- High Speed Data over Wireless Systems
Led by Prof. Yiqiang Q. Zhao.
We are aiming at significantly reducing the severe impact, on the
performance of end-to-end TCP error and congestion control schemes, of the
inefficient cross-layer interactions caused by events occurring at the RLC
layer of the UMTS system. These events include packet losses due to
transmission error and increased packet transmission delay caused by RLC
layer error control. As the TCP/IP protocol suite was originally designed
for reliable wireline networks, some fundamental assumptions made on the
protocols are implied not true for a wireless data network. The situation
is getting worse with the new trend of multimedia communications where
strict QoS is required. We plan to determine both TCP layer and RLC layer
parameter settings to optimize the overall performance.