Abstract
Energy conservation is very important to mobile devices in high-speed packet data networks, such as WLAN and 3GPP packet-switching networks. Both RObust Header Compression (ROHC) and WLAN Paging are helpful for energy saving. This thesis presents the design and implementation of the two schemes in the 3GPP/WLAN integrated networks. ROHC is designed for bandwidth saving originally by reducing packet header size. Because the header size is reduced, the transmission time could be shorten. Thus, energy could be conserved. Therefore, header compression is useful for energy saving. On the other hand, location management for mobile devices is usually hard to achieve in WLANs because of lacking a well-designed core network. Because 3GPP has proposed an architecture for the 3GPP/WLAN integrated networks, WLAN paging and location management could be done by the newly introduced components in the 3GPP core network. With the WLAN paging proposed in this thesis, mobile devices could sleep no matter they connect to 3GPP or WLAN system. Energy, thus, is conserved.