Proceedings ArticleDOI
Information capacity and power control in single-cell multiuser communications
Raymond Knopp,Pierre A. Humblet +1 more
- Vol. 1, pp 331-335
TLDR
By examining the bit error-rate with antipodal signalling, it is shown that an increase in capacity over a perfectly-power controlled (Gaussian) channel can be achieved, especially if the number of users is large, and the inherent diversity in multiuser communications over fading channels is shown.Abstract:
We consider a power control scheme for maximizing the information capacity of the uplink in single-cell multiuser communications with frequency-flat fading, under the assumption that the users attenuations are measured perfectly. Its main characteristics are that only one user transmits over the entire bandwidth at any particular time instant and that the users are allocated more power when their channels are good, and less when they are bad. Moreover, these features are independent of the statistics of the fading. Numerical results are presented for the case of single-path Rayleigh fading. We show that an increase in capacity over a perfectly-power controlled (Gaussian) channel can be achieved, especially if the number of users is large. By examining the bit error-rate with antipodal signalling, we show the inherent diversity in multiuser communications over fading channels.read more
Citations
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Proceedings ArticleDOI
QoS Oriented Time and Frequency Domain Packet Schedulers for The UTRAN Long Term Evolution
TL;DR: Orthogonal frequency division multiple access (OFDMA) downlink general packet scheduling methods for throughput fairness control among users are introduced and a principle of metric decoupling between time and frequency domain schedulers is introduced that is fundamental for maximizing throughput control.
Journal ArticleDOI
A Unified Approach to QoS-Guaranteed Scheduling for Channel-Adaptive Wireless Networks
TL;DR: In this paper, a unified framework for channel-aware QoS-guaranteed scheduling protocols for use in adaptive wireless networks is presented. But the work is limited to the case where multiple terminals are linked through orthogonal fading channels to an access point, and transmissions are adjusted to the intended channel.
Journal ArticleDOI
A Survey on Opportunistic Scheduling in Wireless Communications
Arash Asadi,Vincenzo Mancuso +1 more
TL;DR: A taxonomy for opportunistic schedulers is provided, which is based on scheduling design's objectives, to unveil two major issues: (i) the research in opportunistic is mature enough to jump from pure theory to implementation, and (ii) there are still under-explored and interesting research areas in opportunism scheduling.
Journal ArticleDOI
Coordinated load balancing, handoff/cell-site selection, and scheduling in multi-cell packet data systems
TL;DR: In this article, a scalable cross-layer framework is proposed to coordinate packet-level scheduling, call-level cell-site selection and handoff, and system-level coverage based on load, throughput, and channel measurements.
Proceedings ArticleDOI
Efficient resource management in OFDMA Femto cells
TL;DR: Comprehensive evaluations indicate that in addition to providing improved coverage indoors, with carefully designed resource management solutions that leverage spatial reuse, femto cells have a great potential to increase the system performance by two folds.
References
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Information Theory and Reliable Communication
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Information theoretic considerations for cellular mobile radio
TL;DR: Some information-theoretic considerations used to determine upper bounds on the information rates that can be reliably transmitted over a two-ray propagation path mobile radio channel model, operating in a time division multiplex access (TDMA) regime, under given decoding delay constraints are presented.
Journal ArticleDOI
Shannon-theoretic approach to a Gaussian cellular multiple-access channel
TL;DR: Shannon-theoretic limits for a very simple cellular multiple-access system, and a scheme which does not require joint decoding of all the users, and is, in many cases, close to optimal.
Journal ArticleDOI
Estimate of channel capacity in Rayleigh fading environment
TL;DR: In this article, the authors derived the channel capacity in a Rayleigh fading environment and showed that channel capacity is always lower than that in a Gaussian-noise environment and that diversity schemes can improve channel capacity.