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Energy Optimization Mechanism for Mobile Terminals using Vertical Handoff between WLAN and CDMA2000 Networks

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This paper presents energy optimization mechanism for mobile terminals (MTs) using vertical handoff between Wireless LAN (WLAN) and CDMA2000 networks. Several techniques for optimizing the power consumption of MTs have been considered in literature. Some of these techniques could be used separately or in tandem. Considering the importance of efficient energy management for MTs, the research in this area could be taken a step further.

The technique considered in this paper allows a multimode terminal to take advantage of two integrated networks to efficiently manage its energy consumption. Two integrated networks considered are WLAN and CDMA2000. This paper develops an algorithm that allows the MT to always get connected to the most cost-effective network. The results obtained showed that the MTs power is more efficiently managed when the MT is using the integrated networks than when it is using each of the networks independently.

Introduction:

In recent times, the use of Internet has allowed users ease of communication access at anywhere at any time. There are also emerging voice and data networks, each requiring mobile access devices. The need for users to take advantage of the various access networks without carrying about multiple terminals has lead to the development of multimode terminals. Most popular types of these multimode terminals presently are those that can access wireless LAN (WLAN) and CDMA2000 networks. Also, the users’ desire to be always best connected anytime, anywhere, with any device has fuelled the research on network integration. Network integration has been shown to have good prospects to both users and network providers alike.

The release of the IEEE 802.11 WLAN standards in 1997 gave rise to a number of other related standards which form the 802.11 family of standards. These standards were made to facilitate the interoperability of WLANs, and allow for the introduction of several new services. One of these services introduced is the public wireless access data networks more commonly known as “hot-spots”.

The great success and massive recent deployment of WLAN technology indicates that these networks will play an important role in the development of the 4G networks. To achieve the dream of universal mobile telecommunications as specified by the international telecommunications union (ITU), it is necessary to integrate WLAN and CDMA2000 cellular networks. The Internet certainly, will be used to support this integration because it has become the main thrust of network integration between complementary heterogeneous networks.

WLAN hot-spots and CDMA2000 cellular network are complementary wireless access technologies. Their integration could help to meet the end user’s demand for improved access to services using a “single multi-mode” devices that are mobile and portable with longer battery life. Recent trends indicate that WLAN based on IEEE 802.11 standards and third generation (3G) wireless wide area network such as CDMA2000 Cellular network will co-exist to offer easy Internet access to end users.
Authors: Nathaniel SALAWU | Elizabeth Nonye ONWUKA
Source: Leonardo Electronic Journal of Practices and Technologies

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