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In Heterogeneous networks applied ANDSF, UEs select the access network based on priority provided by ANDSF. The congestion network has the lower priority, need to recover the lower priority when congestion is over. In this paper, introduce the recovery method of the lower priority to the default priority based on time value. As a result, the network is able to provide a better QoS with UE, also expected...
In the IEEE 802.11p vehicular network, the periodic beacon broadcasting of safety messages requires status advertisement to assist drivers in maintaining safety. In high vehicular density situations, the channel becomes overloaded, thereby increasing the probability of beacon collision that increases the delay. In this paper, we have considered game theoretic models of wireless medium access control...
This letter presents an antenna design method for a dual antenna with high isolation for mobile stations (MSs) and includes a verification method for improving the correlation performance of an MS that uses a proposed multiple-input–multiple-output (MIMO) antenna by using MIMO over-the-air (OTA) channel models. The large-scale parameters for the MIMO OTA channel models are important because they determine...
The hybrid networks of WLAN and WMAN can provide high data rate and enhanced multimedia services, but there are many challenges to obtain handover decision based dynamic QoS information. IEEE 802.21 aims at providing a framework that defines media independent handover (MIH) mechanism that supports seamless handover across hetero geneous networks. In this paper, we propose a new approach network selection...
Wireless networking is becoming a popular and important way to provide global information access to users on the move. Current technologies are different in their characteristics such as bandwidths, latencies, frequencies and media access methods. Most existing wireless network technologies can be divided into two categories: those that provide a low-bandwidth service over a wide area and those that...
With the rapid growth of wireless technologies, the task of providing efficient connectivity is still a challenge. Since almost wireless network poses many problems, including limited bandwidth, coping with bandwidth fluctuations, and lost or corrupted data, lots of studies have been done and many solutions proposed. The IEEE 802.16 WiMAX is a standard for the wireless broadband access networks and...
Recently, with the expansion and advent of the wireless Internet such as WiFi, mobile WiMax, and mobile peer-to-peer (P2P) voice over IP (VoIP) communication through P2P overlay network in all-IP area has been deeply investigated as a research area. When the connected peer terminal leaves hot spot of all-IP area, it will be lost the communication session. In this paper, we propose seamless voice connection...
Ad hoc networks are wireless networks of mobile nodes, self-organizing systems formed by co-operating nodes within communication range of each other that form temporary networks in which the topology rapidly changes result from the movement of mobile nodes. This frequent topology may lead to sudden packet losses and delays. So, the current implementation of TCP for the Internet is not efficient when...
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