Dong Joon Choi

A low overhead TEK rekeying scheme for IPTV CAS over DOCSIS 3.0

A novel scheme is presented for traffic encryption key (TEK) rekeying with low communication overhead for an Internet television (IPTV) conditional access system over Data-Over-Cable Service Interface Specifications (DOCSIS) 3.0. The proposed scheme utilizes the DOCSIS system synchronization for periodic TEK rekeying instead of a conventional TEK rekeying negotiation process. Analysis shows that the communication overhead is only 0.012 Kbps when TEK rekeying frequency is 1 second.

Dynamic load balancing algorithm for upstream bandwidth allocation in DOCSIS 3.0

A novel dynamic load balancing algorithm is presented for distributing upstream channel bandwidth allocations across bonded channels in DOCSIS3.0. By utilizing the well-known binary search mechanism in the proposed algorithm, it is possible to quickly find and maintain a balanced state. The simulation results show that only 10 to 20 repeated operations of the proposed algorithm are required to reach a balanced state regardless of the initial unbalanced state of the bonded upstream channels.