Traffic-aware routing in wireless networks
The routing of traffic in wireless networks is performed in accordance with a routing metric. The routing metric can reflect the effects of future self-traffic of a forthcoming communication flow. In a described implementation, a routing decision is made for a forthcoming communication flow that is to propagate over multiple nodes of a multi-hop wireless network. The routing decision is based on at least one predicted effect on the wireless network from self-traffic of the forthcoming communication flow.
1. A device that is capable of making a routing decision for a communication flow that is to propagate over multiple nodes of a multi-hop wireless network, the routing decision based on at least two predicted effects from self-traffic of the communication flow,
wherein one of the as least two predicted effects from self-traffic of the communication flow comprises a predicted bandwidth consumption from direct transmissions for the communication flow, and
wherein another of the at least two predicted effects from the self-traffic of the communication flow comprises predicted interference from the self-traffic of the communication flow, the predicted interference from the self-traffic being represented by:
a carrier sensing factor indicating a number of links in a path between a sender and a receiver that are on a same channel and that are in the sender's carrier sensing range; and
a hidden terminal factor indicating the number of links in a path between the sender and the receiver that are on the same channel and that are in the receiver's carrier sensing range, but that are not in the sender's carrier sensing range.
2. The device as recited in claim 1 wherein the predicted interference from the self-traffic of the communication flow arises from hidden terminal (HT)-type self-traffic.
3. The device as recited in claim 1 , wherein the predicted interference from the self-traffic of the communication flow arises from carrier sensing (CS)-type self-traffic.
4. The device as recited in claim 1 , wherein the communication flow comprises a real-time communication (RTC) flow having an expected predetermined bandwidth utilization level.
5. The device as recited in claim 1 , wherein the device comprises a wireless network node; the wireless network node comprising a wireless adapter, a wireless router, or a computer with wireless capabilities.
6. A device that is capable of making a routing decision for a communication flow that is to propagate over multiple nodes of a multi-hop wireless network, the routing decision based on:
(i) at least two predicted effects from-self-traffic of the communication flow, the at least two predicted effects comprising a predicted bandwidth consumption from direct transmissions for the communication flow and predicted interference resulting from the self-traffic of the communication flow,
wherein the predicted interference resulting from the self-traffic being represented by:
a carrier sensing factor indicating a number of links in a path between a sender and a receiver that are on a same channel and that are in the sender's carrier sensing range; and
a hidden terminal factor indicating the number of links in a path between the sender and the receiver that are on the same channel and that are in the receiver's carrier sensing range, but that are not in the sender's carrier sensing range;
(ii) at least one predicted effect from neighboring traffic interference; and
(iii) a quality prediction that predicts how self-traffic and neighboring traffic will interfere with forthcoming Real Time Communication flow after the Real Time Communication flow is injected into the network.