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Equation-Based TCP Window Adjustment

Equation-Based TCP Window Adjustment. Problem Packet corruption caused by wireless transmission Caching and retransmission at base station. Each node in ad hoc network doesn’t have enough resource. Link failure due to mobility Explicit notification — freeze TCP states until new route found.

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Equation-Based TCP Window Adjustment

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  1. Equation-Based TCP Window Adjustment • Problem • Packet corruption caused by wireless transmission • Caching and retransmission at base station. • Each node in ad hoc network doesn’t have enough resource. • Link failure due to mobility • Explicit notification — freeze TCP states until new route found. • Old states may not be appropriate for new route. • Design • Objective: fast estimation of congestion window size • Node i keeps its own congestion loss rate pi • TCP packet has an additional field, FP (Forwarding Probability). • FP is initially set to 1 , and multiplied by 1-piat each intermediate node i. • Receiver reports FP to the sender with ACK. • Congestion window is calculated from the path loss rate p = 1-FP: • Results 1 • Results 2 Project team: Min Sik Kim, Eunjin Jung URL: http://www.cs.utexas.edu/users/minskim/mobile/

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