US 8,879,613 B1Granted

Dynamic frame selection when requesting tone map parameters in mesh networks

AssigneeCisco Technology, Inc.

InventorsJonathan W. Hui, Wei Hong, Jean-Philippe Vasseur

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Abstract

In a multiple interface, low power and lossy network comprising a plurality of nodes, a sender node dynamically selects a data packet for setting a transmission parameter request in response to determining that an age value for a set of transmission parameters associated with a recipient device has expired or is expiring. The sender node selects an desired data packet for sending a transmission parameter request and transmits the selected data packet to the recipient device. The sender node receives a transmission parameter response from the recipient node comprising updated transmission parameters for that recipient node and then updates the current transmission parameters associated with the recipient node accordingly.

Claims20

Dependent claims

A method, comprising:

in a low power and lossy network (LLN) comprising one or more interfaces and a plurality of nodes, preparing, by a sender node, data for transmission to a recipient node via a communication medium;
determining, by the sender node, if an age value for a current set of transmission parameters associated with the recipient node has exceeded a threshold value;
in response to determining that the age value has exceeded the threshold value, selecting, by the sender node, a data packet in which to set a transmission parameter request;
setting, by the sender node, the transmission parameter request in the selected data packet;
communicating, by the sender node, the data packet comprising the transmission parameter request to the recipient node using a set of base transmission parameters;
receiving, by the sender node, a transmission parameter response from the recipient node, the response providing updated transmission parameters for the recipient node;
and
updating, by the sender node, the transmission parameters associated with the recipient node based on the updated transmission parameters in the transmission parameter response.

5 more elements

An apparatus, comprising:

one or more network interfaces to communicate with a low power and lossy network (LLN);
a processor coupled to the network interfaces 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:
prepare a data packet for transmission to a recipient node via a communication medium;
determine an age value for a set of current transmission parameters, the current transmission parameters stored on the sender node and associated with the recipient node;
determine if the age value has exceed a threshold value;
select, in response to determining that the age value has exceeded the threshold value, a data packet in which to set a transmission parameter request;
set the transmission parameter request in the selected data packet;
transmit the selected data packet comprising the transmission parameter request to the recipient node using a set of base transmission parameters, wherein the base transmission parameters comprise a lower data rate than the current transmission parameters;
receive a transmission parameter response from the recipient node, the transmission parameter response providing an updated set of transmission parameters for the recipient node;
and
update the current transmission parameters associated with the recipient node based on the updated transmission parameters in the transmission parameter response.

10 more elements

A tangible, non-transitory, computer-readable media having software encoded thereon, the software when executed by a processor operable to:

in a low power and lossy network comprising one or more interfaces and a plurality of nodes, prepare a data packet for transmission to a recipient node via a communication medium;
determine an age value for a set of current transmission parameters, the current transmission parameter stored on the sender node and associated with the recipient node;
determine if the age value has exceeded a threshold value;
select, in response to determining that the age value has exceeded the threshold value, a data packet in which to set a transmission parameter request, the data packet marked for transmission to the recipient node;
set the transmission parameter request in the selected data packet;
transmit the data packet comprising the transmission parameter request to the recipient node using a set of base transmission parameters, wherein the base transmission parameters comprise a lower data rate than the current transmission parameters;
receive a transmission parameter response from the recipient node, the transmission parameter response providing an updated set of transmission parameters for the recipient node;
and
update the current transmission parameters associated with the recipient node based on the updated set of transmission parameters received in the transmission parameter response.

6 more elements

Dependencies are inferred from the claim text.