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Coordinated Duty Cycle Assignment in Mesh Grids

A work cycle, mesh network technology, applied in network topology, connection management, advanced technology, etc., can solve problems such as packet collision, loss, and complex routing and transmission

Active Publication Date: 2021-07-23
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It is recognized here that the disadvantage of flooding is that for packets to propagate through the network, nodes must be awake and ready to receive and send
Another disadvantage: Higher chance of packet collisions and loss when many devices broadcast simultaneously
This complicates routing and is not always a practical solution for low power mesh networks

Method used

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  • Coordinated Duty Cycle Assignment in Mesh Grids
  • Coordinated Duty Cycle Assignment in Mesh Grids
  • Coordinated Duty Cycle Assignment in Mesh Grids

Examples

Experimental program
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Embodiment Construction

[0030] Embodiments described herein provide ways to optimize the duty cycle of nodes in a mesh network based on the density of the mesh network. The density of a mesh network at any given point in the network is characterized by how many neighbors each node at that point has that can receive and forward messages. The operating duty cycle of each node's neighbors can then be set based on the number of neighbors, saving energy while still maintaining that at any given time at least one neighbor will be awake to receive and forward The predetermined probability of transmission. For example, the minimum required duty cycle percentage of each neighboring node can be shared, and each node can adopt a duty cycle percentage, while maintaining the reliability of the mesh network to forward messages such that all destination nodes receive the messages.

[0031] According to some embodiments, a node is capable of sending broadcast messages to and receiving broadcast messages from neighb...

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Abstract

In one aspect, a node in a mesh network receives presence messages from neighboring nodes in the mesh network and determines a number of neighboring nodes based on the received presence messages. The node determines a duty cycle percentage of the neighbor node to request based on the number of neighbor nodes, the duty cycle percentage indicating the minimum percentage of time the neighbor node should be awake to receive a message in order to ensure a predetermined probability that a message sent by the node is successfully received. Nodes broadcast the duty cycle percentage for reception by neighboring nodes. The node also receives the requested duty cycle percentage from the corresponding neighboring node, sets the operational duty cycle of the node based on the maximum duty cycle percentage among the received duty cycle percentages, and sleeps and wakes up according to the set duty cycle of the node .

Description

technical field [0001] The present invention relates generally to wireless communication networks, and in particular to the duty cycle of nodes in a mesh network. Background technique [0002] Low power wireless communication technologies use mesh network topologies to increase their coverage and flexibility. This technique requires the nodes of the mesh network to act as forwarders of packets or messages. As a result, a packet from a source may reach its destination through several other nodes, all of which receive and retransmit the packet. [0003] A simple and straightforward way to perform retransmissions is to broadcast the packet to every node that receives a transmission, but limit the number of transmissions to avoid loops with infinite retransmissions. This technique, called flooding, is widely used in computer networking and has been proposed to support mesh networking for wireless solutions such as Low Energy (BLE) solutions. Flooding requires no routing inf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/02H04W40/02H04W84/18
CPCH04W40/248H04W84/18H04W76/28H04W52/0232Y02D30/70
Inventor 罗曼·奇里科夫皮耶尔朱塞佩·迪马尔科
Owner TELEFON AB LM ERICSSON (PUBL)