roduction of dis- continuous transmission mode (DTX) and discontinuous reception mode (DRX). Devices using DTX can turn off transmit chain when no data is sent. DTX conserves battery power, reduces interference and increases capacity. With DRX devices, the receive chain can be turned off during known idle slots which helps to conserve battery life. Backward Compatibility: Rev. B backward compatibility with both Rev. 0 and Rev. A is of utmost importance. Rev. B devices will seamlessly roam onto Rev. A and Release 0 networks. Similarly, Release 0 and Rev. A devices will continue to be supported on Rev. B networks [9]. Improved Transmit Efficiency (Uplink): Rev. A supports transmission target4 of 4, 8, 12, or 16 slots. The longer termination targets are used for delay-tolerant traffic, and the shorter termination targets are used for delay-sensitive traffic. Delay-tolerant traffic typically uses a 16-slot termination target called the high capacity (or HiCap) mode, while the delay- sensitive traffic typically uses an eight-slot termination target called the low latency (or LoLat) mode [10]. A Rev. B terminal using multiple carriers can achieve same or higher data rates by using higher transmission targets than single carrier systems. For example, a single- carrier terminal can achieve 1.8 Mbps by transmitting a 12,288-bit physical layer payload with a termination target of four slots. Rev. B terminal, on the other hand, can achieve higher than 1.8 Mbps while transmitting a 12,288-bit payload on three carriers at a transmission target of 16 slots. Symmetric and Asymmetric Mode of Operation: Multicarrier EV-DO supports three modes of operation namely Symmetric multicarrier mode, Basic asymmetric multicarrier mode, Enhanced asymmetric multicarrier mode. In symmetric multicarrier mode, the number of forward CDMA channels is equal to the number of reverse CDMA channels. The symmetric mode of operation can be used for applications with symmetric data rate requirements on the downlink and uplink. The symmetric multicarrier