85th AMS Annual Meeting

Thursday, 13 January 2005: 4:15 PM
Radar Networking: Considerations for Data transfer Protocols and Network Characteristics
Tarun Banka, Colorado State University, Fort Collins, CO; and A. Maroo, A. P. Jayasumana, V. Chandrasekar, N. Bharadwaj, and S. Chittibabu
Poster PDF (201.2 kB)
High bandwidth radar data networking has led to the development of enabling technologies for the transfer of radar data on the network. QoS requirement for real-time digitized radar data transfer is significantly different from other traditional applications such as video or voice transfer on the network. While it requires a high bandwidth in general, the client applications dictate the minimum and maximum transmission rate requirements. Many radar applications are delay sensitive and data loss can occur during the transmission due to network characteristics; therefore retransmission of data to recover from losses may not be useful for the application if data arrives after the critical requirement. Several of the radar applications are also tolerant to a certain type of data loss. Ubiquitous transport protocols on the Internet, like TCP and UDP, have limitations in meeting the unique QoS requirements of the digitized radar data transfer. With real-time operations, the time and extra buffering required makes common protocols such as TCP not efficient and suitable. However, a simple UDP-based implementation would send data at a constant rate, regardless of its effects on the neighboring traffic, creating network congestion, and resulting in a high loss rate for the radar application itself. A transport protocol for digitized radar data transfer TRABOL (TCP friendly Rate Adaptation Based On Loss) has been developed that meets the QoS requirements of digitized radar data transfer while remaining friendly to the TCP traffic on the network. This paper investigates the impact of different transport protocols and dynamics of network characteristics such as packet loss, delay jitter on the performance of digitized radar data networking. Performance results have been obtained using radar network emulation test bed; Test bed emulations are used to demonstrate the unique characteristics and suitability of real time protocols such as TRABOL for radar networking applications.

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