COPHIWI · Cooperation in Hybrid Wireless Networks
FP6 — Marie Curie Actions (Human Resources and Mobility)
- Duration
- 2006-11-01 → 2009-10-31
- EU contribution
- €362,878
- Participants
- 2
- Scheme
- OIF
Lines connect the coordinator with its partners.
Results in brief
Final Activity Report Summary - COPHiWi (Cooperation in Hybrid Wireless Networks)
Wireless communications systems in general and hybrid networks (such as cellular systems) in particular are of major interest as they allow the provision of continuous services to mobile users. In recent years, a considerable research effort has been devoted to the development of new technologies for providing better services and extending system coverage. In this context, the use of multi-cell processing (MCP) has been identified as a key tool for enhancing system performance. Unlike the conventional approach, in which each infrastructure node (or base-station) processes its user nodes' signals treating other signals as noise, in MCP a subset of the system infrastructure nodes jointly process their user nodes' signals to reduce the inter-system interference and increase the overall system performance. This project explores various aspects of infrastructure nodes and user nodes cooperation in hybrid wireless networks. In particular, suboptimal MCP schemes such as joint zero forcing beam forming were proposed and shown to provide near optimal performance. Another aspect investigated here is the impact of real life impairments of the backhaul network connecting the base-stations. In this context both limited connectivity, and limited capacity link backhaul networks were considered. In yet another part of the work the benefits of combining relaying and MCP were studied for various relaying schemes such as decode-and-forward, amplify-and-forward, and compress-and-forward. The dynamic nature of such systems was also addressed, where the interplay between random number of users and MCP technique was investigated. The various schemes involving MCP were shown to provide dramatic improvement on the achievable throughputs when compared to those achieved by the traditional approaches. It is noted that several system models (involving relaying and limited backhaul networks in cellular systems) presented in the project papers were widely adopted by the relevant research community. The analyses carried out involve advanced techniques from the fields of information theory, probability theory, and random matrix theory. The results of this project were published in 11 peer-reviewed journal papers and were presented in 24 oral presentations of peer-reviewed conferences papers. Some of the results were summarised in a book chapter dealing with distributed antenna systems. Furthermore, a paper considering the impact of limited backhaul networks on the performance of MCP, won the first best student paper award of the IEEE international symposium on information theory (ISIT'07).
Data: CORDIS, © European Union
Project objective
Future wireless network applications are envisioned to feature very high data rates over large areas covering entire cities and beyond. Attempting to address anticipated requirements with conventional wireless network architectures is likely to be infeasible.A solution relying solely on an increase in the number of base-stations will probably be economically doomed. This motivates the search for architectures that integrate different types of networks and combine their strengths. Such networks are generally referred to as Hybrid wireless networks.As an example of a Hybrid network, a wireless LAN with a core infrastructure of access points complements a cellular network by supporting locally high throughputs and extending the coverage of the cellular networks to areas subject to severe path loss or fading, such as indoors or the cell periphery.In another typical scenario, infrastructure nodes are employed to ease the inherent throughput 'bottleneck' of Ad-Hoc networks. In this research, we intend to present and explore a novel concept of cooperation among infrastructure nodes in cellular and Hybrid wireless networks.Analytical tools from various fields, such as Information Theory, Game Theory, Random Matrices Theory, and Probability Theory will be used to enable cross-layer design, and to explore various performance merits of cellular and hybrid wireless networks with cooperative infrastructure nodes (base-stations).The objectives presented in this proposal coincide with the following HRM objectives:- enhancing the EU scientific excellence and competitiveness in the field,- supporting regulatory and standardization efforts- establishing long term collaboration between the EU and USA, and- reinforcing the international dimension on the proposer's career.In addition, we contribute to the following ERA actions:- Broadband for all,- Mobile and Wireless Systems and Platforms Beyond 3G, and- Early warning systems for geo-physical hazards.
Original text from CORDIS.
Participants
- TECHNION - ISRAEL INSTITUTE OF TECHNOLOGY · HAIFACoordinatorIsrael
- PRINCETON UNIVERSITY · PRINCETONUnited States
Links
Data: CORDIS, © European Union