This GREEN Study investigates protocol enhancements which can potentially reduce power consumption@ extend battery life@ and better match the available power in both network and terminal equipment. The subject of this work is a Technical Report (TR) regarding energy efficient technology solutions affecting cdma2000?1 wireless telecommunication systems. Several specific items to be elaborated in this study are included in 3GPP2 Vision document. The work is not to be limited to those items alone. 1 cdma2000? is the trademark for the technical nomenclature for certain specifications and standards of the Organizational Partners (OPs) of 3GPP2. Geographically (and as of the date of publication)@ cdma2000? is a registered trademark of the Telecommunications Industry Association (TIA-USA) in the United States.