Reducing delays in wireless networks
In this blog, I am going to discuss about Reducing delays in wireless networks. MIT researchers have designed a congestion-control scheme for wireless networks that could help reduce lag times and increase quality in video streaming, video chat, mobile gaming, and other web services.The researchers have called their new scheme “Accel-Brake Control” (ABC) and say that it achieves about 50% higher throughput and about half the network delays.
The scheme works with a novel algorithm. This algorithm allows routers to communicate how many data packets should flow through a network to avoid congestion while fully utilizing the network.
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If it receives an accelerate command, it means the packet made good time and the network has spare capacity. The sender then sends two packets: one to replace the packet that was received and another to utilize the spare capacity. When told to brake, the sender decreases its in-flight packets by one — meaning it doesn’t replace the packet that was received.
The scheme relies on a novel algorithm that enables the routers to explicitly communicate how many data packets should flow through a network to avoid congestion but fully utilize the network. It provides that detailed information from bottlenecks — such as packets queued between cell towers and senders — by repurposing a single bit already available in internet packets. The researchers are already in talks with mobile network operators to test the scheme.Reducing delays in wireless networks.
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“You’d think one bit wouldn’t carry enough information,” Alizadeh explained. “But, by aggregating single-bit feedback across a stream of packets, we can get the same effect as that of a multibit signal.”
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