An Alpha Cut (α-cut) Filter-Based Proxy Caching Control for Wireless Coverage Streaming Services

Abstract

Unfair media object processing in the proxy cache leads to traffic overload at the local buffer, increases delay and energy power, and requires retransmission. To fully support high quality media streaming service in IEEE 802.11-based wireless multimedia applications, this paper proposes a novel alpha cut (?-cut) filter-based proxy caching (AFPC) mechanism for wireless coverage streaming services. The AFPC consists of burst referenced caching strategy (BRCS) and capacity referenced caching strategy (CRCS) to acquire the optimal streaming quality for continuous objects and non-continuous objects. The BRCS controls the streaming congestion, by considering the encoding rate and channel bandwidth; the CRCS scheme reduces the caching congestion by scheduling different types of stream packets, based on the restricted caching resource, and media characteristics. Then, the AFPC mechanism monitors the traffic flow to guarantee an exact and fast streaming service during buffer caching. We perform a simulation to prove the efficiency of the proposed mechanism, and our simulation results show that the proposed AFPC mechanism has better performance than the S-caching, I-caching, and C-caching mechanisms.