Method for communicating channel operation information within a wireless communication system
View Patent ↗A node in a wireless communication system detects a requirement to discontinue communications on a primary channel. In response, the node sends a message to a plurality of nodes, which includes a reason for discontinuation of communications on the primary channel and availability of immediate operation of a secondary channel. The secondary channel is a channel the node was currently using for its communication. Another node receives a message including a requirement to discontinue communications on a primary channel and also the availability of immediate operation on a secondary channel. The receiving node detects the feasibility of moving the operation of its associated network to the secondary channel. When feasible, the node sends a message to other nodes to make the secondary channel its primary channel.
1. A method for communicating channel operation information within a wireless communication system, the method comprising: operating a node in a first mode on a first channel and one or more secondary channels; detecting a requirement to discontinue communications on the first channel by the node; transmitting by the node, in response to the requirement, a message to a plurality of other nodes, the message including at least a reason for discontinuation of communications on the first channel and availability of immediate operation of the node in a second mode on the one or more secondary channels, wherein each secondary channel comprises a channel the node was currently using for communication;
wherein the first channel comprises a primary channel used for sending a request from the node to its portal to make one of the secondary channels a primary channel for future operation, the node comprises a mesh point and the portal comprise a mesh point root, and forwarding the sending request from the mesh point across multiple hops until the request is received by the mesh point root; and
wherein sending the request comprises one of multicasting and broadcasting the request from the mesh point to all associated nodes which have a direct radio link with the mesh point, and forwarding the request by one of multicasting or broadcasting the request by the associated nodes across multiple hops until the request is received by the mesh point root.
2. A method as claimed in claim 1 , wherein the first channel comprises one of a primary channel and a secondary channel.
3. A method as claimed in claim 1 , further comprising prior to the transmitting step:
identifying the one or more secondary channels by the node by scanning a list of available channels.
4. A method as claimed in claim 1 , wherein the detection of the requirement to discontinue communications on the first channel comprises one or more of a detection of a radar signal on the first channel, a detection of congestion on the first channel, a detection of a need for a periodic scan at the node.
5. A method as claimed in claim 1 , further comprising:
receiving the message by at least one of the plurality of other nodes;
determining a feasibility of moving operation of its associated network to one of the secondary channels based on information it maintains and information received in the message; and
when feasible, sending a message by the at least one other node to one or more nodes in the associated network to make one of the secondary channels its primary channel after a given period of time.
6. A method as claimed in claim 1 , further comprising:
completing a Channel Availability Check (CAC) process for each of the secondary channels by the node prior to the detection of the requirement to discontinue communications on the primary channel.
7. A method as claimed in claim 1 , further comprising:
operating the node in the second mode on one of the secondary channels; and
initiating a Channel Availability Check (CAC) process on an adjacent channel.
8. A method as claimed in claim 7 , further comprising:
switching operation of the node to the first mode when the adjacent channel is free of interfering signals for a CAC duration.
9. A method as claimed in claim 8 , wherein the interfering signals comprises one or more radar signals.
10. A method as claimed in claim 9 , further comprising:
switching operation of a primary channel of the node during the period of time.
11. A method as claimed in claim 1 , wherein the first channel comprises a secondary channel, the method further comprising:
disabling the secondary channel for a period of time.
12. A method as claimed in claim 11 , wherein the interfering signals comprises one or more radar signals, and wherein disabling the secondary occurs within a CHANNEL MOVE TIME.
13. A method as claimed in claim 11 , wherein the period of time comprises a non-occupancy period.
14. A method as claimed in claim 1 , wherein the request to switch channels comprises one or more of a reason for discontinuation of communications on the primary channel, a duration of a channel switch operation, an information about an originator device type, and a list of secondary channels.
15. A method as claimed in claim 1 , further comprising:
receiving an affirmative response by the node from the portal to switch from the primary channel to a secondary channel; and switching the primary channel of operation of the node to a secondary channel at a designated time.
16. A method as claimed in claim 15 , wherein the affirmative response further comprises an identification of the secondary channel for switching operation.
17. A method as claimed in claim 15 , further comprising:
receiving an identification of the secondary channel for switching operation from a central authority within the wireless communication system.