Packet voice transmission for indoor optical wireless networks

This paper presents a study of an optical wireless system capable of supporting packet voice services in an indoor environment. Diffused infrared (IR) systems offer user mobility, as is the case with radio systems, high bandwidth and abundant unregulated spectrum. The proposed system utilises the concept of packet reservation multiple access (PRMA) protocol for sharing the IR medium to mobile terminal units (TUs) under time-division duplex (TDD) mode. In addition, optical codes for reservation can be used to prevent collisions while many TUs are apply for slot reservation simultaneously. By analysis, we reveal the performance parameters such as average access delay, throughput, statistical multiplexing gain, and packet dropping probability for the system.

[1]  Joseph M. Kahn,et al.  Wireless Infrared Communications , 1994 .

[2]  Rahim Tafazolli,et al.  Statistical upper bounds and performance evaluation of packet reservation-based multiple access protocols in cellular communications systems , 1995, Proceedings of 6th International Symposium on Personal, Indoor and Mobile Radio Communications.

[3]  E. Glavas,et al.  Optical power distribution in wireless infrared LANs , 1996 .

[4]  Lemin Li,et al.  Dynamic slot allocation multiple access protocol for wireless ATM networks , 1997, Proceedings of ICC'97 - International Conference on Communications.

[5]  Bhaskar Ramamurthi,et al.  Packet reservation multiple access for local wireless communications , 1989, IEEE Trans. Commun..

[6]  Changxin Fan,et al.  Study of frame-based PRMA protocol under time-division duplex , 1997, GLOBECOM 97. IEEE Global Telecommunications Conference. Conference Record.

[7]  Masahiro Umehira,et al.  ATM wireless access for mobile multimedia: concept and architecture , 1996, IEEE Wirel. Commun..

[8]  Carl M. Harris,et al.  Fundamentals of queueing theory , 1975 .

[9]  David Stuart Robertson,et al.  Performance of a statistically multiplexed access mechanism for a TDMA radio interface , 1995, IEEE Wirel. Commun..

[10]  Joseph M. Kahn,et al.  Experimental characterization of non-directed indoor infrared channels , 1995, IEEE Trans. Commun..

[11]  Jaafar M. H. Elmirghani,et al.  Sensitivity evaluation of optical wireless PPM systems utilising PIN-BJT receivers , 1996 .

[12]  S. Nanda,et al.  Resource auction multiple access (RAMA) for statistical multiplexing of speech in wireless PCS , 1993, Proceedings of ICC '93 - IEEE International Conference on Communications.

[13]  Giuseppe Anastasi,et al.  An Access Protocol for Speech/Data/Video Integration in TDMA-Based Advanced Mobile Systems , 1997, IEEE J. Sel. Areas Commun..

[14]  David J. Goodman,et al.  Performance of PRMA: a packet voice protocol for cellular systems , 1991 .

[15]  Kwang-Cheng Chen,et al.  Performance of group randomly addressed polling with reservation in wireless integrated service networks , 1995, Proceedings of GLOBECOM '95.