Performance modeling and evaluation of data/voice services in wireless networks

Application-level performance is a key to the adoption and success of the CDMA 2000. To predict this performance in advance, a detailed end-to-end simulation model of a CDMA network is built to include application traffic characteristics, network architecture, network element details using the proposed simulation methodology. We assess the user-perceived application performance when a RAN and a CN adopt different transport architectures such as ATM and IP. To evaluate the user-perceived quality of voice service, we compare the end-to-end packet delay for different vocoder schemes such as G.711, G.726 (PCM), G.726 (ADPCM), and vocoder bypass scheme. By the simulation results, the vocoder bypass scenario shows 30% performance improvement over the others. We also compare the quality of voice service with and without DPS scheduling scheme. We know that DPS scheme keep the voice delay bound even if the service traffic is high. For data packet performance, HTTP v.1.1 shows better performance than that of HTTP v.1.0 due to the pipelining and TCP persistent connection. We may conclude that IP transport technology is better solution for higher FER environment since the packet overhead of IP is smaller than that of ATM for web browsing data traffic, while it shows opposite effect to the small size voice packet in RAN architecture. We show that the 3G-1X EV-DO system gives much better packet delay performance than 3G-1X RTT. The main conclusion is that end-to-end application-level performance is affected by various elements and layers of the network and thus it must be considered in all phases of the development process.

[1]  Matthew Andrews,et al.  Providing quality of service over a shared wireless link , 2001, IEEE Commun. Mag..

[2]  Leonard Kleinrock,et al.  Theory, Volume 1, Queueing Systems , 1975 .

[3]  Charles A. Dvorak,et al.  Speech transmission performance planning in hybrid IP/SCN networks , 1999, IEEE Commun. Mag..

[4]  Alfred C. Weaver,et al.  (M,P,S)-an efficient background traffic model for wide-area network simulation , 1997, GLOBECOM 97. IEEE Global Telecommunications Conference. Conference Record.

[5]  A. Reyes-Lecuona,et al.  traffic model for wireless system simulations , 2001 .

[6]  Raj Jain,et al.  Packet Trains-Measurements and a New Model for Computer Network Traffic , 1986, IEEE J. Sel. Areas Commun..

[7]  Abhay Parekh,et al.  A generalized processor sharing approach to flow control in integrated services networks: the single-node case , 1993, TNET.

[8]  Feng Li,et al.  QoS support in IP/MPLS-based radio access networks , 2003, The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring..

[9]  Scott Shenker,et al.  Analysis and simulation of a fair queueing algorithm , 1989, SIGCOMM 1989.

[10]  Walid Hamdy,et al.  Effect of physical layer bandwidth variation on TCP performance in cdma2000 , 2003, The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring..

[11]  Oriol Sallent,et al.  Provisioning multimedia wireless networks for better QoS: RRM strategies for 3G W-CDMA , 2003, IEEE Commun. Mag..

[12]  Zbigniew Dziong,et al.  Wireless Internet Access Using IS-2000 Third Generation System: A Performance and Capacity Study , 2002, Wirel. Networks.

[13]  Hui Zhang,et al.  Service disciplines for guaranteed performance service in packet-switching networks , 1995, Proc. IEEE.

[14]  A. Jalali,et al.  Data throughput of CDMA-HDR a high efficiency-high data rate personal communication wireless system , 2000, VTC2000-Spring. 2000 IEEE 51st Vehicular Technology Conference Proceedings (Cat. No.00CH37026).

[15]  Vern Paxson,et al.  Empirically derived analytic models of wide-area TCP connections , 1994, TNET.