Voice And Data Multiplexers Algorithm Research

How to increase the bandwidth utilization in communication link, especially in low rate condition, is always a very important issue. Now we can transmit data, voice, and fax in communication lines whose bandwidths from 9.6kb/s to 256kb/s through the voice/data multiplexing system. This method is good for improving bandwidth utilization and used widely in telecommunication,, finance and military.In this paper, we mainly focus on the software design of multiplexor, the design and simulation of packet scheduling algorithm and the implement of synchronic communication chip. We divide traffic into two kinds: real-time and non-real-time, and present a new packet scheduling algorithm. The simulation results show that this algorithm not only provide different QoS (quality of service) guarantees for real-time traffic( voice ) and non-real-time traffic(data ), but also can assign bandwidth fairly in long term. We also present a simple communication. Using this protocol, multiplexors can establish communication link and control data traffic. In order to satisfy the special requirement of synchronic serial communication protocol between multiplexor and synchronic data terminal, we design the special communication chip with CPLD.In chapter one we introduce some multiplexing technology, in chapter two, we describe the key technology and system design. The introduction of the multiplexor communication protocol, including the link establishment, communication synchronic, and frame definition, will be described in chapter 3. In chapter 4 we also describe some details of the packet scheduling algorithm. Finally, we will introduce the hardware scheme of multiplexor.