WINDOW FLOW CONTROL LIDS S D ACK ACK ACK Similar to window based arQ End-to-end window for each session Wsd Each packet is acK'd by receiver Total number of un-ACK's packets < Wsd Window size is an upper-bound on the total number of packets and ACKs in the network Limit on the amount of buffering needed inside network Laboratory for Information and Decision SystemsWINDOW FLOW CONTROL QuickTime™ and a GIF decompressor are needed to see this picture. QuickTime™ and a Photo - JPEG decompressor are needed to see this picture. LIDS S D packet packet packet packet ACK ACK ACK • Similar to Window based ARQ – End-to-end window for each session, Wsd – Each packet is ACK’d by receiver – Total number of un-ACK’s packets < = Wsd ⇒ Window size is an upper-bound on the total number of packets and ACKs in the network ⇒ Limit on the amount of buffering needed inside network Eytan Modiano Slide 8 Lab oratory for Information and Decision Systems