Abstract
A combination of diverse but complementary wireless access technologies will improve wireless transmission performance and provide mobile users with ubiquitous connectivity. Vertical handoff is the basic requirement for the integration of heterogeneous wireless networks. During the vertical handoff procedure, handoff decision is a crucial issue for an efficient mobility. In this paper, we obtain the mathematical expressions of handoff conditions in traditional hysteresis based and dwelling-timer based handoff algorithms, and analyze their performance. Based on this, we propose a novel vertical handoff decision algorithm, which adaptively adjusts the handoff condition by analyzing the movement trend of mobile hosts and efficiently improves handoff performance. What's more, the related computing requirement is very simple to be suitable for mobile devices with limited computing capacity. Simulations show that it can achieve a better integrative handoff performance compared with conventional hysteresis based and dwelling-timer based handoff algorithms.
| Translated title of the contribution | Movement trend based self-adaptive vertical handoff algorithm and its performance evaluation |
|---|---|
| Original language | Chinese |
| Pages (from-to) | 112-119 |
| Number of pages | 8 |
| Journal | Jisuanji Xuebao/Chinese Journal of Computers |
| Volume | 31 |
| Issue number | 1 |
| Publication status | Published - Jan 2008 |
| Externally published | Yes |
Keywords
- Heterogeneous wireless networks
- Horizontal handoff
- Vertical handoff
- Wireless local area networks
- Wireless wide area networks