Fast frequency-hopping schedule recovery
AssigneeCisco Technology, Inc.
InventorsJonathan W. Hui, Wei Hong, Jean-Philippe Vasseur
Life of this patent
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Abstract
In one embodiment, a device determines a need to resynchronize a broadcast and unicast frequency-hopping schedules on its network interface. In response to the need, the device may solicit the broadcast schedule from one or more neighbor devices having the synchronized broadcast schedule, and then establishes the unicast schedule for the network interface using communication during the synchronized broadcast schedule.
Claims20
A method, comprising:
- receiving, at a particular device in a computer network, a notice that a neighbor device has an impending de-synchronization of one or more of its broadcast and unicast frequency-hopping schedules with an expected time for the impending de-synchronization;
- awaiting expiration of the expected time;
- and
- in response to expiration of the expected time, asynchronously unicasting a message with resynchronization information for the one or more broadcast and unicast schedules to the neighbor device.
An apparatus, comprising:
- a network interface to communicate with a frequency-hopping communication network;
- a processor coupled to the network interface and adapted to execute one or more processes;
- and
- a memory configured to store a process executable by the processor, the process when executed operable to:
- receive a notice that a neighbor device has an impending de-synchronization of one or more of its broadcast and unicast frequency-hopping schedules with an expected time for the impending de-synchronization;
- await expiration of the expected time;
- and
- in response to expiration of the expected time, asynchronously unicast a message with resynchronization information for the one or more broadcast and unicast schedules to the neighbor device.
A tangible, non-transitory, computer-readable media having software encoded thereon, the software, when executed by a processor on an apparatus, operable to:
- receive a notice that a neighbor device has an impending de-synchronization of one or more of its broadcast and unicast frequency-hopping schedules with an expected time for the impending de-synchronization;
- await expiration of the expected time;
- and
- in response to expiration of the expected time, asynchronously unicast a message with resynchronization information for the one or more broadcast and unicast schedules to the neighbor device.
Dependencies are inferred from the claim text.