Harri Paloheimo

Energy-adaptive scheduling and queue management in wireless LAN mesh networks

Energy efficiency is of critical importance in future wireless communication systems where networked low-power devices relying on batteries should be able to communicate transparently. We present a novel cross-layer energy-adaptive scheduling and queue management framework EAED (Energy Aware Early Detection) for minimizing energy consumption in WLAN mesh networks. EAED aims at saving energy by delaying and early dropping packets with respect to target delay and packet loss constraints. We argue that gracefully trading off energy against QoS is justified by future networking scenarios where high connectivity is more important than bandwidth. We show performance results of EAED with real-time traffic in realistic WLAN Mesh network simulation scenarios and discuss possible use-cases for EAED framework. We conclude that considerable energy savings can be obtained with our scheme under certain limitations and propose ideas for further improvement.

Energy-Aware Interoperability of Manet and 4g Ran Routing

The requirements for telecommunication at 2012 are estimated to be on such demanding level that the 3G technologies will not be sufficient. It is unlikely that the 3G Radio Access Network (RAN) would scale up i.e., Fourth Generation (4G) RAN will need to be developed. The requirements for 4G are demanding and the level of uncertainty is high. The novel ad hoc networking technologies could provide flexible solutions for the 4G RAN and extend the operator radio coverage. Combining these differing communication technologies provides insight for the 4G RAN design. This paper analyses the Mobile Ad hoc Networks (MANET) requirements against the 4G requirements in terms of energy conservation. We find that there is mismatch between these two sets of requirements. Nevertheless, we demonstrate how these two approaches could co-exist in a mutually beneficial way. Finally, we propose interoperability requirements for MANET and 4G routing from the perspective of energy conservation.

Interoperability of MANET and 4G RAN Routing in Terms of Energy Conservation

The requirements for telecommunication at 2012 are estimated to be on such demanding level that the 3G technologies will not be sufficient. It is unlikely that the 3G Radio Access Network (RAN) would scale up, i.e., Fourth Generation (4G) RAN has to be redesigned. The requirements for 4G are demanding and the level of uncertainty is high. The developed ad hoc networking technologies could provide flexible solutions for the 4G RAN and extend the operator radio coverage. Combining these differing communication approaches provides insight for the 4G RAN design. This paper analyses the Mobile Ad hoc Networks (MANET) requirements against the 4G requirements in terms of energy conservation. The results describe, how these two approaches could co-exist in a mutually beneficial way. Our finding is that there is mismatch between the requirements. We propose solutions for interoperable requirements for MANET and 4G routing in terms of energy conservation.

Anatomy of automatic mobile carbon footprint calculator

A number of web-based systems provide environmental information to support our ecological lifestyle. However, there exists a need for more accurate and automated online systems facilitating personalised ecological awareness. This paper presents a travel type detection system for an automatic mobile carbon emission calculator. The system is able to detect automatically trips made by mobile users and provide them an easy and quick way for estimating the travel related CO2 emissions. The system is based on energy and computationally effective multisource fusion in a mobile device. The paper introduces the system with design rationale, explains smartphone implementation and provides comprehensive evaluation from both accuracy and energy efficiency points of view. The system attained the overall travel type detection accuracy of 77% and the daily average current consumption of 33mA. The results show great promise for the developed methodology to facilitate 24/7 carbon emission estimation of a traveller.

Increasing broker performance in smart-M3 based ridesharing system

Ridesharing is one of the most cost effective alternative transportation modes with high potential in reducing the greenhouse gas emissions and decreasing the amount of traffic in the streets. The paper extends the earlier presented approach to building sustainable logistics system for ridesharing support based on the idea of smart spaces, where various electronic devices can seamlessly access all required information distributed in the multidevice system from any of the devices. In particular, the paper describes broker as a main component of the system and algorithms used for its performance optimization. The Smart-M3 open source platform was chosen as a basis for the proposed approach.

Development of broker logic for ridesharing system on top of Smart-M3

Ridesharing is attracting more and more attention due to its high potential for applying new business models to private transportation in urban areas, reducing the greenhouse gas emissions and decreasing the amount of traffic on the streets. The paper extends the earlier presented approaches of building sustainable logistics system that support ridesharing by applying to it principles of smart spaces, where various electronic devices can seamlessly access all required information distributed in the multi-device system and all services are provided in pro-active manner. In particular, the paper describes the ontology and major components for the ridesharing system. An example implementation of the developed solution was done on top of Smart-M3 open source platform.

Challenges in Packet Scheduling in 4G Wireless Networks

Network information theory states that novel methods, such as, cooperative communication and relaying can increase the overall network transport capacity. These methods are not utilized in current networking technologies. The 3G RAN will not scale up to meet the requirements set for telecommunication in the next decade. We need a novel fourth generation (4G) RAN design. This paper analyses challenges in wireless packet scheduling algorithms for 4G systems and proposes energy efficient scheduling and queue management solutions for the 4G wireless environment. Focus in our work is kept on a relay networking scenarios, which comprise of operator managed RAN including relays together with user controlled mobile routers