Efficient energy utilization with a time constraint and time varying channels

John J. Metzner, Jong Moon Chung

Research output: Contribution to conferencePaper

Abstract

In this paper the efficiency in energy utilization under time constraints is compared between two data transmission strategies: transmission through sending a fixed number of copies, and the ARQ technique. The analysis was held assuming that each packet repetition is decoded separately, and also for the case where the combined decision is used under time varying channel conditions. The first example is under constant channel conditions where decisions are held without packet copy combining, for various values of probability of failure (P) and a limited maximum number of transmissions (n). Results indicate that there is a large saving of energy by the ARQ technique compared to transmitting a fixed number of copies for rather small values of n, and the energy saving ratio increases even more with a larger n and also in the case for smaller P values. In the second experiment, packet combining is carried out on a per symbol basis. The overall packet is presumed to have near perfect error detection and possibly also error correction. For numerical comparison purposes a Rayleigh distribution was selected to describe the received power variation of the time varying channel. The results indicate that the saving in energy is substantial, though not as great as in the non-combining case. Unlike the previous experiment, the energy saving ratio increases only for decreasing P values and not for increasing n.

Original languageEnglish
Pages183-186
Number of pages4
Publication statusPublished - 1997
EventProceedings of the 1997 IEEE International Symposium on Consumer Electronics, ISCE'97 - Singapore, Singapore
Duration: 1997 Dec 21997 Dec 4

Other

OtherProceedings of the 1997 IEEE International Symposium on Consumer Electronics, ISCE'97
CitySingapore, Singapore
Period97/12/297/12/4

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Fingerprint Dive into the research topics of 'Efficient energy utilization with a time constraint and time varying channels'. Together they form a unique fingerprint.

  • Cite this

    Metzner, J. J., & Chung, J. M. (1997). Efficient energy utilization with a time constraint and time varying channels. 183-186. Paper presented at Proceedings of the 1997 IEEE International Symposium on Consumer Electronics, ISCE'97, Singapore, Singapore, .