Wireless LAN White Papers
Multichannel Random Access in Multicell OFDMA Wireless Networks
Overview OFDMA systems are considered promising candidates for implementing next generation wireless communication systems. They provide multiple channels that can be accessed via random access schemes. However, traditional random access schemes could result in an excessive amount of access delay. To address this issue, the authors develop a fast retrial scheme that is based on slotted Aloha and exploits the structure of OFDMA. A salient feature of this scheme is that when collisions occur instead of retrials occurring randomly in time they occur randomly in frequency, i.e., the scheme randomly selects the subchannels for retrial. The paper also considers the issue of designing for an appropriate reuse factor for random access channels in order to overcome the intercell interference problem in OFDMA multicell environments.
| Publisher | University of Michigan | File Format | |
|---|---|---|---|
| Date Published | April 2005 | ||
| Format | White Papers | ||
| Topics | |||
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