Downlink queuing model and packet scheduling for providing lossless handoff and QoS in AG mobile networks

Next generation mobile networks are expected to provide seamless personal mobile communication and quality-of-service (QoS) guaranteed IP-based multimedia services. Providing seamless communication in mobile networks means that the networks have to be able to provide not only fast but also lossless handoff. This paper presents a two-layer downlink queuing model and a scheduling mechanism for providing lossless handoff and QoS in mobile networks, which exploit IP as a transport technology for transferring datagrams between base stations and the high-speed downlink packet access (HSDPA) at the radio layer. In order to reduce handoff packet dropping rate at the radio layer and packet forwarding rate at the IP layer and provide high system performance, e.g., downlink throughput, scheduling algorithms are performed at both IP and radio layers, which exploit handoff priority scheduling principles and take into account buffer occupancy and channel conditions. Performance results obtained by computer simulation show that, by exploiting the downlink queuing model and scheduling algorithms, the system is able to provide low handoff packet dropping rate, low packet forwarding rate, and high downlink throughput.

[1]  Stephen C. Dennett,et al.  The 3GPP and 3GPP2 movements toward an all-IP mobile network , 2000, IEEE Wirel. Commun..

[2]  Cyril Leung,et al.  An overview of scheduling algorithms in wireless multimedia networks , 2002, IEEE Wirel. Commun..

[3]  H. Soliman,et al.  Hierarchical mobile IPv6 mobility management , 2005 .

[4]  Mamoru Sawahashi,et al.  Comparison of packet scheduling algorithms focusing on user throughput in high speed downlink packet access , 2002, The 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.

[5]  Hemant Chaskar,et al.  Requirements of a Quality of Service (QoS) Solution for Mobile IP , 2003, RFC.

[6]  Narumi Yokohama-shi Umeda,et al.  Radio access network design concept for the fourth generation mobile communication system , 2000, VTC2000-Spring. 2000 IEEE 51st Vehicular Technology Conference Proceedings (Cat. No.00CH37026).

[7]  Youngnam Han,et al.  A channel-based scheduling algorithm for cdma2000 1xEV-DO system , 2002, The 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.

[8]  Kai Zhu,et al.  Achieving end-to-end delay bounds by EDF scheduling without traffic shaping , 2001, Proceedings IEEE INFOCOM 2001. Conference on Computer Communications. Twentieth Annual Joint Conference of the IEEE Computer and Communications Society (Cat. No.01CH37213).

[9]  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).

[10]  Stefan Parkvall,et al.  Performance of WCDMA high speed packet data , 2002, Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367).

[11]  K. Baughan,et al.  Visions of 4G , 2000 .

[12]  Antti Toskala,et al.  Wcdma for Umts , 2002 .

[13]  Ramjee Prasad,et al.  A novel flexible technology for intelligent base station architecture support for 4G systems , 2002, The 5th International Symposium on Wireless Personal Multimedia Communications.