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Effects of feedback delay on the performance of the transfer-controlled procedure in controlling CCS network overloads

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1 Author(s)
Smith, D.E. ; Bellcore, Red Bank, NJ, USA

This paper studies the performance of the common channel signaling link congestion control procedure in the presence of network latency (the delay between the onset of congestion and the reaction of traffic sources to congestion information). The context of the study is a focused overload on a signaling point. The results show that the procedure tends to synchronize the intervals of time when traffic sources may or may not transmit and it tends to overcontrol traffic. Consequently, call (not just message) throughput suffers. The paper proposes and analyzes several partial remedies that are easy to implement. In particular, it recommends altering timer values and queue congestion thresholds and finds that the call throughput improves dramatically

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Selected Areas in Communications, IEEE Journal on  (Volume:12 ,  Issue: 3 )