ALMA: The Agile Loss Management Approach in Wireless Networks

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N00014-08-M-0304
Agency Tracking Number: N08A-032-0061
Amount: $69,938.00
Phase: Phase I
Program: STTR
Awards Year: 2008
Solicitation Year: 2008
Solicitation Topic Code: N08-T032
Solicitation Number: 2008.A
Small Business Information
33 Thornwood Drive, Suite 500, Ithaca, NY, 14850
DUNS: 101321479
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Daniel Tingstrom
 Technical Director
 (607) 257-1975
Business Contact
 Richard Smith
Title: Controller
Phone: (607) 257-1975
Research Institution
 Diane West
 Office of Sponsored Programs
373 Pine Tree Rd
Ithaca, NY, 14853
 (607) 255-0655
 Nonprofit college or university
Tactical military wireless networks present unique challenges. They must provide the capabilities of commercially available wireless networks—under radically different conditions. Nodes are very mobile and network topologies change often. Military networks cannot use commercially available frequencies, which have line-of-sight limitations and are easily detected and jammed. Software defined radios (SDRs) provide new capabilities in which the physical layer can be controlled by software, and the underlying radio characteristics (waveforms) can be easily reconfigured by a software change. The programming of SDR networks, however, often ties higher layer performance to the physical layer characteristics. And inefficient use of the network results in suboptimal performance for both data packets, which require reliable transmission, and voice packets, which require timely transmission. The ALMA protocol will decouple the physical layer from the higher layers, and increase reliability by using redundant transmission paths. These paths occur in any combination of three ways: retransmission, simultaneous transmissions to multiple nodes (which split into multiple paths that converge on the destination), and multiple radio channels. We will demonstrate the feasibility of ALMA by creating the protocol and simulating its performance.

* Information listed above is at the time of submission. *

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