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Case Number 102035 - Novel MAC Layer Protocol for Space Division Multiple Accesss in Wireless Ad Hoc Networks

Description:  Mobile wireless ad hoc networks (MANETs) offer communication capabilities across the nodes of the network without extensive construction of an underlying infrastructure. Networks of this type can be set up easily and offer the ability to transfer voice, data, and video messages without the constraints on mobility imposed by traditional networks dependent upon wired connections. Larger networks are multi-hop in nature since a message must be transmitted across several nodes in order to reach its final destination. Currently, these networks suffer from very low overall throughput due to transmission bottlenecks that occur when one central node receives multiple signals from outward lying nodes. Unable to process these multiple signals simultaneously, transmission rates become bogged down diminishing the network?s efficiency and utility.
Simultaneous transmission (or reception) by a node requires smart antennas equipped with spatial multiplexing and demultiplexing capability. Although the use of smart directional antennas in an ad hoc network would remedy the problem of low throughput, there is no existing method for integrating them into this type of network.
UC has invented a method that allows a large number of nodes that transmit asynchronously, to organize their receptions and transmissions, so that the overall network throughput increases. Using the medium access control (MAC) layer of the networking protocol stack, nodes of the ad-hoc network coordinate to harness the improved processing power of smart directional antennas. Thus, this approach takes a necessary step for smart-antenna technology to actually achieve improved results in a network of nodes.

  1. This invention serves the function of integrating smart directional antenna technology into an ad hoc network. In this manner, the potential of these hardware improvements can finally be realized.
  2. Maximum data transfer is possible by carefully coordinating transmission of spatially separated messages. Therefore, the overall speed of applications using wireless LANs can be greatly enhanced.

    For more information please contact Geoffrey Pinski at 513-558-5696 or

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