Title :
Adaptive QoS control by toggling voice traffic between circuit and packet cellular networks
Author :
Kang, Jaewon ; Nath, Badri
Author_Institution :
Dept. of Comput. Sci., Rutgers Univ., USA
Abstract :
As cellular packet data services become widely deployed by the rollout of the networks such as general packet radio service (GPRS) and 3G cellular networks, packet-switched voice service such as voice over IP (VoIP) can soon be expected to be offered as an alternative to circuit-switched voice service. While circuit-switched voice offers better quality, packet-switched voice offers better resource utilization due to its multiplexing and compression techniques that can be used in packet radio principle. Therefore, the capability of having voice service over either circuit-switched network or packet-switched network provides a tradeoff between voice quality and bandwidth utilization. This paper proposes three schemes that allow users to toggle between circuit-switched voice and packet-switched voice based on the desired tradeoff. The basic idea is to allow ongoing voice traffic to alternate between circuit-switched network and packet- switched network using a 3-way calling mechanism in the SIP-enabled GSM/GPRS cellular network. We also show how these toggle schemes can be used depending on the cell load. Detailed performances of the proposed schemes are evaluated using simulation with realistic parameters of a cellular environment. The result shows our schemes can alleviate cell overloading as well as provide the smooth transition of an ongoing call between circuit-switched network and packet-switched network. Our schemes can be easily deployed in any cellular mobile network where circuit-switched network and packet-switched network coexist.
Keywords :
3G mobile communication; Internet telephony; adaptive control; bandwidth allocation; cellular radio; circuit switching; data compression; packet radio networks; packet switching; quality of service; speech coding; telecommunication control; telecommunication traffic; voice communication; 3-way calling mechanism; 3G cellular networks; GPRS; SIP-enabled GSM/GPRS cellular network; VoIP; adaptive QoS control; bandwidth utilization; cellular packet data services; circuit-switched voice service; compression techniques; general packet radio service; multiplexing techniques; packet cellular networks; packet radio principle; packet-switched voice service; quality of service; toggling voice traffic; voice over IP; Adaptive control; Cellular networks; Circuits; Communication system traffic control; Ground penetrating radar; Internet telephony; Land mobile radio cellular systems; Packet radio networks; Programmable control; Quality of service;
Conference_Titel :
Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE
Print_ISBN :
0-7803-7974-8
DOI :
10.1109/GLOCOM.2003.1258885