Area optimized architecture and VLSI implementation of a multi-coder processor for the WTLS

Abstract

The rapidly growth of the transmitted data amount, over wireless networks, has triggered special needs for compression, in an attempt for real-time communications. Wireless Transport Layer Security (WTLS) is the security layer for both Wireless Application Protocol and Open Mobile Alliance. In spite of the fact that a great number of ciphers have been specified in WTLS, the compression unit is optional Compression in wireless portable devices is a sensitive issue due to the restricted resources environment. The composite compression encoders allocate area that system can not support. In this paper, an area-optimized multi-coder processor is proposed for the WTLS. The proposed system consists of three units and serves three different types of compression: speech (ADPCM), text (Huffman) and image (RLE). The proposed processor minimizes the area resources compared with other published works and has competitive performance.