CN113891293B - Robust data processing method for Internet of things - Google Patents
Robust data processing method for Internet of things Download PDFInfo
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- CN113891293B CN113891293B CN202111220437.2A CN202111220437A CN113891293B CN 113891293 B CN113891293 B CN 113891293B CN 202111220437 A CN202111220437 A CN 202111220437A CN 113891293 B CN113891293 B CN 113891293B
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- 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]
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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Abstract
The invention discloses a robust data processing method of the Internet of things, which comprises the following steps: the first communication node sends a channel state indication information reference signal to the node set; the slave second communication node sends the channel correlation information to the master second communication node; the master control second communication node informs the slave second communication node of grouping information of the second communication node group of the first service type, the second service type and the third service type, and feeds back channel state information of the second communication node group of the first service type, the second service type and the third service type to the first communication node; the first communication node sends data to the second communication node group; if the master control second communication node sends the receiving failure information to the first communication node and the service type of the data is the first service type, the first communication node retransmits the data, and the node sets are required to all receive the data. The invention solves the problem of low data transmission reliability in the existing machine communication and improves the use efficiency of the network.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a robust data processing method of the Internet of things.
Background
The 5G can meet the diversified business demands of people in various areas such as living, working, leisure, traffic and the like, and can provide ultra-high definition video, virtual reality, augmented reality, cloud desktop, online games and other extreme business experiences for users even in the scenes with ultra-high flow 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, wide area coverage and the like. Meanwhile, 5G is also permeated into the fields of Internet of things and various industries and is deeply fused with industrial facilities, medical instruments, vehicles and the like, so that the diversified business requirements of the vertical industries such as industry, medical treatment, traffic and the like are effectively met, and real 'everything interconnection' is realized.
The 5G application scenarios can be divided into two main categories, namely Mobile Broadband (MBB) and internet of things (IoT, internet of Things). Among them, the main technical requirement of mobile broadband access is high capacity, providing high data rate to meet the increasing demand of data service. The internet of things is mainly driven by the requirement of machine Communication (MTC, machine Type Communication), and can be further divided into two types, including low-rate mass machine Communication (MMC, massive Machine Communication) and low-delay high-reliability machine Communication. For mass machine communication with low rate, mass nodes are accessed with low rate, transmitted data packets are usually smaller, the interval time is relatively longer, and the cost and the power consumption of the nodes are also usually low; for machine communication with low time delay and high reliability, the method is mainly oriented to machine communication with relatively high requirements on real-time performance and reliability, such as real-time alarm, real-time monitoring and the like.
In the fifth generation mobile communication system, the core scenario that needs to be studied in depth is machine communication, such as industry 4.0, internet of vehicles, robots, etc., and how to ensure the reliability of data transmission in the intelligent internet of things is a problem to be solved at present.
Based on the analysis, the invention provides a robust data processing method of the Internet of things.
Disclosure of Invention
The invention mainly aims to provide a robust data processing method of the Internet of things, which aims to improve the reliability of data transmission in the existing machine communication and improve the network use efficiency.
In order to achieve the above object, the present invention provides a robust data processing method of the internet of things, the method comprising the following steps:
The method comprises the steps that a master control second communication node sends first request information to a first communication node, the first communication node is requested to send channel state indication information reference signals, wherein one master control second communication node exists in a node set comprising N second communication nodes, (N-1) slave second communication nodes, N is an integer larger than 3, the electric quantity of the slave second communication nodes is larger than or equal to 70% of the maximum available electric quantity, and the slave second communication nodes do not conduct business data communication with the first communication node in the previous 10 seconds;
After the first communication node receives the first request information, the first communication node sends a channel state indication information reference signal to the node set;
The N second communication nodes obtain channel state information between the first communication node and the N second communication nodes by measurement based on the channel state indication information reference signals, the master control second communication node broadcasts and transmits own channel state information to the (N-1) slave second communication nodes, the (N-1) slave second communication nodes acquire channel correlation information by inner product operation based on the channel state information of the master control second communication node and the own channel state information, and each slave second communication node transmits the channel correlation information obtained by calculation to the master control second communication node;
The master second communication node receives (N-1) channel correlation information, forms a first service type second communication node group, a second service type second communication node group and a third service type second communication node group based on the channel correlation information, wherein the first service type second communication node group at least comprises the master second communication node and the slave second communication node with the lowest channel correlation with the master second communication node, the second service type second communication node group at least comprises the master second communication node and the slave second communication node with the lowest channel correlation and the second lowest channel correlation with the master second communication node, the third service type second communication node group comprises the master second communication node and the (N-1) slave second communication nodes, and the master second communication node informs the first service type second communication node group, the second service type second communication node group and the third service type second communication node group of grouping information to the (N-1) slave second communication nodes;
The master control second communication node generates unified channel state information of the first service type second communication node group based on the channel state information of all the second communication nodes in the first service type second communication node group; the master control second communication node generates unified channel state information of a second communication node group of the second service type based on the channel state information of all the second communication nodes in the second communication node group of the second service type; the master control second communication node generates unified channel state information of a second communication node group of a third service type based on the channel state information of all the second communication nodes in the second communication node group of the third service type; the master control second communication node feeds back the channel state information of the first service type second communication node group, the channel state information of the second service type second communication node group and the channel state information of the third service type second communication node group to the first communication node;
The first communication node determines the service type of data sent to the main control second communication node, and if the service type is a first service type, the first communication node sends the data to the first service type second communication node group according to the channel state information of the first service type second communication node group; if the data is of the second service type, the first communication sends the data to a second communication node group of the second service type according to the channel state information of the second communication node group of the second service type; if the data is of the third service type, the first communication node sends the data to a second communication node group of the third service type according to the channel state information of the second communication node group of the third service type;
If the master second communication node sends the receiving failure information to the first communication node and the service type of the data is the first service type, the first communication node retransmits the data and requests the master second communication node and the (N-1) slave second communication nodes to receive the data.
The distance between the master control second communication node and the slave second communication node is not more than M meters, wherein the value of M is 5 or the master control second communication node and the first communication node are confirmed through negotiation.
The invention further adopts the technical scheme that the first service type is a low-delay high-reliability service, the second service type is a mobile broadband service, and the third service type is a machine type communication service.
When the value of N is greater than 8, the first service type second communication node group comprises the main control second communication node and three subordinate second communication nodes with the lowest channel relativity with the main control second communication node; the second service type second communication node group comprises the main control second communication node and N/2 slave second communication nodes with the lowest channel correlation with the main control second communication node, wherein N/2 is an integer.
The method comprises the following steps that the subordinate second communication node determines whether the subordinate second communication node needs to receive the data or not based on the service type identifier of the data carried in the physical downlink control information sent by the first communication node.
The invention further adopts the technical scheme that the master control second communication node and the slave second communication node in the first service type second communication node group use respective maximum transmitting power for communication.
The invention further adopts the technical scheme that half of the maximum transmission power of each is used for communication between the master second communication node in the second service type second communication node group and the slave second communication nodes except the first service type second communication node group.
The method comprises the steps that the master control second communication node in the third service type second communication node group and the slave second communication nodes except the second service type second communication node group use determined transmitting power to communicate, and the determined transmitting power is one tenth of the maximum transmitting power of each plus path loss between the master control second communication node and the slave second communication node.
The method comprises the following steps that if the slave second communication node attempting to receive data successfully decodes the data, the slave second communication node sends receiving success information to the master second communication node, and if the slave second communication node fails to successfully decode the data, the slave second communication node sends receiving failure information to the master second communication node, wherein the slave second communication node sends receiving success information to the master second communication node by using maximum transmitting power. The main control second communication node which receives the successful receiving information directly sends the successful receiving information to the first communication node; and if the master control second communication node receives the receiving failure information and the master control second communication node fails to decode the data, the master control second communication node feeds back the receiving failure information to the first communication node.
The further technical scheme of the invention is that if the service type of the data is a second data service type, half of the maximum transmitting power of each is used for communication between the master second communication node and the slave second communication node in the second communication node group of the second service type; and if the service type of the data is a third data service type, communicating between the master second communication node and the slave second communication node in the third service type second communication node group by using determined transmitting power, wherein the determined transmitting power is one tenth of the respective maximum transmitting power plus the path loss between the master second communication node and the slave second communication node.
The robust data processing method of the Internet of things has the beneficial effects that: by adopting the technical scheme, the invention solves the problem of low data transmission reliability in the existing machine communication, and improves the use efficiency of the network.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a first embodiment of a robust data processing method of the internet of things of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
First embodiment
Referring to fig. 1, fig. 1 is a flowchart of a first embodiment of a robust data processing method for internet of things according to the present invention.
As shown in fig. 1, in this embodiment, the robust data processing method of the internet of things includes the following steps:
S102, in a node set comprising N terminals (second communication nodes), one master control terminal (master control second communication node) exists, and (N-1) slave terminals (slave second communication nodes) send first request information to a base station (first communication node) to request the base station to send a channel state indication information reference signal, wherein N is an integer greater than 3, the electric quantity of the slave terminals is greater than or equal to 70% of the maximum available electric quantity, and the slave terminals do not communicate service data with the base station in the previous 10 seconds.
The reason for this is that by analyzing the data transmission behavior and the available power of the slave terminal, the future own service demand of the slave terminal is predicted to be smaller, so that the master terminal is helped to receive the data, and the own service of the slave terminal is not influenced.
S104, after receiving the first request information, the base station sends a channel state indication information reference signal to the node set.
The purpose of this is that the terminals in the node set can measure the downlink channel state information between the base station and themselves based on the reference signal.
S106, N terminals obtain channel state information between the base station and N terminals based on channel state indication information reference signals, the master control terminal broadcasts and transmits own channel state information to (N-1) slave terminals, the (N-1) slave terminals obtain channel correlation information based on the channel state information of the master control terminal and the own channel state information through inner product operation, and each slave terminal transmits the channel correlation information obtained by calculation to the master control terminal.
The purpose of this is that the master terminal determines the terminal composition of the subsequent terminal group by collecting these channel state information.
S108, the main control terminal receives the (N-1) pieces of channel correlation information and forms a first service type terminal group, a second service type terminal group and a third service type terminal group based on the channel correlation information.
The first service type terminal group at least comprises a main control terminal and a slave terminal with the lowest channel correlation with the main control terminal, and the advantage of the first service type is that the first service type is a low-delay high-reliability service, and the diversity characteristic of the channel can be fully utilized to improve the probability of successful data transmission by using a plurality of channels with the lowest correlation to carry out repeated transmission of the same data, so that the requirements of the service can be better met under the condition that a small number of terminals participate in complex decoding.
The second service type terminal group at least comprises a master terminal and a slave terminal with the lowest channel correlation with the master terminal and the lowest channel correlation with the slave terminal. The advantage of this is that the second type of service is mobile broadband service, the service has higher requirement on the spectrum efficiency of the system, and the multiplexing transmission of the service is realized by fully utilizing the orthogonal characteristic of the channel, so that the utilization efficiency of spectrum resources is improved, and the transmission requirement of the service is met under the condition that as few terminals participate in complex decoding as possible.
The third service type terminal group comprises a master control terminal and (N-1) slave terminals, and the reason for this is that the third service type is machine type communication, the transmission data volume is smaller, the decoding complexity is not high, and more terminals can be used for decoding operation, so that the service quality of the service is improved.
The master terminal notifies the grouping information of the first service type terminal group, the second service type terminal group and the third service type terminal group to the (N-1) slave terminals.
S110, the master control terminal generates unified channel state information of a first service type terminal group based on the channel state information of all terminals in the first service type terminal group; the master control terminal generates unified channel state information of the second service type terminal group based on the channel state information of all terminals in the second service type terminal group; the master control terminal generates unified channel state information of the third service type terminal group based on the channel state information of all terminals in the third service type terminal group; the main control terminal feeds back the channel state information of the first service type terminal group, the channel state information of the second service type terminal group and the channel state information of the third service type terminal group to the base station.
The method has the advantages that the main control terminal feeds back various channel state information to the base station, and the base station can select proper channel state information according to service transmission requirements to generate downlink control information to guide the terminal to receive data.
S112, the base station determines the service type of the data sent to the main control terminal, if the service type is the first service type, the base station sends the data to the first service type terminal group according to the channel state information of the first service type terminal group; if the service is the second service type, the first communication sends data to the terminal group of the second service type according to the channel state information of the terminal group of the second service type; and if the service is of the third service type, the base station transmits data to the terminal group of the third service type according to the channel state information of the terminal group of the third service type.
S114, if the master terminal sends the receiving failure information to the base station and the service type of the data is the first service type, the base station retransmits the data and requests the master terminal and (N-1) slave terminals to receive the data.
The reason for doing so is that the probability of successful decoding of the retransmission data is improved by adding a plurality of terminals to carry out complex decoding operation, and the transmission requirement of low-delay high-reliability service is met as much as possible.
Second embodiment
Based on the first embodiment shown in fig. 1, a second embodiment of the robust data processing method of the internet of things of the present invention is provided.
In this embodiment, the distance between the master terminal and the slave terminal does not exceed M meters, where the value of M is 5 or is confirmed by negotiation between the master terminal and the base station. The reason for this is that the system can select the appropriate M value to form the node set according to the distribution of the terminals.
Third embodiment
Based on the first embodiment shown in fig. 1, a third embodiment of the robust data processing method of the internet of things of the present invention is provided.
In this embodiment, the first service type is a low-latency high-reliability service, the second service type is a mobile broadband service, and the third service type is a machine type communication service. The first traffic type and the second traffic type have a relatively high decoding complexity and the third traffic type has a relatively low decoding complexity.
Fourth embodiment
Based on the first embodiment shown in fig. 1, a fourth embodiment of the robust data processing method of the internet of things of the present invention is provided.
In this embodiment, when the value of N is greater than 8, the first service type terminal group includes a master terminal and three slave terminals with the lowest channel correlation with the master terminal; the second service type terminal group includes a master terminal and up-rounded (N/2) slave terminals having the lowest channel correlation with the master terminal. The method has the advantages that when the number of the terminals in the node set is relatively large, the terminals supplement electric quantity through other means, so that more terminals can participate in data transmission of the first service type and the second service type as much as possible, and the service quality of the two service types is improved.
Fifth embodiment
Based on the first embodiment shown in fig. 1, a fourth embodiment of the robust data processing method of the internet of things of the present invention is provided.
In this embodiment, the slave terminal determines whether to receive data based on the service type identifier of the data carried in the physical downlink control information sent by the base station. The method has the advantage of avoiding the waste of terminal electric quantity caused by the fact that all terminals in the node set try to receive data.
Sixth embodiment
Based on the first embodiment shown in fig. 1, a sixth embodiment of the robust data processing method of the internet of things of the present invention is provided.
In this embodiment, the master terminal and the slave terminal in the first service type terminal group use respective maximum transmission powers for communication. The reason for this is that the first service type is a low-delay high-reliability service type, and the service quality of the service type can be effectively improved by maximizing the transmitting power.
Seventh embodiment
Based on the first embodiment shown in fig. 1, a seventh embodiment of the robust data processing method for the internet of things of the present invention is provided.
In this embodiment, half of the maximum transmission power of each is used for communication between the master terminal and the slave terminals (except the slave terminals in the first service type terminal group) in the second service type terminal group. The reason for this is to reduce the power consumption of the terminal as much as possible while satisfying the quality of service of the second traffic type.
Eighth embodiment
Based on the first embodiment shown in fig. 1, an eighth embodiment of the robust data processing method for the internet of things of the present invention is provided.
In this embodiment, the master terminal and the slave terminals in the third service type terminal group (except the slave terminals in the second service type terminal group) communicate with each other using the transmission power determined by (one tenth of the maximum transmission power plus the path loss between the master terminal and the slave terminal). The reason for this is to reduce the power consumption of the terminal as much as possible on the premise of meeting the quality of service of the third service type, and to meet the requirement of "green" communication.
Ninth embodiment
Based on the first embodiment shown in fig. 1, a ninth embodiment of the robust data processing method for the internet of things of the present invention is provided.
In this embodiment, if the slave terminal attempting to receive the data successfully decodes the data, the slave terminal sends the reception success information to the master terminal, and if the slave terminal fails to successfully decode the data, the terminal sends the reception failure information to the master terminal, where the slave terminal uses the maximum transmit power to send the reception success information to the master terminal, which has the advantage of ensuring that the reception success information can be received by the master terminal as much as possible, thereby improving the service quality of the whole system. The main control terminal which receives the successful information directly sends the successful information to the base station; if the main control terminal receives the receiving failure information and the main control terminal fails to decode the data, the main control terminal feeds back the receiving failure information to the base station.
Tenth embodiment
Based on the first embodiment shown in fig. 1, a tenth embodiment of the robust data processing method for the internet of things of the present invention is provided.
In this embodiment, if the service type of the data is the second data service type, the master terminal and the slave terminal in the second service type terminal group use half of the maximum transmission power to perform communication; if the traffic type of the data is a third data traffic type, the master terminal and the slave terminal in the third traffic type terminal group communicate using the determined transmit power (one tenth of the respective maximum transmit power plus the path loss between the master terminal and the slave terminal). The method has the advantage of reducing the power consumption of the terminal as much as possible on the premise of meeting the transmission quality of the corresponding service type.
The robust data processing method of the Internet of things has the beneficial effects that: by adopting the technical scheme, the invention solves the problem of low data transmission reliability in the existing machine communication, and improves the use efficiency of the network.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the specification and drawings of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.
Claims (9)
1. A robust internet of things data processing method, the method comprising the steps of:
The method comprises the steps that a master control second communication node sends first request information to a first communication node to request the first communication node to send a channel state indication information reference signal, wherein one master control second communication node exists in a node set comprising N second communication nodes, (N-1) slave second communication nodes, N is an integer larger than 3, the electric quantity of the slave second communication nodes is larger than or equal to 70% of the maximum available electric quantity of the second communication nodes, the slave second communication nodes do not conduct business data communication with the first communication node within 10 seconds before, and the 10 seconds before refer to 10 seconds after the master control second communication nodes send first request information to the first communication node;
After the first communication node receives the first request information, the first communication node sends a channel state indication information reference signal to the node set;
The N second communication nodes obtain channel state information between the first communication node and the N second communication nodes by measurement based on the channel state indication information reference signals, the master control second communication node broadcasts and transmits own channel state information to the (N-1) slave second communication nodes, the (N-1) slave second communication nodes acquire channel correlation information by inner product operation based on the channel state information of the master control second communication node and the own channel state information, and each slave second communication node transmits the channel correlation information obtained by calculation to the master control second communication node;
The master second communication node receives (N-1) the channel correlation information, forms a first service type second communication node group, a second service type second communication node group and a third service type second communication node group based on the channel correlation information, wherein the first service type second communication node group comprises the master second communication node and the slave second communication node with the lowest channel correlation with the master second communication node, the second service type second communication node group comprises the master second communication node and the slave second communication node with the lowest channel correlation and the second lowest channel correlation with the master second communication node, the third service type second communication node group comprises the master second communication node and the (N-1) slave second communication nodes, and the master second communication node informs the first service type second communication node group, the second service type second communication node group and the third service type second communication node group of grouping information to the slave (N-1) second communication node;
The master control second communication node generates unified channel state information of the first service type second communication node group based on the channel state information of all the second communication nodes in the first service type second communication node group; the master control second communication node generates unified channel state information of a second communication node group of the second service type based on the channel state information of all the second communication nodes in the second communication node group of the second service type; the master control second communication node generates unified channel state information of a second communication node group of a third service type based on the channel state information of all the second communication nodes in the second communication node group of the third service type; the master control second communication node feeds back the channel state information of the first service type second communication node group, the channel state information of the second service type second communication node group and the channel state information of the third service type second communication node group to the first communication node;
The first communication node determines the service type of data sent to the main control second communication node, and if the service type is a first service type, the first communication node sends the data to the first service type second communication node group according to the channel state information of the first service type second communication node group; if the data is of the second service type, the first communication node sends the data to a second communication node group of the second service type according to the channel state information of the second communication node group of the second service type; if the data is of the third service type, the first communication node sends the data to a second communication node group of the third service type according to the channel state information of the second communication node group of the third service type;
If the master second communication node sends the receiving failure information to the first communication node and the service type of the data is the first service type, the first communication node retransmits the data and requests the master second communication node and the (N-1) slave second communication nodes to receive the data.
2. The robust internet of things data processing method of claim 1, wherein a distance between the master second communication node and the slave second communication node is no more than M meters, wherein M takes a value of 5 or is confirmed by negotiation between the master second communication node and the first communication node.
3. The robust internet of things data processing method of claim 1, wherein the first service type is a low latency high reliability service, the second service type is a mobile broadband service, and the third service type is a machine type communication service.
4. The robust internet of things data processing method according to claim 1, wherein when the value of N is greater than 8, the first service type second communication node group includes the master second communication node and three slave second communication nodes having the lowest channel correlation with the master second communication node; the second service type second communication node group comprises the master control second communication node and up-rounded N/2 slave second communication nodes with lowest channel correlation with the master control second communication node, wherein N/2 is an integer.
5. The robust internet of things data processing method according to claim 1, wherein the subordinate second communication node determines whether to receive the data itself based on a service type identifier of the data carried in physical downlink control information sent by the first communication node.
6. The robust internet of things data processing method of claim 1, wherein the master second communication node and the slave second communication nodes in the first service type second communication node group communicate using respective maximum transmit powers.
7. The robust internet of things data processing method of claim 1, wherein the master second communication node in the second group of traffic types second communication nodes and the slave second communication nodes in the second group of traffic types second communication nodes communicate using half of their respective maximum transmit powers.
8. The robust internet of things data processing method of claim 1, wherein the master second communication node in the third service type second communication node group and the slave second communication nodes in the second service type second communication node group communicate using a determined transmit power, the determined transmit power being one tenth of a respective maximum transmit power + a path loss between the master second communication node and the slave second communication node.
9. The robust internet of things data processing method according to claim 1, wherein if the traffic type of the data is a second data traffic type, the master second communication node and the slave second communication nodes in the second traffic type second communication node group communicate using half of the respective maximum transmission power; and if the service type of the data is a third data service type, communicating between the master second communication node and the slave second communication node in the third service type second communication node group by using determined transmitting power, wherein the determined transmitting power is one tenth of the respective maximum transmitting power plus the path loss between the master second communication node and the slave second communication node.
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