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This paper explains the performance of voice over LTE system using different voice codec. LTE is the third generation partnership program 3GPP communication system which is wireless in nature and is also the first IP based system. VoLTE (Voice over LTE) is expected to be deployed in the near future for providing voice services. It's ability to reach high throughput is promising in both downlink and...
Enhanced Distributed Channel Access (EDCA) is a mandatory part of the IEEE 802.11e standard which provides Medium Access Control (MAC) layer solution for Quality of Service (QoS) provisioning in Wireless Local Area Networks (WLANs). It is a contention based protocol which prioritizes channel access to QoS traffic using four Access Categories (ACs). In this paper, we introduce the performance evaluation...
This paper proposes a solution for throughput and stringent delay problems of VoIP in Ad-Hoc mode of IEEE 802.11 WLAN standards. This paper analyses the behaviour different codecs and schemes of WLAN running on VoIP traffic and draws a conclusion on the performance of network based on the criteria of different QOS parameters. Later the suitability of different routing protocols like AODV, DSR, OLSR...
Next Generation Network (NGN) is a packet based network which can support the expansion of broadband and introduction of triple play (Voice +Data +Video) over fixed and mobile line. Before deployment of NGN, the capacity and Quality of Service (QoS) over NGN must be ensured. In this paper, the technologies proposed by Huawei have been applied to ensure the capacity and QoS over NGN. Then the optimized...
In the last years, broadband satellite networks have emerged as a flexible technology offering high-speed Internet access to large communities of users at relatively low-cost. At the same time, the large widespread of VoIP and Multimedia over IP (MoIP) applications, has pointed out the need of investigating their performance over heterogeneous networks and, more specifically, on wireless and satellite...
Multimedia applications have been the key driving force in converging fixed, mobile and IP networks. A major hurdle in the realisation of this convergence is obtaining Quality of Service from a heterogeneous, best-effort service network. Interactive voice requires strict bounds on delay, jitter and packet losses, video adds significant bandwidth requirements to the network, while Internet only makes...
Nowadays IEEE 802.11 family is the most popular technology amongst wireless protocols including Bluetooth, UWB and WiMAX for wireless services, among which media streaming such as voice over Internet Protocol (VoIP) and IPTV are most demanded with high challenge. To accommodate the QoS issues, EDCA and HCCA functions are defined in IEEE 802.11e. However, EDCA provides QoS based on probability, so...
In recent years the interest in supporting voice over IP (VoIP) services over wireless local area networks (WLANs) based on IEEE 802.11 standard is growing. A key issue on this topic is to understand how well the 802.11 can support quality of service (QoS) for VoIP services. Recently ITU-T has released the E-model recommendation to evaluate voice quality perceived by users. In this paper we present...
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