Data link control scheme for wireless ATM transmission

The asynchronous transfer mode (ATM) employs header error control in order to protect cell integrity. However, wireless ATM (wATM) systems require more powerful error control techniques to offer acceptable cell loss ratio (CLR) and mobile QoS (quality of service). This paper describes the data link control (DLC) scheme, used in the wireless ATM segment, in order to provide reliable connection services. It analyzes the extension of the standard ATM protocol stack by a DLC layer and medium access control (MAC) sublayer. The DLC scheme uses the TDMA MAC system based on the ARQ (automatic repeat request) control scheme. The throughput of the system and a comparison of the ARQ based approach and the approach based on FEC and interleaving has been performed.