantage of this is to allow relay terminals with more power to assist terminals to retransmit data as much as possible, to avoid terminals with low power from assisting other terminals to retransmit their own power after data retransmission. There is a problem, where power identifies the available power of the relay terminal, CQI represents the channel quality information between the relay terminal and the base station, and Z=round up (number of bits of data/64).

Example 4:

The base station sends the first configuration information and the downlink channel state information reference signal CSI-RS1 to the terminal located at the geographic location X. The first configuration information at least includes: information on the number of receiving antennas of the base station, if the number M of receiving antennas is greater than or equal to 128, Then, the first configuration information further includes first sounding reference signal resource set information and first sounding reference signal sequence set information. It should be noted that the more the number of receiving antennas, the stronger the ability of the base station to distinguish terminals through spatial information, and the more available spatial fingerprint information, so that the base station can effectively distinguish terminals by obtaining the uplink channel of the terminal, thereby improving The spectral efficiency of the system.

The terminal receives the first configuration information, and determines the channel state information vector H1 according to the downlink channel state reference signal CSI-RS1. If the first configuration information includes the first sounding reference signal resource set information and the first sounding reference signal sequence set information, the terminal according to The first sounding reference signal resource set information determines the first sounding reference signal resource set, the first sounding reference signal sequence set is determined according to the first sounding reference signal sequence set information, and the terminal selects the first sounding reference signal from the first sounding reference signal resource set. The signal resource is to select the first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and the terminal sends the first sounding reference signal sequence on the first sounding reference signal resource.

The base station receives the first sounding reference signal sequence sent by the terminal, and determines the first spatial fingerprint according to the first sounding reference signal sequence.

The base station sends second configuration information to the terminal, where the second configuration information at least includes the configuration information of the downlink channel state information reference signal CSI-RS2, the first shared resource information, the second shared resource information, and the second sounding reference corresponding to the second shared resource Signal resource set information, second sounding reference signal sequence set information, third shared resource information, spread spectrum sequence set information when using the third shared resource to send data, and excessive collision indication information to send resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to let the base station fail to successfully receive the uplink data sent by each terminal if multiple terminals transmit data on the first shared resource and cause relatively large interference with each other. When the terminal performs data retransmission through the second shared resource and/or the third shared resource, the probability of data collision on the second shared resource and the third shared resource is reduced. Preferably, the length N of the spreading sequences in the spreading sequence set is greater than or equal to 2*M, the reason for this is that if the base station cannot successfully receive the first shared resource or the second shared resource through the M*1 dimensional spatial fingerprint The uplink data sent by multiple terminals at the same time indicates that the channel correlation between terminals is very strong, and a longer spreading sequence is needed to solve the interference problem between users.

The terminal receives the second configuration information, and when the terminal has data to send, the terminal determines its geographic location Y, and the terminal receives the downlink channel state information reference signal CSI-RS2 according to the configuration information of the downlink channel state information reference signal CSI-RS2 to determine the channel state Information vector H2, if the distance between the terminal's geographic location Y and the geographic location X is less than or equal to 0.3 meters (it means that the terminal moves a very short distance during this time, it can be considered that the channel state information has not changed during this time) or the channel state The inner product of the information vectors H1 and H2 is greater than or equal to 0.97 (indicating that the current channel state information of the terminal is similar to the channel state information previously obtained based on CSI-RS1), then the terminal uses the first shared resource to send data. The distance of the geographic location X is greater than 0.3 meters and less than or equal to 1 meter (indicating that the terminal has moved some distance during this period, it can be considered that the channel state information may change during this period, so the terminal needs to re-send the sounding reference signal to let the base station Obtain the spatial fingerprint corresponding to the terminal) or the inner product of the channel state information vector H1 and H2 is less than 0.97 and greater than or equal to 0.9 (indicating that the current channel state information of the terminal and the channel state information previously obtained based on CSI-RS1 have some changes), then The terminal determines the second sounding reference signal resource according to the second sounding reference signal resource set information, determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and sends the second sounding reference signal on the second sounding reference signal resource. sequence, use the second shared resource to send data; if the distance between the geographical location Y of the terminal and the geographical location X is greater than 1 meter (indicating that the terminal has moved a relatively large distance during this period of time, its channel state information changes rapidly, and the base station It is very likely that the data sent by the terminal cannot be received by means of spatial fingerprints) or the inner product of the channel state information vector H1 and H2 is less than 0.9 (indicating that the current channel state information of the terminal and the previous channel state information based on CSI-RS1 have occurred. If there is a very large change, the base station may not be able to receive the data sent by the terminal through spatial fingerprinting), then the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data.

If the terminal does not receive the reception success information fed back by the base station after using the first shared resource to send data, the terminal determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the first sounding reference signal sequence on the second sounding reference signal resource. The second sounding reference signal sequence is used to transmit data using the second shared resource. If the terminal does not receive successful reception information fed back by the base station after using the second shared resource to send data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data. The advantage of this is to use a more robust shared resource to allow the terminal to send data, and to achieve hierarchical data transmission.

If the terminal uses the third shared resource to send data and does not receive the successful reception information fed back by the base station, this indicates that there may be multiple terminals sending data on the shared resource, and the interference between them is very large. Sending resource information Sending excessive collision indication information to the base station, it is hoped that the base station can use other methods to help the terminal transmit data and improve the spectral efficiency of the system. Preferably, the terminal must be a terminal supporting the D2D working mode.

The base station sends the D2D (Device to Device) mode configuration information by broadcasting after receiving the over-collision indication information, and requires the terminal set that supports the D2D mode to receive the D2D mode configuration information and enter the D2D working mode. The terminal that the base station sends its own data, the advantage of this is that the terminal that supports the D2D mode with unsuccessful data transmission can find the surrounding D2D terminal to help it transmit data to the base station, improve the probability of successful data reception, and then improve the spectral efficiency of the system.

After receiving the D2D mode configuration information, the terminal sending the excessive collision indication information determines the D2D resource for communicating with the terminal set, and the terminal sends data to the terminal set through the D2D resource.

Terminals in the terminal set that successfully receive data form a terminal subset, and the terminals in the terminal subset (referred to as relay terminals) select from the terminal subset according to the formula Px=(2^power)* The size of Px in CQI. More than Z relay terminals send data to the base station. The advantage of this is to allow relay terminals with more power to assist terminals to retransmit data as much as possible, to avoid terminals with low power from assisting other terminals to retransmit their own power after data retransmission. There is a problem, where power identifies the available power of the relay terminal, CQI represents the channel quality information between the relay terminal and the base station, and Z=round up (number of bits of data/64).

Example 5:

The base station sends the first configuration information and the downlink channel state information reference signal CSI-RS1 to the terminal located at the geographic location X. The first configuration information at least includes: information on the number of receiving antennas of the base station, if the number M of receiving antennas is greater than or equal to 128, Then, the first configuration information further includes first sounding reference signal resource set information and first sounding reference signal sequence set information. It should be noted that the more the number of receiving antennas, the stronger the ability of the base station to distinguish terminals through spatial information, and the more available spatial fingerprint information, so that the base station can effectively distinguish terminals by obtaining the uplink channel of the terminal, thereby improving The spectral efficiency of the system.

The terminal receives the first configuration information, and determines the channel state information vector H1 according to the downlink channel state reference signal CSI-RS1. If the first configuration information includes the first sounding reference signal resource set information and the first sounding reference signal sequence set information, the terminal according to The first sounding reference signal resource set information determines the first sounding reference signal resource set, the first sounding reference signal sequence set is determined according to the first sounding reference signal sequence set information, and the terminal selects the first sounding reference signal from the first sounding reference signal resource set. The signal resource is to select the first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and the terminal sends the first sounding reference signal sequence on the first sounding reference signal resource.

The base station receives the first sounding reference signal sequence sent by the terminal, and determines the first spatial fingerprint according to the first sounding reference signal sequence.

The base station sends second configuration information to the terminal, where the second configuration information at least includes the configuration information of the downlink channel state information reference signal CSI-RS2, the first shared resource information, the second shared resource information, and the second sounding reference corresponding to the second shared resource Signal resource set information, second sounding reference signal sequence set information, third shared resource information, spread spectrum sequence set information when using the third shared resource to send data, and excessive collision indication information to send resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to let the base station fail to successfully receive the uplink data sent by each terminal if multiple terminals transmit data on the first shared resource and cause relatively large interference with each other. When the terminal performs data retransmission through the second shared resource and/or the third shared resource, the probability of data collision on the second shared resource and the third shared resource is reduced. Preferably, the size of the third shared resource is N times the size of the first shared resource. The reason for this is that the terminal needs to transmit data on the third shared resource by means of data spreading, so more shared resources are required.

The terminal receives the second configuration information, and when the terminal has data to send, the terminal determines its geographic location Y, and the terminal receives the downlink channel state information reference signal CSI-RS2 according to the configuration information of the downlink channel state information reference signal CSI-RS2 to determine the channel state Information vector H2, if the distance between the terminal's geographic location Y and the geographic location X is less than or equal to 0.3 meters (it means that the terminal moves a very short distance during this time, it can be considered that the channel state information has not changed during this time) or the channel state The inner product of the information vectors H1 and H2 is greater than or equal to 0.97 (indicating that the current channel state information of the terminal is similar to the channel state information previously obtained based on CSI-RS1), then the terminal uses the first shared resource to send data. The distance of the geographic location X is greater than 0.3 meters and less than or equal to 1 meter (indicating that the terminal has moved some distance during this period, it can be considered that the channel state information may change during this period, so the terminal needs to re-send the sounding reference signal to let the base station Obtain the spatial fingerprint corresponding to the terminal) or the inner product of the channel state information vector H1 and H2 is less than 0.97 and greater than or equal to 0.9 (indicating that the current channel state information of the terminal and the channel state information previously obtained based on CSI-RS1 have some changes), then The terminal determines the second sounding reference signal resource according to the second sounding reference signal resource set information, determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and sends the second sounding reference signal on the second sounding reference signal resource. sequence, use the second shared resource to send data; if the distance between the geographical location Y of the terminal and the geographical location X is greater than 1 meter (indicating that the terminal has moved a relatively large distance during this period of time, its channel state information changes rapidly, and the base station It is very likely that the data sent by the terminal cannot be received by means of spatial fingerprints) or the inner product of the channel state information vector H1 and H2 is less than 0.9 (indicating that the current channel state information of the terminal and the previous channel state information based on CSI-RS1 have occurred. If there is a very large change, the base station may not be able to receive the data sent by the terminal through spatial fingerprinting), then the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data.

If the terminal does not receive the reception success information fed back by the base station after using the first shared resource to send data, the terminal determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the first sounding reference signal sequence on the second sounding reference signal resource. The second sounding reference signal sequence is used to transmit data using the second shared resource. If the terminal does not receive successful reception information fed back by the base station after using the second shared resource to send data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data. The advantage of this is to use a more robust shared resource to allow the terminal to send data, and to achieve hierarchical data transmission.

If the terminal uses the third shared resource to send data and does not receive the successful reception information fed back by the base station, this indicates that there may be multiple terminals sending data on the shared resource, and the interference between them is very large. Sending resource information Sending excessive collision indication information to the base station, it is hoped that the base station can use other methods to help the terminal transmit data and improve the spectral efficiency of the system. Preferably, the terminal must be a terminal supporting the D2D working mode.

The base station sends the D2D (Device to Device) mode configuration information by broadcasting after receiving the over-collision indication information, and requires the terminal set that supports the D2D mode to receive the D2D mode configuration information and enter the D2D working mode. The terminal that the base station sends its own data, the advantage of this is that the terminal that supports the D2D mode with unsuccessful data transmission can find the surrounding D2D terminal to help it transmit data to the base station, improve the probability of successful data reception, and then improve the spectral efficiency of the system.

After receiving the D2D mode configuration information, the terminal sending the excessive collision indication information determines the D2D resource for communicating with the terminal set, and the terminal sends data to the terminal set through the D2D resource.

Terminals in the terminal set that successfully receive data form a terminal subset, and the terminals in the terminal subset (referred to as relay terminals) select from the terminal subset according to the formula Px=(2^power)* The size of Px in CQI. More than Z relay terminals send data to the base station. The advantage of this is to allow relay terminals with more power to assist terminals to retransmit data as much as possible, to avoid terminals with low power from assisting other terminals to retransmit their own power after data retransmission. There is a problem, where power identifies the available power of the relay terminal, CQI represents the channel quality information between the relay terminal and the base station, and Z=round up (number of bits of data/64).

Example 6:

The base station sends the first configuration information and the downlink channel state information reference signal CSI-RS1 to the terminal located at the geographic location X. The first configuration information at least includes: information on the number of receiving antennas of the base station, if the number M of receiving antennas is greater than or equal to 128, Then, the first configuration information further includes first sounding reference signal resource set information and first sounding reference signal sequence set information. It should be noted that the more the number of receiving antennas, the stronger the ability of the base station to distinguish terminals through spatial information, and the more available spatial fingerprint information, so that the base station can effectively distinguish terminals by obtaining the uplink channel of the terminal, thereby improving The spectral efficiency of the system.

The terminal receives the first configuration information, and determines the channel state information vector H1 according to the downlink channel state reference signal CSI-RS1. If the first configuration information includes the first sounding reference signal resource set information and the first sounding reference signal sequence set information, the terminal according to The first sounding reference signal resource set information determines the first sounding reference signal resource set, the first sounding reference signal sequence set is determined according to the first sounding reference signal sequence set information, and the terminal selects the first sounding reference signal from the first sounding reference signal resource set. The signal resource is to select the first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and the terminal sends the first sounding reference signal sequence on the first sounding reference signal resource.

The base station receives the first sounding reference signal sequence sent by the terminal, and determines the first spatial fingerprint according to the first sounding reference signal sequence.

The base station sends second configuration information to the terminal, where the second configuration information at least includes the configuration information of the downlink channel state information reference signal CSI-RS2, the first shared resource information, the second shared resource information, and the second sounding reference corresponding to the second shared resource Signal resource set information, second sounding reference signal sequence set information, third shared resource information, spread spectrum sequence set information when using the third shared resource to send data, and excessive collision indication information to send resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to let the base station fail to successfully receive the uplink data sent by each terminal if multiple terminals transmit data on the first shared resource and cause relatively large interference with each other. When the terminal performs data retransmission through the second shared resource and/or the third shared resource, the probability of data collision on the second shared resource and the third shared resource is reduced.

The terminal receives the second configuration information, and when the terminal has data to send, the terminal determines its geographic location Y, and the terminal receives the downlink channel state information reference signal CSI-RS2 according to the configuration information of the downlink channel state information reference signal CSI-RS2 to determine the channel state Information vector H2, if the distance between the terminal's geographic location Y and the geographic location X is less than or equal to 0.3 meters (it means that the terminal moves a very short distance during this time, it can be considered that the channel state information has not changed during this time) or the channel state The inner product of the information vectors H1 and H2 is greater than or equal to 0.97 (indicating that the current channel state information of the terminal is similar to the channel state information previously obtained based on CSI-RS1), then the terminal uses the first shared resource to send data. The distance of the geographic location X is greater than 0.3 meters and less than or equal to 1 meter (indicating that the terminal has moved some distance during this period, it can be considered that the channel state information may change during this period, so the terminal needs to re-send the sounding reference signal to let the base station Obtain the spatial fingerprint corresponding to the terminal) or the inner product of the channel state information vector H1 and H2 is less than 0.97 and greater than or equal to 0.9 (indicating that the current channel state information of the terminal and the channel state information previously obtained based on CSI-RS1 have some changes), then The terminal determines the second sounding reference signal resource according to the second sounding reference signal resource set information, determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and sends the second sounding reference signal on the second sounding reference signal resource. sequence, use the second shared resource to send data; if the distance between the geographical location Y of the terminal and the geographical location X is greater than 1 meter (indicating that the terminal has moved a relatively large distance during this period of time, its channel state information changes rapidly, and the base station It is very likely that the data sent by the terminal cannot be received by means of spatial fingerprints) or the inner product of the channel state information vector H1 and H2 is less than 0.9 (indicating that the current channel state information of the terminal and the previous channel state information based on CSI-RS1 have occurred. If there is a very large change, the base station may not be able to receive the data sent by the terminal through spatial fingerprinting), then the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data. Preferably, the identification information of the terminal is carried in the data. The reason for this is that the base station does not know which terminal is sending the information on the shared resource, so the specific terminal identification needs to be carried in the data.

If the terminal does not receive the reception success information fed back by the base station after using the first shared resource to send data, the terminal determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the first sounding reference signal sequence on the second sounding reference signal resource. The second sounding reference signal sequence is used to transmit data using the second shared resource. If the terminal does not receive successful reception information fed back by the base station after using the second shared resource to send data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data. The advantage of this is to use a more robust shared resource to allow the terminal to send data, and to achieve hierarchical data transmission.

If the terminal uses the third shared resource to send data and does not receive the successful reception information fed back by the base station, this indicates that there may be multiple terminals sending data on the shared resource, and the interference between them is very large. Sending resource information Sending excessive collision indication information to the base station, it is hoped that the base station can use other methods to help the terminal transmit data and improve the spectral efficiency of the system. Preferably, the terminal must be a terminal supporting the D2D working mode.

The base station sends the D2D (Device to Device) mode configuration information by broadcasting after receiving the over-collision indication information, and requires the terminal set that supports the D2D mode to receive the D2D mode configuration information and enter the D2D working mode. The terminal that the base station sends its own data, the advantage of this is that the terminal that supports the D2D mode with unsuccessful data transmission can find the surrounding D2D terminal to help it transmit data to the base station, improve the probability of successful data reception, and then improve the spectral efficiency of the system.

After receiving the D2D mode configuration information, the terminal sending the excessive collision indication information determines the D2D resource for communicating with the terminal set, and the terminal sends data to the terminal set through the D2D resource.

Terminals in the terminal set that successfully receive data form a terminal subset, and the terminals in the terminal subset (referred to as relay terminals) select from the terminal subset according to the formula Px=(2^power)* The size of Px in CQI. More than Z relay terminals send data to the base station. The advantage of this is to allow relay terminals with more power to assist terminals to retransmit data as much as possible, to avoid terminals with low power from assisting other terminals to retransmit their own power after data retransmission. There is a problem, where power identifies the available power of the relay terminal, CQI represents the channel quality information between the relay terminal and the base station, and Z=round up (number of bits of data/64).

Example 7:

The base station sends the first configuration information and the downlink channel state information reference signal CSI-RS1 to the terminal located at the geographic location X. The first configuration information at least includes: information on the number of receiving antennas of the base station, if the number M of receiving antennas is greater than or equal to 128, Then, the first configuration information further includes first sounding reference signal resource set information and first sounding reference signal sequence set information. It should be noted that the more the number of receiving antennas, the stronger the ability of the base station to distinguish terminals through spatial information, and the more available spatial fingerprint information, so that the base station can effectively distinguish terminals by obtaining the uplink channel of the terminal, thereby improving The spectral efficiency of the system.

The terminal receives the first configuration information, and determines the channel state information vector H1 according to the downlink channel state reference signal CSI-RS1. If the first configuration information includes the first sounding reference signal resource set information and the first sounding reference signal sequence set information, the terminal according to The first sounding reference signal resource set information determines the first sounding reference signal resource set, the first sounding reference signal sequence set is determined according to the first sounding reference signal sequence set information, and the terminal selects the first sounding reference signal from the first sounding reference signal resource set. The signal resource is to select the first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and the terminal sends the first sounding reference signal sequence on the first sounding reference signal resource.

The base station receives the first sounding reference signal sequence sent by the terminal, and determines the first spatial fingerprint according to the first sounding reference signal sequence.

The base station sends second configuration information to the terminal, where the second configuration information at least includes the configuration information of the downlink channel state information reference signal CSI-RS2, the first shared resource information, the second shared resource information, and the second sounding reference corresponding to the second shared resource Signal resource set information, second sounding reference signal sequence set information, third shared resource information, spread spectrum sequence set information when using the third shared resource to send data, and excessive collision indication information to send resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to let the base station fail to successfully receive the uplink data sent by each terminal if multiple terminals transmit data on the first shared resource and cause relatively large interference with each other. When the terminal performs data retransmission through the second shared resource and/or the third shared resource, the probability of data collision on the second shared resource and the third shared resource is reduced.

The terminal receives the second configuration information, and when the terminal has data to send, the terminal determines its geographic location Y, and the terminal receives the downlink channel state information reference signal CSI-RS2 according to the configuration information of the downlink channel state information reference signal CSI-RS2 to determine the channel state Information vector H2, if the distance between the terminal's geographic location Y and the geographic location X is less than or equal to 0.3 meters (it means that the terminal moves a very short distance during this time, it can be considered that the channel state information has not changed during this time) or the channel state The inner product of the information vectors H1 and H2 is greater than or equal to 0.97 (indicating that the current channel state information of the terminal is similar to the channel state information previously obtained based on CSI-RS1), then the terminal uses the first shared resource to send data. The distance of the geographic location X is greater than 0.3 meters and less than or equal to 1 meter (indicating that the terminal has moved some distance during this period, it can be considered that the channel state information may change during this period, so the terminal needs to re-send the sounding reference signal to let the base station Obtain the spatial fingerprint corresponding to the terminal) or the inner product of the channel state information vector H1 and H2 is less than 0.97 and greater than or equal to 0.9 (indicating that the current channel state information of the terminal and the channel state information previously obtained based on CSI-RS1 have some changes), then The terminal determines the second sounding reference signal resource according to the second sounding reference signal resource set information, determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and sends the second sounding reference signal on the second sounding reference signal resource. sequence, use the second shared resource to send data; if the distance between the geographical location Y of the terminal and the geographical location X is greater than 1 meter (indicating that the terminal has moved a relatively large distance during this period of time, its channel state information changes rapidly, and the base station It is very likely that the data sent by the terminal cannot be received by means of spatial fingerprints) or the inner product of the channel state information vector H1 and H2 is less than 0.9 (indicating that the current channel state information of the terminal and the previous channel state information based on CSI-RS1 have occurred. If there is a very large change, the base station may not be able to receive the data sent by the terminal through spatial fingerprinting), then the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data. Preferably, if the terminal uses the first shared resource to send data, the base station receives data based on the first spatial fingerprint; if the terminal uses the second shared resource to send data, the base station receives data based on the second spatial fingerprint, and the second spatial fingerprint is based on the base station. The obtained second sounding reference signal sequence is obtained. The reason for this is that when the number of antennas is relatively large, the channel information on multiple antennas is generally orthogonal, so these orthogonal channel information (spatial fingerprints) can be used to decode different The data sent by the terminal to the base station on the shared resources, thereby reducing the usage of resources and improving the spectral efficiency of the system.

If the terminal does not receive the reception success information fed back by the base station after using the first shared resource to send data, the terminal determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the first sounding reference signal sequence on the second sounding reference signal resource. The second sounding reference signal sequence is used to transmit data using the second shared resource. If the terminal does not receive successful reception information fed back by the base station after using the second shared resource to send data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data. The advantage of this is to use a more robust shared resource to allow the terminal to send data, and to achieve hierarchical data transmission.

If the terminal uses the third shared resource to send data and does not receive the successful reception information fed back by the base station, this indicates that there may be multiple terminals sending data on the shared resource, and the interference between them is very large. Sending resource information Sending excessive collision indication information to the base station, it is hoped that the base station can use other methods to help the terminal transmit data and improve the spectral efficiency of the system. Preferably, the terminal must be a terminal supporting the D2D working mode.

The base station sends the D2D (Device to Device) mode configuration information by broadcasting after receiving the over-collision indication information, and requires the terminal set that supports the D2D mode to receive the D2D mode configuration information and enter the D2D working mode. The terminal that the base station sends its own data, the advantage of this is that the terminal that supports the D2D mode with unsuccessful data transmission can find the surrounding D2D terminal to help it transmit data to the base station, improve the probability of successful data reception, and then improve the spectral efficiency of the system.

After receiving the D2D mode configuration information, the terminal sending the excessive collision indication information determines the D2D resource for communicating with the terminal set, and the terminal sends data to the terminal set through the D2D resource.

Terminals in the terminal set that successfully receive data form a terminal subset, and the terminals in the terminal subset (referred to as relay terminals) select from the terminal subset according to the formula Px=(2^power)* The size of Px in CQI. More than Z relay terminals send data to the base station. The advantage of this is to allow relay terminals with more power to assist terminals to retransmit data as much as possible, to avoid terminals with low power from assisting other terminals to retransmit their own power after data retransmission. There is a problem, where power identifies the available power of the relay terminal, CQI represents the channel quality information between the relay terminal and the base station, and Z=round up (number of bits of data/64).

Example 8:

The base station sends the first configuration information and the downlink channel state information reference signal CSI-RS1 to the terminal located at the geographic location X. The first configuration information at least includes: information on the number of receiving antennas of the base station, if the number M of receiving antennas is greater than or equal to 128, Then, the first configuration information further includes first sounding reference signal resource set information and first sounding reference signal sequence set information. It should be noted that the more the number of receiving antennas, the stronger the ability of the base station to distinguish terminals through spatial information, and the more available spatial fingerprint information, so that the base station can effectively distinguish terminals by obtaining the uplink channel of the terminal, thereby improving The spectral efficiency of the system.

The terminal receives the first configuration information, and determines the channel state information vector H1 according to the downlink channel state reference signal CSI-RS1. If the first configuration information includes the first sounding reference signal resource set information and the first sounding reference signal sequence set information, the terminal according to The first sounding reference signal resource set information determines the first sounding reference signal resource set, the first sounding reference signal sequence set is determined according to the first sounding reference signal sequence set information, and the terminal selects the first sounding reference signal from the first sounding reference signal resource set. The signal resource is to select the first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and the terminal sends the first sounding reference signal sequence on the first sounding reference signal resource.

The base station receives the first sounding reference signal sequence sent by the terminal, and determines the first spatial fingerprint according to the first sounding reference signal sequence.

The base station sends second configuration information to the terminal, where the second configuration information at least includes the configuration information of the downlink channel state information reference signal CSI-RS2, the first shared resource information, the second shared resource information, and the second sounding reference corresponding to the second shared resource Signal resource set information, second sounding reference signal sequence set information, third shared resource information, spread spectrum sequence set information when using the third shared resource to send data, and excessive collision indication information to send resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to let the base station fail to successfully receive the uplink data sent by each terminal if multiple terminals transmit data on the first shared resource and cause relatively large interference with each other. When the terminal performs data retransmission through the second shared resource and/or the third shared resource, the probability of data collision on the second shared resource and the third shared resource is reduced.

The terminal receives the second configuration information, and when the terminal has data to send, the terminal determines its geographic location Y, and the terminal receives the downlink channel state information reference signal CSI-RS2 according to the configuration information of the downlink channel state information reference signal CSI-RS2 to determine the channel state Information vector H2, if the distance between the terminal's geographic location Y and the geographic location X is less than or equal to 0.3 meters (it means that the terminal moves a very short distance during this time, it can be considered that the channel state information has not changed during this time) or the channel state The inner product of the information vectors H1 and H2 is greater than or equal to 0.97 (indicating that the current channel state information of the terminal is similar to the channel state information previously obtained based on CSI-RS1), then the terminal uses the first shared resource to send data. The distance of the geographic location X is greater than 0.3 meters and less than or equal to 1 meter (indicating that the terminal has moved some distance during this period, it can be considered that the channel state information may change during this period, so the terminal needs to re-send the sounding reference signal to let the base station Obtain the spatial fingerprint corresponding to the terminal) or the inner product of the channel state information vector H1 and H2 is less than 0.97 and greater than or equal to 0.9 (indicating that the current channel state information of the terminal and the channel state information previously obtained based on CSI-RS1 have some changes), then The terminal determines the second sounding reference signal resource according to the second sounding reference signal resource set information, determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and sends the second sounding reference signal on the second sounding reference signal resource. sequence, use the second shared resource to send data; if the distance between the geographical location Y of the terminal and the geographical location X is greater than 1 meter (indicating that the terminal has moved a relatively large distance during this period of time, its channel state information changes rapidly, and the base station It is very likely that the data sent by the terminal cannot be received by means of spatial fingerprints) or the inner product of the channel state information vector H1 and H2 is less than 0.9 (indicating that the current channel state information of the terminal and the previous channel state information based on CSI-RS1 have occurred. If there is a very large change, the base station may not be able to receive the data sent by the terminal through spatial fingerprinting), then the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data. Preferably, the downlink channel state information reference signal CSI-RS2 is located before the second shared resource in the time domain, with a difference of no more than 2ms. The advantage of this is that the terminal can accurately know whether the channel used for sending data is the same as the previous one based on The channels obtained by CSI-RS1 are consistent; the second sounding reference signal resource is located before the second shared resource in the time domain, with a difference of no more than 0.5ms. The advantage of this is that the base station can obtain an accurate second spatial fingerprint and help the base station to improve The probability of successfully receiving data on the second shared resource.

If the terminal does not receive the reception success information fed back by the base station after using the first shared resource to send data, the terminal determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the first sounding reference signal sequence on the second sounding reference signal resource. The second sounding reference signal sequence is used to transmit data using the second shared resource. If the terminal does not receive successful reception information fed back by the base station after using the second shared resource to send data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data. The advantage of this is to use a more robust shared resource to allow the terminal to send data, and to achieve hierarchical data transmission.

If the terminal uses the third shared resource to send data and does not receive the successful reception information fed back by the base station, this indicates that there may be multiple terminals sending data on the shared resource, and the interference between them is very large. Sending resource information Sending excessive collision indication information to the base station, it is hoped that the base station can use other methods to help the terminal transmit data and improve the spectral efficiency of the system. Preferably, the terminal must be a terminal supporting the D2D working mode.

The base station sends the D2D (Device to Device) mode configuration information by broadcasting after receiving the over-collision indication information, and requires the terminal set that supports the D2D mode to receive the D2D mode configuration information and enter the D2D working mode. The terminal that the base station sends its own data, the advantage of this is that the terminal that supports the D2D mode with unsuccessful data transmission can find the surrounding D2D terminal to help it transmit data to the base station, improve the probability of successful data reception, and then improve the spectral efficiency of the system.

After receiving the D2D mode configuration information, the terminal sending the excessive collision indication information determines the D2D resource for communicating with the terminal set, and the terminal sends data to the terminal set through the D2D resource.

Terminals in the terminal set that successfully receive data form a terminal subset, and the terminals in the terminal subset (referred to as relay terminals) select from the terminal subset according to the formula Px=(2^power)* The size of Px in CQI. More than Z relay terminals send data to the base station. The advantage of this is to allow relay terminals with more power to assist terminals to retransmit data as much as possible, to avoid terminals with low power from assisting other terminals to retransmit their own power after data retransmission. There is a problem, where power identifies the available power of the relay terminal, CQI represents the channel quality information between the relay terminal and the base station, and Z=round up (number of bits of data/64).

Example 9:

The base station sends the first configuration information and the downlink channel state information reference signal CSI-RS1 to the terminal located at the geographic location X. The first configuration information at least includes: information on the number of receiving antennas of the base station, if the number M of receiving antennas is greater than or equal to 128, Then, the first configuration information further includes first sounding reference signal resource set information and first sounding reference signal sequence set information. It should be noted that the more the number of receiving antennas, the stronger the ability of the base station to distinguish terminals through spatial information, and the more available spatial fingerprint information, so that the base station can effectively distinguish terminals by obtaining the uplink channel of the terminal, thereby improving The spectral efficiency of the system.

The terminal receives the first configuration information, and determines the channel state information vector H1 according to the downlink channel state reference signal CSI-RS1. If the first configuration information includes the first sounding reference signal resource set information and the first sounding reference signal sequence set information, the terminal according to The first sounding reference signal resource set information determines the first sounding reference signal resource set, the first sounding reference signal sequence set is determined according to the first sounding reference signal sequence set information, and the terminal selects the first sounding reference signal from the first sounding reference signal resource set. The signal resource is to select the first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and the terminal sends the first sounding reference signal sequence on the first sounding reference signal resource.

The base station receives the first sounding reference signal sequence sent by the terminal, and determines the first spatial fingerprint according to the first sounding reference signal sequence.

The base station sends second configuration information to the terminal, where the second configuration information at least includes the configuration information of the downlink channel state information reference signal CSI-RS2, the first shared resource information, the second shared resource information, and the second sounding reference corresponding to the second shared resource Signal resource set information, second sounding reference signal sequence set information, third shared resource information, spread spectrum sequence set information when using the third shared resource to send data, and excessive collision indication information to send resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to let the base station fail to successfully receive the uplink data sent by each terminal if multiple terminals transmit data on the first shared resource and cause relatively large interference with each other. When the terminal performs data retransmission through the second shared resource and/or the third shared resource, the probability of data collision on the second shared resource and the third shared resource is reduced.

The terminal receives the second configuration information, and when the terminal has data to send, the terminal determines its geographic location Y, and the terminal receives the downlink channel state information reference signal CSI-RS2 according to the configuration information of the downlink channel state information reference signal CSI-RS2 to determine the channel state Information vector H2, if the distance between the terminal's geographic location Y and the geographic location X is less than or equal to 0.3 meters (it means that the terminal moves a very short distance during this time, it can be considered that the channel state information has not changed during this time) or the channel state The inner product of the information vectors H1 and H2 is greater than or equal to 0.97 (indicating that the current channel state information of the terminal is similar to the channel state information previously obtained based on CSI-RS1), then the terminal uses the first shared resource to send data. The distance of the geographic location X is greater than 0.3 meters and less than or equal to 1 meter (indicating that the terminal has moved some distance during this period, it can be considered that the channel state information may change during this period, so the terminal needs to re-send the sounding reference signal to let the base station Obtain the spatial fingerprint corresponding to the terminal) or the inner product of the channel state information vector H1 and H2 is less than 0.97 and greater than or equal to 0.9 (indicating that the current channel state information of the terminal and the channel state information previously obtained based on CSI-RS1 have some changes), then The terminal determines the second sounding reference signal resource according to the second sounding reference signal resource set information, determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and sends the second sounding reference signal on the second sounding reference signal resource. sequence, use the second shared resource to send data; if the distance between the geographical location Y of the terminal and the geographical location X is greater than 1 meter (indicating that the terminal has moved a relatively large distance during this period of time, its channel state information changes rapidly, and the base station It is very likely that the data sent by the terminal cannot be received by means of spatial fingerprints) or the inner product of the channel state information vector H1 and H2 is less than 0.9 (indicating that the current channel state information of the terminal and the previous channel state information based on CSI-RS1 have occurred. If there is a very large change, the base station may not be able to receive the data sent by the terminal through spatial fingerprinting), then the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data.

If the terminal does not receive the reception success information fed back by the base station after using the first shared resource to send data, the terminal determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the first sounding reference signal sequence on the second sounding reference signal resource. The second sounding reference signal sequence is used to transmit data using the second shared resource. If the terminal does not receive successful reception information fed back by the base station after using the second shared resource to send data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data. The advantage of this is to use a more robust shared resource to allow the terminal to send data, and to achieve hierarchical data transmission.

If the terminal uses the third shared resource to send data and does not receive the successful reception information fed back by the base station, this indicates that there may be multiple terminals sending data on the shared resource, and the interference between them is very large. Sending resource information Sending excessive collision indication information to the base station, it is hoped that the base station can use other methods to help the terminal transmit data and improve the spectral efficiency of the system. Preferably, the terminal must be a terminal supporting the D2D working mode. Preferably, the terminal uses full power to send the over-collision indication information, where the over-collision indication information is a sequence shared by multiple terminals. The advantage of this is that one or more terminals can use the same time-frequency resource as much as possible. The same sequence is sent to let the base station know that there is a collision on the shared resource, and then make a decision for subsequent data transmission through D2D.

The base station sends the D2D (Device to Device) mode configuration information by broadcasting after receiving the over-collision indication information, and requires the terminal set that supports the D2D mode to receive the D2D mode configuration information and enter the D2D working mode. The terminal that the base station sends its own data, the advantage of this is that the terminal that supports the D2D mode with unsuccessful data transmission can find the surrounding D2D terminal to help it transmit data to the base station, improve the probability of successful data reception, and then improve the spectral efficiency of the system.

After receiving the D2D mode configuration information, the terminal sending the excessive collision indication information determines the D2D resource for communicating with the terminal set, and the terminal sends data to the terminal set through the D2D resource.

Terminals in the terminal set that successfully receive data form a terminal subset, and the terminals in the terminal subset (referred to as relay terminals) select from the terminal subset according to the formula Px=(2^power)* The size of Px in CQI. More than Z relay terminals send data to the base station. The advantage of this is to allow relay terminals with more power to assist terminals to retransmit data as much as possible, to avoid terminals with low power from assisting other terminals to retransmit their own power after data retransmission. There is a problem, where power identifies the available power of the relay terminal, CQI represents the channel quality information between the relay terminal and the base station, and Z=round up (number of bits of data/64).

Example 10:

The base station sends the first configuration information and the downlink channel state information reference signal CSI-RS1 to the terminal located at the geographic location X. The first configuration information at least includes: information on the number of receiving antennas of the base station, if the number M of receiving antennas is greater than or equal to 128, Then, the first configuration information further includes first sounding reference signal resource set information and first sounding reference signal sequence set information. It should be noted that the more the number of receiving antennas, the stronger the ability of the base station to distinguish terminals through spatial information, and the more available spatial fingerprint information, so that the base station can effectively distinguish terminals by obtaining the uplink channel of the terminal, thereby improving The spectral efficiency of the system.

The terminal receives the first configuration information, and determines the channel state information vector H1 according to the downlink channel state reference signal CSI-RS1. If the first configuration information includes the first sounding reference signal resource set information and the first sounding reference signal sequence set information, the terminal according to The first sounding reference signal resource set information determines the first sounding reference signal resource set, the first sounding reference signal sequence set is determined according to the first sounding reference signal sequence set information, and the terminal selects the first sounding reference signal from the first sounding reference signal resource set. The signal resource is to select the first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and the terminal sends the first sounding reference signal sequence on the first sounding reference signal resource.

The base station receives the first sounding reference signal sequence sent by the terminal, and determines the first spatial fingerprint according to the first sounding reference signal sequence.

The base station sends second configuration information to the terminal, where the second configuration information at least includes the configuration information of the downlink channel state information reference signal CSI-RS2, the first shared resource information, the second shared resource information, and the second sounding reference corresponding to the second shared resource Signal resource set information, second sounding reference signal sequence set information, third shared resource information, spread spectrum sequence set information when using the third shared resource to send data, and excessive collision indication information to send resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to let the base station fail to successfully receive the uplink data sent by each terminal if multiple terminals transmit data on the first shared resource and cause relatively large interference with each other. When the terminal performs data retransmission through the second shared resource and/or the third shared resource, the probability of data collision on the second shared resource and the third shared resource is reduced.

The terminal receives the second configuration information, and when the terminal has data to send, the terminal determines its geographic location Y, and the terminal receives the downlink channel state information reference signal CSI-RS2 according to the configuration information of the downlink channel state information reference signal CSI-RS2 to determine the channel state Information vector H2, if the distance between the terminal's geographic location Y and the geographic location X is less than or equal to 0.3 meters (it means that the terminal moves a very short distance during this time, it can be considered that the channel state information has not changed during this time) or the channel state The inner product of the information vectors H1 and H2 is greater than or equal to 0.97 (indicating that the current channel state information of the terminal is similar to the channel state information previously obtained based on CSI-RS1), then the terminal uses the first shared resource to send data. The distance of the geographic location X is greater than 0.3 meters and less than or equal to 1 meter (indicating that the terminal has moved some distance during this period, it can be considered that the channel state information may change during this period, so the terminal needs to re-send the sounding reference signal to let the base station Obtain the spatial fingerprint corresponding to the terminal) or the inner product of the channel state information vector H1 and H2 is less than 0.97 and greater than or equal to 0.9 (indicating that the current channel state information of the terminal and the channel state information previously obtained based on CSI-RS1 have some changes), then The terminal determines the second sounding reference signal resource according to the second sounding reference signal resource set information, determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and sends the second sounding reference signal on the second sounding reference signal resource. sequence, use the second shared resource to send data; if the distance between the geographical location Y of the terminal and the geographical location X is greater than 1 meter (indicating that the terminal has moved a relatively large distance during this period of time, its channel state information changes rapidly, and the base station It is very likely that the data sent by the terminal cannot be received by means of spatial fingerprints) or the inner product of the channel state information vector H1 and H2 is less than 0.9 (indicating that the current channel state information of the terminal and the previous channel state information based on CSI-RS1 have occurred. If there is a very large change, the base station may not be able to receive the data sent by the terminal through spatial fingerprinting), then the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data.

If the terminal does not receive the reception success information fed back by the base station after using the first shared resource to send data, the terminal determines the second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the first sounding reference signal sequence on the second sounding reference signal resource. The second sounding reference signal sequence is used to transmit data using the second shared resource. If the terminal does not receive successful reception information fed back by the base station after using the second shared resource to send data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses the third shared resource to send the data. The advantage of this is to use a more robust shared resource to allow the terminal to send data, and to achieve hierarchical data transmission.

If the terminal uses the third shared resource to send data and does not receive the successful reception information fed back by the base station, this indicates that there may be multiple terminals sending data on the shared resource, and the interference between them is very large. Sending resource information Sending excessive collision indication information to the base station, it is hoped that the base station can use other methods to help the terminal transmit data and improve the spectral efficiency of the system. Preferably, the terminal must be a terminal supporting the D2D working mode. Preferably, the terminal uses full power to send the over-collision indication information, where the over-collision indication information is a sequence shared by multiple terminals. The advantage of this is that one or more terminals can use the same time-frequency resource as much as possible. Send the same sequence to let the base station know that there is a collision on the shared resource, and then make a decision for subsequent data transmission through D2D.

The base station sends the D2D (Device to Device) mode configuration information by broadcasting after receiving the over-collision indication information, and requires the terminal set that supports the D2D mode to receive the D2D mode configuration information and enter the D2D working mode. The terminal that the base station sends its own data, the advantage of this is that the terminal that supports the D2D mode with unsuccessful data transmission can find the surrounding D2D terminal to help it transmit data to the base station, improve the probability of successful data reception, and then improve the spectral efficiency of the system.

After receiving the D2D mode configuration information, the terminal sending the excessive collision indication information determines the D2D resource for communicating with the terminal set, and the terminal sends data to the terminal set through the D2D resource.

Terminals in the terminal set that successfully receive data form a terminal subset, and the terminals in the terminal subset (referred to as relay terminals) select from the terminal subset according to the formula Px=(2^power)* The size of Px in CQI. More than Z relay terminals send data to the base station. The advantage of this is to allow relay terminals with more power to assist terminals to retransmit data as much as possible, to avoid terminals with low power from assisting other terminals to retransmit their own power after data retransmission. There is a problem, where power identifies the available power of the relay terminal, CQI represents the channel quality information between the relay terminal and the base station, and Z=round up (number of bits of data/64). Preferably, the relay terminals in the subset of terminals that need to send data to the base station use the same time-frequency resources and different demodulation pilot sequences to send data to the base station. The receiving algorithm improves the success rate of data reception.

The specific embodiments described above are the preferred embodiments of the present invention, and are not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to the specific embodiments. All equivalent changes made in accordance with the present invention are within the protection scope of the present invention.

Claims (9)

1. an adaptive internet of things data transmission method, is characterized in that, comprises the steps: S1: The base station sends first configuration information and downlink channel state information reference signal CSI-RS1 to a terminal located at geographic location X, where the first configuration information at least includes: information on the number of receiving antennas of the base station; S2: the terminal receives the first configuration information, and determines a channel state information vector H1 according to the downlink channel state reference signal CSI-RS1; S3: The base station sends second configuration information to the terminal, where the second configuration information includes: configuration information of the downlink channel state information reference signal CSI-RS2, first shared resource information, second shared resource information, the The second sounding reference signal resource set information and the second sounding reference signal sequence set information corresponding to the second shared resource, the third shared resource information, the spread spectrum sequence set information when the data is sent using the third shared resource, the collision is too strong Instruct the information to send resource information; S4: The terminal receives the second configuration information, and when the terminal has data to send, the terminal determines its current geographic location Y, and the terminal determines the current geographic location Y according to the downlink channel state information reference signal CSI-RS2 The configuration information determines the channel state information vector H2, and determines the data transmission mode according to the current geographic location Y or the channel state information vector H2, If the distance between the geographic location Y of the terminal and the geographic location X is less than or equal to 0.3 meters or the inner product of the channel state information vectors H1 and H2 is greater than or equal to 0.97, the terminal uses the first shared resource to send the data, if The distance between the geographic location Y of the terminal and the geographic location X is greater than 0.3 meters and less than or equal to 1 meter or the inner product of the channel state information vectors H1 and H2 is less than 0.97 and greater than or equal to 0.9, then the terminal according to the second The sounding reference signal resource set information determines a second sounding reference signal resource, the second sounding reference signal sequence is determined according to the second sounding reference signal sequence set information, and the terminal sends the first sounding reference signal resource on the second sounding reference signal resource. Two sounding reference signal sequences, using the second shared resource to send the data; if the distance between the geographic location Y of the terminal and the geographic location X is greater than 1 meter or the inner product of the channel state information vectors H1 and H2 is less than 0.9 , the terminal selects a spreading sequence from the set of spreading sequences to spread the data, and then uses the third shared resource to send the data; S5: After the terminal sends the data and does not receive the reception success information fed back by the base station, the terminal sends the excessive collision indication information to the base station according to the resource information sent by the excessive collision indication information; S6: the base station sends the D2D mode configuration information by broadcasting after receiving the over-collision indication information, and requires the terminal set supporting the D2D mode to enter the D2D working mode after receiving the D2D mode configuration information; S7: After receiving the D2D mode configuration information, the terminal sending the excessive collision indication information determines a D2D resource for communicating with the terminal set, and the terminal sends data to the terminal set through the D2D resource; S8: The relay terminal in the terminal set that has successfully received the data sends the data to the base station. 2. The adaptive Internet of Things data transmission method according to claim 1, wherein in step S1, if the number M of the receiving antennas is greater than or equal to 128, the first configuration information further includes the first configuration information. 1 sounding reference signal resource set information and first sounding reference signal sequence set information; In step S2, if the first configuration information includes the first sounding reference signal resource set information and the first sounding reference signal sequence set information, the terminal according to the first sounding reference signal resource set information determining a first sounding reference signal resource set, determining a first sounding reference signal sequence set according to the first sounding reference signal sequence set information, and the terminal selecting a first sounding reference signal resource from the first sounding reference signal resource set , select a first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and the terminal sends the first sounding reference signal on the first sounding reference signal resource sequence; In step S3, the base station receives the first sounding reference signal sequence sent by the terminal, determines a first spatial fingerprint according to the first sounding reference signal sequence, and determines a second spatial fingerprint according to the second sounding reference signal sequence . 3 . The adaptive IoT data transmission method according to claim 2 , wherein if the terminal uses the first shared resource to send data, the base station receives the data based on the first spatial fingerprint. 4 . data; if the terminal uses the second shared resource to send data, the base station receives the data based on the second spatial fingerprint. 4. The adaptive Internet of Things data transmission method according to claim 2, wherein in step S6, the terminal set does not include a relay terminal that needs to send its own data to the base station, and the The available power of the relay terminals in the terminal set is greater than or equal to 1/2 of its maximum power; in step S8, the relay terminals that successfully receive the data in the terminal set form a terminal sub-set, and the terminal sub-set The relay terminals in the set select no more than Z relay terminals from the terminal subset to send the data to the base station according to the formula Px=(2^power)*CQI, where the power is The available power of the relay terminal, CQI represents the channel quality information between the relay terminal and the base station, Z=round up (the number of bits of the data/64). 5. The adaptive Internet of Things data transmission method according to any one of claims 1-4, wherein the channel state information vectors H1 and H2 are both M*1-dimensional vectors, wherein M is the antenna number. 6. The adaptive IoT data transmission method according to any one of claims 2-4, wherein the first sounding reference signal resource set is smaller than the second sounding reference signal resource set, and the first sounding reference signal resource set is A sounding reference signal sequence set is smaller than the second sounding reference signal sequence set, the size of the first shared resource and the second shared resource are equal, and the length N of the spreading sequence in the spreading sequence set is greater than or equal to 2* M. 7 . The adaptive IoT data transmission method according to claim 6 , wherein the size of the third shared resource is N times the size of the first shared resource. 8 . 8 . The adaptive IoT data transmission method according to claim 1 , wherein the downlink channel state information reference signal CSI-RS2 is located before the second shared resource in the time domain. 9 . , the difference does not exceed 2ms; the second sounding reference signal resource is located before the second shared resource in the time domain, and the difference does not exceed 0.5ms. 9. The adaptive Internet of Things data transmission method according to claim 8, wherein the data carries the identification information of the terminal, and in step S5, the terminal uses full power to send the said terminal. Over-collision indication information, wherein the over-collision indication information is a sequence shared by multiple terminals; in step S8, the relay terminal that sends the data to the base station uses the same time-frequency resource to send the data to the base station the data.

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