Research at Communication Systems
Current projects led by the Division of Communication Systems
Very Large MIMO Systems (ICT rambidrag)
Large MIMO Systems for High Throughput Reliable and Power-Efficient Wireless Communication
Spectrally efficient and robust future generation radio.
Improved retransmission schemes for OFDM-based mobile broadband systems
EU FP7 projects where we are partner
Sharing Physical Resources - Mechanisms and Implementations for Wireless Networks (SAPHYRE)
- Project webpage
In current wireless communications, radio spectrum and infrastructure are
typically used such that interference is avoided by exclusive allocation of
frequency bands and employment of base stations. SAPHYRE will demonstrate how
equal-priority resource sharing in wireless networks improves spectral
efficiency, enhances coverage, increases user satisfaction, leads to increased
revenue for operators, and decreases capital and operating expenditures.
SAPHYRE represents a consortium that spans the entire chain from spectrum regulatory aspects, networking, physical layer to hardware implementation. The vision of SAPHYRE is to:
- show how voluntary sharing of physical and infrastructure resources enables a fundamental, order-of-magnitude-gain in the efficiency of spectrum utilisation;
- develop the enabling technology that facilitates such voluntary sharing;
- determine the key features of a regulatory framework that underpins and promotes such voluntary sharing.
- SAPHYRE analyses and develops new self-organising physical layer resource (spectrum, spatial coexistence) sharing models by a generalised cross-layer and cross-disciplinary approach.
- SAPHYRE proposes and analyses efficient co-ordination mechanisms which require only small intervention (to counteract selfish, malicious users). In particular in sharing scenarios, incentive based design is applied in order to reduce regulatory complexity.
- SAPHYRE develops a framework for infrastructure sharing to support quality of service with sufficiently wide carrier bandwidths and competition between different operators.
Achieving Low-Latency in Wireless Communications (LOLA)
- Project webpage
- Project summary: The focus of LOLA is on access-layer technologies targeting low-latency robust and spectrally-efficient transmission in a set of emerging application scenarios. We consider two basic types of wireless networks, namely long-range LTE-Advanced Cellular Networks and medium-range rapidly-deployable mesh networks. Research on low-latency transmission in cellular networks is focused firstly on transmission technologies in support of gaming services which will undoubtedly prove to be a strategic revenue area for operators in the years to come. Secondly, we also consider machine-to machine (M2M) applications in mobile environments using sensors connected to public infrastructure (in trains, busses, train stations, utility metering, etc.). M2M is an application area of extremely high growth potential in the context of future LTE-Advanced networks. A primary focus of the M2M research is to provide recommendations regarding PHY/MAC procedures in support of M2M to the 3GPP standardization process. The rapidly-deployable mesh topology component addresses M2M applications such as remote control and personnel/fleet tracking envisaged for future broadband civil protection networks. This work builds upon ongoing European research in this important area. Fundamental aspects of low-latency transmission are considered in addition to validation on real-time prototypes for s subset of the considered application scenarios. The cellular scenario validation is carried out using both live measurements from an HSPA test cell coupled with large-scale real-time emulation using the OpenAirInterface.org emulator for both high-performance gaming and M2M application. In addition, a validation testbed for low-layer (PHY/MAC) low latency procedures will be developed. The rapidly deployable wireless mesh scenario validation makes use of the real-time OpenAirInterface.org RF platform and the existing FP6 CHORIST demonstrator interconnected with commercial M2M equipment.
Nationally funded projects where we are partner
Resource allocation and multi-node cooperation in radio access networks
Distributed antenna systems
Trust Wireless (ICT rambidrag)
Erik G. Larsson
Senast uppdaterad: 2013 12 08 23:23