Title :
Nomadic computing and CDMA
Author :
Cypher, D. ; Wakid, S.
Author_Institution :
Inf. Technol. Lab., Nat. Inst. of Stand. & Technol., USA
Abstract :
This paper shows how reliable data services can be provided in an error prone wireless environment using CDMA and a link layer retransmission protocol. A CDMA encoder using Walsh codes for 1.85 to 1.99 GHz PCS applications is simulated under various error conditions with varying packet size to determine minimum acceptable QOS relative to error templates. The error templates and data rates of 16, 32, and 64 kb/s for mobile terminal units are then used with a link layer retransmission protocol to examine the overhead and the practical feasibility of this protocol suite. Small packet sizes of about 50 to 100 bytes appear to provide promise for commercial implementations. Such implementations are also shown to be able to support upper layer TCP/IP services when TCP timers are disabled
Keywords :
code division multiple access; codes; computer network reliability; errors; mobile communication; performance evaluation; portable computers; telecommunication services; transport protocols; wireless LAN; 1.85 to 1.99 GHz; 16 kbit/s; 32 kbit/s; 64 kbit/s; CDMA; CDMA encoder; TCP timers; TCP/IP; Walsh codes; commercial implementations; data rates; error prone; error templates; link layer retransmission protocol; mobile terminal units; nomadic computing; packet size; protocol suite; quality of service; reliable data services; wireless LAN; AWGN; Access protocols; Base stations; Mobile computing; Multiaccess communication; NIST; Personal communication networks; Quality of service; TCPIP; Wireless application protocol;
Conference_Titel :
Distributed Computing Systems, 1997., Proceedings of the Sixth IEEE Computer Society Workshop on Future Trends of
Conference_Location :
Tunis
Print_ISBN :
0-8186-8153-5
DOI :
10.1109/FTDCS.1997.644715
