CN115038139A - Wireless sensor network suitable for use under field environment - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
- H04W40/10—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources based on available power or energy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
- H04W40/32—Connectivity information management, e.g. connectivity discovery or connectivity update for defining a routing cluster membership
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a wireless sensor network suitable for being used in a field environment. By setting corresponding networking, data transmission and dormancy schemes for manually laying nodes and airdrop laying nodes, the problems of low practicability, few access modes, low anti-interference capability, large power consumption and non-uniform network architecture of a field unattended wireless sensor network are solved, and the wireless sensor network has the advantages of anti-interference performance, self-healing performance, large network capacity, good stability and the like.
Description
Technical Field
The invention relates to the field of wireless sensor networks, in particular to a wireless sensor network suitable for being used in a field environment.
Background
The wireless sensor network is composed of a plurality of types of wireless sensors which are distributed at fixed points or randomly, a self-adaptive network topological structure can be quickly formed, distributed dynamic information is cooperatively sensed and processed to form an autonomous comprehensive information system, the sensor technology, the embedded technology, the distributed processing technology and the communication technology are integrated, various environment or monitoring object information in a network distribution area can be cooperatively monitored, sensed and collected in real time, the information is processed, and detailed and accurate information is obtained and is transmitted to users needing the information. The sensor network can enable people to obtain a large amount of reliable information at any time, place and under any environmental condition, and is widely applied to the fields of national defense and military, national security, environmental monitoring, intelligent transportation, medical treatment and health, manufacturing industry, anti-terrorism and disaster resistance and the like.
Sensor networks in field environments often adopt modes of manually laying key position sensors or air drop sensors and the like to lay various sensors or composite sensors in field unattended environments, and very high requirements are provided for the flexible access capability, self-organization capability, survivability, anti-interference capability, power consumption, life cycle and the like of the networks.
The research of the sensor network is mostly stopped in the civil fields such as electric power meter reading, intelligent home and the like, so that the problems of low practicability, few access modes, low anti-interference capability, non-uniform network architecture and the like exist in the application of the conventional wireless sensor network system in the special field. The field wireless sensor network in the field environment adopts manual work or air drop arrangement of sensor nodes, the nodes are in the unattended environment, the node energy is limited, the position cannot be preset, after the sensors generate detection data, the transmission reliability requirement is high, after networking, a flexible access mode is required to be selected, and complex interference exists in the field environment seriously.
Disclosure of Invention
The present invention is directed to a wireless sensor network suitable for use in a field environment to solve the above problems. Therefore, the technical scheme adopted by the invention is as follows:
a wireless sensor network suitable for being used in a field environment comprises a plurality of manual layout nodes and a plurality of air-drop layout nodes, wherein the manual layout nodes are subjected to necessary monitoring and data acquisition when access equipment does not exist, and wait for the occurrence of the access equipment; when the access equipment exists, accessing to the networking of an access system; for the airdrop layout nodes, the networking scheme is divided into intra-cluster system networking and access system networking; when all the manually laid nodes appointed by the access equipment are accessed and other cluster heads except the cluster head refusing to be accessed are accessed in all the appointed clusters, networking is successful; when the networking is unsuccessful, the access equipment re-initiates the networking process, if the set retransmission times are reached, the access equipment does not successfully access the node, reports the problem and enters an access state with the accessed node; after networking is successful, when the access equipment exists and data needs to be transmitted, the network enters transmission, and when the access equipment does not exist or data does not exist, the network enters a sleep mode.
Further, the process of the intra-cluster system networking is as follows:
selecting and generating cluster heads according to the weighting indexes;
after the cluster head node is generated, other nodes are informed of being a cluster head by broadcasting in the cluster, and the other nodes confirm through response;
when the residual energy of the cluster head node is low, the cluster head node actively initiates a cluster head re-election process;
if a node which cannot be directly connected with the cluster head node exists in the cluster, selecting a node which is connected with the cluster head and has good link quality and more residual energy in the cluster as a relay node;
the cluster head nodes broadcast beacons regularly, maintain the network in the cluster, monitor the working time range of the surrounding cluster heads periodically and avoid conflicts.
Further, the cluster heads are re-elected periodically.
Further, the specific process of networking of the access system is as follows:
firstly, an access device broadcasts an access system networking command, a cluster which wants to receive reported data is specified in the command, and a cluster head of the specified cluster is connected with the access device;
after the cluster head establishes connection with the access equipment, a response is sent to the access equipment, wherein the response comprises the ID of the cluster head node;
if cluster head nodes which cannot be directly connected with the access equipment exist, a path formed by accessed neighbor cluster head nodes is selected according to link quality, residual energy and position information to relay own signals;
if the appointed cluster has access to other access equipment with higher priority, a rejection message is sent to the access equipment;
if the appointed cluster is accessed to other access equipment with lower cable level, a release message is sent to the accessed other access equipment, and the access equipment is accessed.
Furthermore, when data transmission is carried out, the manual layout node directly converges the data to the access equipment; and the airdrop laying node converges data to the access equipment through the cluster head node.
Further, the non-image data is sent to the access equipment according to time slots; and for image data, a dynamic reservation mode is adopted to allocate a guaranteed time slot for transmission.
Further, for the airdrop distribution node, the data transmission further comprises an intra-cluster access process, the intra-cluster access adopts a mixed strategy of combining competition and reservation, wherein the intra-cluster system time slot is divided into one path of control time slot and a plurality of paths of data time slots; the data time slot is divided into a competition access period and a competition-free access period; and for non-image data, transmitting the non-image data in a contention access period, and using a time slot corresponding to the contention access period by adopting a contention random backoff mode.
Further, for nodes participating in data relay forwarding, a hybrid sleep mode is adopted; and adopting an autonomous sleep mode for nodes which do not participate in data relay forwarding.
Further, the hybrid sleep mode includes synchronous sleep and asynchronous sleep; the asynchronous sleeping node automatically enters a low-power-consumption sleeping state according to a preset sleeping time slice after being idle, enters a monitoring time slice when the sleeping time slice is finished, enters a normal working mode when needed if an effective message in a network is received in the monitoring time slice, and otherwise enters the next sleeping time slice, and the process is repeated; and broadcasting a synchronous dormancy broadcast message at the end of each 'working time slice', wherein the synchronous dormancy broadcast message carries the length information of the 'dormancy time slice', and if the synchronous dormancy broadcast message is not received, the node is automatically switched to an asynchronous dormancy mode.
Furthermore, the asynchronous dormancy node is awakened in a multi-time message sending mode.
The invention solves the problems of low practicability, few access modes, low anti-interference capability, larger power consumption and non-uniform network architecture of the field unattended wireless sensor network, and has the advantages of anti-interference, self-healing, large network capacity, good stability and the like.
Drawings
FIG. 1 is a schematic diagram of a wireless sensor network suitable for use in a field environment according to the present invention;
FIG. 2 is a schematic diagram of a wireless sensor network suitable for use in a field environment, in accordance with an embodiment of the present invention;
FIG. 3 is a flow diagram of intra-cluster system networking;
FIG. 4 is a flow chart of access system networking;
fig. 5 is a schematic diagram of a sleep mode.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.
In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that an embodiment can be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.
Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrase "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In the following description, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms will be used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be construed as words of convenience and should not be construed as limiting terms.
Referring to fig. 1 and 2, fig. 1 shows a hierarchical management structure of a wireless sensor network suitable for use in a field environment, and fig. 2 shows a specific example of a wireless sensor network suitable for use in a field environment. The network mainly comprises sensor devices 21-29, 31 and 32 and access device 11. The sensors in the network include various kinds, such as a sensor for sensing vibration, a sensor for sensing sound, a sensor for sensing an image, a combination sensor thereof, and the like. The sensors can be arranged in the field in a large range and are used for detecting target signals in the field environment. In use, sensors are usually deployed manually at key positions or massively in an air-drop mode to meet different monitoring requirements.
For sensors that use an artificial layout, i.e. sensors 31, 32, typically key node sensors. The sensor sends the data directly to the access device. After the access device 11 enters the network, a sensor node, such as the sensor 32, which needs to be received is designated, and the designated sensor uses the access device as a superior device to report the acquired data to the access device. If the sensor node and the access node cannot directly communicate, data forwarding can be performed through the base station equipment. For example, the sensor 31 cannot communicate directly with the access device 11 and relays using the base station 41.
For the sensors distributed in the unmanned aerial vehicle air-drop mode, for example, the sensors 21-29 are thrown in groups in the air-drop mode. Each group comprises a certain number of sensors and throws a plurality of groups towards different directions. A group of sensors forms a cluster. The intra-cluster nodes autonomously select one node as a cluster head node, for example, the sensors 21, 23, 26, 28, and maintain and manage the intra-cluster nodes. After the access equipment enters the network, monitoring is carried out, and then a cluster needing to receive the message is appointed. And the nodes in the appointed cluster report the data to the access equipment through respective cluster head nodes.
Access device 11 comprises a handheld device, a portable access device, or the like. There may be multiple access devices in the network or there may be different kinds of access devices. The low-level access device can access the high-level access device to form a multi-layer access structure. For example, several handheld devices may access an upper level portable access device. Each access device is provided with different priority levels, and when one node sensor or a cluster is specified by a plurality of access devices, the access device with the higher priority level is selected to access, and the specification of other access devices is refused.
Network functions are classified into a networking mode, an access mode, and a sleep mode.
And after the system is started, automatically entering a networking mode. And adopting different networking strategies for the nodes which are manually laid and the nodes which are laid without throwing.
For manually laying out nodes, e.g. sensors 31, 32, when no access device is present, the nodes perform the necessary listening and data acquisition and wait for the presence of an access device. And when the access equipment exists, entering into networking of an access system. Firstly, the access equipment broadcasts an access system networking command, and a node which wants to receive reported data is specified in the command. The designated node sends a reply to the access device. If the access equipment can not be directly connected with the base station, the relay forwarding is carried out through the base station. For example, the sensor 31 cannot communicate directly with the access device 11 and is relayed using the base station 41.
For the airdrop distribution node, the networking scheme is divided into intra-cluster system networking and access system networking.
The intra-cluster system networking can also be performed when the access equipment does not exist. As shown in FIG. 3, cluster heads, such as sensors 21, 23, 26, 28 of FIG. 2, are first generated based on weighted index elections. In the stage of electing the cluster head, the nodes in the cluster broadcast the position information, the residual energy information and the monitored information (including transmission link quality information, receiving times and the like) of other members in the cluster within the range of the cluster. And each node uses the weighting index to elect to generate a node with a relative position center, good link quality and more residual energy as a cluster head node according to the obtained information of the members in the cluster. The cluster head can be elected again regularly, and the situation that the cluster head node cannot be used due to too large energy consumption for bearing the relay forwarding task is avoided. When the remaining energy of the cluster head node is low, the cluster head node can also actively initiate the cluster head re-election process. After the cluster head node is generated, other nodes are informed of being the cluster head by broadcasting in the cluster, and the other nodes confirm through response. If there is a node in the cluster that cannot be directly connected to the cluster head node, a node that has been connected to the cluster head and has good link quality and a large amount of residual energy is selected as a relay node in the cluster, for example, the sensor 29 cannot directly connect to the sensor 23 as the cluster head, and is relayed by the sensor 24, that is, the sensor 24 serves as an intra-cluster relay node. And then, the cluster head nodes broadcast beacons regularly, maintain the intra-cluster network, monitor the working time range of surrounding cluster heads periodically and avoid conflicts.
As shown in fig. 4, when the access system is networked, the access device first broadcasts an access system networking command, where the command specifies a cluster that is expected to receive reported data, and a cluster head of the specified cluster is to establish a connection with the access device. After the cluster head establishes connection with the access device, a response is sent to the access device, wherein the response comprises the ID of the cluster head node. If cluster head nodes which cannot be directly connected with the access equipment exist, a path formed by accessed neighbor cluster head nodes is selected according to information such as link quality, residual energy, position and the like to relay own signals. For example, the cluster head 26 cannot directly connect to the access device 11, so the cluster head 23 is selected as a relay, and a message is sent to inform the cluster head 23; the cluster head 23, knowing the relay which has become the cluster head 26, transmits relay information to the access device 11. If the assigned cluster has access to other access devices with higher priority, a reject message will be sent to this access device. If the appointed cluster has access to other access equipment with lower cable level, a release message is sent to the other access equipment which has access, and the access equipment is accessed.
And when all the manually laid nodes appointed by the access equipment are accessed and other cluster heads except the cluster head refusing to be accessed are accessed in all the appointed clusters, the networking is successful. If the networking is unsuccessful, the access device will reinitiate the networking process, if the set retransmission times is reached, the access device will report the problem and enter the access state with the accessed node if the node is not successfully accessed.
When the access equipment exists and data needs to be transmitted, the network enters transmission. And the manual layout node directly converges the data to the access equipment. And the airdrop distribution node converges the data to the access equipment through the cluster head node. For example, sensors 22 are located within a cluster of cluster heads 21, and are maintained and managed by cluster heads 21. The data collected by the sensor 22 is sent to the cluster head 21, and then the value access device 11 is sent through the cluster head 21. The access equipment allocates static time slots for non-image data of the manually-arranged nodes and the cluster heads, and the data are sent to the access equipment according to the time slots. For image data, as the data volume is large, a dynamic reservation mode is adopted to allocate and guarantee the time slot for transmission.
For the air-drop sensor, besides data transmission between the cluster head and the access node, an intra-cluster access process is added, namely the intra-cluster node converges data to the cluster head node. The access in the cluster adopts a mixed strategy of combining competition and reservation. The system time slot in the cluster is divided into a control time slot and a plurality of data time slots. The data time slot is divided into a contention access period and a contention free access period. For small data volume burst transmission of non-image sensors such as vibration and sound, the time slot corresponding to the contention access period is used in a contention random backoff mode during the contention access period. The contention free access period consists of zero or more guaranteed time slots. The device is used for transmitting data collected by the image sensor. The data volume is large, and a dynamic reservation mode is adopted to distribute and guarantee time slots for transmission. Different clusters operate at different time intervals to prevent collisions. There are inter-cluster guard gaps between time intervals of different clusters.
After networking is finished, when no access device or no data transmission exists, the network enters a sleep mode.
As shown in fig. 5, the system guarantees low power consumption of the network by combining various sleep policies. For devices participating in data relay forwarding, e.g. sensors 23, 24 in fig. 2, a hybrid sleep mode is employed. All nodes in the network that undertake the relay forwarding task can go to sleep. The sleeping nodes and the non-sleeping nodes can be combined to be networked. For nodes which do not participate in data relay forwarding, an autonomous sleep mode with longer sleep time is adopted, and the power consumption of equipment is greatly reduced.
The hybrid sleep mode combines synchronous sleep and asynchronous sleep. After the asynchronous dormant node is idle, the asynchronous dormant node automatically enters a low-power-consumption dormant state according to a preset dormant time slice. And entering a 'monitoring time slice' when the 'sleeping time slice' is finished, if an effective message in the network is received in the 'monitoring time slice', the node enters a normal working mode when needed, otherwise, entering the next 'sleeping time slice', and repeating the process. The lengths of the sleep time slices and the listening time slices are flexibly set according to actual needs. The asynchronous dormancy node is awakened in a mode of sending messages for multiple times. The method has the advantages of safety, reliability and less time consumption, can exchange information such as routing and the like at awakened colleagues, can ensure that all dormant nodes can be awakened, has high awakening speed and has short and fixed awakening time delay independent of network scale. After being awakened, the asynchronous sleep node can be selectively switched to a synchronous sleep mode or an asynchronous sleep mode according to the flag bit in the data message header. The node sleep time slices in the synchronous sleep mode are synchronized by synchronous sleep broadcast messages. The synchronous dormancy broadcast message is broadcast when each 'working time slice' is finished, and the message carries the length information of the 'dormancy time slice'. If the synchronous dormancy broadcast message is not received, the node is automatically switched to an asynchronous dormancy mode.
That is to say, at the beginning, the node is in an asynchronous sleep mode, the module is waken up to enter "working time slice 1" through asynchronous sleep wake-up, and meanwhile, the current working time slice is designated to adopt a synchronous sleep mode, and at the wake-up end time, the module is regarded as being automatically switched to the synchronous sleep mode. After the exchange of data messages is completed, the end time of the "working slot 1" is indicated by the synchronous dormancy message and the length of the "dormancy slot 1" immediately following synchronous dormancy is specified. Asynchronous sleep "working slot 2" starts immediately after "sleep slot 1" ends, and since the slot is initially synchronous, data packet exchange can occur immediately without the need for an asynchronous wake-up process. And after the data message of the working time slice 2 is received and sent, switching to the asynchronous sleep mode again.
For nodes which do not need to participate in data relay forwarding, an autonomous sleep mode is adopted, and the sleep time is longer. The nodes which are in autonomous dormancy enter into work when data transmission and monitoring are needed, and enter into dormancy at other times.
For the physical layer of the network, a broadband spread spectrum communication mode is adopted, so that the transmission problems of instability of a sensor earth surface distribution link, serious multipath attenuation, signal interference, interception and the like can be effectively solved, the anti-interference, anti-interception and transmission performances of the network are obviously improved, and the safety and the stability of the network are ensured.
The signal transmission of the network uses single frequency point and point-to-point earth surface transmission. The transmitting power and the transmission rate are adjustable, and the Beidou positioning information, the signal intensity indication, the battery power and other information can be used for networking indexes.
While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.
These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.
Claims (10)
1. A wireless sensor network suitable for being used in a field environment is characterized by comprising a plurality of manual layout nodes and a plurality of air-drop layout nodes, wherein the manual layout nodes are capable of performing hybrid networking, and when access equipment does not exist, the nodes perform necessary monitoring and data acquisition and wait for the occurrence of the access equipment; when the access equipment exists, accessing to the networking of an access system; for the airdrop layout nodes, the networking scheme is divided into intra-cluster system networking and access system networking; when all the manually laid nodes appointed by the access equipment are accessed and other cluster heads except the cluster head refusing to be accessed are accessed in all the appointed clusters, networking is successful; if the networking is unsuccessful, the access equipment re-initiates the networking process, if the set retransmission times is reached, the access equipment reports the problem and enters an access state with the accessed node if the node is not successfully accessed; after networking is successful, when the access equipment exists and data needs to be transmitted, the network enters into transmission, and when the access equipment does not exist or data does not exist, the network enters into a sleep mode.
2. The wireless sensor network according to claim 1, wherein the process of networking the intra-cluster system is:
selecting and generating cluster heads according to the weighting indexes;
after the cluster head node is generated, other nodes are informed of being a cluster head by broadcasting in the cluster, and the other nodes confirm through response;
when the residual energy of the cluster head node is low, the cluster head node actively initiates a cluster head re-election process;
if a node which cannot be directly connected with the cluster head node exists in the cluster, selecting a node which is connected with the cluster head and has good link quality and more residual energy in the cluster as a relay node;
the cluster head nodes broadcast beacons regularly, maintain the network in the cluster, monitor the working time range of the surrounding cluster heads periodically and avoid conflicts.
3. The wireless sensor network of claim 2, wherein the cluster head re-elects periodically.
4. The wireless sensor network according to claim 1, wherein the specific process of accessing system networking is:
firstly, the access equipment broadcasts an access system networking command, a cluster which wants to receive reported data is specified in the command, and a cluster head of the specified cluster is connected with the access equipment;
after the cluster head establishes connection with the access equipment, sending a response to the access equipment, wherein the response comprises the ID of the cluster head node;
if cluster head nodes which cannot be directly connected with the access equipment exist, a path formed by accessed neighbor cluster head nodes is selected according to link quality, residual energy and position information to relay own signals;
if the appointed cluster has access to other access equipment with higher priority, a rejection message is sent to the access equipment;
if the appointed cluster is accessed to other access equipment with lower cable level, a release message is sent to the accessed other access equipment, and the access equipment is accessed.
5. The wireless sensor network of claim 1, wherein the manual routing node directly aggregates data to the access device when data transmission is performed; and the airdrop laying node converges data to the access equipment through the cluster head node.
6. The wireless sensor network of claim 5, wherein for non-image-like data, it is sent to the access device in time slots; and for image data, a dynamic reservation mode is adopted to allocate a guaranteed time slot for transmission.
7. The wireless sensor network according to claim 6, wherein for the air-drop layout node, the data transmission further comprises an intra-cluster access process, the intra-cluster access employs a hybrid strategy combining contention and reservation, wherein the intra-cluster system time slot is divided into one path of control time slot and a plurality of paths of data time slots; the data time slot is divided into a competition access period and a competition-free access period; and for non-image data, transmitting the non-image data in a contention access period, and using a time slot corresponding to the contention access period in a contention random backoff mode.
8. The wireless sensor network of claim 1, wherein a hybrid sleep mode is employed for nodes participating in data relay forwarding; and adopting an autonomous sleep mode for nodes which do not participate in data relay forwarding.
9. The wireless sensor network of claim 8, wherein the hybrid sleep mode comprises synchronous sleep and asynchronous sleep; the asynchronous sleeping node automatically enters a low-power-consumption sleeping state according to a preset sleeping time slice after being idle, enters a monitoring time slice when the sleeping time slice is finished, enters a normal working mode when needed if an effective message in a network is received in the monitoring time slice, and otherwise enters the next sleeping time slice, and the process is repeated; and broadcasting a synchronous dormancy broadcast message at the end of each 'working time slice', wherein the synchronous dormancy broadcast message carries the length information of the 'dormancy time slice', and if the synchronous dormancy broadcast message is not received, the node is automatically switched to an asynchronous dormancy mode.
10. The wireless sensor network according to claim 9, wherein the asynchronous sleeping node wakes up by sending a message multiple times.
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| CN202210526705.1A CN115038139A (en) | 2022-05-16 | 2022-05-16 | Wireless sensor network suitable for use under field environment |
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| CN101286911A (en) * | 2008-03-05 | 2008-10-15 | 中科院嘉兴中心微系统所分中心 | Networking method of wireless sensor network based on combination of cluster and Mesh |
| CN102149160A (en) * | 2011-04-20 | 2011-08-10 | 宁波职业技术学院 | Energy perception routing algorithm used for wireless sensing network |
| US20120213062A1 (en) * | 2010-01-08 | 2012-08-23 | Shenyang Institute Of Automation Of The Chinese Academy Of Sciences | Method of two-stage adaptive frequency hopping for clustered wireless sensor network |
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| CN101286911A (en) * | 2008-03-05 | 2008-10-15 | 中科院嘉兴中心微系统所分中心 | Networking method of wireless sensor network based on combination of cluster and Mesh |
| US20120213062A1 (en) * | 2010-01-08 | 2012-08-23 | Shenyang Institute Of Automation Of The Chinese Academy Of Sciences | Method of two-stage adaptive frequency hopping for clustered wireless sensor network |
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