Salah S. Al-Majeed

Home telehealth by Internet of Things (IoT)

Home based Telehealth is a combination of communications, imaging, sensing and human computer interaction technologies targeted at diagnosis, treatment and monitoring patients without disturbing the quality of lifestyle. This paper proposes development of a low cost medical sensing, communication and analytics device that is real-time monitoring internet enabled patients physiological conditions. Internet of Things (IoT) network will provide active and real-time engagement of patient, hospitals, caretaker and doctors. Massaging and synchronising the system has been the based focus in this paper, where it applies the suggested algorithm to predict the minimum time period that separates two consecutive bursts of messages and measures the minimum queue sizes for the health care personals nods, to manage the traffic and avoid the dropping of messages. NS2 simulator was employed to simulate the Telehealth environment algorithm.

Semi-reliable transport protocol for IPTV over mobile WiMAX

As Internet IPTV extends to mobile devices, suitable transport protocols are sought that can adapt streaming to wireless access networks. This paper proposes a semi-reliable video-rate protocol that provides selective retransmission of scalable video layers should channel packet loss occur. The semi-reliable protocol leads to good video quality and reduces end-to-end delay and start-up delay.

Effective synchronisation of Hybrid Broadcast and Broadband TV

Watching a sport event via an IPTV channel and choosing a broadcast radio station as a play-out audio stream is the scenario discussed in this paper. Hybrid Broadcast and Broadband TV (hbbTV) provides an excellent platform to combine multimedia delivered via both systems. By following the recommendations in this paper, a synchronized play-out of multiple media streams delivered via the hbbTV system can be achieved.

Multi-connection TFRC video streaming in a WiMAX environment

Dedicated WiMAX multimedia services are proposed for areas that lack networked infrastructure. This paper proposes multi-connection uplink video streaming for mobile WiMAX. Establishing multiple TFRC connections for a single video stream has emerged as a promising lightweight way of coping with wireless channel losses in a congestion-controlled tandem network. This study shows the impact (in terms of video quality and latency) on multi-connection streaming performance in the presence of burst errors on the wireless link. It also establishes how many connections are feasible.

Effective Video Transport over WiMAX with Data Partitioning and Rateless Coding

Video streaming is anticipated to be a key application of broadband wireless access networks such as WiMAX. This paper proposes a combination of data-partitioning of compressed video information and rateless channel coding to ensure effective video transport. A counter-intuitive result is that comparatively improved objective video quality occurs even though privileged application-layer forward error correction is not given to high priority data. Instead a flat channel coding is used across the data partitions. The scheme results in a lower number of dropped packets at the transmitter buffer and/or a reduced number of packets corrupted by channel noise compared to simple slicing or no frame slicing at all. Larger-sized IEEE 802.16 (WiMAX) Time Division Duplex frames are found to reduce the number of packets dropped through traffic congestion.

Effective Broadband Video Streaming during wireless vertical handovers

While video streaming, vertical handover between heterogeneous wireless networks remains a scarcely addressed problem. Broadband Video Streaming (BVS) with adaptive packet retransmission promises better video quality during a Hard Handover (HHO) than both raw UDP transport and traditional congestion-controlled streaming, making it attractive to mobile video streaming services. It achieves this by distinguishing between high congestion and poor channel conditions, the latter of which an HHO induces, and by prioritized retransmission according to picture type.

A simple wireless broadband video streaming scheme for IPTV

Video streaming for IPTV is transferring to wireless mobile devices. This process poses questions of the video quality that will result and the suitability of the existing pseudo-streaming schemes for video transfer. This paper sets out the case for wireless broadband video streaming based on a simple negative acknowledgment (NACK) scheme, which for convenience is called broadband video streaming (BVS). The paper shows that provided the roundtrip time is limited then BVS has the better features of UDP transport and standardized Datagram Congestion Control Protocol (DCCP). For single link exchange, BVS is also superior to multiple DCCP connections in terms of video quality, though the use of multiple connections bring adequate wireless channel utilization. Thus, assuming content caching close to the broadband wireless access network then simple BVS is worthy of future elaboration.

Multi-connection TFRC Video Streaming in a Concatenated Network: Latency and Video Quality

Sending a single video stream over multiple TCP-Friendly Rate Control (TFRC) connections is a promising lightweight way of coping with wireless channel losses and traffic congestion in a concatenated network (one consisting of a broadband wireless link and a wired all-IP network). Multi-connections introduce the need for data re-ordering at the receiver. This paper considers the potential delay at an uplink destination on the Internet. It also considers the impact on video quality of packet drops due both to channel loss and router buffer overflow, when the TFRC congestion controller is applied. Results for an IEEE 802.16e (mobile WiMAX) link show a worthwhile gain in video quality from using three or more connections over a single connection but with start-up delay n the multi-connection case due to the need to avoid possible buffer underflow.

Client-server based wireless networked control system

There are tremendous developments and achievements during recent years, related to the use of wireless technologies in industry to provide flexibility, scalability and low cost. Wireless Networked Control Systems (WNCSs) based on Wireless Sensor Networks (WSNs) integrate three technologies: control engineering, computer networks and wireless communication. WNCSs are systems of smart and wirelessly connected devices equipped with limited communication, computation and sensing capabilities for control and monitoring applications. The design, building and implementation of a WNCS for a FlyWheel Position Control System (F-W PCS) are based on the XBee platform. A simulation of the wireless networked F-W PCS mathematical model was implemented using the TrueTime 1.5 MATLAB/Simulink Toolbox with the wireless networks between controller and plant nodes employing ZigBee (IEEE802.15.4) and Wi-Fi (IEEE802.11) protocols. The real-time wireless F-W PCS was realized and implemented successfully. Experimental set-up and simulation results show the feasibility and reliability of the system when it is compared with more traditional networked control systems.

Wireless handover with application to quadcopter video streaming over an IP network

Monitoring of oilfield well-head installations can be enhanced by Quadcopters equipped with video cameras flying at low altitude. Backhaul of a video stream from a Quadcopters camera takes place via WiMAX base-stations within the installation. This paper considers a problem that arises: Video stream interruption as a handover occurs between WiMAX base-stations. The paper presents a scheme for hard handover recovery during video streaming to a remote monitoring station. The selective Negative ACKnowledgment (NACK) scheme trades a reduced but acceptable video quality during handover for improved end-to-end latencies compared to unselective NACKs. Both forms of NACK (selective and unselective) promise better video quality (by several dB) than with UDP transport or traditional congestion-controlled streaming, which results in long delays during handovers.