Journal ArticleDOI
A pilot-based dynamic channel assignment scheme for wireless access TDMA/FDMA systems
TLDR
A control architecture for implementing a dynamic channel assignment (DCA) algorithm which optimizes two-way channel quality in a TDMA portable radio system is proposed and good spectrum efficiency and its potential for handling nonuniform traffic demand are demonstrated.Abstract:
We propose a control architecture for implementing a dynamic channel assignment (DCA) algorithm which optimizes two-way channel quality in a TDMA portable radio system. Computer simulations are used to evaluate the performance of this DCA method. A common control frequency, which is frame-synchronized among base stations, provides (1) beacons for portables to locate base stations and obtain DCA information, (2) broadcast channels for system and alerting information, and (3) pilot signals to permit portables to evaluate downlink interference. This allows low-complexity radio ports and portables to mutually select channels to avoid interference and avoid creating excessive interference. Results from computer simulations demonstrate the good spectrum efficiency of this method and its potential for handling nonuniform traffic demand. This work is targeted toward understanding the implications to local exchange networks of wireless system alternatives that could provide access to those networks.read more
Citations
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Journal ArticleDOI
Wireless personal communications: what is it?
TL;DR: This article attempts to identify different issues and to put many of the activities in wireless into a framework that can provide perspective on what is driving them, and perhaps even yield some indication of where they appear to be going in the future.
Journal ArticleDOI
Performance evaluation of distributed measurement-based dynamic channel assignment in local wireless communications
M.M.-L. Cheng,Justin C. Chuang +1 more
TL;DR: It is found that a simple aggressive algorithm with the use of a threshold, known as the least interference algorithm (LIA) performs the best in dynamic channel assignment (DCA).
Journal ArticleDOI
Network issues for wireless communications
TL;DR: This article specifically focuses on wireless personal communications, i.e., wireless access, that provides either terminal or personal mobility, that has significant impact on the network performance and addresses some important issues in networking, traffic, and performance.
Patent
System and method for selecting a transmission channel in a wireless communication system that includes an adaptive array
TL;DR: In this article, a method for establishing wireless communication between a transmitter and a receiver in a wireless communication system is disclosed, where the receiver includes an adaptive array that has at least two antennas.
Journal ArticleDOI
Wireless dynamic channel assignment performance under packet data traffic
M. Cheng,Li Fung Chang +1 more
TL;DR: This paper investigates the performance of two distributed measurement-based DCA schemes under Pareto-distributed packet data traffic, a well-known traffic model with heavy-tailed distribution and infinite variance and can provide guidelines for the future design of DCA and medium access control protocols for wireless Internet services.
References
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Journal ArticleDOI
800-MHz attenuation measured in and around suburban houses
TL;DR: These measurements are needed in refining the requirements for portable-radio communication systems that can accommodate low-power radiotelephone sets and large-scale distributions of the small-scale signal medians are approximately log normal.