NDLI: Dynamic link asymmetry in 'bunched' wireless networks

Content Provider	IEEE Xplore Digital Library
Author	Lindstrom, M. Zander, J.
Copyright Year	1999
Description	Author affiliation: Dept. of Signals, Sensors & Syst., R. Inst. of Technol., Stockholm, Sweden (Lindstrom, M.)
Abstract	In most future wireless applications an increasing fraction of the total offered traffic is expected to appear in the downlink (fixed-to-mobile) segment of the system. This requirement matches rather poorly with the system design and spectrum allocation for current and future systems which employ symmetric frequency division duplex (FDD). In contrast, TDMA/TDD systems, at least in principle, allow for a more flexible resource allocation by moving the boundary between uplink and downlink time-slots, the switching point. The key problem caused by moving the switching point; is interference between mobiles and base stations. In the paper, some algorithms to select and adapt the switching point in a 'bunched' cellular environment are investigated. A simple scheme using a 'soft' switching point, is shown to provide a capacity, while not as high as a fully dynamic scheme, still considerably higher than the capacity of a traditional fixed switching point scheme. Further, the 'soft' scheme is also adaptive, in the sense that it tracks varying traffic asymmetry ratios.
Starting Page	352
Ending Page	356
File Size	355229
Page Count	5
File Format	PDF
ISBN	0780354354
ISSN	10903038
DOI	10.1109/VETECF.1999.797155
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-09-19
Publisher Place	The Netherlands
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Intelligent networks Wireless networks Downlink Time division multiple access Wireless sensor networks Radio spectrum management Interference Radio communication Laboratories Sensor systems and applications
Content Type	Text
Resource Type	Article

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