Mobile ad hoc network (MANET) providing quality-of-service (QoS) based unicast and multicast features
View Patent ↗A mobile ad hoc network (MANET) may include a plurality of mobile nodes each including a wireless communications device and a controller connected thereto. The controller may operate in accordance with a multi-layer protocol hierarchy. More particularly, at an upper protocol layer, the controller may establish a quality-of-service (QoS) threshold. Furthermore, at least one intermediate protocol layer below the upper protocol layer, the controller may select between unicast and multicast communications modes based upon the QoS threshold. As such, at a lower protocol layer below the at least one intermediate protocol layer, the controller may cooperate with the wireless communications device to transmit data to at least one destination mobile node based upon the selected communications mode.
1. A mobile ad hoc network (MANET) comprising:
a plurality of mobile nodes each comprising a wireless communications device providing a selectable signal transmission pattern and a controller connected thereto;
said controller operating in accordance with a multi-layer protocol hierarchy for,
at an upper protocol layer, establishing a quality-of-service (QoS) threshold,
at at least one intermediate protocol layer below the upper protocol layer, selecting between a unicast communications mode and a multicast communications mode based upon the QoS threshold, and
at a lower protocol layer below the at least one intermediate protocol layer, cooperating with said wireless communications device to transmit data to at least one destination mobile node based upon the selected communications mode and determine a QoS metric for the at least one selected route;
said controller also operating in accordance with the multi-layer protocol hierarchy for,
at the at least one intermediate protocol layer, determining whether the QoS metric falls below the QoS threshold, and
at the lower protocol layer, modulating the data using a first modulation technique if the QoS metric is greater than or equal to the QoS threshold, and otherwise using a second modulation technique.
2. The MANET of claim 1 further comprising:
at the at least one intermediate protocol layer, selecting at least one route to the at least one destination mobile node based upon the QoS threshold; and
at the lower protocol layer, cooperating with said wireless communications device to transmit the data to the at least one destination mobile node via the at least one selected route.
3. The MANET of claim 1 wherein, at the at least one intermediate protocol layer, said controller determines whether to require data reception acknowledgements based upon the QoS threshold.
4. The MANET of claim 1 wherein, at the lower protocol layer, said controller cooperates with said wireless communications device to change at least one signal characteristic based upon a determination that the QoS metric has fallen below the QoS threshold.
5. The MANET of claim 4 wherein the at least one signal characteristic comprises at least one of power, gain, and signal pattern.
6. The MANET of claim 1 wherein, at the at least one intermediate protocol layer, said controller encodes data prior to transmission; and wherein said controller also changes the encoding based upon a determination that the QoS metric has fallen below the QoS threshold.
7. The MANET of claim 1 wherein, at the lower protocol layer, said controller cooperates with said wireless communications device to transmit data at a data rate; and wherein said controller also cooperates with said wireless communications device to change the data rate based upon a determination that the QoS metric has fallen below the QoS threshold.
8. The MANET of claim 1 wherein the upper protocol layer comprises an application layer.
9. The MANET of claim 1 wherein the at least one intermediate protocol layer comprises at least one of a session layer, a transport layer, a network layer, and a radio transport layer.
10. The MANET of claim 1 wherein the lower protocol layer comprises a physical layer.
11. The MANET of claim 1 wherein the QoS threshold is based upon at least one of available bandwidth, error rate, end-to-end delay, end-to-end delay variation, hop count, expected path durability, and priority.
12. A mobile ad hoc network (MANET) comprising:
a plurality of mobile nodes each comprising a wireless communications device providing a selectable signal transmission pattern and a controller connected thereto;
said controller operating in accordance with a multi-layer protocol hierarchy for,
at an upper protocol layer, establishing a quality-of-service (QoS) threshold,
at least one intermediate protocol layer below the upper protocol layer,
selecting at least one route to at least one destination mobile node based upon the QoS threshold,
determining whether a QoS metric for the selected route falls below the QoS threshold, and
selecting between a unicast communications mode and a multicast communications mode based upon the QoS threshold, and
at a lower protocol layer below the at least one intermediate protocol layer, cooperating with said wireless communications device to
determine the QoS metric for the at least one selected route,
transmit data to the at least one destination mobile node via the at least one selected route based upon the selected communications mode,
change at least one signal characteristic based upon a determination that the QoS metric has fallen below the QoS threshold, and
modulate the data using a first modulation technique if the QoS metric is greater than or equal to the QoS threshold, and otherwise use a second modulation technique.
13. The MANET of claim 12 wherein, at the at least one intermediate protocol layer, said controller determines whether to require data reception acknowledgements based upon the QoS threshold.
14. The MANET of claim 12 wherein the at least one signal characteristic comprises at least one of power, gain, and signal pattern.
15. The MANET of claim 12 wherein, at the at least one intermediate protocol layer, said controller encodes data prior to transmission; and wherein said controller also changes the encoding based upon a determination that the QoS metric has fallen below the QoS threshold.
16. The MANET of claim 12 wherein, at the lower protocol layer, said controller cooperates with said wireless communications device to transmit data at a data rate; and wherein said controller also cooperates with said wireless communications device to change the data rate based upon a determination that the QoS metric has fallen below the QoS threshold.
17. The MANET of claim 12 wherein the upper protocol layer comprises an application layer.
18. The MANET of claim 12 wherein the at least one intermediate protocol layer comprises at least one of a session layer, a transport layer, a network layer, and a radio transport layer.
19. The MANET of claim 12 wherein the lower protocol layer comprises a physical layer.
20. The MANET of claim 12 wherein the QoS threshold is based upon at least one of available bandwidth, error rate, end-to-end delay, end-to-end delay variation, hop count, expected path durability, and priority.
21. A method for operating a mobile node in a mobile ad hoc network (MANET), comprising a plurality of mobile nodes, in accordance with a multi-layer protocol hierarchy, the mobile node comprising a wireless communications device providing a selectable signal transmission pattern, and the method comprising:
at an upper protocol layer, establishing a quality-of-service (QoS) threshold;
at least one intermediate protocol layer below the upper protocol layer, selecting between a unicast communications mode and a multicast communications mode based upon the QoS threshold;
at a lower protocol layer below the at least one intermediate protocol layer, causing the wireless communications device to transmit data to at least one destination mobile node based upon the selected communications mode, and determining a QoS metric for the at least one selected route;
at the at least one intermediate protocol layer, determining whether the QoS metric falls below the QoS threshold; and
at the lower protocol layer, modulating the data using a first modulation technique if the QoS metric is greater than or equal to the QoS threshold, and otherwise using a second modulation technique.
22. The method of claim 21 further comprising:
at the at least one intermediate protocol layer, selecting at least one route to the at least one destination mobile node based upon the QoS threshold; and
at the lower protocol layer, causing wireless communications device to transmit the data to the at least one destination mobile node via the at least one selected route.
23. The method of claim 21 further comprising, at the at least one intermediate protocol layer, determining whether to require data reception acknowledgements based upon the QoS threshold.
24. The method of claim 21 further comprising, at the lower protocol layer, causing the wireless communications device to adjust at least one signal characteristic based upon a determination that the QoS metric has fallen below the QoS threshold.
25. The method of claim 24 wherein the at least one signal characteristic comprises at least one of power, gain, and signal pattern.
26. The method of claim 21 further comprising, at the at least one intermediate protocol layer:
encoding data prior to transmission; and
changing the encoding based upon a determination that the QoS metric has fallen below the QoS threshold.
27. The method of claim 21 further comprising, at the lower protocol layer:
causing the wireless communications device to transmit data at a data rate; and
causing the wireless communications device to change the data rate based upon a determination that the QoS metric has fallen below the QoS threshold.