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Channel allocation schemes

About: Channel allocation schemes is a research topic. Over the lifetime, 10656 publications have been published within this topic receiving 182117 citations.


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Journal ArticleDOI
TL;DR: A multi-path extension to the dual algorithm is developed, which takes into consideration path diversity when evaluating fairness, and is shown to be globally stable in the absence of propagation delays and a sufficient condition for local stability is found.
Abstract: This paper investigates fair, scalable, stable congestion controls which achieve high bandwidth utilization over networks operating multi-path routing. It aims to take advantage of path diversity to achieve efficient bandwidth allocation without causing instability. We develop a multi-path extension to the dual algorithm, which takes into consideration path diversity when evaluating fairness. This algorithm is shown to be globally stable in the absence of propagation delays and a sufficient condition for local stability, for the case when heterogeneous propagation delays are present, is found. The sufficient condition we present is decentralized in the following sense: the gain parameter for each dynamic variable is restricted by the average round-trip time of packets passing through the link or source it represents, but not by the round-trip times of any other packets. This leads to a highly scalable parameter choice scheme. Gain parameters are calculated from local information which is independent of the state of the algorithm, and our delay stability condition is satisfied. The models considered apply to networks consisting of arbitrary interconnections of sources and links with arbitrary heterogeneous propagation delays.

42 citations

Patent
07 Jun 2001
TL;DR: In this paper, a channel allocation tiering scheme is proposed to increase the spectral efficiency of the cellular networks. But the system does not consider interference diversity, interference suppression and/or interference avoidance.
Abstract: A cellular telecommunications method and system for fractional reuse of resources through channel allocation tiering, thereby increasing the spectral efficiency of the telecommunications system. A number of available channels (110) in a cell (15) are divided into logical groups (115, 125), each of which share the same radio resources (105). The system reduces or eliminates interference using a number of techniques, such as interference diversity, interference suppression and/or interference avoidance. This utilization of resources in the system will create a spectrally efficient network or cell (15) and enable a reuse less than one.

42 citations

Journal ArticleDOI
TL;DR: The results suggest that the GASC has lower overall blocking probability of new calls than the GALC; however, theGALC may do better than theGASC in a number of combinations of handoff requests and EMC restrictions.
Abstract: Two adaptive genetic algorithms (GAs), namely GA for locking channel (GALC) and GA for switching channel (GASC), are proposed for a dynamic channel assignment in mobile cellular communication systems. The algorithms aim to minimize the blocking probability of new calls and the dropping probability of handoff calls in channelized systems, simultaneously considering three types of electromagnetic compatibility (EMC) constraints: 1) the cochannel; 2) the adjacent channel; and 3) the cosite. The proposed algorithms add a number of mechanisms to the canonical GA in order to increase their efficiency and velocity of convergence. Such mechanisms are adaptive parameters, random immigrants, a greedy policy, a reservoir to assist the initial population, a truncation selection scheme, and a three-point crossover. The GASC allows call switching between channels during the call holding time, whereas the GALC does not allow it. Computer simulations evaluated the performance of the proposed models considering a benchmark cellular environment formed by 49 cells with 70 channels and nonuniform traffic load characteristics. The impact of EMC constraints on the blocking probability of new calls and on the dropping probability of handoff calls was assessed, and the proposed models reached suitable performance. Equipment failure tests showed robust performance of the two adaptive GA schemes during the fault occurrence and recovery capability after the fault ends. The results suggest that the GASC has lower overall blocking probability of new calls than the GALC; however, the GALC may do better than the GASC in a number of combinations of handoff requests and EMC restrictions.

42 citations

Journal ArticleDOI
TL;DR: A performance model developed for the deployment design of IEEE 802.11s Wireless Mesh Networks contains seven metrics to analyze the state of WMN, and novel mechanisms to use multiple evaluation criteria in WMN performance optimization.

42 citations

Journal ArticleDOI
01 Nov 2009-Optik
TL;DR: In this paper, a channel allocation method based on optical Golomb ruler (OGR) that allows reduction of the FWM effect while maintaining bandwidth efficiency along with the algorithms has been presented in a very high-capacity, long-haul optical communication systems can be designed by wavelength division multiplexing (WDM) of high-bit-rate channels and by using erbium-doped fiber amplifiers (EDFAs) to periodically compensate the fiber loss.

42 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202315
202259
2021181
2020268
2019293
2018292