Networking

Our department is especially strong in networking research that covers a broad scope from software used to control network activities to hardware for transporting data over wired and wireless channels. Our department launched the Area-of-Excellence in Information Technology (AoE-IT) with the Hong Kong University of Science and Technology (HKUST), and the Hong Kong University (HKU). As part of its mission to explore new network research frontiers, the AoE-IT is building a Gigabit Internet Testbed initially interconnecting CUHK, HKUST, and HKU, which will eventually link to other universities, local and international, as well as the public at large.

Research Projects

1. Scalable Switch Designs for Future-Generation Internet Routers

The traffic on the Internet is experiencing an explosive, exponential growth. In addition, the types of traffic are becoming more and more heterogeneous, from non-real time file transfer to real-time multimedia content delivery. The department has a core group of experts in packet switch designs, and they are putting their efforts in behind several initiatives to design future generation switches that will meet these challenges.

2. The Joint Congestion Control (JCC) for TCP/IP Networks

JCC unifies the efforts of end hosts and network routers to provide proactive congestion control. Probe packets are used to collect the congestion information from the links, and the source uses this information to control the transmission rate. Simulation results show that JCC outperforms TCP Reno in terms of throughput stability, packet loss rate and fairness.

3. S-WTP: Shifted Waiting Time Priority Scheduling for Delay Differentiated Services

The Delay Differentiated Service was proposed as a DiffServ model to provide quality of service (QoS) on the Internet. In DiffServ, the scheduler arranges packet transmission order according to some specific delay metric. In this paper, we propose a modified algorithm based on Waiting Time Priority (WTP) called Shifted Waiting Time Priority (S-WTP). SWTP can reduce the computational complexity of WTP from O(n) to O(log(n)).





	Research
	Research Research AreasNetworking Networking Our department is especially strong in networking research that covers a broad scope from software used to control network activities to hardware for transporting data over wired and wireless channels. Our department launched the Area-of-Excellence in Information Technology (AoE-IT) with the Hong Kong University of Science and Technology (HKUST), and the Hong Kong University (HKU). As part of its mission to explore new network research frontiers, the AoE-IT is building a Gigabit Internet Testbed initially interconnecting CUHK, HKUST, and HKU, which will eventually link to other universities, local and international, as well as the public at large. Research Projects 1. Scalable Switch Designs for Future-Generation Internet Routers The traffic on the Internet is experiencing an explosive, exponential growth. In addition, the types of traffic are becoming more and more heterogeneous, from non-real time file transfer to real-time multimedia content delivery. The department has a core group of experts in packet switch designs, and they are putting their efforts in behind several initiatives to design future generation switches that will meet these challenges. 2. The Joint Congestion Control (JCC) for TCP/IP Networks JCC unifies the efforts of end hosts and network routers to provide proactive congestion control. Probe packets are used to collect the congestion information from the links, and the source uses this information to control the transmission rate. Simulation results show that JCC outperforms TCP Reno in terms of throughput stability, packet loss rate and fairness. 3. S-WTP: Shifted Waiting Time Priority Scheduling for Delay Differentiated Services The Delay Differentiated Service was proposed as a DiffServ model to provide quality of service (QoS) on the Internet. In DiffServ, the scheduler arranges packet transmission order according to some specific delay metric. In this paper, we propose a modified algorithm based on Waiting Time Priority (WTP) called Shifted Waiting Time Priority (S-WTP). SWTP can reduce the computational complexity of WTP from O(n) to O(log(n)).