CN113115432B

CN113115432B - Wireless communication method, device, equipment and storage medium

Info

Publication number: CN113115432B
Application number: CN202110405890.4A
Authority: CN
Inventors: 尹灿
Original assignee: Shanghai Jinzhuo Technology Co ltd
Current assignee: Shanghai Jinzhuo Technology Co ltd
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2023-12-08
Anticipated expiration: 2041-04-15
Also published as: CN113115432A

Abstract

The invention provides a method, a device, equipment and a storage medium for wireless communication, wherein the method comprises the following steps: when a node transmits data, a conflict detection unit of the current wireless frame is randomly selected from a conflict detection block of the current wireless frame to transmit a preamble signal; and when the conflict detection unit does not receive the preamble signal of the adjacent node before, data is sent to the service bearing block of the wireless frame; the conflict detection block comprises a plurality of continuous long-time slices, each time slice corresponds to one conflict detection unit, and the service bearing block is a plurality of continuous time slices and is arranged behind the conflict detection block. The method, the device, the equipment and the storage medium of the invention improve the anti-interference capability of the centerless network.

Description

Wireless communication method, device, equipment and storage medium

Technical Field

The present invention relates to the field of wireless communications, and in particular, to the field of anti-interference methods, apparatuses, devices, and storage media for decentralised wireless communications.

Background

In a complex electromagnetic environment, how to improve the anti-interference capability of a wireless communication system has been an important research topic in the communication field.

There are also a number of drawbacks to networks with control centers. Firstly, the construction cost is high, and the mobility is poor; secondly, the centralized management causes heavy tasks and high power consumption of the central node; third, the dependence is strong, once the center has a problem, the whole network is paralyzed. For the decentered network, how to perform spontaneous resource scheduling and how to avoid mutual interference of signals in the network is always a core problem of research.

Disclosure of Invention

In view of this, the embodiments of the present invention provide a method, apparatus, device and storage medium for wireless communication, which implement synchronization and interference resistance of a wireless communication network without a center based on a specially configured wireless frame structure.

In a first aspect, an embodiment of the present invention provides a wireless communication method, which includes when a node a transmits data, randomly selecting a collision detection unit in a collision detection block of a current wireless frame to transmit a preamble signal; and when the conflict detection block starts to a time period corresponding to the front of the conflict detection unit and does not receive a preamble signal of a neighboring node, data is sent to a service bearing block of the wireless frame; the conflict detection block comprises a plurality of continuous long-time slices, each time slice corresponds to one conflict detection unit, and the service bearing block is a plurality of continuous time slices and is arranged behind the conflict detection block.

By the method, the conflict detection unit based on the wireless frame detects the conflict with the data transmitted between the nodes, and the anti-interference capability of the network is improved.

In a possible implementation manner of the wireless communication method of the first aspect, when the node a sends data, the method further includes: and when the conflict detection block starts to receive a preamble signal of a neighboring node in a time period corresponding to the conflict detection unit, receiving data of the neighboring node in a service bearing block.

By the above, the collision detection unit based on the wireless frame detects whether the neighboring node transmits data or not, and timely receives the data of the neighboring node.

In a possible implementation manner of the wireless communication method of the first aspect, when the node a enters the network, searching for a synchronization signal of a neighboring node in the first search window, and implementing frame synchronization based on the searched synchronization signal of the neighboring node.

By the above, the adjacent node sends the synchronizing signal according to the frame structure of the wireless frame, and the network access node realizes the frame synchronization with the whole network by the searched synchronizing signal of the adjacent node and the frame synchronization with the adjacent node, realizes the network decentralization and eliminates the potential influence of the decentralization equipment on the network.

In a possible implementation manner of the wireless communication method of the first aspect, the implementing frame synchronization based on the searched synchronization signal of the neighboring node includes: determining a frame boundary of the radio frame of the node B based on the searched synchronization signal of the adjacent node B; the frame boundary of the radio frame of the node B is determined as the frame boundary of the radio frame of the node A itself.

From the above, the network access node searches the synchronization signal of the adjacent node, determines the frame boundary of the wireless frame, and realizes the frame synchronization with the whole network by using the same frame boundary as the network access node, thereby realizing the network decentralization.

In a possible implementation manner of the wireless communication method of the first aspect, when the node a searches for the synchronization signal of the neighboring node in the first search window, the method further includes: when the node A does not search for the adjacent node signal in the first search window, sending network access data of the node A in the next wireless frame; and subsequently searching for a synchronization signal of a neighboring node within a first search window from a randomly selected time point.

By the method, the network access node sends network access data containing the synchronization signal of the network access node in the synchronization signal of the neighbor node which is not searched, so that other network access nodes are synchronized with the network access node, and the decentralization is realized.

In a possible implementation manner of the wireless communication method of the first aspect, the node a broadcasts the network data periodically.

By the method, each node periodically broadcasts the network data to synchronize other network access nodes with the network data, so as to realize decentralization.

In a possible implementation manner of the wireless communication method of the first aspect, when the node a is in the listening mode, detecting a co-frequency signal of a frequency band used by the wireless network in a time slot other than a wireless frame for transmitting data; searching the synchronous signals of each adjacent node from the same-frequency signals, and determining the adjacent node sending the synchronous signals and the frame boundary of the current wireless frame of the adjacent node according to the searched synchronous signals; and receiving the data of the adjacent node at a service bearing block. .

By the above, the change of the network neighbor node and the change of the frame boundary thereof are detected in the monitoring mode, so that the accurate communication with the neighbor node during the directional transmission is realized.

In a possible implementation manner of the wireless communication method of the first aspect, when the node a is in the listening mode, performing the network listening in a time slot outside a radio frame in which data is transmitted; detecting adjacent frequency signals of a frequency band used by the wireless network; determining the interference condition of each time-frequency resource position of the wireless network based on the same-frequency signal and the adjacent frequency signal; and selecting a time-frequency resource with small interference for transmitting data based on the interference condition of each time-frequency resource position.

By monitoring the change of the interference of each time-frequency resource of the network, the time-frequency resource with smaller interference is selected for transmitting data, and the anti-interference capability of the network is improved.

In a possible implementation manner of the wireless communication method of the first aspect, when the node a is in the listening mode, the method further includes: when data is transmitted, a modulation mode when the data is transmitted is determined based on the interference condition of the selected time-frequency resource, and the modulation order changes inversely with the interference.

Based on the interference condition of each time-frequency resource of the monitoring network, a proper modulation mode is selected, and the anti-interference capability of the network is improved.

In a possible implementation manner of the wireless communication method of the first aspect, when the node a is in the low power consumption mode, the node a periodically performs the network monitoring; the time slots outside the network listening of the transmission data and period are in a closed state.

By the above, the nodes in the monitoring mode close other time slots by keeping necessary monitoring and data transmission, and the standby time is prolonged.

In a possible implementation manner of the wireless communication method of the first aspect, when the node a sends data, the method further includes: and when the node A transmits data to the node A for transmitting the directional service data, determining the frame boundary of the wireless frame of the node as the frame boundary of the wireless frame of the node A.

By synchronizing with the frame of the receiving node in the directional transmission, the anti-interference capability of the transmitted data is improved.

In a possible implementation manner of the wireless communication method of the first aspect, the service carrying block of the radio frame includes a first set time slice, and the node a sends the synchronization signal in the first set time slice.

The first set time slice for sending the synchronous signal is positioned in the service bearing block, so that the receiving and transmitting conversion times of the radio frequency device are reduced, and the node radio frequency device can work stably.

In a possible implementation manner of the wireless communication method of the first aspect, the service bearer of the radio frame sets a second set time slice, and the node a sends an AGC signal with constant power in the second set time slice.

By the above, the receiver can accurately receive data through the AGC signal with constant power.

In a possible implementation manner of the wireless communication method of the first aspect, the node a sets the first protection time slice between the collision detection block and the service bearer block of the wireless frame, and completes the transmit-receive switching in the first protection time slice.

By setting the first protection time slice of the receiving-transmitting conversion of the radio frequency device, the node radio frequency device can work stably.

In a possible implementation manner of the wireless communication method of the first aspect, a second protection time slice is set before the collision detection block of the wireless frame, and the length of the second protection time slice varies positively with the communication distance of the wireless network; and/or setting a third protection time slice before the end of the current wireless frame, wherein the length of the third protection time slice is positively changed along with the communication distance of the wireless network.

By setting the second protection time slice and/or the third protection time slice, the interference between adjacent wireless frames of different nodes is eliminated.

In a second aspect, an embodiment of the present invention provides a wireless communication apparatus, including:

the data transmission module is used for randomly selecting a conflict detection unit in a conflict detection block of a current wireless frame to transmit a leading signal when the node A transmits data, detecting the leading signal of an adjacent node in the conflict detection block, and transmitting the data in a service bearing block of the wireless frame when the leading signal of the adjacent node is not received in a period of time corresponding to the period from the start of the conflict detection block to the start of the conflict detection unit; the conflict detection block comprises a plurality of continuous long-time slices, each time slice corresponds to one conflict detection unit, and the service bearing block is a plurality of continuous time slices and is arranged behind the conflict detection block.

In a possible implementation manner of the wireless communication apparatus of the second aspect, the data sending module is further configured to receive, at a service bearer, data of a neighboring node when a preamble of the neighboring node is received in a period from a start of the collision detection block to a corresponding time period of the collision detection unit.

In a possible implementation manner of the wireless communication apparatus of the second aspect, the wireless communication apparatus further includes a synchronization module, configured to search for a synchronization signal of a neighboring node in the first search window when the node a enters the network, and implement frame synchronization based on the searched synchronization signal of the neighboring node.

In a possible implementation manner of the wireless communication apparatus according to the second aspect, the synchronization module is specifically configured to determine a frame boundary of the radio frame of the node B based on the searched synchronization signal of a neighboring node B; and determining the frame boundary of the radio frame of the node B as the frame boundary of the radio frame of the node A.

In a possible implementation manner of the wireless communication apparatus of the second aspect, the synchronization module is further specifically configured to send, when the node a does not search for the neighboring node signal within the first search window, its network access data in its next radio frame; and subsequently searching for a synchronization signal of a neighboring node within a first search window from a randomly selected time point.

In a possible implementation manner of the wireless communication apparatus of the second aspect, the wireless communication apparatus further includes a periodic broadcast module for periodically broadcasting the network data of the node a.

By the method, each node periodically broadcasts network data to synchronize other network access nodes with the network data, so as to realize decentralization.

In a possible implementation manner of the wireless communication apparatus of the second aspect, the wireless communication apparatus further includes a network monitoring module, configured to detect, when the node a is in the monitoring mode, a co-frequency signal of a wireless network usage frequency band of the wireless communication apparatus in a time slot other than a wireless frame in which data is transmitted; searching the synchronous signals of all adjacent nodes from the same-frequency signals, and determining the adjacent nodes transmitting the synchronous signals and the frame boundaries of the current wireless frames of the adjacent nodes according to the searched synchronous signals; and receiving the data of the adjacent node at a service bearing block.

In a possible implementation manner of the wireless communication apparatus of the second aspect, the network monitoring module is further configured to perform, when the node a is in the monitoring mode, the network monitoring at a time slot other than a radio frame in which data is transmitted; detecting adjacent frequency signals of the wireless network using frequency bands; determining the interference condition of each time-frequency resource position of the wireless network based on the same-frequency signal and the adjacent frequency signal; and selecting a time-frequency resource with small interference for transmitting data based on the interference condition of each time-frequency resource position.

In a possible implementation manner of the wireless communication apparatus according to the second aspect, the data transmission module is further configured to determine, when the node a is in the listening mode, a modulation mode when transmitting data based on the interference condition of the selected time-frequency resource, and an order of modulation varies inversely with the interference.

In a possible implementation manner of the wireless communication apparatus of the second aspect, the network monitoring module is further configured to, when the node a is in the low power consumption mode, perform the network monitoring periodically; and the time slot outside the network monitoring of the sending data and period is in a closed state.

In a possible implementation manner of the wireless communication apparatus of the second aspect, the data sending module is further configured to determine, when the node a sends the directional traffic data to a node, a frame boundary of the radio frame of the node as a frame boundary of the radio frame of the node a itself.

In a possible implementation manner of the wireless communication apparatus of the second aspect, the data sending module is further configured to set a first set time slice in a traffic bearer of the radio frame, and send the synchronization signal in the first set time slice.

In a possible implementation manner of the wireless communication apparatus, the data sending module is further configured to send the AGC signal with constant power at a second set time slice of the traffic bearing block of the radio frame, where the second set time slice is set in the traffic bearing block of the radio frame.

In a possible implementation manner of the wireless communication apparatus of the second aspect, the data sending module is further configured to set a first protection time slice between the collision detection block and the service bearer block of the radio frame, and complete the transmit-receive switching in the first protection time slice.

By the above, the node radio frequency device can stably work by setting the first protection time slice of the receiving-transmitting conversion of the radio frequency device.

In a possible implementation manner of the wireless communication apparatus of the second aspect, the data sending module is further configured to set, by the node a, a second protection time slice between the collision detection block and the traffic bearer block of the radio frame, where a length of the second protection time slice varies positively with a communication distance of the wireless network; the node A is also used for setting a third protection time slice before the wireless frame is ended, and the length of the second protection time slice is positively changed along with the communication distance of the wireless network; .

In a third aspect, embodiments of the present invention provide a computing device comprising,

a bus;

a communication interface connected to the bus;

at least one processor coupled to the bus; and

at least one memory coupled to the bus and storing program instructions that, when executed by the at least one processor, cause the at least one processor to perform any of the embodiments of the first aspect of the invention.

In a fourth aspect, there is provided a computer readable storage medium having stored thereon program instructions, characterized in that the program instructions, when executed by a computer, cause the computer to perform any of the embodiments of the first aspect.

Drawings

Fig. 1 is a schematic diagram of a radio frame according to various embodiments of the present invention;

fig. 2 is a flow chart of a first embodiment of a wireless communication method according to the present invention;

fig. 3A is a schematic flow chart of a second embodiment of a wireless communication method according to the present invention;

fig. 3B is a schematic flow chart of a synchronization method according to a second embodiment of the present invention;

Fig. 3C is a flow chart of a network monitoring method according to a second embodiment of the present invention;

fig. 3D is a flow chart of a service data sending method according to a second embodiment of the present invention;

fig. 4 is a schematic flow chart of a third embodiment of a wireless communication method according to the present invention;

fig. 5 is a schematic structural diagram of a first embodiment of a wireless communication device according to the present invention;

fig. 6A is a schematic structural diagram of a second embodiment of a wireless communication device according to the present invention;

fig. 6B is a schematic structural diagram of a synchronization module of a second embodiment of a wireless communication device according to the present invention;

fig. 6C is a schematic structural diagram of a network monitoring module according to a second embodiment of the present invention;

fig. 6D is a schematic structural diagram of a service data sending module according to a second embodiment of a wireless communication method of the present invention;

fig. 7 is a schematic structural diagram of a third embodiment of a wireless communication device according to the present invention;

FIG. 8 is a schematic diagram of a computing device according to various embodiments of the invention.

Detailed Description

In the following description, reference is made to "some embodiments" which describe a subset of all possible embodiments, but it is to be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with one another without conflict.

In the following description, references to the terms "first/second/third, etc." or module a, module B, module C, etc. are used merely to distinguish between similar objects or between different embodiments, and do not represent a particular ordering of the objects, it being understood that particular orders or precedence may be interchanged as permitted so that embodiments of the invention described herein can be implemented in an order other than that illustrated or described herein.

In the following description, reference numerals indicating steps such as S110, S120, … …, etc. do not necessarily indicate that the steps are performed in this order, and the order of the steps may be interchanged or performed simultaneously as allowed.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing embodiments of the invention only and is not intended to be limiting of the invention.

Embodiments of a method for implementing intra-communication of heterogeneous systems according to the present invention are described below with reference to fig. 1 to 3.

Fig. 1 is a schematic diagram illustrating a structure of a radio frame according to various embodiments of the present invention.

The radio frame includes a collision detection block and a traffic bearer block.

The conflict detection block comprises a plurality of continuous long-time slices, each time slice corresponds to one conflict detection unit, each node randomly selects one conflict detection unit to send a preamble signal for indicating that the node is ready to send data on the service bearing block, so that the interference problem caused by the problem that each node preemptively occupies the service bearing block is solved, and the network anti-interference capability is improved.

The longer the conflict detection block is, the stronger the network anti-interference capability is, and the length of the conflict detection block is set based on the network anti-interference capability and the waveform of radio frequency.

The service carrying block is a plurality of continuous time slices and is arranged behind the conflict detection block and is used for sending a synchronous signal SS (Synchronous signal), an automatic gain control signal AGC (Automatic Gain Control) and related data.

The synchronization signal is the identification of each node, so that the node is conveniently identified by other nodes and is synchronized with the frame of the node, and the synchronization among the nodes is realized under the condition of no central equipment.

The AGC signal is sent at constant power, so that the receiving node can conveniently adjust the amplification factor of a receiving circuit of the receiving node so as to improve the accuracy of received data.

And setting a protection time GP1 between the conflict detection block and the service bearing block, wherein the protection time GP1 is used for realizing the conversion between the receiving and transmitting of the radio frequency equipment of the node, and determining the length of the protection time GP1 based on the frequency receiving and transmitting conversion performance of the radio frequency equipment of the node at the radio frequency. The better the switching performance, i.e. the faster the switching speed, the shorter the protection time GP1 length.

And a protection time GP0 is arranged before the conflict detection block and after the service bearing block and is used for preventing interference caused by space transmission delay of adjacent wireless frames of different nodes, wherein the protection time GP0 is related to the coverage range of the nodes, and the larger the coverage distance is, the longer the protection time GP0 is.

[ one Wireless communication method embodiment one ]

Fig. 2 shows a flow of a first embodiment of a wireless communication method.

The data is one of the following: network access data, directional service data, broadcast service data. The method is suitable for sending network access data, directional service data and broadcast service data.

The following describes a flow of a data transmission method according to a first embodiment of a wireless communication method with reference to fig. 2 by taking a node a in a network as an example, which includes the following steps:

step 210, when node a transmits data, the collision detection unit is randomly selected from the collision detection blocks of the current radio frame to transmit the preamble signal.

Wherein, based on the mode of random selection, the collision detection unit of each node is selected to send the preamble signal, and the preamble signal collision probability of each node is reduced.

Step 220, determining whether node a receives the preamble of other neighboring nodes within a period from the start of the collision detection block to the time period corresponding to the collision detection unit?

In the collision detection block, each node is in a receiving state except for transmitting a preamble signal by the collision detection unit of the node, and receives the preamble signal transmitted by each adjacent node. If the node a does not receive any preamble signal of the neighboring node before the collision detection unit, the time of transmitting data with the neighboring node does not collide, and the step 230 is shifted to perform data transmission, otherwise, the time of transmitting data with a neighboring node collides, and the step 240 is shifted to perform data reception.

Step 230, the node a adjusts the radio frequency device to a transmitting state in the protection time GP1, and sends a synchronization signal, an AGC signal and the data in the service bearer.

Wherein the synchronization signal, the AGC signal and the data are sent in a traffic bearing block. The synchronous signal is used for judging the sending node and the frame boundary of the sending node of the data by the receiving node, the AGC is a constant power signal and is used for adjusting the gain of a radio frequency receiver of the receiving node by the receiving node so as to realize stable receiving of the data.

If the interference condition of each time-frequency resource position is known by the node A, the interference of the available time-frequency resources is sequenced, the time-frequency resources used for transmitting data are selected from the time-frequency resources with small interference based on the sequencing, and a modulation mode is selected based on the interference condition of each time-frequency resource. If the interference condition of each time-frequency resource position is unknown, the time-frequency resource is randomly selected, and the coding mode with the strongest error correction capability is selected to transmit data under the condition of the transmission bandwidth permission.

Step 240, the node a adjusts the radio frequency device to a receiving state in the protection time GP1, and receives the data of the neighboring node in the service carrier block.

And receiving the synchronous signal, the AGC signal and the data sent by the adjacent node at the service bearing block node A. And searching a coding mode used by the sending node based on the synchronous signal. For example, if the transmitting node uses frequency hopping or time hopping or spreading, its frequency hopping sequence and frequency hopping pattern or time hopping sequence and time hopping pattern or spreading code and spreading pattern can be known. And decoding the data received by the service bearing block according to the frame structure and the coding mode shown in fig. 1, so as to receive the sending data of the adjacent node, including network access data, broadcast service data and directional service data. When receiving data, the node A adjusts the gain of the radio frequency receiver according to the AGC signal, so as to accurately receive the data.

In summary, in the first embodiment of the wireless communication method, the collision detection unit based on the wireless frame detects the collision with the data sent between the nodes, thereby improving the anti-interference capability of the network.

[ one Wireless communication method embodiment two ]

The node of the invention has two working modes, one is a monitoring mode and the other is a low-power consumption mode, wherein the monitoring mode is described by taking a second embodiment of a wireless communication method as an example, and the low-power consumption mode is described by taking a third embodiment of the wireless communication method as an example.

The second embodiment of the wireless communication method inherits all the methods of the first embodiment of the wireless communication method, has all the advantages thereof, and the added parts thereof are mainly described below.

Continuing to take node a as an example, a flow of a second embodiment of a wireless communication method is described in conjunction with fig. 3A, which includes the following steps:

step 310, searching the synchronization signals of each adjacent node after the node A is started, and realizing frame synchronization based on the searched synchronization signals of the adjacent nodes.

The node A is a network access node which is just started, and if the node A searches for a synchronous signal of an adjacent node B, the frame boundary of the wireless frame based on the synchronous signal is formed; and determining the frame boundary of the wireless frame of the node B as the frame boundary of the wireless frame of the node A, so as to realize the frame synchronization of the node A and the node B. Because node B is already synchronized with other on-network nodes, node a is also synchronized with other on-network nodes. For a detailed description of this step, please refer to a synchronization method of the second embodiment of the wireless communication method.

According to the synchronization signals set by the frame structure of the wireless frame, the network access node realizes network decentralization through the searched synchronization signals of the adjacent nodes and frame synchronization with the adjacent nodes, and potential influence of the decentralization equipment on the network is eliminated.

Step 320, node a listens to the network signal, determines the interference condition of each time-frequency resource, and selects the time-frequency resource for data transmission, and receives the data transmitted by other nodes.

In the monitoring mode described in this embodiment, each node monitors a network signal, including a signal of each time-frequency resource of the local network and a signal outside the local network, and determines in-band interference and out-of-band interference of each time-frequency resource of the local network according to the signal, so as to select a time-frequency resource with smaller interference for subsequent transmission data, and receive transmission data of other neighboring nodes, including network access data, network access data and service data, based on the received preamble signal. For a detailed description of this step, please refer to a network monitoring method of the second embodiment of the wireless communication method.

By monitoring the network signals by each node, the time-frequency resource with smaller interference is selected for the subsequent transmitted data, and the anti-interference capability of the network is improved.

Step 330, node a periodically broadcasts its on-network data, wherein each broadcast determines a radio frame to transmit the on-network data based on collision detection.

The node A periodically broadcasts network data, so that the network data can be found by other nodes in time, and when the network data is broadcast, the node A detects whether a preamble signal is transmitted by other adjacent nodes before a self conflict detection unit of a conflict detection block of a current wireless frame. If not, the data is not conflicted with other adjacent nodes, and the network data is transmitted in the current wireless frame; if so, the network data is transmitted in a next wireless frame again in an attempt to transmit the network data with other adjacent nodes.

This step operates on a demand basis, and is not an essential step after step 320, and returns to step 320 after operation to continue monitoring network signals.

In the method for transmitting broadcast data in this step, please refer to a first embodiment of a wireless communication method.

By the method, the node A broadcasts the network data periodically, so that the node A can be found by other nodes in time, the node which is newly accessed to the network can be synchronized with the node, or the node which is used for directionally transmitting the data to the node A can be synchronized with the node, and the decentralization of the network is realized.

Step 340, node a transmits traffic data based on the traffic demand, wherein the radio frame transmitting the traffic data is determined based on collision detection.

The service data comprises directional service data sent to the directional nodes and broadcast service data sent to all nodes. And detecting whether a preamble signal transmitted by a neighboring node exists before a self collision detection unit of a collision detection block of the current wireless frame when service data is transmitted each time. If not, the data is not conflicted with any adjacent node, and the service data is sent in the current wireless frame; if so, the data conflict is sent with a neighboring node, and the service data is tried to be sent in the next wireless frame.

For a detailed description of this step, please refer to a service data transmission method of the second embodiment of the wireless communication method.

Based on the conflict detection result of the conflict detection block of the wireless frame, the wireless frame of the network data is determined, and the anti-interference capability of the network is enhanced.

[ synchronization method of Wireless communication method embodiment two ]

Fig. 3B shows a flow of a synchronization method of a second embodiment of a wireless communication method, which includes the following steps:

step 3110, searching for synchronization signals of neighboring nodes in the first search window after the node a is powered on.

The node A is started to prepare for network access, and needs to be synchronized with the network neighbor nodes. As can be seen from fig. 1, the synchronization signal of each node is sent in a time slice corresponding to the synchronization signal in the traffic bearer of the radio frame. The first search window is related to the node scale of the network, the network scale is large, and the first search window is long.

Specifically, node a has previously known the synchronization signal code stream of each node, and the synchronization signal is transmitted using a fixed known coding scheme. And decoding the searched signal based on the fixed known codes, and then gradually shifting and correlating the code stream of the synchronous signal of each node with the decoded received signal to obtain the synchronous signal with the largest correlation value with the decoded received signal. If the maximum correlation value is greater than the set detection threshold, the corresponding synchronization signal is the detected synchronization signal, and the corresponding neighbor node is the detected neighbor node. During the search of this step, a larger search window is employed in the shift correlation because the position of the synchronization signal is unknown.

Step 3120, determine whether node a searches for the synchronization signal of the neighboring node?

If a synchronization signal of an adjacent node B is searched, step 3130 is performed; otherwise, go to step 3150.

Step 3130, determining a frame boundary of the radio frame of the node B based on the searched synchronization signal of the neighboring node, and using the frame boundary as the frame boundary of the radio frame of the node a itself.

Specifically, in step 3110, the synchronization signal of a neighboring node B has been searched using correlation, and the frame boundary of the neighboring node B is determined according to the position of the synchronization signal in the radio frame structure shown in fig. 1, and node a aligns the frame boundary of its own radio frame with the frame boundary of the neighboring node B, thereby achieving frame synchronization. Since the neighbor node B is already in the network and is already synchronized with other neighbors in the network, node a is also synchronized with other neighbors in the network, achieving frame synchronization of the entire network without a central device.

In step 3140, node a transmits its network entry data in a subsequent radio frame, where the radio frame transmitting the network entry data is determined based on collision detection.

The node A does not detect any synchronization signals of adjacent nodes in the first search window, and the node A sends network access data. The network access data is sent by adopting a method based on conflict detection so as to prevent the condition that other adjacent nodes are not detected by the node which is simultaneously accessed to the network. The node A detects whether a preamble signal sent by a neighboring node exists before a self-collision detection unit of a collision detection block of the current radio frame. If not, the network access data is not conflicted with other network access nodes, and the network access data is sent in the current wireless frame; if so, the network access node collides with other network access nodes to send data, and the network access data is tried to be sent in the next wireless frame.

Step 3150, node a searches for a synchronization signal of a neighboring node within a first search window from a randomly selected time point.

The method comprises the steps that a node A searches for a synchronous signal of a neighboring node in a first search window sheet from a random selection time point in order to prevent the condition that the node which simultaneously accesses to the network with the node A does not detect other neighboring nodes.

Network monitoring method of a wireless communication method embodiment two

Fig. 3C shows a flow of a network listening method according to a second embodiment of the wireless communication method, which includes the following steps:

step 3210, the node a in the listening mode detects the same-frequency signal and its adjacent-frequency signal of the frequency band used by the wireless network in a time slot other than the wireless frame in which the data is transmitted.

The same-frequency signal and adjacent-frequency signal of the wireless network can form interference, and the step not only detects the same-frequency signal of the frequency band used by the wireless network, but also detects the adjacent-frequency signal of the frequency band used by the wireless network. The detected on-channel signal may be some kind of interference, or may be an actual use signal of other neighboring nodes, and the signal used by such other neighboring nodes is also interference to the transmitting data of the node. The detected adjacent frequency signal is adjacent frequency interference.

And 3220, determining the interference condition of each time-frequency resource position of the wireless network based on the same-frequency signal and the adjacent frequency signal.

Wherein, when the co-frequency signal and the adjacent frequency signal detected in step 3210 send data to node a, both confirm to be interference, the intensities of the co-frequency signal and the adjacent frequency signal are represented by RSSI (Received Signal Strength Indication ). In order to accurately evaluate the interference condition of each time-frequency resource of the wireless network, the comprehensive evaluation of the co-frequency interference intensity RSSI and the adjacent frequency interference intensity RSSI is performed, and the interference evaluation method is the prior art and is not described in detail here.

Step 3230, selecting a time-frequency resource with small interference for transmitting data based on the interference status of each time-frequency resource position.

And according to the interference condition of each time-frequency resource position, determining whether each time-frequency resource reaches the minimum requirement of data coding or baseband modulation of the transmitted data, and sequencing the time-frequency resources meeting the requirement according to the interference condition from small to large so as to be convenient for selecting when transmitting the data.

Step 3240, searching the synchronization signals of each neighboring node from the same frequency signal, and determining the frame boundary of the current wireless frame of the searched neighboring node.

Specifically, the method in step 3110 in the synchronization method of the second embodiment of the wireless communication method is used to search for synchronization signals of possible neighboring nodes, thereby determining frame boundaries of the corresponding neighboring nodes. And storing each received adjacent node and the frame boundary thereof for use in the future when data is sent to the node in a directed manner. In this step node a has synchronized with the network and uses a smaller search window to quickly search for possible synchronization signals of neighboring nodes.

And step 3250, receiving the data of the adjacent node in the searched service bearing block of the adjacent node.

If it is detected in step 3240 that a neighboring node signal exists, the encoding mode used by the neighboring node is searched based on the synchronization signal of the neighboring node. For example, if it uses frequency hopping or time hopping or spreading, it can know its frequency hopping sequence and frequency hopping pattern or time hopping sequence and time hopping pattern or spreading code and spreading pattern. And decoding the data received in the service bearing block according to the frame structure shown in fig. 1 and the coding mode, so as to receive the data sent by the adjacent node, including network access data, broadcast service data and directional service data. When receiving data, the node A adjusts the gain of the radio frequency receiver according to the AGC signal, so as to accurately receive the data.

By monitoring the network signals by each node, the time-frequency resource with smaller interference is selected for the subsequent transmitted data, and the anti-interference capability of the network is improved. And simultaneously, searching the possible synchronization signals of the adjacent nodes based on the frame structure of the wireless frame, and determining the coding mode of the adjacent nodes so as to receive the data transmitted by the adjacent nodes.

[ A method for transmitting service data in Wireless communication method embodiment two ]

Fig. 3D shows a flow of a service data transmission method according to a second embodiment of the wireless communication method, which includes the following steps:

step 3410, determine whether it is directional transmission service data?

Wherein, the service data includes directional service data broadcast service data, if the service data is directional service data, the step 3420 is entered, otherwise the step 3430 is entered.

Step 3420, node a uses the frame boundary of the directional node as its own frame boundary.

The frame boundary of the directional node is used as the frame boundary of the node a, that is, the node a is in frame synchronization with the directional node, and the frame synchronization is finer synchronization based on the frame synchronization in step 310 of the first embodiment of the wireless communication method, so as to improve the accuracy of the directional node when receiving the directional data of the node a under the condition of complex multipath wireless environment, and reduce the error rate or frame error rate caused by multipath fading.

Step 3430, node a transmits the targeted traffic data or broadcast traffic data based on the traffic demand, wherein a radio frame transmitting the targeted traffic data or broadcast traffic data is determined based on collision detection.

Before the self-collision detection unit of the collision detection block of the current wireless frame, the node A detects whether the time collision of the data sent by other adjacent nodes exists. Based on the collision detection result, a radio frame transmitting the network data is determined. The method for transmitting directional service data or broadcast service data in this step refers to a data transmission method in the first embodiment of a wireless communication method.

Based on the conflict detection result of the conflict detection block of the wireless frame, the wireless frame of the network data is determined, and the anti-interference capability of the network is enhanced. Meanwhile, the synchronization process with a receiver is added for directional transmission, and the accuracy of the directional node in receiving the directional data of the node A under the condition of a complex multipath wireless environment is improved.

In summary, in the second embodiment of the wireless communication method, the network node realizes synchronization with the network node based on the synchronization signal of the wireless frame of the network node, so as to synchronize with the whole network, realize synchronization in the centerless network, and eliminate the influence of the potential problem of the complex center device on the network. The conflict detection unit based on the wireless frame detects the conflict with the data transmitted between the nodes, thereby improving the anti-interference capability of the network. And simultaneously, based on the interference condition of each time-frequency resource of the network obtained in the network monitoring mode, the time-frequency resource and the modulation mode of the transmitted data are selected, so that the anti-interference capability of the network is further improved.

[ one Wireless communication method embodiment III ]

The node of the third embodiment of the wireless communication method is in a low power consumption mode, inherits all the methods of the first embodiment of the wireless communication method, and has all the advantages; meanwhile, the synchronization method of the second embodiment of the wireless communication method is inherited, and the parts for increasing and changing the synchronization method are mainly described below.

Continuing with the example of node a, a flow of a third embodiment of a wireless communication method is shown in conjunction with fig. 4, which includes the following steps:

step 410, searching for a synchronization signal of the neighboring node after the node A is started, and implementing frame synchronization based on the searched synchronization signal of the neighboring node. The detailed method and advantages of this step are the same as step 310 of the second embodiment of the wireless communication method.

Step 420, node a periodically listens for neighboring node data.

Wherein in the low power mode, each node periodically receives data in a known time slot of a cycle. The neighbor node knows the monitored known time slots of node a and if data is to be sent to node a, sends data to node a in said known time slots of node a. The a node periodically receives data in its known time slots. The method for receiving data is the same as the step 3240 of the network listening method in the second embodiment of the wireless communication method.

Step 430, node a periodically broadcasts its network data. The broadcasting period of this step is longer than that of step 330 of the second embodiment of the wireless communication method, so as to save the electric quantity of the node, the interference to each time-frequency resource of the network is unknown when the data is transmitted, and the time-frequency resource meeting the bandwidth requirement of the data transmitted in the network is randomly selected, so that other detailed methods and advantages of this step are the same as step 330 of the second embodiment of the wireless communication method.

Step 440, node a transmits traffic data based on the traffic demand. In contrast to the step 340 of the second embodiment of the wireless communication method, the interference to each time-frequency resource of the network is unknown when the data is transmitted in this step, and the time-frequency resource satisfying the bandwidth requirement for transmitting the service data is randomly selected, and other detailed methods and advantages of this step are the same as the step 340 of the second embodiment of the wireless communication method.

Wherein, the execution sequence of step 420 and step 430 and step 440 is not sequential.

In summary, in the third embodiment of the wireless communication method, the network node realizes synchronization with the network node based on the synchronization signal of the wireless frame of the network node, so as to synchronize with the whole network, realize synchronization in a centerless network, and eliminate the influence of the potential problem of the complex center device on the network; the conflict detection unit based on the wireless frame detects the conflict with the data transmitted between the nodes, thereby improving the anti-interference capability of the network. Meanwhile, in the third embodiment of the wireless communication method, the real-time network monitoring mode is changed into the low-power consumption mode of periodic monitoring, so that the electric quantity of each node is saved, and the outdoor use time of each node is prolonged.

An embodiment of a wireless communication device according to the present invention is described below based on fig. 5 to 7.

[ one Wireless communication device embodiment ]

Fig. 5 shows a structure of a first embodiment of a wireless communication device, which includes the following modules:

the preamble transmission module 510 is configured to randomly select, by a node, its collision detection unit to transmit a preamble signal in the collision detection block of its current radio frame. The working principle and advantages thereof are seen in step 210 of a data transmission method of the first embodiment of the wireless communication method.

The collision judging module 520 judges whether a node receives a preamble signal of a neighboring node in a period from the start of the collision detecting block to the collision detecting unit. The working principle and advantages thereof are seen in step 220 of a data transmission method of the first embodiment of the wireless communication method.

The bearer data transmitting module 530 is configured to adjust the radio frequency device to a transmitting state by a node in the guard period GP1, and transmit the synchronization signal, the AGC signal, and the data in the service bearer block. The working principle and advantages thereof are seen in step 230 of a data transmission method of the first embodiment of the wireless communication method.

The data receiving second module 540 is configured to adjust the radio frequency device to a receiving state in the protection time GP1 by a node, and then receive data of an adjacent node in the service carrier. The working principle and advantages thereof are seen in step 240 of a data transmission method of the first embodiment of the wireless communication method.

In summary, in the first embodiment of the wireless communication apparatus, the collision detection unit based on the wireless frame detects the collision with the data transmitted between the nodes, thereby improving the anti-interference capability of the network.

[ one Wireless communication device embodiment two ]

Fig. 6A shows a structure of a second embodiment of a wireless communication device, which includes the following modules:

the synchronization module 610 is configured to search for a synchronization signal of an adjacent node after a node is powered on, and implement frame synchronization based on the searched synchronization signal of the adjacent node. The working principle and advantages thereof are seen in step 310 of a second embodiment of a wireless communication method. For its modular structure, see a synchronization module for a second embodiment of a wireless communication device.

The network monitoring module 620 is configured to monitor the signal of the neighboring node by a node, determine the occupation condition and the interference condition of each time-frequency resource, select the time-frequency resource used for data transmission, and receive the data transmitted by the neighboring node. The working principle and advantages thereof are seen in step 320 of a second embodiment of a wireless communication method. The module structure refers to a network monitoring module of the second embodiment of the wireless communication device.

The periodic broadcast module 630 is configured to periodically broadcast its network data by a node. The working principle and advantages thereof are seen in step 330 of a second embodiment of a wireless communication method. For its modular structure, reference is made to a wireless communication device implementation.

The service data sending module 640 is configured to send service data by a node based on a communication service requirement. The working principle and advantages thereof are seen in step 340 of a second embodiment of a wireless communication method. The module structure refers to a service data transmitting module of the second embodiment of the wireless communication device.

Fig. 6B shows a structure of a synchronization module of a second embodiment of a wireless communication device, which includes the following modules:

the start-up searching module 6110 is used for searching the synchronization signal of the adjacent node in the first searching window after a node is started up. For its working principle and advantages, see step 3110 of a synchronization method of a second embodiment of a wireless communication method.

The search judging module 6120 is used for a node to judge whether the synchronous signal of the adjacent node is searched. For its working principle and advantages, see step 3120 of a synchronization method of a wireless communication method embodiment two.

The frame boundary determining module 6130 is configured to determine, by a node, a frame boundary of the radio frame of the neighboring node based on the searched synchronization signal of the neighboring node, and serve as a frame boundary of the radio frame of the neighboring node. For its working principle and advantages, see step 3130 of a synchronization method of a second embodiment of a wireless communication method.

The network access data sending module 6140 is used for sending the network access data of a node. The working principle and advantages thereof are seen in step 6140 of the synchronization method of the second embodiment of the wireless communication method. For its modular structure, see one embodiment of a wireless communication device.

The random search module 6150 is used for searching the synchronous signals of the adjacent nodes in the first search window from the random selection time point of a node. The working principle and advantages thereof are seen in step 6150 of the synchronization method of the second embodiment of the wireless communication method.

Fig. 6C shows a structure of a network listening module of a second embodiment of a wireless communication device, which includes the following modules:

the signal search module 6210 is configured to detect the same-frequency signal and the adjacent-frequency signal of the frequency band used by the wireless network in a time slot other than the wireless frame where the node transmits data. The working principle and advantages thereof are seen in step 3210 of a network listening method according to the second embodiment of the wireless communication method.

The interference determining module 6220 is configured to determine an interference condition of each time-frequency resource location of the present wireless network based on the co-frequency signal and the adjacent frequency signal by a node. The working principle and advantages thereof are referred to as step 3220 of a network monitoring method of the second embodiment of the wireless communication method.

The time-frequency resource selecting module 6230 is configured to select, by a node, a time-frequency resource with small interference for transmitting data based on the interference condition of each time-frequency resource location. The working principle and advantages thereof are seen in step 3230 of a network listening method of the second embodiment of the wireless communication method.

The adjacent node frame boundary determining module 6240 is configured to search a synchronization signal of each adjacent node from the common-frequency signal, and determine a frame boundary of the current radio frame of each adjacent node. The working principle and advantages thereof are seen in step 3240 of a network listening method of the second embodiment of the wireless communication method.

The data receiving module 6250 is configured to, when the collision detecting block of the radio frame detects a preamble of a neighboring node, receive, at the service bearer, data of the neighboring node. The working principle and advantages thereof are seen in step 3250 of a network listening method of the second embodiment of the wireless communication method.

Fig. 6D shows a structure of a service data transmitting module of a second embodiment of a wireless communication method, which includes the following modules:

the service determining module 6410 is configured to determine whether the currently transmitted service data is directional transmission service data by a node. The working principle and advantages thereof are referred to as step 3410 of a service data transmission method of the second embodiment of the wireless communication method.

The frame boundary acquisition module 6420 is configured to use the frame boundary of the directional node as the frame boundary of the node a. The working principle and advantages thereof are referred to as a step 3420 of the service data transmitting method of the second embodiment of the wireless communication method.

The communication service data sending module 6430 is configured to send, by a node, directional service data or broadcast service data based on a communication service requirement. The working principle and advantages thereof are referred to as a step 3430 of the service data transmitting method of the second embodiment of the wireless communication method. For its modular structure, see one embodiment of a wireless communication device.

In summary, in the second embodiment of the wireless communication apparatus, the network node realizes synchronization with the network node based on the synchronization signal of the wireless frame of the network node, so as to synchronize with the whole network, realize synchronization with the centerless network, and eliminate the influence of the potential problem of the complex center device on the network. The conflict detection unit based on the wireless frame detects the conflict with the data transmitted between the nodes, thereby improving the anti-interference capability of the network. And simultaneously, based on the interference condition of each time-frequency resource of the network obtained in the network monitoring mode, the time-frequency resource and the modulation mode of the transmitted data are selected, so that the anti-interference capability of the network is further improved.

[ one Wireless communication device embodiment III ]

Fig. 7 shows the structure of a third embodiment of a wireless communication device, which includes the following modules:

the synchronization module 710 is configured to search for a synchronization signal of an adjacent node after a node is powered on, and implement frame synchronization based on the searched synchronization signal of the adjacent node. The working principle and advantages thereof are seen in step 410 of a third embodiment of a wireless communication method.

The period monitoring module 720 is configured to monitor the network by a node period. The working principle and advantages thereof are seen in step 420 of a third embodiment of a wireless communication method.

The periodic broadcast module 730 is configured to periodically broadcast its network data by a node. The working principle and advantages thereof are seen in step 430 of a third embodiment of a wireless communication method.

The service data sending module 740 is configured to send service data by a node based on the communication service requirement. For its principle of operation and advantages, see step 440 of a third embodiment of a wireless communication method.

In summary, in the third embodiment of the wireless communication apparatus, the network node realizes synchronization with the network node based on the synchronization signal of the wireless frame of the network node, so as to synchronize with the whole network, realize synchronization with the centerless network, and eliminate the influence of the potential problem of the complex center device on the network; the conflict detection unit based on the wireless frame detects the conflict with the data transmitted between the nodes, thereby improving the anti-interference capability of the network. Meanwhile, the third embodiment of the wireless communication device changes the real-time network monitoring mode into the low-power consumption mode of periodic monitoring, saves the electric quantity of each node, and prolongs the outdoor service time of each node.

[ computing device ]

The present invention also provides a computing device, described in detail below with respect to fig. 8.

The computing device 800 includes a processor 810, a memory 820, a communication interface 830, a bus 840.

It should be appreciated that the communication interface 830 in the computing device 800 shown in this figure may be used to communicate with other devices.

Wherein the processor 810 may be coupled to the memory 820. The memory 820 may be used to store the program code and data. Accordingly, the memory 820 may be a storage unit internal to the processor 810, an external storage unit independent of the processor 810, or a component including a storage unit internal to the processor 810 and an external storage unit independent of the processor 810.

Optionally, computing device 800 may also include a bus 840. The memory 820 and the communication interface 830 may be connected to the processor 810 through a bus 840. Bus 840 may be a peripheral component interconnect standard (Peripheral Component Interconnect, PCI) bus or an extended industry standard architecture (EFStended Industry Standard Architecture, EISA) bus, among others. The bus 840 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one line is shown in the figure, but not only one bus or one type of bus.

It should be appreciated that in embodiments of the present invention, the processor 810 may employ a Central Processing Unit (CPU). The processor may also be other general purpose processors, digital signal processors (digital signal proce synchronous or, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), off-the-shelf programmable gate arrays (field programmable gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. Or the processor 810 may employ one or more integrated circuits for executing associated routines to implement the techniques provided by embodiments of the present invention.

The memory 820 may include read only memory and random access memory and provides instructions and data to the processor 810. A portion of the processor 810 may also include non-volatile random access memory. For example, the processor 810 may also store information of the device type.

When the computing device 800 is running, the processor 810 executes computer-executable instructions in the memory 820 to perform the operational steps of the various method embodiments.

It should be understood that the computing device 800 according to the embodiments of the present invention may correspond to a respective subject performing the methods according to the embodiments of the present invention, and that the above and other operations and/or functions of the respective modules in the computing device 800 are respectively for implementing the respective flows of the methods according to the embodiments, and are not described herein for brevity.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. The storage medium includes various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

[ computer Medium ]

The embodiments of the present invention also provide a computer-readable storage medium having stored thereon a computer program for performing the operational steps of the method embodiments when executed by a processor.

The computer storage media of embodiments of the invention may take the form of any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Computer program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the above embodiments, but may include many other equivalent embodiments without departing from the spirit of the invention, which fall within the scope of the invention.

Claims

1. A method of wireless communication, comprising:

searching the synchronization signal of the adjacent node in a first search window when the node A is accessed to the network, and realizing frame synchronization based on the searched synchronization signal of the adjacent node;

when node A transmits data, a conflict detection unit of the current wireless frame is randomly selected from a conflict detection block of the current wireless frame to transmit a preamble signal;

when the node A does not receive the preamble signal of the adjacent node in the time period from the beginning of the conflict detection block to the front of the conflict detection unit, the node A sends data in the service bearing block of the current wireless frame;

The conflict detection block comprises a plurality of continuous long-time slices, each time slice corresponds to one conflict detection unit, and the service bearing block is a plurality of continuous time slices and is arranged behind the conflict detection block.

2. The method of claim 1, wherein when node a transmits data, further comprising: and when the conflict detection block starts and the preamble signal of the adjacent node is received in the time period corresponding to the conflict detection unit, receiving the data of the adjacent node in the service bearing block.

3. The method of claim 1, wherein the achieving frame synchronization based on the searched synchronization signal of the neighboring node comprises:

when the node A searches the synchronous signal of a neighboring node B, determining the frame boundary of the wireless frame of the node B;

the frame boundary of the radio frame of the node B is determined as the frame boundary of the radio frame of the node A itself.

4. The method of claim 1, wherein when the node a searches for the synchronization signal of the neighboring node in the first search window when entering the network, further comprising:

when the node A does not search for the adjacent node signal in the first search window, sending network access data of the node A in the next wireless frame;

And subsequently searching for synchronization signals of neighboring nodes within the first search window from a randomly selected time point.

5. The method as recited in claim 2, further comprising:

when the node A monitors a network, detecting the same-frequency signal of the frequency band used by the wireless network;

searching the synchronous signals of each adjacent node from the same-frequency signals, and determining the adjacent node sending the synchronous signals and the frame boundary of the current wireless frame of the adjacent node according to the synchronous signals; and

and receiving the data of the adjacent node in the service bearing block.

6. The method as recited in claim 5, further comprising: when the node A monitors the mode, the network monitoring is carried out in a time slot except a wireless frame for transmitting data;

detecting adjacent frequency signals of a wireless network using frequency band;

determining the interference condition of each time-frequency resource position of the wireless network based on the same-frequency signal and the adjacent frequency signal;

and selecting a time-frequency resource with small interference for transmitting data based on the interference condition of each time-frequency resource position.

7. The method of claim 6, wherein when node a is in the listening mode, further comprising: when data is transmitted, a modulation mode when the data is transmitted is determined based on the interference condition of the selected time-frequency resource, and the modulation order changes inversely with the interference.

8. The method as recited in claim 5, further comprising:

when the node A is in the low power consumption mode, the node A periodically monitors the network;

the time slots outside the network listening of the transmission data and period are in a closed state.

9. The method according to any one of claims 1 to 8, wherein when node a transmits data, further comprising: when the node A transmits data to the node A for transmitting the directional service data, the frame boundary of the wireless frame of the node A is determined as the frame boundary of the wireless frame of the node A.

10. A method according to any one of claims 1 to 8, wherein,

the service bearing block of the radio frame comprises a first set time slice, and the synchronization signal is sent at the node A of the first set time slice;

and/or, setting a second set time slice by the service bearing block of the radio frame, and transmitting an AGC signal with constant power at the second set time slice node A;

and/or, a first protection time slice is set between the conflict detection block and the service bearing block of the wireless frame, and the node A completes the receiving-transmitting switching in the first protection time slice;

and/or, setting a second protection time slice in front of the conflict detection block of the wireless frame, wherein the length of the second protection time slice is positively changed along with the communication distance of the wireless network;

And/or setting a third protection time slice before the end of the wireless frame, wherein the length of the third protection time slice is positively changed along with the communication distance of the wireless network.

11. A wireless communications apparatus, comprising:

the synchronization module is used for searching the synchronization signal of the adjacent node in the first search window when the node A enters the network and realizing frame synchronization based on the searched synchronization signal of the adjacent node;

the data transmission module is used for randomly selecting a conflict detection unit from conflict detection blocks of the current wireless frame to transmit a leading signal when a node A transmits data, and transmitting data on a service bearing block of the wireless frame when the conflict detection unit does not receive the leading signal of a neighboring node;

12. A computing device, comprising,

a bus;

a communication interface connected to the bus;

at least one processor coupled to the bus; and

at least one memory coupled to the bus and storing program instructions that, when executed by the at least one processor, cause the at least one processor to perform the method of any of claims 1 to 10.

13. A computer readable storage medium having stored thereon program instructions, which when executed by a computer cause the computer to perform the method of any of claims 1 to 10.