Systems and methods for reducing power consumption in communication networks

• US 7,978,717 B2
• Filed: 10/16/2008
• Issued: 07/12/2011
• Est. Priority Date: 10/16/2008
• Status: Active Grant

• Current Assignee: Synapse Wireless Incorporated (Mcwane Incorporated)
• Original Assignee: Synapse Wireless Incorporated (Mcwane Incorporated)
• Inventors: Ewing, David B., Banks, Kevin
• Primary Examiner(s): Phan; Man
• Application Number:
  US12/253,086
• Publication Number:
  US 20100098102A1
• Time in Patent Office: 999 Days
• Field of Search: 370254-315, 370328-338, 370401-406, 455458-550, 709220-227
• US Class Current: 370/406
• CPC Class Codes: H04W 52/0235 where the received signal is a power saving command
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The present disclosure generally relates to systems and methods for reducing power consumption in communication networks. In one exemplary embodiment, a system includes a leader node in communication with a plurality of follower nodes. The leader node causes the leader and follower nodes to transition from an awake mode to a sleep mode where they consume less power. An exemplary embodiment of a method includes the steps of configuring nodes in a communication network as follower nodes and configuring a node in the communication network as a leader node. The leader node is configured to cause the leader and follower nodes to alternate between an awake mode and a sleep mode. The leader and follower nodes consume less power when in the sleep mode than when in the awake mode.

Claims

1. A system for reducing power consumption in a wireless mesh communication network, comprising:

a plurality of follower nodes; and

a leader node in communication with the plurality of follower nodes, the leader node being operable to transmit a sleep command to the plurality of follower nodes thereby causing the plurality of follower nodes to transition from an awake mode to a sleep mode, the leader node and the plurality of follower nodes consuming less power in the sleep mode than when in the awake mode, wherein the leader node is configured to synchronize, via the sleep command, a transition of the plurality of nodes from the awake mode to the sleep mode, wherein the sleep command is a multicast message, and wherein each of the plurality of follower nodes is operable to transition to the sleep mode in response to the sleep command without further communicating with the leader node prior to transitioning to the sleep mode, wherein the leader node is operable to transmit a notification to the plurality of follower nodes, the notification indicating when a transmission of a future sleep command is expected, wherein the plurality of followers nodes are operable to elect a new leader node if the leader node fails to transmit the future sleep command within a grace period of a time indicated by the notification for the transmission of the future sleep command.

2. The system of claim 1, wherein election of the new leader node is based on unique identifiers associated with the plurality of follower nodes.

3. The system of claim 1, wherein any one of the plurality of follower nodes can initiate an election of the new leader node.

4. The system of claim 1, wherein an election of the new leader node is initiated by one of the plurality of follower nodes nominating itself as the new leader node.

5. The system of claim 1, wherein an election of the new leader node is completed when each one of the plurality of follower nodes has performed a check to determine if it should be the new leader node and, if so, nominated itself as the new leader node.

6. The system of claim 1, wherein only a portion of the plurality of follower nodes periodically transition from the awake mode to the sleep mode.

12. The system of claim 1, wherein the sleep command transmitted from the leader node to the plurality of follower nodes includes a value for specifying a duration that each of the plurality of follower nodes is to remain in the sleep mode, and wherein each of the plurality of follower nodes is configured to schedule an awakening from the sleep mode based on the value.

13. The system of claim 1, wherein each of the follower nodes has a control setting indicating whether the respective follower node is enabled to nominate itself as the new leader node, wherein the control setting of at least one of the follower nodes is set such that the at least one follower node is disabled for nominating itself as the new leader node.

14. The system of claim 1, wherein the new leader node is operable to revert back to a follower node in response to a sleep command.

7. A method of reducing power consumption in a wireless mesh communication network, comprising:

communicating messages among a plurality of follower nodes;

transitioning the plurality of follower nodes from an awake mode to a sleep mode, the plurality of follower nodes consuming less power when in the sleep mode than when in the awake mode;

synchronizing the transitioning step by transmitting a sleep command from a leader node to the plurality of follower nodes, wherein the sleep command is a multicast message, wherein the transmitting comprises rebroadcasting the sleep command via at least one of the follower nodes, and wherein each of the follower nodes transitions from the awake mode to the sleep mode in response to the sleep command without further communicating with the leader node prior to transitioning to the sleep mode;

transmitting a notification from the leader node to the plurality of follower nodes, the notification indicating when a transmission of a future sleep command is expected; and

electing a new leader node if the leader node fails to transmit the future sleep command within a grace period of a time indicated by the notification for the transmission of the future sleep command.

8. The method of claim 7, wherein the electing is based on unique identifiers respectively associated with each of the plurality of follower nodes.

9. The method of claim 7, further comprising disabling at least one of the plurality of follower nodes from nominating itself as the new leader node before the electing.

10. The method of claim 7, further comprising reverting the new leader node back to a follower node in response to a sleep command.

11. The method of claim 7, wherein the sleep command transmitted from the leader node to the plurality of follower nodes includes a value for specifying a duration that each of the follower nodes is to remain in the sleep mode, and wherein the method further comprises scheduling, at each of the plurality of follower nodes, a transition from the sleep mode to the awake mode based on the value.