Optimizing information efficiency in a direct-sequence mobile packet radio network

Author

Chandra, Madhavi W. ; Hughes, Brian L.

Author_Institution

Cisco Syst., Research Triangle Park, NC, USA

Volume

51

Issue

1

fYear

2003

fDate

1/1/2003 12:00:00 AM

Firstpage

22

Lastpage

24

Abstract

We consider a direct-sequence multihop packet radio network using slotted ALOHA in a Rayleigh fading environment. We are interested in optimally choosing the transmission range, code rate, and slotted ALOHA transmission probability to be used by each node. We use a new performance measure, information efficiency, to analyze the network and show that the information efficiency of the low-cost mobile packet radio network can be improved approximately 20 fold by using the optimum parameters. We suggest a practical trellis-coded modulation scheme which comes close to realizing the theoretic limits found.

Keywords

Rayleigh channels; access protocols; mobile radio; optimisation; packet radio networks; spread spectrum communication; trellis coded modulation; Rayleigh fading; code rate; direct-sequence radio network; information efficiency optimization; mobile radio network; multihop radio network; packet radio network; slotted ALOHA; transmission range; trellis-coded modulation; Access protocols; Helium; Information analysis; Intelligent networks; Packet radio networks; Performance analysis; Rayleigh channels; Receivers; Spread spectrum communication; Traffic control;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2002.807607

Filename

1181539