CN109618357A

CN109618357A - A wireless transmission method and network

Info

Publication number: CN109618357A
Application number: CN201811572227.8A
Authority: CN
Inventors: 任帅; 宋纯贺; 王忠锋; 卢岩; 曾鹏; 于同伟; 吴蒙; 马欣彤; 李桐; 王刚
Original assignee: State Grid Corp of China SGCC; Shenyang Institute of Automation of CAS; Electric Power Research Institute of State Grid Liaoning Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; Shenyang Institute of Automation of CAS; Electric Power Research Institute of State Grid Liaoning Electric Power Co Ltd
Priority date: 2018-12-21
Filing date: 2018-12-21
Publication date: 2019-04-12
Anticipated expiration: 2038-12-21
Also published as: CN109618357B

Abstract

The invention belongs to wireless communication technology fields, and in particular to a kind of radio transmitting method and network.Radio transmitting method of the invention is subregion to be carried out to wireless-transmission network, and different subregions are respectively set to transmission subregion and spare partitions, and sleep scheduling mechanism is used to divide different sleep scheduling strategies for each subregion；Node in data transfer phase, same subregion selects suitable node concurrent transmission using probability forwarding mechanism in subregion；It is transmitted data subregion where start node, until terminal node is properly received.Using the low energy consumption and low latency method of the invention, it is possible to realize data transmission in strip wireless sensor network, especially suitable for needing the strip wireless sensor network application of low latency and low energy consumption.

Description

A kind of radio transmitting method and network

Technical field:

The invention belongs to wireless communication technology fields, and in particular to a kind of radio transmitting method and network.

Background technique:

Strip wireless sensor network (SWSNs) is typically deployed at narrow scope but very long belt-like zone, carries out real When monitoring and data collection, such as carry out gas-monitoring within coal mines, tunnel is only several meters wide but length has dozens of kilometres.It passes Sensor node is usually run in a manner of low duty ratio, node only in a short period of time keep state of activation carry out data forwarding and It receives.For this purpose, sending node needs to wait can carry out data transmission until receiving node becomes state of activation just for a long time, this Have led to sleep delay.In SWSNs, cumulative sleep delay will lead to the end-to-end transmission time of longer data.

It is suggested to shorten prolonged transmission delay, Pipeline Sheduling as caused by node sleep in SWSNs. Pipeline schedule is the node sequence distribution activation time slot in transmission path, and receiving node just receives data in sending node When just wake up at once, sending node can be forwarded at once without any sleep delay.However this dispatching technique ignores list Jump the unstability of Radio Link.When link is unstable causes data transmission fails, node is needed until next transmission cycle Data could be given to receiving node again, this will lead to longer transmission delay.In order to handle link instability problem, multithread The technologies such as waterline scheduling and chance pipeline schedule are proposed in succession.However both scheduling strategies are all number of the single-point to single-point According to transmission, when channel is very unstable, also easily lead to retransmit, meanwhile, existing pipeline agreement needs node maintenance Network state (for example, neighbor node wakeup time, routing state information etc.), this will expend the big energy of node.In addition, whenever When thering is one group of new source and terminal node to carry out data interaction, it is necessary to re-establish routing between node, reset scheduling Strategy.

In face of existing pipeline schedule there are the problem of, how to design a kind of guarantee transmission quality, low latency it is band-like Wireless sensor network transmission method is with regard to extremely important.

Summary of the invention:

Goal of the invention:

Technical problem to be solved by the invention is to provide a kind of low latency, guarantee transmission quality based on concurrent transmission and The radio transmitting method and network of sleep scheduling, main purpose are under the premise of guaranteeing that data are successfully decoded in terminal node, to the greatest extent Amount reduces the end-to-end propagation delay time of strip wireless sensor network.

Technical solution:

A kind of radio transmitting method, the radio transmitting method include:

Step 1: subregion is carried out to wireless-transmission network, and different subregions are respectively set to transmission subregion and spare point Area, wherein transmission subregion be responsible for data transmission, spare partitions be responsible for monitor transmission subregion whether Successful transmissions；

Step 2: sleep scheduling mechanism is used to divide different sleep scheduling strategies for each subregion；

Step 3: the node in data transfer phase, same subregion selects to close in subregion using probability forwarding mechanism Suitable node concurrent transmission；It is transmitted data subregion where start node, until terminal node is properly received.

A kind of wireless-transmission network, the wireless-transmission network are strip wireless sensor network, including start node, end Only node and multiple radio nodes,

The wireless-transmission network is divided into transmission subregion and spare partitions, the node of the transmission subregion and spare partitions Node can receive data；And the radio node of the transmission subregion is used for transmission data, and the node of spare partitions is used for Monitoring transmission subregion, whether Successful transmissions transmit to neighboring transmission subregion to listen to and when transmit subregion unsuccessful transmission Data；And the different sleep scheduling strategy of each zone configuration of wireless-transmission network, and in data transfer phase, together Node in one subregion is configured to select suitable node concurrently-transmitted data in subregion using probability forwarding mechanism.

Advantage and effect:

It is strong to enhance receiver reception signal for the data distribution mode of radio transmitting method of the invention based on concurrent transmission Degree, improves link-quality, reduces the probability of node re-transmission.Meanwhile using sleep scheduling strategy, distributed for different subregions Different time slot schedulings, reduce sleep delay.In addition, radio transmitting method of the invention is moved by node probability forwarding mechanism The number of nodes of concurrent transmission, avoids the unnecessary concurrent transmission node of selection, reduces transmission energy in the adjustment subregion of state Amount consumption；And when start node or terminal node change, does not need to re-establish and route and reset between node Scheduling strategy.Particularly suitable for needing low latency to carry out the strip wireless sensor network application of data distribution.It can be seen that this Invention is that space has been expanded in the technological progress of this field, and implementation result is good.

Detailed description of the invention:

Strip wireless sensor network of Fig. 1 embodiment of the present invention 1 containing unreliable link；

Strip wireless sensor network of Fig. 2 embodiment of the present invention 1 containing 9 subregions；

The time cycle schematic diagram of Fig. 3 embodiment of the present invention 1.

Specific embodiment:

Following further describes the present invention with reference to the drawings:

The purpose of the present invention, advantage and feature will be explained by the non-limitative illustration of preferred embodiment below.This A little embodiments are only the prominent example using technical solution of the present invention, all skills taking equivalent replacement or equivalent transformation and being formed Art scheme, all falls within the scope of protection of present invention.

The main thought of radio transmitting method based on concurrent transmission and sleep scheduling: entire belt-like zone is divided first As transmission subregion and spare partitions.It transmits subregion to transmit for data, the transmission of spare partitions monitored data.In same subregion Node has identical scheduling strategy, wakes up simultaneously, carries out concurrent transmission and data receiver.Meanwhile in partition data forwarding, use Probability forwarding mechanism dynamically to adjust concurrent node quantity in subregion.Node energy consumption can be effectively reduced in node sleep, concurrently Transmission can effectively improve signal quality, and The present invention gives the methods how effectively to combine the two.

A kind of radio transmitting method, the radio transmitting method include:

Step 1: subregion is carried out to wireless-transmission network, and different subregions are respectively set to transmission subregion and spare point Area, wherein transmission subregion be responsible for data transmission, spare partitions be responsible for monitor transmission subregion whether Successful transmissions；Step 2: it uses Sleep scheduling mechanism is that each subregion divides different sleep scheduling strategies；

When step 1 netinit, subregion is arranged according to partition threshold α for each node in operation partitioning algorithm first Number, and whole network is carried out by subregion according to partition number, the identical node division of partition number is in the same subregion, by partition number It is set as transmission subregion for the subregion of odd number, if the transmission subregion that partition number is i is b_i；The subregion that partition number is even number is set Spare partitions are set to, if the spare partitions that partition number is i are b ' _ i.

The partitioning algorithm comprises the concrete steps that: by zonal networks end to end two nodes be respectively defined as start node and Terminal node, oneself partition number is set as 1 by start node, while broadcasting a subregion packet, and partition number is set as 1 in subregion packet；Net All nodes for being successfully received subregion packet and also not set partition number in network, if the signal-to-noise ratio of received signal be greater than etc. In threshold alpha, then the partition number of oneself is set the partition number in subregion packet by node, while passing through csma side Formula broadcasts new subregion packet, and partition number is set as oneself partition number plus 1, if the signal-to-noise ratio of received signal in new subregion packet Less than threshold alpha, then the subregion packet received is abandoned, do not broadcast the message；Node determines partition size by partition threshold α, Partition threshold is bigger, and partition length is smaller；Partition threshold is smaller, and partition length is bigger.Partition length is excessive or too small can all make Propagation delay time becomes larger and gets higher with network power consumption, therefore presence is so that all lesser optimally partitioned threshold of propagation delay time and network power consumption Value α can be determined according to simulated experiment, and partition threshold α is traditionally arranged to be between -6~2.

If partition number i_x has been arranged in node, when receiving the subregion packet that partition number is i_y again, compare i_x and i_y Size the partition number of oneself is updated to i_y if i_x > i_y, and broadcast new point by csma mode Area is wrapped, and partition number is set as i_ (y+1) in new subregion packet, if i_x≤i_y, received subregion packet is abandoned, does not broadcast and disappears Breath；

Network partition time threshold t is set, starts timing after oneself partition number is arranged in node, if in time threshold t Partition number does not update, then the node ceases listening for subregion packet, and when terminal node ceases listening for subregion packet, terminal node will divide Area code adds 1, and as an independent subregion, partitioning algorithm terminates.

The sleep scheduling strategy of step 2 comprises the concrete steps that；Time cycle is divided into the equal time slots of K, i.e., time slot 1, Time slot 2 ..., time slot K；

For transmitting subregion b_i, if i≤K, the default wake-up time slot of subregion interior joint isIf K < i < 2 × K-3, then the default wake-up time slot of subregion interior joint beWith 1~(i mod K)；When i >=2 × K-3, entire week Phase, which all presets, is in wake-up states；

For spare partitions b ' _ i, if i≤K, the default wake-up time slot of subregion interior joint isIf K < i < 2 × K-2, then the default wake-up period of subregion interior joint beWith 1~(i mod K), when i >=2 × K-2, whole cycle is all pre- If being in wake-up states.

One time cycle is divided into K time slot, and the time cycle is calculated using following formula:

T=K × τ (1)；

Wherein, T represents the time cycle, and τ is slot unit duration, and K represents time slot；

Each subregion wakes up in fixed slot section, carries out data forwarding and reception.Slot unit duration τ is approximately equal to Primary complete data single-hop transmission time (including data transmission, ACK transmission and protection interval), that is a cycle is divided For K slot unit duration；Each subregion wakes up in fixed slot section, carries out data forwarding and reception；The value of K can root It is set according to practical application request, K is smaller, then transmission delay is smaller and node energy consumption is higher, and K is bigger, then transmission delay is got over It is big and node energy consumption is smaller.Terminal node is generally the receiving device for having continued power, presets it and is constantly in wake-up states.

Probability forwarding mechanism in step 3 uses formula:

Wherein, P_jIndicate the probability that node j is forwarded, ρ is nodes density, and α is partition threshold, snr_jIt is section The signal of point j receives overall strength, and f (α) is sigmoid function, i.e.,

Specific data transmission procedure is in step 3: when transmission subregion b_i fails to transfer data to next transmission When subregion b_ (i+2), spare partitions b ' _ (i+1) for listening to data is responsible for transferring data to next transmission subregion b_ (i+ 2)；

Due to the uncertainty of wireless signal transmission, it will appear three kinds of situations at this time:

Situation 1: spare partitions b ' _ (i+1) and transmission subregion b_ (i+2) have node to receive transmission subregion b_i transmission Data, at this point, spare partitions b ' _ (i+1) reply ACK message to transmission subregion b_i, transmission subregion b_ (i+2) reply ACK disappear It ceases to spare partitions b ' _ (i+1), transmits after the node in subregion b_i and spare partitions b ' _ (i+1) receives ACK message, into Enter sleep state；

Situation 2: transmission subregion b_ (i+2) receives data without node, and spare partitions b ' _ (i+1) has node to connect Receive the data of transmission subregion b_i transmission；At this point, receiving the node reverts back ACK message of data in spare partitions b ' _ (i+1) Transmission subregion b_i is given, transmits after the node in subregion b_i receives ACK and enters sleep state, and spare partitions b ' _ (i+1) is negative Duty transfers data to transmission subregion b_ (i+2) in next time slot；

Situation 3: the node in spare partitions b ' _ (i+1) does not receive the data of transmission subregion b_i, and transmission subregion Node in b_ (i+2) does not receive spare partitions b ' _ (i+1) data；Transmission failure.Both of these case can pass through setting Suitable partition threshold is avoided, and subsequent content is no longer discussed for both of these case.

It is operation partitioning algorithm, root that the wireless-transmission network, which is divided into transmission subregion and the specific method of spare partitions use, According to partition threshold α, partition number is set for each node, and whole network is carried out by subregion according to partition number, partition number is identical Node division is set as transmission subregion in the same subregion, by the subregion that partition number is odd number, if the transmission point that partition number is i Area is b_i；Spare partitions are set by the subregion that partition number is even number, if the spare partitions that partition number is i are b ' _ i；

By zonal networks, two nodes are respectively defined as start node and terminal node end to end, and start node is by oneself subregion It number is set as 1, while broadcasting a subregion packet, partition number is set as 1 in subregion packet；It is all in network to be successfully received subregion packet and go back The node of not set partition number, if the signal-to-noise ratio of received signal is more than or equal to threshold alpha, node is by the partition number of oneself The partition number being set as in subregion packet, while new subregion packet, new subregion Bao Zhongfen are broadcasted by csma mode Area code is set as oneself partition number plus 1, if the signal-to-noise ratio of received signal is less than threshold alpha, the subregion that will be received Packet abandons, and does not broadcast the message；

The sleep scheduling strategy is that the time cycle is divided into the equal time slots of K, i.e., time slot 1, time slot 2 ..., when Gap K；

Specific data transmission procedure is: when transmission subregion b_i fails to transfer data to next transmission subregion b_ (i+ 2) when, spare partitions b ' _ (i+1) for listening to data is responsible for transferring data to next transmission subregion b_ (i+2).

Embodiment 1

A kind of radio transmitting method based on concurrent transmission and sleep scheduling, the radio transmitting method include:

Step 1: when netinit, subregion is arranged according to partition threshold α for each node in operation partitioning algorithm first Number, and whole network is carried out by subregion according to partition number, the identical node division of partition number is in the same subregion, by partition number It is set as transmission subregion for the subregion of odd number, if the transmission subregion that partition number is i is b_i；The subregion that partition number is even number is set Spare partitions are set to, if the spare partitions that partition number is i are b ' _ i；Partition number i is positive integer；

Optimally partitioned threshold alpha is -5 in the present embodiment.

If Fig. 1 is the strip wireless sensor network model containing unreliable link, dot indicates sensor node.Dot A indicates start node, and since partitioning algorithm until nodes all in network all divide subregion, be divided into 9 start node altogether Subregion.

Step 2: sleep scheduling mechanism is used to divide different sleep scheduling strategies for each subregion: as shown in figure 3, will Time cycle is divided into 6 equal time slots, i.e. time slot 1, time slot 2, time slot 3, time slot 4, time slot 5 and time slot 6；

If Fig. 2 is the strip wireless sensor network model containing 9 subregions, dot indicates sensor node.Band-like net Digital representation partition number 1~9 below network.A cycle subregion is divided into 6 time slots in network, and each subregion is called out in fixed time slot It wakes up, carries out data forwarding and reception.The time slot 1 that transmission subregion 1 is preset in each period wakes up；Spare partitions 2 are preset in each The time slot 1,2 in period wakes up；The time slot 1,2,3 that transmission subregion 3 is preset in each period wakes up；Spare partitions 4 are preset in each The time slot 2,3,4 in period wakes up；The time slot 2,3,4,5 that transmission subregion 5 is preset in each period wakes up；Spare partitions default 6 exist The time slot 3,4,5,6 in each period wakes up；The time slot 1,3,4,5,6 that transmission subregion 7 is preset in each period wakes up；Spare partitions 8 time slots 1,2,4,5,6 for being preset in each period wake up；Transmission subregion 9 is preset in whole cycle and is in wake-up states.Node a Indicate that start node, node b indicate terminal node.Consider a data forwarding process, start node (being in subregion 1) is wanted will Data forwarding gives terminal node (being in subregion 9).

Step 3:

Step a: time slot k, transmit the node concurrently-transmitted data in subregion b_i, spare partitions b_ (i+1) and transmission subregion B_ (i+2) receives data；If thering is node to receive data in spare partitions b_ (i+1), and transmits and do not saved in subregion b_ (i+2) Point receives data, then the node that data are received in spare partitions b_ (i+1) concurrently replys ACK message；If spare partitions b_ (i+1) and in transmission subregion b_ (i+2) there is node to receive message, then transmit the section for receiving data in subregion b_ (i+2) Point concurrently replys ACK message and gives spare partitions b_ (i+1), and the node that data are then received in spare partitions b_ (i+1) is concurrent ACK message is replied to b_i.

Step b: time slot k+1, if thering is node to receive data in spare partitions b_ (i+1) in time slot k and transmitting subregion There is no node to receive data in b_ (i+2), then transmission subregion b_i enters sleep state at this time, connects in spare partitions b_ (i+1) The node concurrently-transmitted data of data is received, transmission subregion b_ (i+2), which receives data and replys ACK message, gives spare partitions b_ (i +1)；If thering is node to receive message in spare partitions b_ (i+1) and transmission subregion b_ (i+2) in time slot k, pass at this time Defeated subregion b_i and spare partitions b_ (i+1) enters sleep state, and transmission subregion b_ (i+2) carries out the operation of step a.

Node in all subregions carries out data forwarding according to step a and step b, due to the uncertainty of wireless transmission, It is divided to two kinds of extreme cases to be illustrated the data transmission method in Fig. 2 below:

Situation 1: the data that all transmission subregions have node to receive a transmission subregion forwarding.At this point, time slot 1 is called out Awake is subregion 1, and subregion 2, subregion 3, subregion 9, the transmission transmission data of subregion 1, transmitting in subregion 3 has node to receive data； The wake-up of time slot 2 is subregion 3, subregion 4, subregion 5, subregion 9, transmit received in subregion 3 transmission 1 data of subregion node it is concurrent Data are transmitted, transmitting in subregion 5 has node to receive data；The wake-up of time slot 3 is subregion 5, subregion 6, subregion 7, subregion 9, biography The node concurrently-transmitted data of transmission 3 data of subregion is received in defeated subregion 5, transmitting in subregion 7 has node to receive data；When The wake-up of gap 4 is subregion 7, subregion 8, and subregion 9 transmits the node concurrently-transmitted data that data are received in subregion 7, transmits subregion Terminal node in 9 receives data；It is wake-up states that time slot 5 and time slot 6, which only have subregion 9,；Terminal node needs 4 time slots to connect Receive data；

As shown in Fig. 2, situation 2: all transmission subregions all receive the data of upper transmission subregion forwarding without node, I.e. each transmission subregion requires to receive the data of the spare partitions forwarding of the front.At this point, the wake-up of time slot 1 is subregion 1, point Area 2, subregion 3, subregion 7, subregion 8, subregion 9, transmission subregion 1 send data, have node to receive data in spare partitions 2, and There is no node to receive data in transmission subregion 3, transmission subregion 7 receives the node concurrently-transmitted data of data, in spare partitions 8 There is node to receive data, and transmitting in subregion 9 does not have node to receive data；The wake-up of time slot 2 is subregion 2, and subregion 3 divides Area 4, subregion 5, subregion 8, subregion 9, spare partitions 2 receive the node concurrently-transmitted data of data, and transmitting in subregion 3 has node to connect Data are received, spare partitions 8 receive the node concurrently-transmitted data of data, and transmitting in subregion 9 has node to receive data；Time slot 3 to wake up be subregion 3, subregion 4, subregion 5, subregion 6, subregion 7, subregion 9, and transmission subregion 3 receives the node concurrent transmission of data Data have node to receive data in spare partitions 4, and transmitting in subregion 5 does not have node to receive data；What time slot 4 woke up For subregion 4, subregion 5, subregion 6, subregion 7, subregion 8, subregion 9, spare partitions 4 receive the node concurrently-transmitted data of data, pass There is node to receive data in defeated subregion 5；The wake-up of time slot 5 is subregion 5, subregion 6, subregion 7, subregion 8, subregion 9, transmission subregion 5 receive the node concurrently-transmitted data of data, have node to receive data in spare partitions 6, and transmitting in subregion 7 does not have node Receive data；The wake-up of time slot 6 is subregion 6, subregion 7, subregion 8, subregion 9, and the node that spare partitions 6 receive data concurrently passes Transmission of data, transmitting in subregion 7 has node to receive data；Terminal node needs 8 time slots to receive data.

The characteristics of transmission method of the invention is the spy by entire strip wireless sensor network region according to concurrent transmission Property be divided into multiple approximately equal subregions, and use sleep scheduling mechanism for each subregion order-assigned activate time slot.It is same Node in subregion has identical scheduling strategy, wakes up simultaneously, concurrent transmission, and multiple identical signals form construction interference, with this Enhance received signal strength, improves link-quality.After the present invention, data can be realized in strip wireless sensor network The low energy consumption and low latency of transmission, especially suitable for needing the strip wireless sensor network application of low latency and low energy consumption.

Claims

1. A wireless transmission method, characterized in that: the wireless transmission method comprises:

Step 1: Partition the wireless transmission network, and set different partitions as transmission partitions and standby partitions, wherein the transmission partition is responsible for data transmission, and the standby partition is responsible for monitoring whether the transmission partition is successfully transmitted;

Step 2: Use the sleep scheduling mechanism to divide different sleep scheduling policies for each partition;

Step 3: In the data transmission stage, the nodes in the same partition use the probability forwarding mechanism to select appropriate nodes in the partition for concurrent transmission; data transmission starts from the partition where the initial node is located until the termination node successfully receives it.

2. wireless transmission method according to claim 1 is characterized in that: when step 1 network is initialized, first run partition algorithm, according to partition threshold α, set partition number for each node, and according to partition number, the whole network is partitioned , the nodes with the same partition number are divided into the same partition, set the partition with an odd partition number as the transmission partition, and set the transmission partition with the partition number i as b_i; set the partition with an even number as the spare partition, set the partition The spare partition number i is b'_i.

3. The wireless transmission method according to claim 2, characterized in that: the concrete steps of the partition algorithm are: the head and tail nodes of the strip network are respectively defined as an initial node and a termination node, and the initial node partitions itself The number is set to 1, and a partition packet is broadcast at the same time, and the partition number in the partition packet is set to 1; all nodes in the network that successfully receive the partition packet and have not set the partition number, if the signal-to-noise ratio of the received signal is greater than or equal to the threshold value α, then the node sets its own partition number as the partition number in the partition package, and broadcasts the new partition package through the carrier sense multiple access method. The partition number in the new partition package is set to its own partition number plus 1. If it receives The signal-to-noise ratio of the signal is less than the threshold α, the received partition packet is discarded, and the message is not broadcast;

If the node has set the partition number i_x, when it receives the partition packet with the partition number i_y again, compare the size of i_x and i_y, if i_x>i_y, update its own partition number to i_y, and use carrier sense multiple access The method broadcasts the new partition package. The partition number in the new partition package is set to i_(y+1). If i_x≤i_y, the received partition package will be discarded and the message will not be broadcast;

Set the network partition time threshold t, and start timing after the node sets its own partition number. If the partition number is not updated within the time threshold t, the node stops listening for partition packets. When the terminating node stops listening for partition packets, the terminating node changes the partition number. Add 1, as an independent partition, the partition algorithm ends.

4. The wireless transmission method according to claim 1, characterized in that: the specific step of the sleep scheduling strategy in step 2 is: dividing the time period into K equal time slots, namely time slot 1, time slot 2, ..., time gap K;

For the transmission partition b_i, if i≤K, the preset wake-up time slot of the node in the partition is If K<i<2×K-3, the preset wake-up time slot of the nodes in the partition is and 1～(i mod K); when i≥2×K-3, the whole cycle is preset to be in the wake-up state;

For the spare partition b'_i, if i≤K, the preset wake-up time slot of the nodes in the partition is If K<i<2×K-2, the preset wake-up period of the nodes in the partition is and 1～(i mod K), when i≥2×K-2, the whole cycle is preset to be in the wake-up state.

5. The wireless transmission method according to claim 1, wherein the probability forwarding mechanism in step 3 adopts the formula:

Among them, P _j represents the probability of node j forwarding, ρ is the node density in the network, α is the partition threshold, snr _j is the total signal reception strength of node j, f(α) is the sigmoid function, that is

6. The wireless transmission method for concurrent transmission and sleep scheduling according to claim 1, wherein the data transmission process in step 3 is: when transmission partition b_i fails to transmit data to next transmission partition b_(i+ 2), the backup partition b'_(i+1) that has monitored the data is responsible for transmitting the data to the next transmission partition b_(i+2).

7. The wireless transmission method for concurrent transmission and sleep scheduling according to claim 6, wherein the specific data transmission process is: due to the uncertainty of wireless signal transmission, there are three situations at this time:

Case 1: Both the backup partition b'_(i+1) and the transmission partition b_(i+2) have nodes that receive the data sent by the transmission partition b_i. At this time, the backup partition b'_(i+1) replies with an ACK message To the transmission partition b_i, the transmission partition b_(i+2) replies the ACK message to the backup partition b'_(i+1), after the nodes in the transmission partition b_i and the backup partition b'_(i+1) receive the ACK message , enter the sleep state;

Case 2: No node in the transmission partition b_(i+2) has received data, but some nodes in the standby partition b'_(i+1) have received the data transmitted by the transmission partition b_i; at this time, the standby partition b'_(i The node receiving the data in +1) replies an ACK message to the transmission partition b_i, the node in the transmission partition b_i enters the sleep state after receiving the ACK, and the spare partition b'_(i+1) is responsible for transmitting the data to the next time slot. transfer partition b_(i+2);

Case 3: The nodes in the spare partition b'_(i+1) did not receive the data of the transmit partition b_i, and the nodes in the transmit partition b_(i+2) did not receive the spare partition b'_(i+1) data; transfer failed.

8. A wireless transmission network, the wireless transmission network is a banded wireless sensor network, comprising an initial node, a termination node and a plurality of wireless nodes, characterized in that:

The wireless transmission network is divided into a transmission zone and a backup zone, and both the nodes in the transmission zone and the nodes in the backup zone can receive data; and the wireless nodes in the transmission zone are used for data transmission, and the nodes in the backup zone are used for monitoring Whether the transmission partition is successfully transmitted, and when the transmission of the transmission partition is unsuccessful, the monitored data is transmitted to the adjacent transmission partition; and, each partition of the wireless transmission network is configured with different sleep scheduling policies, and in the data transmission phase, the same partition The nodes in are configured to use a probabilistic forwarding mechanism to select appropriate nodes in the partition to transmit data concurrently.

9. wireless transmission network according to claim 8, is characterized in that: the concrete method that described wireless transmission network is divided into transmission subarea and backup subarea adopts is to run subarea algorithm, according to subarea threshold value α, set subarea number for each node , and partition the entire network according to the partition number, the nodes with the same partition number are divided into the same partition, the partition with an odd partition number is set as the transmission partition, and the transmission partition with the partition number i is set as b_i; The even-numbered partitions are set as spare partitions, and the spare partition with partition number i is set as b'_i;

The head and tail nodes of the strip network are defined as the initial node and the termination node respectively. The initial node sets its own partition number to 1, and broadcasts a partition packet at the same time. The partition number in the partition packet is set to 1; all the partitions in the network are successfully received. If the signal-to-noise ratio of the received signal is greater than or equal to the threshold α, the node will set its own partition number as the partition number in the partition package, and broadcast through the carrier sense multiple access mode. In the new partition package, the partition number in the new partition package is set to its own partition number plus 1. If the signal-to-noise ratio of the received signal is less than the threshold α, the received partition package will be discarded and the message will not be broadcast;

10. The wireless transmission network according to claim 8, wherein the sleep scheduling strategy is to divide the time period into K equal time slots, namely time slot 1, time slot 2, ..., time slot K;

11. wireless transmission network according to claim 8, is characterized in that: concrete data transmission process is: when transmission subregion b_i fails to transmit data to next transmission subregion b_(i+2), listen to data The spare partition b'_(i+1) is responsible for transferring data to the next transfer partition b_(i+2).