Capacity

VirtualWire is involved in research for understanding how to build high-capacity systems with large number of users as well as building interference-resistant and non-interfering wireless technologies which will result in increased wireless capacities.

A lot of wireless mesh solutions use multi-radio solutions. This is necessary because they are primarily based on WiFi technology which uses a CSMA based MAC. Wireless nodes based on CSMA MAC (which share bandwidth based on collision avoidance rules known as carrier sense multiple access with collision avoidance i.e. CSMA/CA) may literally prevent each other from using the shared wireless channel. Thus the wireless mesh solutions based on WiFi (IEEE 802.11) technology use multi-radio nodes to avoid data rate degradation after a few hops. Another solution (other than using multi-radio nodes) to this problem is in using a MAC designed for multi-hop networks which allows wireless capacity to be utilized more efficiently.

Thus to build wireless solutions for supporting higher capacities, the focus of our research is in designing efficient MAC layers as well as robust PHY layers. Other technology developments at VirtualWire includes cross-layer optimizations for making MAC (and other higher layers) and PHY work in co-ordination as well as interference-avoidance techniques.

For building high-capacity wireless solutions based on our technologies contact us at partnership@virtualwire.in