Citation
Li, Tonghong and Liao, Jianxin and Qi, Qi and Cao, Yufei and Zhu, Xiaomin and Wang, Jingyu
(2012).
An optimized QoS scheme for IMS-NEMO in heterogeneous networks.
"International Journal of Communication Systems", v. 25
(n. 2);
pp. 185-204.
ISSN 1074-5351.
https://doi.org/10.1002/dac.1263.
Abstract
The network mobility (NEMO) is proposed to support the mobility management when users move as a whole. In IP Multimedia Subsystem (IMS), the individual Quality of Service (QoS) control for NEMO results in excessive signaling cost. On the other hand, current QoS schemes have two drawbacks: unawareness of the heterogeneous wireless environment and inefficient utilization of the reserved bandwidth. To solve these problems, we present a novel heterogeneous bandwidth sharing (HBS) scheme for QoS provision under IMS-based NEMO (IMS-NEMO). The HBS scheme selects the most suitable access network for each session and enables the new coming non-real-time sessions to share bandwidth with the Variable Bit Rate (VBR) coded media flows. The modeling and simulation results demonstrate that the HBS can satisfy users' QoS requirement and obtain a more efficient use of the scarce wireless bandwidth.