Communication method for mesh and star topology structure wireless sensor network
First Claim
1. A method for wireless sensor network (WSN) communication in a mesh and star topology network (MSTN), comprising the steps of:
- a) connecting a plurality of nodes in a WSN to form a mesh and star hybrid topology structure;
b) based on the topology structure, defining a superframe structure based on IEEE 802.15.4-2006;
c) based on the topology structure and superframe structure, defining methods for long period data processing, connectivity assessment, medium access control, channel measurement, frequency hopping, beacon frame formation, and two-stage resource allocation;
d) based on the topology structure, superframe structure, and methods, defining a method for network establishment; and
e) based on the network establishment method, defining a method for MSTN communications,wherein the superframe structure is based on a medium access control (MAC) layer of IEEE 802.15.4-2006 and comprises a beacon frame period, a contention access period (CAP), a contention-free access period (CFP), an intra-cluster communication period, an inter-cluster communication period, and a sleeping period;
wherein the beacon frame period is used for timeslot synchronization and superframe information publishing;
the CAP is used for node addition and intra-cluster management, and realizes medium access control using the timeslot carrier sense multiple access with collision avoidance (CSMA/CA) algorithm;
the CFP is used for emergency communications, communications among handheld nodes and cluster heads, which are distributed by the routing nodes;
the CFP employs a time division multiple access (TDMA) to achieve communication;
the intra-cluster communication period, which is used for intra-cluster communication, expands the CFP;
the inter-cluster communication period is used for the inter-cluster communication and management; and
both intra-cluster communication and inter-cluster communication adopt the TDMA approach and timeslot frequency hopping communication, and communication resources are written to the nodes in the form of <
channel, timeslot>
.
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Abstract
A method of achieving wireless sensor network (WSN) communication in a mesh and star topology network (MSTN), including: a) connecting a plurality of nodes in a WSN to form a mesh and star hybrid topology structure; b) based on the topology structure, defining a superframe structure based on IEEE 802.15.4-2006; c) based on the topology structure and superframe structure, defining methods for long period data processing, connectivity assessment, medium access control, channel measurement, frequency hopping, beacon frame formation, and two-stage resource allocation; d) based on the topology structure, superframe structure, and methods, defining a method for network establishment; and e) based on the network establishment method, defining a method for MSTN communications. The method features real-time communication, high reliability, and low energy consumption.
15 Citations
19 Claims
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1. A method for wireless sensor network (WSN) communication in a mesh and star topology network (MSTN), comprising the steps of:
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a) connecting a plurality of nodes in a WSN to form a mesh and star hybrid topology structure; b) based on the topology structure, defining a superframe structure based on IEEE 802.15.4-2006; c) based on the topology structure and superframe structure, defining methods for long period data processing, connectivity assessment, medium access control, channel measurement, frequency hopping, beacon frame formation, and two-stage resource allocation; d) based on the topology structure, superframe structure, and methods, defining a method for network establishment; and e) based on the network establishment method, defining a method for MSTN communications, wherein the superframe structure is based on a medium access control (MAC) layer of IEEE 802.15.4-2006 and comprises a beacon frame period, a contention access period (CAP), a contention-free access period (CFP), an intra-cluster communication period, an inter-cluster communication period, and a sleeping period; wherein the beacon frame period is used for timeslot synchronization and superframe information publishing;
the CAP is used for node addition and intra-cluster management, and realizes medium access control using the timeslot carrier sense multiple access with collision avoidance (CSMA/CA) algorithm;
the CFP is used for emergency communications, communications among handheld nodes and cluster heads, which are distributed by the routing nodes;
the CFP employs a time division multiple access (TDMA) to achieve communication;
the intra-cluster communication period, which is used for intra-cluster communication, expands the CFP;
the inter-cluster communication period is used for the inter-cluster communication and management; and
both intra-cluster communication and inter-cluster communication adopt the TDMA approach and timeslot frequency hopping communication, and communication resources are written to the nodes in the form of <
channel, timeslot>
. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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