Litao Liang

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To provide mobile users with seamless wireless access and guaranteed quality of service (QoS) anywhere and anytime, it is a trend to integrate CDMA cellular networks and wireless local area networks (WLANs) into heterogeneous networks in next generation all-IP wireless networks. Network selection and QoS support for different services are two of the major(More)
Optimizing reverse logistics network is important to the sustainable development of logistics. In this paper, we established a reverse logistics network multi-objective optimization model which fully considered environment effect and the waste recycling factors, such as locations, frequency, quality and quantity. This model can ensure that both the whole(More)
With the wide deployment of wireless local area networks (WLANs), the problem of configuration and maintenance of access points (APs) arises. The traditional manual configuration method greatly increases the cost of configuration and maintenance of the WLANs system and hinders the scalability of WLANs. The plug-and-play (PnP) of APs, which means that APs(More)
To overcome the disadvantage in traditional manual configuration method for WLANs, such as the high configuration and maintenance cost and low efficiency of system performance, we propose the plug-and-play (PnP) of multi-mode APs that APs auto-configure themselves based on the network environment. In order to implement the PnP, the Multi-mode AP must obtain(More)
A utility based centralized self-configuration algorithm (UCSCA) is proposed to improve global quality of service (QoS) performance in heterogeneous radio network. The radio access technology (RAT) limitation, together with the base stations restrictions, makes it difficult to achieve a high-performance network reconfiguration solution (base stations(More)
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