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

Self-adaptive Internet of things data transmission method Download PDF

Info

Publication number
CN109660943B
CN109660943B CN201910040502.XA CN201910040502A CN109660943B CN 109660943 B CN109660943 B CN 109660943B CN 201910040502 A CN201910040502 A CN 201910040502A CN 109660943 B CN109660943 B CN 109660943B
Authority
CN
China
Prior art keywords
terminal
reference signal
information
sounding reference
data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201910040502.XA
Other languages
Chinese (zh)
Other versions
CN109660943A (en
Inventor
王洋
陈冀东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Polytechnic
Original Assignee
Shenzhen Polytechnic
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Polytechnic filed Critical Shenzhen Polytechnic
Priority to CN201910040502.XA priority Critical patent/CN109660943B/en
Publication of CN109660943A publication Critical patent/CN109660943A/en
Application granted granted Critical
Publication of CN109660943B publication Critical patent/CN109660943B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
    • H04W40/10—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources based on available power or energy
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

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

Self-adaptive Internet of things data transmission method
Technical Field
The invention relates to the field of wireless communication, in particular to a self-adaptive data transmission method for an internet of things.
Background
The 5G can meet diversified business requirements of people in various areas such as residence, work, leisure and traffic, and can provide extremely-sophisticated business experience such as ultra-high-definition video, virtual reality, augmented reality, cloud desktops and online games for users even in scenes with ultra-high traffic density, ultra-high connection number density and ultra-high mobility characteristics such as dense residential areas, offices, stadiums, outdoor gatherings, subways, expressways, high-speed rails and wide area coverage. Meanwhile, 5G can permeate into the fields of the Internet of things and various industries, is deeply integrated with industrial facilities, medical instruments, vehicles and the like, effectively meets the diversified business requirements of the vertical industries such as industry, medical treatment, transportation and the like, and realizes real 'everything interconnection'.
The 5G application scenarios can be divided into two broad categories, namely Mobile Broadband (MBB) and Internet of Things (IoT). Among these, the main technical requirements for mobile broadband access are high capacity, providing high data rates to meet the ever-increasing demand for data services. The internet of things is mainly driven by the requirement of Machine Communication (MTC), and can be further divided into two types, including low-speed Mass Machine Communication (MMC) and low-latency high-reliability Machine Communication. For the low-speed mass machine communication, mass nodes are accessed at a low speed, the transmitted data packets are usually small, the interval time is relatively long, and the cost and the power consumption of the nodes are usually low; for machine communication with low time delay and high reliability, the method is mainly used for machine communication with higher requirements on instantaneity and reliability, such as real-time alarm, real-time monitoring and the like.
In a fifth-generation mobile communication system, a scenario to be researched is a problem of reliable transmission of data in a narrowband internet of things in a TDD scenario, and a common solution mainly depends on repeated transmission of data for multiple times, which results in low spectral efficiency of the system, and how to increase spectral efficiency of a narrowband internet of things system is an important problem to be solved urgently by the internet of things system.
Disclosure of Invention
In order to solve the problem of low spectrum efficiency in the narrow-band Internet of things in the prior art, the invention provides a self-adaptive Internet of things data transmission method.
The invention comprises the following steps:
s1: 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, wherein the first configuration information at least comprises: receiving antenna number information 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-RS 1;
s3: the base station sends second configuration information to the terminal, wherein the second configuration information comprises: configuration information of a downlink channel state information reference signal CSI-RS2, first shared resource information, second sounding reference signal resource set information and second sounding reference signal sequence set information corresponding to the second shared resource, third shared resource information, spreading sequence set information when data is sent by using the third shared resource, and over-strong indication information sending resource information;
s4: the terminal receives the second configuration information, when the terminal has data to send, the terminal determines the current geographic position Y of the terminal, the terminal determines a channel state information vector H2 according to the configuration information of the downlink channel state information reference signal CSI-RS2, and determines a data sending mode according to the current geographic position Y or the channel state information vector H2;
s5: the terminal sends data according to the sequence with the priority as the first shared resource, the second shared resource and the third shared resource until the data is sent successfully, and if the terminal does not receive the successful receiving information fed back by the base station after sending the data by using the third shared resource, 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: after receiving the over-collision indication information, the base station sends D2D mode configuration information in a broadcasting mode, and requires a terminal set supporting a D2D mode to receive the D2D mode configuration information and enter a D2D working mode;
s7: after receiving the D2D mode configuration information, a terminal sending the over-collision indication information determines a D2D resource communicating with the terminal set, and the terminal sends data to the terminal set through the D2D resource;
s8: and the relay terminal which successfully receives the data in the terminal set sends the data to the base station.
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 determines a first sounding reference signal resource set according to the first sounding reference signal resource set information, determines a first sounding reference signal sequence set according to the first sounding reference signal sequence set information, selects a first sounding reference signal resource from the first sounding reference signal resource set by the terminal, selects a first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and transmits the first sounding reference signal sequence on the first sounding reference signal resource by the terminal;
in step S3, the base station receives the first sounding reference signal sequence sent by the terminal, and determines a first spatial fingerprint according to the first sounding reference signal sequence; a second spatial fingerprint is determined from the second sounding reference signal sequence.
In step S4, if the distance between the geographic position Y and the geographic position X of the terminal is less than or equal to 0.3 m or the inner product of the channel state information vectors H1 and H2 is greater than or equal to 0.97, the terminal transmits the data using a first shared resource, if the distance between the geographical position Y of the terminal and the geographical position X is greater than 0.3 m and less than or equal to 1 m 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 a second sounding reference signal resource according to the second sounding reference signal resource set information, determining a second sounding reference signal sequence according to the second sounding reference signal sequence set information, the terminal sends the second sounding reference signal sequence on the second sounding reference signal resource, and sends the data by using the second shared resource; if the distance between the geographic position Y and the geographic position X of the terminal is more 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 spreading sequence set to spread the data, and then transmits the data by using the third shared resource.
The invention is further improved, if the terminal uses the first shared resource to transmit data, the base station receives the data based on the first spatial fingerprint; and if the terminal uses the second shared resource to send data, the base station receives the data based on a second spatial fingerprint.
In step S6, the terminal set does not include the 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 equal to or greater than 1/2 of its maximum power; 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 select no more than Z relay terminals from the terminal subset to transmit the data to the base station according to the formula Px (2 power) × CQI, where power is the available power of the relay terminals, CQI represents the channel quality information between the relay terminals and the base station, and Z is rounded up (bit number of the data/64).
In a further improvement of the present invention, the channel state information vectors H1 and H2 are M × 1-dimensional vectors, where M is the number of antennas.
In a further improvement of the present invention, 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, the first shared resource and the second shared resource are equal in size, and a length N of a spreading sequence in the spreading sequence set is greater than or equal to 2M.
In a further refinement, the third shared resource is N times larger than the first shared resource.
In a further improvement of the present invention, a difference between the time domain of the downlink channel state information reference signal CSI-RS2 and the time domain of the downlink channel state information reference signal CSI-RS2 before the second shared resource is not more than 2 ms; the second sounding reference signal resource is located before the second shared resource in the time domain, and the difference is not more than 0.5 ms.
In a further improvement of the present invention, the data carries identification information of the terminal, and in step S5, the terminal sends the over-collision indication information using full power, where 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 using the same time-frequency resource.
Compared with the prior art, 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; the base station can effectively distinguish the terminals by acquiring the uplink channel of the terminal, so that the frequency spectrum efficiency of the system is improved; in transmission, a terminal is allowed to transmit data by using a more robust shared resource, thereby realizing hierarchical transmission of the data.
Drawings
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a diagram illustrating a location relationship of a shared resource.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1 and 2, the present invention comprises the steps of:
s1: 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, wherein the first configuration information at least comprises: receiving antenna number information 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-RS 1;
s3: the base station sends second configuration information to the terminal, wherein the second configuration information comprises: configuration information of a downlink channel state information reference signal CSI-RS2, first shared resource information, second sounding reference signal resource set information and second sounding reference signal sequence set information corresponding to the second shared resource, third shared resource information, spreading sequence set information when data is sent by using the third shared resource, and over-strong indication information sending resource information;
s4: the terminal receives the second configuration information, when the terminal has data to send, the terminal determines the current geographic position Y of the terminal, the terminal determines a channel state information vector H2 according to the configuration information of the downlink channel state information reference signal CSI-RS2, and determines a data sending mode according to the current geographic position Y or the channel state information vector H2;
s5: the terminal sends data according to the sequence with the priority as the first shared resource, the second shared resource and the third shared resource until the data is sent successfully, and if the terminal does not receive the successful receiving information fed back by the base station after sending the data by using the third shared resource, 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: after receiving the over-collision indication information, the base station sends D2D mode configuration information in a broadcasting mode, and requires a terminal set supporting a D2D mode to receive the D2D mode configuration information and enter a D2D working mode;
s7: after receiving the D2D mode configuration information, a terminal sending the over-collision indication information determines a D2D resource communicating with the terminal set, and the terminal sends data to the terminal set through the D2D resource;
s8: and the relay terminal which successfully receives the data in the terminal set sends the data to the base station.
The present invention will be described in detail with reference to examples.
Example 1:
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, and the first configuration information at least comprises: the number of receiving antennas of the base station is information, and if the number of receiving antennas M 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. It should be noted that the more the number of receiving antennas is, the stronger the capability of the base station to distinguish the terminal through the spatial information is, and the more the available spatial fingerprint information is, so that the base station can effectively distinguish the terminal by acquiring the uplink channel of the terminal, thereby improving the spectrum efficiency of the system.
The terminal receives first configuration information, determines a channel state information vector H1 according to a downlink channel state reference signal CSI-RS1, determines a first sounding reference signal resource set according to the first sounding reference signal resource set information if the first configuration information contains the first sounding reference signal resource set information and the first sounding reference signal sequence set information, determines a first sounding reference signal sequence set according to the first sounding reference signal resource set information, selects a first sounding reference signal resource from the first sounding reference signal resource set according to the first sounding reference signal resource, selects a first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and sends the first sounding reference signal sequence on the first sounding reference signal resource.
The base station receives a first sounding reference signal sequence sent by the terminal, and determines a first spatial fingerprint according to the first sounding reference signal sequence.
The base station sends second configuration information to the terminal, wherein the second configuration information at least comprises configuration information of a downlink channel state information reference signal CSI-RS2, first shared resource information, second sounding reference signal resource set information and second sounding reference signal sequence set information corresponding to the second shared resource, third shared resource information, spread spectrum sequence set information when the third shared resource is used for sending data, and over-strong indication information is used for sending the resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to allow the terminal to perform data retransmission through the second shared resource and/or the third shared resource if the base station cannot successfully receive uplink data sent by each terminal due to relatively large interference between data sent by multiple terminals on the first shared resource, and the probability of data collision on the second shared resource and the third shared resource is reduced.
The terminal receives the second configuration information, when the terminal has data to send, the terminal determines the geographical position Y of the terminal, 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 a channel state information vector H2, if the distance between the geographical position Y of the terminal and the geographical position X is less than or equal to 0.3 m (the distance of the terminal moving in the period is very short, and the channel state information does not change in the period can be considered) or the inner product of the channel state information vectors H1 and H2 is more than or equal to 0.97 (the current channel state information of the terminal is similar to the channel state information obtained based on the CSI-RS1 before), the terminal uses the first shared resource to send the data, if the distance between the geographical position Y of the terminal and the geographical position X is more than 0.3 m and less than or equal to 1 m (the distance of the terminal moving in the period is considered, it can be considered that channel state information may change in this period of time, so that the terminal needs to retransmit a sounding reference signal to enable the base station to obtain a spatial fingerprint corresponding to the terminal) or an inner product of channel state information vectors H1 and H2 is less than 0.97 and greater than or equal to 0.9 (which indicates that the current channel state information of the terminal and the channel state information obtained based on CSI-RS1 before have changed a little), the terminal determines a second sounding reference signal resource according to the second sounding reference signal resource set information, determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, transmits the second sounding reference signal sequence on the second sounding reference signal resource, and transmits data using a second shared resource; if the distance between the geographic position Y of the terminal and the geographic position X is greater than 1 meter (which indicates that the terminal has moved a relatively large distance in this period of time, the channel state information changes relatively quickly, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), or the inner product of the channel state information vectors H1 and H2 is less than 0.9 (which indicates that the current channel state information of the terminal has changed greatly from the channel state information obtained previously based on CSI-RS1, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), the terminal selects a spreading sequence from a spreading sequence set to spread the data, and then transmits the data by using a third shared resource.
And if the terminal does not receive successful receiving information fed back by the base station after the terminal uses the first shared resource to send data, the terminal determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the second sounding reference signal sequence on the second sounding reference signal resource and uses the second shared resource to send data. And if the terminal does not receive the successful receiving information fed back by the base station after the terminal uses the second shared resource to send the data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses a third shared resource to send the data. The advantage of this is that the terminal sends data using the more robust shared resource, and the hierarchical transmission of data is realized.
If the terminal does not receive the successful receiving information fed back by the base station after sending data by using the third shared resource, which indicates that there may be a plurality of terminals sending data on the shared resource and the interference between the terminals is very large, the terminal sends the resource information according to the over-collision indication information and sends the over-collision indication information to the base station, and the base station is expected to help the terminal to transmit data by using other methods, so as to improve the spectrum efficiency of the system. Preferably, the terminal must be a terminal that supports the D2D mode of operation.
After receiving the over-collision indication information, the base station sends D2D (Device to Device) mode configuration information in a broadcast mode, and requests the terminal set supporting the D2D mode to receive the D2D mode configuration information and enter a D2D working mode, wherein the terminal set does not include a terminal which needs to send data to the base station, so that the terminal which has failed data transmission and supports the D2D mode searches peripheral D2D terminals to help the terminal to transmit data to the base station, thereby improving the probability of successful data reception and further improving the spectrum efficiency of the system.
And after receiving the D2D mode configuration information, the terminal sending the over-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.
The terminal successfully receiving the data in the terminal set forms a terminal subset, and the terminal (called relay terminal) in the terminal subset selects no more than Z relay terminals from the terminal subset to send data to the base station according to the formula Px ═ 2 power ^ CQI, so that the relay terminal with the largest electric quantity can assist the terminal to retransmit the data as much as possible, and the problem that the terminal with the smallest electric quantity can not retransmit the data due to the electric quantity of the terminal itself, wherein the power identifies the available electric quantity of the relay terminal, the CQI represents the channel quality information between the relay terminal and the base station, and Z ═ is rounded up (bit number of data/64).
Example 2:
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, and the first configuration information at least comprises: the number of receiving antennas of the base station is information, and if the number of receiving antennas M 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. It should be noted that the more the number of receiving antennas is, the stronger the capability of the base station to distinguish the terminal through the spatial information is, and the more the available spatial fingerprint information is, so that the base station can effectively distinguish the terminal by acquiring the uplink channel of the terminal, thereby improving the spectrum efficiency of the system.
The terminal receives first configuration information, determines a channel state information vector H1 according to a downlink channel state reference signal CSI-RS1, determines a first sounding reference signal resource set according to the first sounding reference signal resource set information if the first configuration information contains the first sounding reference signal resource set information and the first sounding reference signal sequence set information, determines a first sounding reference signal sequence set according to the first sounding reference signal resource set information, selects a first sounding reference signal resource from the first sounding reference signal resource set according to the first sounding reference signal resource, selects a first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and sends the first sounding reference signal sequence on the first sounding reference signal resource.
The base station receives a first sounding reference signal sequence sent by the terminal, and determines a first spatial fingerprint according to the first sounding reference signal sequence.
The base station sends second configuration information to the terminal, wherein the second configuration information at least comprises configuration information of a downlink channel state information reference signal CSI-RS2, first shared resource information, second sounding reference signal resource set information and second sounding reference signal sequence set information corresponding to the second shared resource, third shared resource information, spread spectrum sequence set information when the third shared resource is used for sending data, and over-strong indication information is used for sending the resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to allow the terminal to perform data retransmission through the second shared resource and/or the third shared resource if the base station cannot successfully receive uplink data sent by each terminal due to relatively large interference between data sent by multiple terminals on the first shared resource, and the probability of data collision on the second shared resource and the third shared resource is reduced.
The terminal receives the second configuration information, when the terminal has data to send, the terminal determines the geographical position Y of the terminal, 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 a channel state information vector H2, if the distance between the geographical position Y of the terminal and the geographical position X is less than or equal to 0.3 m (the distance of the terminal moving in the period is very short, and the channel state information does not change in the period can be considered) or the inner product of the channel state information vectors H1 and H2 is more than or equal to 0.97 (the current channel state information of the terminal is similar to the channel state information obtained based on the CSI-RS1 before), the terminal uses the first shared resource to send the data, if the distance between the geographical position Y of the terminal and the geographical position X is more than 0.3 m and less than or equal to 1 m (the distance of the terminal moving in the period is considered, it can be considered that channel state information may change in this period of time, so that the terminal needs to retransmit a sounding reference signal to enable the base station to obtain a spatial fingerprint corresponding to the terminal) or an inner product of channel state information vectors H1 and H2 is less than 0.97 and greater than or equal to 0.9 (which indicates that the current channel state information of the terminal and the channel state information obtained based on CSI-RS1 before have changed a little), the terminal determines a second sounding reference signal resource according to the second sounding reference signal resource set information, determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, transmits the second sounding reference signal sequence on the second sounding reference signal resource, and transmits data using a second shared resource; if the distance between the geographic position Y of the terminal and the geographic position X is greater than 1 meter (which indicates that the terminal has moved a relatively large distance in this period of time, the channel state information changes relatively quickly, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), or the inner product of the channel state information vectors H1 and H2 is less than 0.9 (which indicates that the current channel state information of the terminal has changed greatly from the channel state information obtained previously based on CSI-RS1, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), the terminal selects a spreading sequence from a spreading sequence set to spread the data, and then transmits the data by using a third shared resource. Preferably, H1 and H2 are both M × 1-dimensional vectors, and the narrowband internet of things terminal for the reason of this assumption generally has only one receiving antenna due to the implementation cost.
And if the terminal does not receive successful receiving information fed back by the base station after the terminal uses the first shared resource to send data, the terminal determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the second sounding reference signal sequence on the second sounding reference signal resource and uses the second shared resource to send data. And if the terminal does not receive the successful receiving information fed back by the base station after the terminal uses the second shared resource to send the data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses a third shared resource to send the data. The advantage of this is that the terminal sends data using the more robust shared resource, and the hierarchical transmission of data is realized.
If the terminal does not receive the successful receiving information fed back by the base station after sending data by using the third shared resource, which indicates that there may be a plurality of terminals sending data on the shared resource and the interference between the terminals is very large, the terminal sends the resource information according to the over-collision indication information and sends the over-collision indication information to the base station, and the base station is expected to help the terminal to transmit data by using other methods, so as to improve the spectrum efficiency of the system. Preferably, the terminal must be a terminal that supports the D2D mode of operation.
After receiving the over-collision indication information, the base station sends D2D (Device to Device) mode configuration information in a broadcast mode, and requests the terminal set supporting the D2D mode to receive the D2D mode configuration information and enter a D2D working mode, wherein the terminal set does not include a terminal which needs to send data to the base station, so that the terminal which has failed data transmission and supports the D2D mode searches peripheral D2D terminals to help the terminal to transmit data to the base station, thereby improving the probability of successful data reception and further improving the spectrum efficiency of the system.
And after receiving the D2D mode configuration information, the terminal sending the over-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.
The terminal successfully receiving the data in the terminal set forms a terminal subset, and the terminal (called relay terminal) in the terminal subset selects no more than Z relay terminals from the terminal subset to send data to the base station according to the formula Px ═ 2 power ^ CQI, so that the relay terminal with the largest electric quantity can assist the terminal to retransmit the data as much as possible, and the problem that the terminal with the smallest electric quantity can not retransmit the data due to the electric quantity of the terminal itself, wherein the power identifies the available electric quantity of the relay terminal, the CQI represents the channel quality information between the relay terminal and the base station, and Z ═ is rounded up (bit number of data/64).
Example 3:
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, and the first configuration information at least comprises: the number of receiving antennas of the base station is information, and if the number of receiving antennas M 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. It should be noted that the more the number of receiving antennas is, the stronger the capability of the base station to distinguish the terminal through the spatial information is, and the more the available spatial fingerprint information is, so that the base station can effectively distinguish the terminal by acquiring the uplink channel of the terminal, thereby improving the spectrum efficiency of the system.
The terminal receives first configuration information, determines a channel state information vector H1 according to a downlink channel state reference signal CSI-RS1, determines a first sounding reference signal resource set according to the first sounding reference signal resource set information if the first configuration information contains the first sounding reference signal resource set information and the first sounding reference signal sequence set information, determines a first sounding reference signal sequence set according to the first sounding reference signal resource set information, selects a first sounding reference signal resource from the first sounding reference signal resource set according to the first sounding reference signal resource, selects a first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and sends the first sounding reference signal sequence on the first sounding reference signal resource.
The base station receives a first sounding reference signal sequence sent by the terminal, and determines a first spatial fingerprint according to the first sounding reference signal sequence.
The base station sends second configuration information to the terminal, wherein the second configuration information at least comprises configuration information of a downlink channel state information reference signal CSI-RS2, first shared resource information, second sounding reference signal resource set information and second sounding reference signal sequence set information corresponding to the second shared resource, third shared resource information, spread spectrum sequence set information when the third shared resource is used for sending data, and over-strong indication information is used for sending the resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to allow the terminal to perform data retransmission through the second shared resource and/or the third shared resource if the base station cannot successfully receive uplink data sent by each terminal due to relatively large interference between data sent by multiple terminals on the first shared resource, and 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 first shared resource and the second shared resource are equal in size, so that the problem that when a plurality of terminals use the shared resource to generate data simultaneously, the spatial fingerprints of the plurality of terminals are similar due to strong channel correlation, and the base station cannot successfully receive the data is solved.
The terminal receives the second configuration information, when the terminal has data to send, the terminal determines the geographical position Y of the terminal, 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 a channel state information vector H2, if the distance between the geographical position Y of the terminal and the geographical position X is less than or equal to 0.3 m (the distance of the terminal moving in the period is very short, and the channel state information does not change in the period can be considered) or the inner product of the channel state information vectors H1 and H2 is more than or equal to 0.97 (the current channel state information of the terminal is similar to the channel state information obtained based on the CSI-RS1 before), the terminal uses the first shared resource to send the data, if the distance between the geographical position Y of the terminal and the geographical position X is more than 0.3 m and less than or equal to 1 m (the distance of the terminal moving in the period is considered, it can be considered that channel state information may change in this period of time, so that the terminal needs to retransmit a sounding reference signal to enable the base station to obtain a spatial fingerprint corresponding to the terminal) or an inner product of channel state information vectors H1 and H2 is less than 0.97 and greater than or equal to 0.9 (which indicates that the current channel state information of the terminal and the channel state information obtained based on CSI-RS1 before have changed a little), the terminal determines a second sounding reference signal resource according to the second sounding reference signal resource set information, determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, transmits the second sounding reference signal sequence on the second sounding reference signal resource, and transmits data using a second shared resource; if the distance between the geographic position Y of the terminal and the geographic position X is greater than 1 meter (which indicates that the terminal has moved a relatively large distance in this period of time, the channel state information changes relatively quickly, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), or the inner product of the channel state information vectors H1 and H2 is less than 0.9 (which indicates that the current channel state information of the terminal has changed greatly from the channel state information obtained previously based on CSI-RS1, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), the terminal selects a spreading sequence from a spreading sequence set to spread the data, and then transmits the data by using a third shared resource.
And if the terminal does not receive successful receiving information fed back by the base station after the terminal uses the first shared resource to send data, the terminal determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the second sounding reference signal sequence on the second sounding reference signal resource and uses the second shared resource to send data. And if the terminal does not receive the successful receiving information fed back by the base station after the terminal uses the second shared resource to send the data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses a third shared resource to send the data. The advantage of this is that the terminal sends data using the more robust shared resource, and the hierarchical transmission of data is realized.
If the terminal does not receive the successful receiving information fed back by the base station after sending data by using the third shared resource, which indicates that there may be a plurality of terminals sending data on the shared resource and the interference between the terminals is very large, the terminal sends the resource information according to the over-collision indication information and sends the over-collision indication information to the base station, and the base station is expected to help the terminal to transmit data by using other methods, so as to improve the spectrum efficiency of the system. Preferably, the terminal must be a terminal that supports the D2D mode of operation.
After receiving the over-collision indication information, the base station sends D2D (Device to Device) mode configuration information in a broadcast mode, and requests the terminal set supporting the D2D mode to receive the D2D mode configuration information and enter a D2D working mode, wherein the terminal set does not include a terminal which needs to send data to the base station, so that the terminal which has failed data transmission and supports the D2D mode searches peripheral D2D terminals to help the terminal to transmit data to the base station, thereby improving the probability of successful data reception and further improving the spectrum efficiency of the system.
And after receiving the D2D mode configuration information, the terminal sending the over-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.
The terminal successfully receiving the data in the terminal set forms a terminal subset, and the terminal (called relay terminal) in the terminal subset selects no more than Z relay terminals from the terminal subset to send data to the base station according to the formula Px ═ 2 power ^ CQI, so that the relay terminal with the largest electric quantity can assist the terminal to retransmit the data as much as possible, and the problem that the terminal with the smallest electric quantity can not retransmit the data due to the electric quantity of the terminal itself, wherein the power identifies the available electric quantity of the relay terminal, the CQI represents the channel quality information between the relay terminal and the base station, and Z ═ is rounded up (bit number of data/64).
Example 4:
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, and the first configuration information at least comprises: the number of receiving antennas of the base station is information, and if the number of receiving antennas M 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. It should be noted that the more the number of receiving antennas is, the stronger the capability of the base station to distinguish the terminal through the spatial information is, and the more the available spatial fingerprint information is, so that the base station can effectively distinguish the terminal by acquiring the uplink channel of the terminal, thereby improving the spectrum efficiency of the system.
The terminal receives first configuration information, determines a channel state information vector H1 according to a downlink channel state reference signal CSI-RS1, determines a first sounding reference signal resource set according to the first sounding reference signal resource set information if the first configuration information contains the first sounding reference signal resource set information and the first sounding reference signal sequence set information, determines a first sounding reference signal sequence set according to the first sounding reference signal resource set information, selects a first sounding reference signal resource from the first sounding reference signal resource set according to the first sounding reference signal resource, selects a first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and sends the first sounding reference signal sequence on the first sounding reference signal resource.
The base station receives a first sounding reference signal sequence sent by the terminal, and determines a first spatial fingerprint according to the first sounding reference signal sequence.
The base station sends second configuration information to the terminal, wherein the second configuration information at least comprises configuration information of a downlink channel state information reference signal CSI-RS2, first shared resource information, second sounding reference signal resource set information and second sounding reference signal sequence set information corresponding to the second shared resource, third shared resource information, spread spectrum sequence set information when the third shared resource is used for sending data, and over-strong indication information is used for sending the resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to allow the terminal to perform data retransmission through the second shared resource and/or the third shared resource if the base station cannot successfully receive uplink data sent by each terminal due to relatively large interference between data sent by multiple terminals on the first shared resource, and the probability of data collision on the second shared resource and the third shared resource is reduced. Preferably, the length N of the spreading sequence in the spreading sequence set is greater than or equal to 2 × M, which is because if the base station cannot successfully receive uplink data simultaneously transmitted by multiple terminals on the first shared resource or the second shared resource through the M × 1-dimensional spatial fingerprint, it indicates that the channel correlation between the terminals is very strong, and a longer spreading sequence is needed to solve the problem of interference between users.
The terminal receives the second configuration information, when the terminal has data to send, the terminal determines the geographical position Y of the terminal, 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 a channel state information vector H2, if the distance between the geographical position Y of the terminal and the geographical position X is less than or equal to 0.3 m (the distance of the terminal moving in the period is very short, and the channel state information does not change in the period can be considered) or the inner product of the channel state information vectors H1 and H2 is more than or equal to 0.97 (the current channel state information of the terminal is similar to the channel state information obtained based on the CSI-RS1 before), the terminal uses the first shared resource to send the data, if the distance between the geographical position Y of the terminal and the geographical position X is more than 0.3 m and less than or equal to 1 m (the distance of the terminal moving in the period is considered, it can be considered that channel state information may change in this period of time, so that the terminal needs to retransmit a sounding reference signal to enable the base station to obtain a spatial fingerprint corresponding to the terminal) or an inner product of channel state information vectors H1 and H2 is less than 0.97 and greater than or equal to 0.9 (which indicates that the current channel state information of the terminal and the channel state information obtained based on CSI-RS1 before have changed a little), the terminal determines a second sounding reference signal resource according to the second sounding reference signal resource set information, determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, transmits the second sounding reference signal sequence on the second sounding reference signal resource, and transmits data using a second shared resource; if the distance between the geographic position Y of the terminal and the geographic position X is greater than 1 meter (which indicates that the terminal has moved a relatively large distance in this period of time, the channel state information changes relatively quickly, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), or the inner product of the channel state information vectors H1 and H2 is less than 0.9 (which indicates that the current channel state information of the terminal has changed greatly from the channel state information obtained previously based on CSI-RS1, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), the terminal selects a spreading sequence from a spreading sequence set to spread the data, and then transmits the data by using a third shared resource.
And if the terminal does not receive successful receiving information fed back by the base station after the terminal uses the first shared resource to send data, the terminal determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the second sounding reference signal sequence on the second sounding reference signal resource and uses the second shared resource to send data. And if the terminal does not receive the successful receiving information fed back by the base station after the terminal uses the second shared resource to send the data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses a third shared resource to send the data. The advantage of this is that the terminal sends data using the more robust shared resource, and the hierarchical transmission of data is realized.
If the terminal does not receive the successful receiving information fed back by the base station after sending data by using the third shared resource, which indicates that there may be a plurality of terminals sending data on the shared resource and the interference between the terminals is very large, the terminal sends the resource information according to the over-collision indication information and sends the over-collision indication information to the base station, and the base station is expected to help the terminal to transmit data by using other methods, so as to improve the spectrum efficiency of the system. Preferably, the terminal must be a terminal that supports the D2D mode of operation.
After receiving the over-collision indication information, the base station sends D2D (Device to Device) mode configuration information in a broadcast mode, and requests the terminal set supporting the D2D mode to receive the D2D mode configuration information and enter a D2D working mode, wherein the terminal set does not include a terminal which needs to send data to the base station, so that the terminal which has failed data transmission and supports the D2D mode searches peripheral D2D terminals to help the terminal to transmit data to the base station, thereby improving the probability of successful data reception and further improving the spectrum efficiency of the system.
And after receiving the D2D mode configuration information, the terminal sending the over-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.
The terminal successfully receiving the data in the terminal set forms a terminal subset, and the terminal (called relay terminal) in the terminal subset selects no more than Z relay terminals from the terminal subset to send data to the base station according to the formula Px ═ 2 power ^ CQI, so that the relay terminal with the largest electric quantity can assist the terminal to retransmit the data as much as possible, and the problem that the terminal with the smallest electric quantity can not retransmit the data due to the electric quantity of the terminal itself, wherein the power identifies the available electric quantity of the relay terminal, the CQI represents the channel quality information between the relay terminal and the base station, and Z ═ is rounded up (bit number of data/64).
Example 5:
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, and the first configuration information at least comprises: the number of receiving antennas of the base station is information, and if the number of receiving antennas M 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. It should be noted that the more the number of receiving antennas is, the stronger the capability of the base station to distinguish the terminal through the spatial information is, and the more the available spatial fingerprint information is, so that the base station can effectively distinguish the terminal by acquiring the uplink channel of the terminal, thereby improving the spectrum efficiency of the system.
The terminal receives first configuration information, determines a channel state information vector H1 according to a downlink channel state reference signal CSI-RS1, determines a first sounding reference signal resource set according to the first sounding reference signal resource set information if the first configuration information contains the first sounding reference signal resource set information and the first sounding reference signal sequence set information, determines a first sounding reference signal sequence set according to the first sounding reference signal resource set information, selects a first sounding reference signal resource from the first sounding reference signal resource set according to the first sounding reference signal resource, selects a first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and sends the first sounding reference signal sequence on the first sounding reference signal resource.
The base station receives a first sounding reference signal sequence sent by the terminal, and determines a first spatial fingerprint according to the first sounding reference signal sequence.
The base station sends second configuration information to the terminal, wherein the second configuration information at least comprises configuration information of a downlink channel state information reference signal CSI-RS2, first shared resource information, second sounding reference signal resource set information and second sounding reference signal sequence set information corresponding to the second shared resource, third shared resource information, spread spectrum sequence set information when the third shared resource is used for sending data, and over-strong indication information is used for sending the resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to allow the terminal to perform data retransmission through the second shared resource and/or the third shared resource if the base station cannot successfully receive uplink data sent by each terminal due to relatively large interference between data sent by multiple terminals on the first shared resource, and 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 that of the first shared resource, which is because the terminal needs to transmit data on the third shared resource by means of data spreading, so that more shared resources are needed.
The terminal receives the second configuration information, when the terminal has data to send, the terminal determines the geographical position Y of the terminal, 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 a channel state information vector H2, if the distance between the geographical position Y of the terminal and the geographical position X is less than or equal to 0.3 m (the distance of the terminal moving in the period is very short, and the channel state information does not change in the period can be considered) or the inner product of the channel state information vectors H1 and H2 is more than or equal to 0.97 (the current channel state information of the terminal is similar to the channel state information obtained based on the CSI-RS1 before), the terminal uses the first shared resource to send the data, if the distance between the geographical position Y of the terminal and the geographical position X is more than 0.3 m and less than or equal to 1 m (the distance of the terminal moving in the period is considered, it can be considered that channel state information may change in this period of time, so that the terminal needs to retransmit a sounding reference signal to enable the base station to obtain a spatial fingerprint corresponding to the terminal) or an inner product of channel state information vectors H1 and H2 is less than 0.97 and greater than or equal to 0.9 (which indicates that the current channel state information of the terminal and the channel state information obtained based on CSI-RS1 before have changed a little), the terminal determines a second sounding reference signal resource according to the second sounding reference signal resource set information, determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, transmits the second sounding reference signal sequence on the second sounding reference signal resource, and transmits data using a second shared resource; if the distance between the geographic position Y of the terminal and the geographic position X is greater than 1 meter (which indicates that the terminal has moved a relatively large distance in this period of time, the channel state information changes relatively quickly, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), or the inner product of the channel state information vectors H1 and H2 is less than 0.9 (which indicates that the current channel state information of the terminal has changed greatly from the channel state information obtained previously based on CSI-RS1, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), the terminal selects a spreading sequence from a spreading sequence set to spread the data, and then transmits the data by using a third shared resource.
And if the terminal does not receive successful receiving information fed back by the base station after the terminal uses the first shared resource to send data, the terminal determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the second sounding reference signal sequence on the second sounding reference signal resource and uses the second shared resource to send data. And if the terminal does not receive the successful receiving information fed back by the base station after the terminal uses the second shared resource to send the data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses a third shared resource to send the data. The advantage of this is that the terminal sends data using the more robust shared resource, and the hierarchical transmission of data is realized.
If the terminal does not receive the successful receiving information fed back by the base station after sending data by using the third shared resource, which indicates that there may be a plurality of terminals sending data on the shared resource and the interference between the terminals is very large, the terminal sends the resource information according to the over-collision indication information and sends the over-collision indication information to the base station, and the base station is expected to help the terminal to transmit data by using other methods, so as to improve the spectrum efficiency of the system. Preferably, the terminal must be a terminal that supports the D2D mode of operation.
After receiving the over-collision indication information, the base station sends D2D (Device to Device) mode configuration information in a broadcast mode, and requests the terminal set supporting the D2D mode to receive the D2D mode configuration information and enter a D2D working mode, wherein the terminal set does not include a terminal which needs to send data to the base station, so that the terminal which has failed data transmission and supports the D2D mode searches peripheral D2D terminals to help the terminal to transmit data to the base station, thereby improving the probability of successful data reception and further improving the spectrum efficiency of the system.
And after receiving the D2D mode configuration information, the terminal sending the over-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.
The terminal successfully receiving the data in the terminal set forms a terminal subset, and the terminal (called relay terminal) in the terminal subset selects no more than Z relay terminals from the terminal subset to send data to the base station according to the formula Px ═ 2 power ^ CQI, so that the relay terminal with the largest electric quantity can assist the terminal to retransmit the data as much as possible, and the problem that the terminal with the smallest electric quantity can not retransmit the data due to the electric quantity of the terminal itself, wherein the power identifies the available electric quantity of the relay terminal, the CQI represents the channel quality information between the relay terminal and the base station, and Z ═ is rounded up (bit number of data/64).
Example 6:
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, and the first configuration information at least comprises: the number of receiving antennas of the base station is information, and if the number of receiving antennas M 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. It should be noted that the more the number of receiving antennas is, the stronger the capability of the base station to distinguish the terminal through the spatial information is, and the more the available spatial fingerprint information is, so that the base station can effectively distinguish the terminal by acquiring the uplink channel of the terminal, thereby improving the spectrum efficiency of the system.
The terminal receives first configuration information, determines a channel state information vector H1 according to a downlink channel state reference signal CSI-RS1, determines a first sounding reference signal resource set according to the first sounding reference signal resource set information if the first configuration information contains the first sounding reference signal resource set information and the first sounding reference signal sequence set information, determines a first sounding reference signal sequence set according to the first sounding reference signal resource set information, selects a first sounding reference signal resource from the first sounding reference signal resource set according to the first sounding reference signal resource, selects a first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and sends the first sounding reference signal sequence on the first sounding reference signal resource.
The base station receives a first sounding reference signal sequence sent by the terminal, and determines a first spatial fingerprint according to the first sounding reference signal sequence.
The base station sends second configuration information to the terminal, wherein the second configuration information at least comprises configuration information of a downlink channel state information reference signal CSI-RS2, first shared resource information, second sounding reference signal resource set information and second sounding reference signal sequence set information corresponding to the second shared resource, third shared resource information, spread spectrum sequence set information when the third shared resource is used for sending data, and over-strong indication information is used for sending the resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to allow the terminal to perform data retransmission through the second shared resource and/or the third shared resource if the base station cannot successfully receive uplink data sent by each terminal due to relatively large interference between data sent by multiple terminals on the first shared resource, and the probability of data collision on the second shared resource and the third shared resource is reduced.
The terminal receives the second configuration information, when the terminal has data to send, the terminal determines the geographical position Y of the terminal, 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 a channel state information vector H2, if the distance between the geographical position Y of the terminal and the geographical position X is less than or equal to 0.3 m (the distance of the terminal moving in the period is very short, and the channel state information does not change in the period can be considered) or the inner product of the channel state information vectors H1 and H2 is more than or equal to 0.97 (the current channel state information of the terminal is similar to the channel state information obtained based on the CSI-RS1 before), the terminal uses the first shared resource to send the data, if the distance between the geographical position Y of the terminal and the geographical position X is more than 0.3 m and less than or equal to 1 m (the distance of the terminal moving in the period is considered, it can be considered that channel state information may change in this period of time, so that the terminal needs to retransmit a sounding reference signal to enable the base station to obtain a spatial fingerprint corresponding to the terminal) or an inner product of channel state information vectors H1 and H2 is less than 0.97 and greater than or equal to 0.9 (which indicates that the current channel state information of the terminal and the channel state information obtained based on CSI-RS1 before have changed a little), the terminal determines a second sounding reference signal resource according to the second sounding reference signal resource set information, determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, transmits the second sounding reference signal sequence on the second sounding reference signal resource, and transmits data using a second shared resource; if the distance between the geographic position Y of the terminal and the geographic position X is greater than 1 meter (which indicates that the terminal has moved a relatively large distance in this period of time, the channel state information changes relatively quickly, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), or the inner product of the channel state information vectors H1 and H2 is less than 0.9 (which indicates that the current channel state information of the terminal has changed greatly from the channel state information obtained previously based on CSI-RS1, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), the terminal selects a spreading sequence from a spreading sequence set to spread the data, and then transmits the data by using a third shared resource. Preferably, the data carries identification information of the terminal, and the reason for this is that the base station does not know which terminal is sending information on the shared resource, so it needs to carry a specific terminal identification in the data.
And if the terminal does not receive successful receiving information fed back by the base station after the terminal uses the first shared resource to send data, the terminal determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the second sounding reference signal sequence on the second sounding reference signal resource and uses the second shared resource to send data. And if the terminal does not receive the successful receiving information fed back by the base station after the terminal uses the second shared resource to send the data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses a third shared resource to send the data. The advantage of this is that the terminal sends data using the more robust shared resource, and the hierarchical transmission of data is realized.
If the terminal does not receive the successful receiving information fed back by the base station after sending data by using the third shared resource, which indicates that there may be a plurality of terminals sending data on the shared resource and the interference between the terminals is very large, the terminal sends the resource information according to the over-collision indication information and sends the over-collision indication information to the base station, and the base station is expected to help the terminal to transmit data by using other methods, so as to improve the spectrum efficiency of the system. Preferably, the terminal must be a terminal that supports the D2D mode of operation.
After receiving the over-collision indication information, the base station sends D2D (Device to Device) mode configuration information in a broadcast mode, and requests the terminal set supporting the D2D mode to receive the D2D mode configuration information and enter a D2D working mode, wherein the terminal set does not include a terminal which needs to send data to the base station, so that the terminal which has failed data transmission and supports the D2D mode searches peripheral D2D terminals to help the terminal to transmit data to the base station, thereby improving the probability of successful data reception and further improving the spectrum efficiency of the system.
And after receiving the D2D mode configuration information, the terminal sending the over-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.
The terminal successfully receiving the data in the terminal set forms a terminal subset, and the terminal (called relay terminal) in the terminal subset selects no more than Z relay terminals from the terminal subset to send data to the base station according to the formula Px ═ 2 power ^ CQI, so that the relay terminal with the largest electric quantity can assist the terminal to retransmit the data as much as possible, and the problem that the terminal with the smallest electric quantity can not retransmit the data due to the electric quantity of the terminal itself, wherein the power identifies the available electric quantity of the relay terminal, the CQI represents the channel quality information between the relay terminal and the base station, and Z ═ is rounded up (bit number of data/64).
Example 7:
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, and the first configuration information at least comprises: the number of receiving antennas of the base station is information, and if the number of receiving antennas M 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. It should be noted that the more the number of receiving antennas is, the stronger the capability of the base station to distinguish the terminal through the spatial information is, and the more the available spatial fingerprint information is, so that the base station can effectively distinguish the terminal by acquiring the uplink channel of the terminal, thereby improving the spectrum efficiency of the system.
The terminal receives first configuration information, determines a channel state information vector H1 according to a downlink channel state reference signal CSI-RS1, determines a first sounding reference signal resource set according to the first sounding reference signal resource set information if the first configuration information contains the first sounding reference signal resource set information and the first sounding reference signal sequence set information, determines a first sounding reference signal sequence set according to the first sounding reference signal resource set information, selects a first sounding reference signal resource from the first sounding reference signal resource set according to the first sounding reference signal resource, selects a first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and sends the first sounding reference signal sequence on the first sounding reference signal resource.
The base station receives a first sounding reference signal sequence sent by the terminal, and determines a first spatial fingerprint according to the first sounding reference signal sequence.
The base station sends second configuration information to the terminal, wherein the second configuration information at least comprises configuration information of a downlink channel state information reference signal CSI-RS2, first shared resource information, second sounding reference signal resource set information and second sounding reference signal sequence set information corresponding to the second shared resource, third shared resource information, spread spectrum sequence set information when the third shared resource is used for sending data, and over-strong indication information is used for sending the resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to allow the terminal to perform data retransmission through the second shared resource and/or the third shared resource if the base station cannot successfully receive uplink data sent by each terminal due to relatively large interference between data sent by multiple terminals on the first shared resource, and the probability of data collision on the second shared resource and the third shared resource is reduced.
The terminal receives the second configuration information, when the terminal has data to send, the terminal determines the geographical position Y of the terminal, 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 a channel state information vector H2, if the distance between the geographical position Y of the terminal and the geographical position X is less than or equal to 0.3 m (the distance of the terminal moving in the period is very short, and the channel state information does not change in the period can be considered) or the inner product of the channel state information vectors H1 and H2 is more than or equal to 0.97 (the current channel state information of the terminal is similar to the channel state information obtained based on the CSI-RS1 before), the terminal uses the first shared resource to send the data, if the distance between the geographical position Y of the terminal and the geographical position X is more than 0.3 m and less than or equal to 1 m (the distance of the terminal moving in the period is considered, it can be considered that channel state information may change in this period of time, so that the terminal needs to retransmit a sounding reference signal to enable the base station to obtain a spatial fingerprint corresponding to the terminal) or an inner product of channel state information vectors H1 and H2 is less than 0.97 and greater than or equal to 0.9 (which indicates that the current channel state information of the terminal and the channel state information obtained based on CSI-RS1 before have changed a little), the terminal determines a second sounding reference signal resource according to the second sounding reference signal resource set information, determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, transmits the second sounding reference signal sequence on the second sounding reference signal resource, and transmits data using a second shared resource; if the distance between the geographic position Y of the terminal and the geographic position X is greater than 1 meter (which indicates that the terminal has moved a relatively large distance in this period of time, the channel state information changes relatively quickly, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), or the inner product of the channel state information vectors H1 and H2 is less than 0.9 (which indicates that the current channel state information of the terminal has changed greatly from the channel state information obtained previously based on CSI-RS1, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), the terminal selects a spreading sequence from a spreading sequence set to spread the data, and then transmits the data by using a third shared resource. Preferably, if the terminal transmits data using the first shared resource, the base station receives the data based on the first spatial fingerprint; if the terminal uses the second shared resource to transmit data, the base station receives data based on the second spatial fingerprint, and the second spatial fingerprint is obtained based on the second sounding reference signal sequence received by the base station, which is because when the number of antennas is large, the channel information on the multiple antennas is generally orthogonal, so that the data transmitted to the base station by different terminals on the shared resource can be decoded by the orthogonal channel information (spatial fingerprint), thereby reducing the usage amount of resources and improving the spectrum efficiency of the system.
And if the terminal does not receive successful receiving information fed back by the base station after the terminal uses the first shared resource to send data, the terminal determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the second sounding reference signal sequence on the second sounding reference signal resource and uses the second shared resource to send data. And if the terminal does not receive the successful receiving information fed back by the base station after the terminal uses the second shared resource to send the data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses a third shared resource to send the data. The advantage of this is that the terminal sends data using the more robust shared resource, and the hierarchical transmission of data is realized.
If the terminal does not receive the successful receiving information fed back by the base station after sending data by using the third shared resource, which indicates that there may be a plurality of terminals sending data on the shared resource and the interference between the terminals is very large, the terminal sends the resource information according to the over-collision indication information and sends the over-collision indication information to the base station, and the base station is expected to help the terminal to transmit data by using other methods, so as to improve the spectrum efficiency of the system. Preferably, the terminal must be a terminal that supports the D2D mode of operation.
After receiving the over-collision indication information, the base station sends D2D (Device to Device) mode configuration information in a broadcast mode, and requests the terminal set supporting the D2D mode to receive the D2D mode configuration information and enter a D2D working mode, wherein the terminal set does not include a terminal which needs to send data to the base station, so that the terminal which has failed data transmission and supports the D2D mode searches peripheral D2D terminals to help the terminal to transmit data to the base station, thereby improving the probability of successful data reception and further improving the spectrum efficiency of the system.
And after receiving the D2D mode configuration information, the terminal sending the over-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.
The terminal successfully receiving the data in the terminal set forms a terminal subset, and the terminal (called relay terminal) in the terminal subset selects no more than Z relay terminals from the terminal subset to send data to the base station according to the formula Px ═ 2 power ^ CQI, so that the relay terminal with the largest electric quantity can assist the terminal to retransmit the data as much as possible, and the problem that the terminal with the smallest electric quantity can not retransmit the data due to the electric quantity of the terminal itself, wherein the power identifies the available electric quantity of the relay terminal, the CQI represents the channel quality information between the relay terminal and the base station, and Z ═ is rounded up (bit number of data/64).
Example 8:
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, and the first configuration information at least comprises: the number of receiving antennas of the base station is information, and if the number of receiving antennas M 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. It should be noted that the more the number of receiving antennas is, the stronger the capability of the base station to distinguish the terminal through the spatial information is, and the more the available spatial fingerprint information is, so that the base station can effectively distinguish the terminal by acquiring the uplink channel of the terminal, thereby improving the spectrum efficiency of the system.
The terminal receives first configuration information, determines a channel state information vector H1 according to a downlink channel state reference signal CSI-RS1, determines a first sounding reference signal resource set according to the first sounding reference signal resource set information if the first configuration information contains the first sounding reference signal resource set information and the first sounding reference signal sequence set information, determines a first sounding reference signal sequence set according to the first sounding reference signal resource set information, selects a first sounding reference signal resource from the first sounding reference signal resource set according to the first sounding reference signal resource, selects a first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and sends the first sounding reference signal sequence on the first sounding reference signal resource.
The base station receives a first sounding reference signal sequence sent by the terminal, and determines a first spatial fingerprint according to the first sounding reference signal sequence.
The base station sends second configuration information to the terminal, wherein the second configuration information at least comprises configuration information of a downlink channel state information reference signal CSI-RS2, first shared resource information, second sounding reference signal resource set information and second sounding reference signal sequence set information corresponding to the second shared resource, third shared resource information, spread spectrum sequence set information when the third shared resource is used for sending data, and over-strong indication information is used for sending the resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to allow the terminal to perform data retransmission through the second shared resource and/or the third shared resource if the base station cannot successfully receive uplink data sent by each terminal due to relatively large interference between data sent by multiple terminals on the first shared resource, and the probability of data collision on the second shared resource and the third shared resource is reduced.
The terminal receives the second configuration information, when the terminal has data to send, the terminal determines the geographical position Y of the terminal, 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 a channel state information vector H2, if the distance between the geographical position Y of the terminal and the geographical position X is less than or equal to 0.3 m (the distance of the terminal moving in the period is very short, and the channel state information does not change in the period can be considered) or the inner product of the channel state information vectors H1 and H2 is more than or equal to 0.97 (the current channel state information of the terminal is similar to the channel state information obtained based on the CSI-RS1 before), the terminal uses the first shared resource to send the data, if the distance between the geographical position Y of the terminal and the geographical position X is more than 0.3 m and less than or equal to 1 m (the distance of the terminal moving in the period is considered, it can be considered that channel state information may change in this period of time, so that the terminal needs to retransmit a sounding reference signal to enable the base station to obtain a spatial fingerprint corresponding to the terminal) or an inner product of channel state information vectors H1 and H2 is less than 0.97 and greater than or equal to 0.9 (which indicates that the current channel state information of the terminal and the channel state information obtained based on CSI-RS1 before have changed a little), the terminal determines a second sounding reference signal resource according to the second sounding reference signal resource set information, determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, transmits the second sounding reference signal sequence on the second sounding reference signal resource, and transmits data using a second shared resource; if the distance between the geographic position Y of the terminal and the geographic position X is greater than 1 meter (which indicates that the terminal has moved a relatively large distance in this period of time, the channel state information changes relatively quickly, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), or the inner product of the channel state information vectors H1 and H2 is less than 0.9 (which indicates that the current channel state information of the terminal has changed greatly from the channel state information obtained previously based on CSI-RS1, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), the terminal selects a spreading sequence from a spreading sequence set to spread the data, and then transmits the data by using a third shared resource. Preferably, the difference between the downlink channel state information reference signal CSI-RS2 and the second shared resource is not more than 2ms before the downlink channel state information reference signal CSI-RS2 is located in the time domain, which has the advantage that the terminal can accurately know whether the channel used for sending data is consistent with the channel obtained based on CSI-RS1 before; the second sounding reference signal resource is located before the second shared resource in the time domain, and the difference is not more than 0.5ms, so that the base station can obtain an accurate second spatial fingerprint, and the base station is helped to improve the probability of successfully receiving data on the second shared resource.
And if the terminal does not receive successful receiving information fed back by the base station after the terminal uses the first shared resource to send data, the terminal determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the second sounding reference signal sequence on the second sounding reference signal resource and uses the second shared resource to send data. And if the terminal does not receive the successful receiving information fed back by the base station after the terminal uses the second shared resource to send the data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses a third shared resource to send the data. The advantage of this is that the terminal sends data using the more robust shared resource, and the hierarchical transmission of data is realized.
If the terminal does not receive the successful receiving information fed back by the base station after sending data by using the third shared resource, which indicates that there may be a plurality of terminals sending data on the shared resource and the interference between the terminals is very large, the terminal sends the resource information according to the over-collision indication information and sends the over-collision indication information to the base station, and the base station is expected to help the terminal to transmit data by using other methods, so as to improve the spectrum efficiency of the system. Preferably, the terminal must be a terminal that supports the D2D mode of operation.
After receiving the over-collision indication information, the base station sends D2D (Device to Device) mode configuration information in a broadcast mode, and requests the terminal set supporting the D2D mode to receive the D2D mode configuration information and enter a D2D working mode, wherein the terminal set does not include a terminal which needs to send data to the base station, so that the terminal which has failed data transmission and supports the D2D mode searches peripheral D2D terminals to help the terminal to transmit data to the base station, thereby improving the probability of successful data reception and further improving the spectrum efficiency of the system.
And after receiving the D2D mode configuration information, the terminal sending the over-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.
The terminal successfully receiving the data in the terminal set forms a terminal subset, and the terminal (called relay terminal) in the terminal subset selects no more than Z relay terminals from the terminal subset to send data to the base station according to the formula Px ═ 2 power ^ CQI, so that the relay terminal with the largest electric quantity can assist the terminal to retransmit the data as much as possible, and the problem that the terminal with the smallest electric quantity can not retransmit the data due to the electric quantity of the terminal itself, wherein the power identifies the available electric quantity of the relay terminal, the CQI represents the channel quality information between the relay terminal and the base station, and Z ═ is rounded up (bit number of data/64).
Example 9:
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, and the first configuration information at least comprises: the number of receiving antennas of the base station is information, and if the number of receiving antennas M 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. It should be noted that the more the number of receiving antennas is, the stronger the capability of the base station to distinguish the terminal through the spatial information is, and the more the available spatial fingerprint information is, so that the base station can effectively distinguish the terminal by acquiring the uplink channel of the terminal, thereby improving the spectrum efficiency of the system.
The terminal receives first configuration information, determines a channel state information vector H1 according to a downlink channel state reference signal CSI-RS1, determines a first sounding reference signal resource set according to the first sounding reference signal resource set information if the first configuration information contains the first sounding reference signal resource set information and the first sounding reference signal sequence set information, determines a first sounding reference signal sequence set according to the first sounding reference signal resource set information, selects a first sounding reference signal resource from the first sounding reference signal resource set according to the first sounding reference signal resource, selects a first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and sends the first sounding reference signal sequence on the first sounding reference signal resource.
The base station receives a first sounding reference signal sequence sent by the terminal, and determines a first spatial fingerprint according to the first sounding reference signal sequence.
The base station sends second configuration information to the terminal, wherein the second configuration information at least comprises configuration information of a downlink channel state information reference signal CSI-RS2, first shared resource information, second sounding reference signal resource set information and second sounding reference signal sequence set information corresponding to the second shared resource, third shared resource information, spread spectrum sequence set information when the third shared resource is used for sending data, and over-strong indication information is used for sending the resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to allow the terminal to perform data retransmission through the second shared resource and/or the third shared resource if the base station cannot successfully receive uplink data sent by each terminal due to relatively large interference between data sent by multiple terminals on the first shared resource, and the probability of data collision on the second shared resource and the third shared resource is reduced.
The terminal receives the second configuration information, when the terminal has data to send, the terminal determines the geographical position Y of the terminal, 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 a channel state information vector H2, if the distance between the geographical position Y of the terminal and the geographical position X is less than or equal to 0.3 m (the distance of the terminal moving in the period is very short, and the channel state information does not change in the period can be considered) or the inner product of the channel state information vectors H1 and H2 is more than or equal to 0.97 (the current channel state information of the terminal is similar to the channel state information obtained based on the CSI-RS1 before), the terminal uses the first shared resource to send the data, if the distance between the geographical position Y of the terminal and the geographical position X is more than 0.3 m and less than or equal to 1 m (the distance of the terminal moving in the period is considered, it can be considered that channel state information may change in this period of time, so that the terminal needs to retransmit a sounding reference signal to enable the base station to obtain a spatial fingerprint corresponding to the terminal) or an inner product of channel state information vectors H1 and H2 is less than 0.97 and greater than or equal to 0.9 (which indicates that the current channel state information of the terminal and the channel state information obtained based on CSI-RS1 before have changed a little), the terminal determines a second sounding reference signal resource according to the second sounding reference signal resource set information, determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, transmits the second sounding reference signal sequence on the second sounding reference signal resource, and transmits data using a second shared resource; if the distance between the geographic position Y of the terminal and the geographic position X is greater than 1 meter (which indicates that the terminal has moved a relatively large distance in this period of time, the channel state information changes relatively quickly, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), or the inner product of the channel state information vectors H1 and H2 is less than 0.9 (which indicates that the current channel state information of the terminal has changed greatly from the channel state information obtained previously based on CSI-RS1, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), the terminal selects a spreading sequence from a spreading sequence set to spread the data, and then transmits the data by using a third shared resource.
And if the terminal does not receive successful receiving information fed back by the base station after the terminal uses the first shared resource to send data, the terminal determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the second sounding reference signal sequence on the second sounding reference signal resource and uses the second shared resource to send data. And if the terminal does not receive the successful receiving information fed back by the base station after the terminal uses the second shared resource to send the data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses a third shared resource to send the data. The advantage of this is that the terminal sends data using the more robust shared resource, and the hierarchical transmission of data is realized.
If the terminal does not receive the successful receiving information fed back by the base station after sending data by using the third shared resource, which indicates that there may be a plurality of terminals sending data on the shared resource and the interference between the terminals is very large, the terminal sends the resource information according to the over-collision indication information and sends the over-collision indication information to the base station, and the base station is expected to help the terminal to transmit data by using other methods, so as to improve the spectrum efficiency of the system. Preferably, the terminal must be a terminal that supports the D2D mode of operation. Preferably, the terminal sends the over-collision indication information with full power, where the over-collision indication information is a sequence shared by multiple terminals, which has the advantage that it is possible to make the base station know that a collision occurs on a shared resource by sending the same sequence on the same time-frequency resource by one or more terminals, and then make a subsequent decision to perform data transmission in a D2D manner.
After receiving the over-collision indication information, the base station sends D2D (Device to Device) mode configuration information in a broadcast mode, and requests the terminal set supporting the D2D mode to receive the D2D mode configuration information and enter a D2D working mode, wherein the terminal set does not include a terminal which needs to send data to the base station, so that the terminal which has failed data transmission and supports the D2D mode searches peripheral D2D terminals to help the terminal to transmit data to the base station, thereby improving the probability of successful data reception and further improving the spectrum efficiency of the system.
And after receiving the D2D mode configuration information, the terminal sending the over-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.
The terminal successfully receiving the data in the terminal set forms a terminal subset, and the terminal (called relay terminal) in the terminal subset selects no more than Z relay terminals from the terminal subset to send data to the base station according to the formula Px ═ 2 power ^ CQI, so that the relay terminal with the largest electric quantity can assist the terminal to retransmit the data as much as possible, and the problem that the terminal with the smallest electric quantity can not retransmit the data due to the electric quantity of the terminal itself, wherein the power identifies the available electric quantity of the relay terminal, the CQI represents the channel quality information between the relay terminal and the base station, and Z ═ is rounded up (bit number of data/64).
Example 10:
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, and the first configuration information at least comprises: the number of receiving antennas of the base station is information, and if the number of receiving antennas M 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. It should be noted that the more the number of receiving antennas is, the stronger the capability of the base station to distinguish the terminal through the spatial information is, and the more the available spatial fingerprint information is, so that the base station can effectively distinguish the terminal by acquiring the uplink channel of the terminal, thereby improving the spectrum efficiency of the system.
The terminal receives first configuration information, determines a channel state information vector H1 according to a downlink channel state reference signal CSI-RS1, determines a first sounding reference signal resource set according to the first sounding reference signal resource set information if the first configuration information contains the first sounding reference signal resource set information and the first sounding reference signal sequence set information, determines a first sounding reference signal sequence set according to the first sounding reference signal resource set information, selects a first sounding reference signal resource from the first sounding reference signal resource set according to the first sounding reference signal resource, selects a first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and sends the first sounding reference signal sequence on the first sounding reference signal resource.
The base station receives a first sounding reference signal sequence sent by the terminal, and determines a first spatial fingerprint according to the first sounding reference signal sequence.
The base station sends second configuration information to the terminal, wherein the second configuration information at least comprises configuration information of a downlink channel state information reference signal CSI-RS2, first shared resource information, second sounding reference signal resource set information and second sounding reference signal sequence set information corresponding to the second shared resource, third shared resource information, spread spectrum sequence set information when the third shared resource is used for sending data, and over-strong indication information is used for sending the resource information. It should be noted that the purpose of configuring the second shared resource and the third shared resource is to allow the terminal to perform data retransmission through the second shared resource and/or the third shared resource if the base station cannot successfully receive uplink data sent by each terminal due to relatively large interference between data sent by multiple terminals on the first shared resource, and the probability of data collision on the second shared resource and the third shared resource is reduced.
The terminal receives the second configuration information, when the terminal has data to send, the terminal determines the geographical position Y of the terminal, 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 a channel state information vector H2, if the distance between the geographical position Y of the terminal and the geographical position X is less than or equal to 0.3 m (the distance of the terminal moving in the period is very short, and the channel state information does not change in the period can be considered) or the inner product of the channel state information vectors H1 and H2 is more than or equal to 0.97 (the current channel state information of the terminal is similar to the channel state information obtained based on the CSI-RS1 before), the terminal uses the first shared resource to send the data, if the distance between the geographical position Y of the terminal and the geographical position X is more than 0.3 m and less than or equal to 1 m (the distance of the terminal moving in the period is considered, it can be considered that channel state information may change in this period of time, so that the terminal needs to retransmit a sounding reference signal to enable the base station to obtain a spatial fingerprint corresponding to the terminal) or an inner product of channel state information vectors H1 and H2 is less than 0.97 and greater than or equal to 0.9 (which indicates that the current channel state information of the terminal and the channel state information obtained based on CSI-RS1 before have changed a little), the terminal determines a second sounding reference signal resource according to the second sounding reference signal resource set information, determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, transmits the second sounding reference signal sequence on the second sounding reference signal resource, and transmits data using a second shared resource; if the distance between the geographic position Y of the terminal and the geographic position X is greater than 1 meter (which indicates that the terminal has moved a relatively large distance in this period of time, the channel state information changes relatively quickly, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), or the inner product of the channel state information vectors H1 and H2 is less than 0.9 (which indicates that the current channel state information of the terminal has changed greatly from the channel state information obtained previously based on CSI-RS1, and the base station is likely to be unable to receive the data transmitted by the terminal by means of the spatial fingerprint), the terminal selects a spreading sequence from a spreading sequence set to spread the data, and then transmits the data by using a third shared resource.
And if the terminal does not receive successful receiving information fed back by the base station after the terminal uses the first shared resource to send data, the terminal determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, and the terminal sends the second sounding reference signal sequence on the second sounding reference signal resource and uses the second shared resource to send data. And if the terminal does not receive the successful receiving information fed back by the base station after the terminal uses the second shared resource to send the data, the terminal selects a spreading sequence from the spreading sequence set to spread the data, and then uses a third shared resource to send the data. The advantage of this is that the terminal sends data using the more robust shared resource, and the hierarchical transmission of data is realized.
If the terminal does not receive the successful receiving information fed back by the base station after sending data by using the third shared resource, which indicates that there may be a plurality of terminals sending data on the shared resource and the interference between the terminals is very large, the terminal sends the resource information according to the over-collision indication information and sends the over-collision indication information to the base station, and the base station is expected to help the terminal to transmit data by using other methods, so as to improve the spectrum efficiency of the system. Preferably, the terminal must be a terminal that supports the D2D mode of operation. Preferably, the terminal sends the over-collision indication information with full power, wherein the over-collision indication information is a sequence shared by multiple terminals, which has the advantage that it is possible to let the base station know that a collision occurs on a shared resource by sending the same sequence on the same time-frequency resource by one or more terminals, and then make a subsequent decision to perform data transmission in a D2D manner.
After receiving the over-collision indication information, the base station sends D2D (Device to Device) mode configuration information in a broadcast mode, and requests the terminal set supporting the D2D mode to receive the D2D mode configuration information and enter a D2D working mode, wherein the terminal set does not include a terminal which needs to send data to the base station, so that the terminal which has failed data transmission and supports the D2D mode searches peripheral D2D terminals to help the terminal to transmit data to the base station, thereby improving the probability of successful data reception and further improving the spectrum efficiency of the system.
And after receiving the D2D mode configuration information, the terminal sending the over-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.
The terminal successfully receiving the data in the terminal set forms a terminal subset, and the terminal (called relay terminal) in the terminal subset selects no more than Z relay terminals from the terminal subset to send data to the base station according to the formula Px ═ 2 power ^ CQI, so that the relay terminal with the largest electric quantity can assist the terminal to retransmit the data as much as possible, and the problem that the terminal with the smallest electric quantity can not retransmit the data due to the electric quantity of the terminal itself, wherein the power identifies the available electric quantity of the relay terminal, the CQI represents the channel quality information between the relay terminal and the base station, and Z ═ is rounded up (bit number of data/64). Preferably, the relay terminals in the terminal subset that need to send data to the base station use the same time-frequency resource and different demodulation pilot sequences to send data to the base station, which has the advantage that the success rate of data reception can be improved by the receiving algorithms such as maximal ratio combining and the like at the base station side.
The above-described embodiments are intended to be illustrative, and not restrictive, of the invention, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (9)

1. A self-adaptive data transmission method of the Internet of things is characterized by comprising the following steps:
s1: 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, wherein the first configuration information at least comprises: receiving antenna number information 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-RS 1;
s3: the base station sends second configuration information to the terminal, wherein the second configuration information comprises: configuration information of a downlink channel state information reference signal CSI-RS2, first shared resource information, second sounding reference signal resource set information and second sounding reference signal sequence set information corresponding to the second shared resource, third shared resource information, spreading sequence set information when data is sent by using the third shared resource, and over-strong indication information sending resource information;
s4: the terminal receives the second configuration information, when the terminal has data to send, the terminal determines the current geographic position Y of the terminal, the terminal determines a channel state information vector H2 according to the configuration information of the downlink channel state information reference signal CSI-RS2, and determines a data sending mode according to the current geographic position Y or the channel state information vector H2,
if the distance between the geographic position Y and the geographic position X of the terminal is less than or equal to 0.3 m or the inner product of the channel state information vectors H1 and H2 is greater than or equal to 0.97, the terminal transmits the data by using a first shared resource, if the distance between the geographic position Y and the geographic position X of the terminal is greater than 0.3 m and less than or equal to 1 m 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 a second sounding reference signal resource according to the second sounding reference signal resource set information, determines a second sounding reference signal sequence according to the second sounding reference signal sequence set information, the terminal transmits the second sounding reference signal sequence on the second sounding reference signal resource, and transmits the data by using the second shared resource; if the distance between the geographic position Y and the geographic position X of the terminal is more 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 spreading sequence set to spread the data, and then transmits the data by using the third shared resource;
s5: after the terminal sends the data, if the terminal does not receive the successful receiving information fed back by the base station, the terminal sends resource information according to the over-collision indication information and sends the over-collision indication information to the base station;
s6: after receiving the over-collision indication information, the base station sends D2D mode configuration information in a broadcasting mode, and requires a terminal set supporting a D2D mode to receive the D2D mode configuration information and enter a D2D working mode;
s7: after receiving the D2D mode configuration information, a terminal sending the over-collision indication information determines a D2D resource communicating with the terminal set, and the terminal sends data to the terminal set through the D2D resource;
s8: and the relay terminal which successfully receives the data in the terminal set sends the data to the base station.
2. The adaptive data transmission method for the internet of things 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 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 determines a first sounding reference signal resource set according to the first sounding reference signal resource set information, determines a first sounding reference signal sequence set according to the first sounding reference signal sequence set information, selects a first sounding reference signal resource from the first sounding reference signal resource set by the terminal, selects a first sounding reference signal sequence from the first sounding reference signal sequence set according to the first sounding reference signal resource, and transmits the first sounding reference signal sequence on the first sounding reference signal resource by the terminal;
in step S3, the base station receives the first sounding reference signal sequence sent by the terminal, and determines a first spatial fingerprint according to the first sounding reference signal sequence; a second spatial fingerprint is determined from the second sounding reference signal sequence.
3. The adaptive data transmission method for the internet of things as claimed in 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; and if the terminal uses the second shared resource to send data, the base station receives the data based on a second spatial fingerprint.
4. The adaptive data transmission method for the internet of things as claimed in claim 2, wherein: in step S6, the terminal set does not include the 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 equal to or greater than 1/2 of its maximum power; 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 select no more than Z relay terminals from the terminal subset to transmit the data to the base station according to the formula Px (2 power) × CQI, where power is the available power of the relay terminals, CQI represents the channel quality information between the relay terminals and the base station, and Z is rounded up (bit number of the data/64).
5. The adaptive data transmission method of the internet of things as claimed in any one of claims 1 to 4, wherein: the channel state information vectors H1 and H2 are M × 1-dimensional vectors, where M is the number of antennas.
6. The adaptive data transmission method of the internet of things as claimed in any one of claims 2 to 4, wherein: 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, the first shared resource and the second shared resource are equal in size, and the length N of a spreading sequence in the spreading sequence set is greater than or equal to 2 × M.
7. The adaptive data transmission method for the internet of things as claimed in claim 6, wherein: the third shared resource is N times the size of the first shared resource.
8. The adaptive data transmission method of the internet of things as claimed in any one of claims 1 to 4, wherein: the downlink channel state information reference signal CSI-RS2 is located before the second shared resource in the time domain, and the difference is not more than 2 ms; the second sounding reference signal resource is located before the second shared resource in the time domain, and the difference is not more than 0.5 ms.
9. The adaptive data transmission method for the internet of things as claimed in claim 8, wherein: the data carries identification information of the terminal, and in step S5, the terminal sends the over-collision strength indication information using full power, where the over-collision strength indication information is a sequence shared by multiple terminals; in step S8, the relay terminal that sends the data to the base station using the same time-frequency resource.
CN201910040502.XA 2019-01-16 2019-01-16 Self-adaptive Internet of things data transmission method Active CN109660943B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910040502.XA CN109660943B (en) 2019-01-16 2019-01-16 Self-adaptive Internet of things data transmission method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910040502.XA CN109660943B (en) 2019-01-16 2019-01-16 Self-adaptive Internet of things data transmission method

Publications (2)

Publication Number Publication Date
CN109660943A CN109660943A (en) 2019-04-19
CN109660943B true CN109660943B (en) 2020-10-16

Family

ID=66120383

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910040502.XA Active CN109660943B (en) 2019-01-16 2019-01-16 Self-adaptive Internet of things data transmission method

Country Status (1)

Country Link
CN (1) CN109660943B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110958660A (en) * 2019-12-04 2020-04-03 江苏中控安芯信息安全技术有限公司 Rapid transmission method and system for medical requirement information for intelligent old-age care

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105375962A (en) * 2014-08-25 2016-03-02 中兴通讯股份有限公司 Method for sending and receiving reference signal and communication node
CN107888263A (en) * 2016-09-30 2018-04-06 中兴通讯股份有限公司 The transmission method and device of Physical Downlink Control Channel, base station and terminal

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103763070B (en) * 2010-08-02 2015-03-25 华为技术有限公司 Method and device for notifying reference signal configuration information
EP2807784A1 (en) * 2012-01-27 2014-12-03 Interdigital Patent Holdings, Inc. Systems and/or methods for providing epdcch in a multiple carrier based and/or quasi-collated network
CN103795513B (en) * 2012-10-31 2018-12-21 中兴通讯股份有限公司 A kind of configuration of Downlink Control Information, acquisition methods, base station and terminal
KR102335741B1 (en) * 2015-08-13 2021-12-06 삼성전자주식회사 Scheme for communication using beamformed csi-rs in mobile communication system
EP3346630A4 (en) * 2015-09-03 2019-05-08 LG Electronics Inc. Method for reporting channel state information in wireless communication system and device therefor
CN106658730B (en) * 2016-12-13 2020-02-14 深圳职业技术学院 Transmission method with low control overhead

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105375962A (en) * 2014-08-25 2016-03-02 中兴通讯股份有限公司 Method for sending and receiving reference signal and communication node
CN107888263A (en) * 2016-09-30 2018-04-06 中兴通讯股份有限公司 The transmission method and device of Physical Downlink Control Channel, base station and terminal

Also Published As

Publication number Publication date
CN109660943A (en) 2019-04-19

Similar Documents

Publication Publication Date Title
CN109905915B (en) Internet of things data transmission method of multi-hop network architecture
CN109861805B (en) Data transmission method in narrow-band Internet of things based on beam sensing
CN110521135A (en) The system and method restored for communication beams
CN110140301B (en) Synchronous signal block transmission method, device and storage medium
CN108200556B (en) A kind of highly reliable business transmitting method
CN108306712A (en) A kind of business transmitting method based on cooperation
EP3565132A1 (en) Wave beam selection method, apparatus and system
CN108260134A (en) A kind of method and device of downlink wave beam adjustment
CN113573356B (en) Data processing method in industrial Internet of things
CN108270528B (en) A kind of business transmitting method
CN109873687B (en) Information processing method and system based on signal-to-noise ratio in Internet of things and storage medium
EP3522389B1 (en) Method and apparatus for transmitting physical downlink control channel, and base station and terminal
CN109617665B (en) Grading data transmission method in narrow-band Internet of things
CN109743677B (en) Heterogeneous network-based multi-level data transmission method in narrow-band Internet of things
CN109660943B (en) Self-adaptive Internet of things data transmission method
CN110034911B (en) Method, system and storage medium for fast data transmission in Internet of things
CN105376744A (en) Method and device for clustering coordinated base stations in wireless heterogeneous network
CN110048810B (en) Information sending method, system and storage medium in Internet of things
CN109861804B (en) Data transmission method in narrow-band Internet of things based on D2D architecture
CN114338332B (en) Efficient data transmission method in intelligent industrial Internet of things
CN110048812B (en) Data transmission method, system and storage medium based on transmitting power in Internet of things
CN110012543B (en) Data transmission method, system and storage medium for low control overhead in Internet of things
CN110677894B (en) Network access method of communication node in Internet of things
CN108462949A (en) A kind of business transmitting method based on group
CN108282326B (en) The controllable data transmission method of time delay in a kind of Internet of Things

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant