Considerations for VoIP Services in IEEE 802.16 Broadband Wireless Access Systems

IEEE 802.16 defines the air interface standard for fixed/mobile broadband wireless access (BWA) metropolitan area networks (MANs), which is expected to support quality of service (QoS) for real time application such as voice over IP (VoIP). However, three major technical problems that stand in the way are: 1) absence of MAC scheduling for supporting codecs with voice activity detector (VAD); 2) absence of mapping procedure between IEEE 802.16 service flow and network flow; 3) absence of efficient admission control for VoIP. This paper proposes two schemes, statistical UGS and UGS-rtPS combined scheduling, of MAC scheduling, addresses mapping RSVP FlowSpecs parameter into IEEE 802.16 QoS parameter, and devises simple admission control algorithm for VoIP services

[1]  Soung Chang Liew,et al.  Solutions to performance problems in VoIP over a 802.11 wireless LAN , 2005, IEEE Transactions on Vehicular Technology.

[2]  Kishor S. Trivedi,et al.  Supporting VBR VoIP Traffic in IEEE 802.11 WLAN in PCF Mode , 2002 .

[3]  Bih-Hwang Lee,et al.  VoIP services with embedded CAC over cable modem systems , 2005, IEEE Trans. Consumer Electron..

[4]  Chung G. Kang,et al.  Packet loss performance due to buffer overflow at transmitter side of wireless link , 2002 .

[5]  Rafael Estepa,et al.  Packetization and Silence Influence on VoIP Traffic Profiles , 2003, MIPS.

[6]  Taesoo Kwon,et al.  An efficient uplink scheduling algorithm for VoIP services in IEEE 802.16 BWA systems , 2004, IEEE 60th Vehicular Technology Conference, 2004. VTC2004-Fall. 2004.

[7]  Malathi Veeraraghavan,et al.  Support of voice services in IEEE 802.11 wireless LANs , 2001, Proceedings IEEE INFOCOM 2001. Conference on Computer Communications. Twentieth Annual Joint Conference of the IEEE Computer and Communications Society (Cat. No.01CH37213).

[8]  Laurie Cuthbert,et al.  Exact fluid-flow analysis of single on/off source feeding an ATM buffer , 1994 .

[9]  Raphael Rom,et al.  Scheduling constant bit rate flows in data over cable networks , 2002, Proceedings ISCC 2002 Seventh International Symposium on Computers and Communications.