Real-time voice communications over a token-passing ring local area network

ABSTRACT

This paper describes an implementation of a real-time, packetized voice communication system over a personal computer (PC) based token-passing ring local area network. System configuration and operation are presented. The system implements real-time, conversational transmission of voice packets between two stations on the network. An analysis is shown to calculate the maximum number of two way conversations that can be handled by the system without any reconstitution delay.

REFERENCES

• 1: Brady, P.T. "A Stat, istical Analysis of On-off Pat. terns In SLxteen Conversations", Bell System Technical Journal Vol. 47, January, 1908
• 2: DeTreville J., "A Simulation-based Comparison of Voice Transmission on CSMA/CD Networks mid Token Bus", Bell System Technical Journal, 1983
• 3: DeTreviIle, J. and Sincoskie, W.D. "A Distributed Experimental Comlnunicatiol~ System" IEEE Journal On Selected Areas in Conllnunications, Vol. SAC-l, No. B December 1983 'A Layered Network Proto-
• 4: Hoberecl~t, W.L.,' col for Packet Voice and Data Integration" IEEE Journal On Selected Areas in Communications, \rol. SAC-l, No. 6 December 1983
• 5: Nlusser, J.b.I., Liu, T.T., Li L. and Boggs G.J. "A Local Area Network as a Telcplmne Local Subscriber I~oot>", IEEE Journal O~l Selected Areas in Cmnmunicat'i~ns' Vol. SAG-i, No. 6 December 1983
• 6: Nut{, G.J. and Bayer, D.L., "Performance of CSMA/CD Networks Under Combined Voice and Data Loads" {EEE Transactions on Co,nmunications, Vol. COM-30, January 1,982
• 7: Proteon proNET, "IBM PC Local Network System User's Guide", Draft 2, June 1984
• 8: Saydam, T., and Sethi, A.S., "Performance Evaluation of Voice-Data Token Ring L>kNs With Random Priorities," Proceedings of the IEEE Infocom '85, pp. 320-330, March 1985.
• 9: William Stallings, Local Networks, Prentice Hall PTR, Upper Saddle River, NJ, 1984
• 10: Weinstein, C.J. and Forgie, J.W., "Experience with Speech Communication in Packet Networks" IEEE Journal On Selected Areaa in Communicat~ions, Vol. SAC-l, No. 6 Decelnber 1983
• 11: Wong, J.W., and Gopal, P.M., "Analysis of a Token Ring Protocol for Voice Transmission," Proceedings IEEE Computer Network Symprslum, pp. 113-117, December 1983.
• 12: Ziegler, (7., Dhadesugoor, V.R., and Schilling, D.L., "DelLa Modulators in Packet Voice Networks," IEEE Trans. on Commun., vol. CONI* 28, pp. 33-51, Jan. 1980.
• 13: Ziegler, C., Dhadesugoor, V.R., and Schilling, D.L., "Source Encoding Using Delt~a Mod~tation in Packet Voice Networks," Conference Record of NTC '79, pp. 4.4.1-4.4.5, Nov. 1979.
• 14: Ziegler, C., DlJadcsugoor, V.R., Chakraverthy, G.B., and Schilling, D.L., "Delta Modulation Packet Voice Network witt~ a Variable Packet Size Algorithm," Conference Record of NTC '79, pp. 13.2.1-13.2.5, Nov. 1979.
• 15: Ziegler, C., Dhadesugoor, V.R., and Schilling, D.L., "Digital Silence Detection in Delta Modulation Packet, Voice Networks," Conference Record of ICC '79, pp. 24.7.1-2,t.7.5, June 1979.

INDEX TERMS

Classification:
  B. Hardware
  B.4 INPUT/OUTPUT AND DATA COMMUNICATIONS
      B.4.1 Data Communications Devices
          Subjects: Receivers (e.g., voice, data, image)
      B.4.2 Input/Output Devices
          Subjects: Voice

  C. Computer Systems Organization
  C.1 PROCESSOR ARCHITECTURES
  C.2 COMPUTER-COMMUNICATION NETWORKS
      C.2.5 Local and Wide-Area Networks
          Subjects: Token rings

General Terms:
Experimentation, Standardization