Regulation of transmission power control in mitigate self interference by optimizing link transmission parameters in a wireless network
View Patent ↗A method of optimizing link transmission parameters between access nodes within a mesh network is disclosed. The method includes each access node within the mesh transmitting packets at N different combinations of data rates and power levels. Each receiving node that receives the data packets at one or more of the N combinations, selects a most desirable one of the received combinations. The receiving nodes indicate to the transmitting nodes the selected most desired combination for transmitting to the receiving node.
1. A method of regulating transmission power of access nodes within a wireless mesh network, the mesh network comprising at least one gateway access node, and a plurality of access nodes, the method comprising:
each access node identifying packets for transmission as either data packets or as routing packets;
each access node transmitting the routing packets periodically;
downstream access nodes selecting a routing path to at least one gateway based upon a quality of received routing packets;
each access node setting the transmission power of transmit signals from the device to be lower for routing packets than for data packets; wherein setting the transmission signal power lower for routing packets than for data packets comprises:
determining a minimum power level required to sustain a desired transmission rate for the routing packets, wherein the minimum power level is determined by measuring SNR at a receiver of the routing packets, and determining the minimum power level by comparing the measured SNR with an SNR required to maintain the desired transmission rate;
adjusting the transmission power level based on the minimum power level and a spacing density of the plurality of access nodes of the mesh network.
2. The method of claim 1 , wherein routing packets are originated at the at least one gateway, and are modified and rebroadcast by receiving access nodes.
3. The method of claim 2 , wherein the quality of received routing packets is determined by a persistence of the received routing packets.
4. The method of claim 3 , wherein the persistence is determined by comparing a number of received routing packets per unit of time to a predetermined number of routing packets transmitted per unit of time.
5. The method of claim 1 , further comprising the device initially having a default transmission power level.
6. The method of claim 5 , wherein setting the transmission power to a lower transmission power level comprises attenuating the default transmission power level by a predetermined incremental amount.
7. The method of claim 1 , wherein setting the transmission power to a lower transmission power level comprises:
determining a minimum power level required to sustain a desired transmission data rate;
adjusting the transmission power level to the minimum power level.