Recent Advances in Communications and Networking Technology (Formerly Recent Patents on Telecommunication) (Discontinued) - Volume 3, Issue 2, 2014

Accuracy and scalability contribute to the quality of location solutions in wireless networks. While accuracy is a parameter addressed in all location technologies, scalability is often relegated. However, scalability becomes an actual issue in positioning solutions based message exchange (e.g. measuring ranges from beacons). The passive TDOA algorithm is a solution designed to localize terminals in a mobile ad hoc network in Read More

Currently all-optical Dense Wavelength Division Multiplexing (DWDM) communication networks [1] are able to transport packet data end-to-end without the need to convert the transport wavelength(s) to an electrical signal. These networks today operate similar to their electrically-based network counterparts. That is, while all-optical DWDM networks have distinct advantages over electrically-based transport networks [2, Read More

Alamouti proposed orthogonal STBCS for two transmit antennas with code rate one. Tarkoh investigated for three to eight transmit antennas with code rate 1/2. Jafarkhni proposed for non orthogonal STBCS four transmit antennas with code rate one. The theory of space-time block codes was further developed by Weifen Su and Xian-Gen Xia. They defined space time block codes in terms of orthogonal code matrices. The prop Read More

In the advanced communication system multi carrier and multichannel technique is used. Due to the physical properties of the channel some undesirable effects occur on the transmitted signals. At the receiving end, signals get attenuated, distorted, delayed, and phase shifted. In order to compensate for these effects perfect and up-to-date channel estimation is needed. In this paper, we have proposed modified step size l Read More

Location management is an important part in mobile cellular networks since the registered devices can change location while connected to the network. Location management has been of prime research interest over the past decades and several mechanisms have been proposed for legacy systems. However, these mechanisms have to be revisited in the scope of LTE and especially 5G networks where new usage scen Read More

Internet service providers (ISP) are offering 4G network services through several wireless technologies such as WLAN, WiFi, WiMAX, LTE, etc. Thus, multimode devices will be able to manage communication links with different networks and support seamless mobility in these networks. To make decision for network selection during handoff, this paper proposes an Agent based vertical handoff decision algorithm that motivates us Read More