Transparently Reconfigurable UbiquitouS Terminal

For mode monitoring we investigated the novel cooperative mode monitoring solution. The cooperative mode monitoring work within the system aspects work package have demonstrated the feasibility of such techniques. This will enable terminals to have lower power consumption and simpler radio implementations by eliminating the need to continuously perform alternative mode monitoring.

Important results on advanced spectrum sharing techniques carried out in TRUST are described, which focused on Radio Access Technologies' (RATs) joint radio resource management (JRRM). We provide details on cellular FDD/TDD JRRM and address the different sources of traffic (regular asymmetric and download) to be considered in an SDR context.

We developed innovative energy management techniques for re-configurable terminals based on ANN (Artificial Neural Networks). Simulations and a HW testbed have been produced for evaluating the potential of ANN¿s for battery capacity prediction at a given discharge current. The research into battery state estimation has demonstrated that there are a number of different techniques available and each of these has its own advantages. The method investigated has modelled the characteristics accurately, however, it has been shown that neural networks have limitations in terms of implementation.

Downloading applications, services as well as entire protocol suites to end user terminals is a key enabler for ubiquitous terminal operation and seamless service provision. Whereas many potential schemes for downloading software to re-configurable terminals may be envisaged, over the air (OTA) software download followed by immediate installation on the end user terminal promises to offer ever present network and service availability. The impact of software downloads on the QoS of regular users is a critical issue in evaluating the feasibility of OTA software downloading. Within TRUST the impact of software downloading on overall network capacity and QoS of regular users was investigated by carrying out system level simulations for UMTS FDD. In particular, the trade off between deploying circuit switched and packet switched bearer services for software downloading was carefully evaluated.

The TRUST hardware validator based on adaptive modulation techniques in UTRA-FDD for downlink was developed and requirements for this link adaptation process were gathered. The demonstrator was showcased at the 2nd TRUST workshop, 28.03.02 and is showcased at the IST Summit 2002 in Greece.The TRUST hardware validator showed that adaptive modulation improves the average BER and leads to a higher user satisfaction.

We improved and validated the broadband and flexible radio operation covering power amplifier linearity, tunable filtering, linear frequency translation and transceiver architectures. Demonstrations covering filters and mixers for broadband Rx chains were given at the IST Summit 2001.

The overall system architecture developed within WP4 has provided a first definition of the main system functional components and interactions required to support re-configurable terminals. This architecture has been developed in the standard Unified Modelling Language (UML) format to enable more detailed UML analysis and design and also to ease the dissemination and exploitation of the system concepts by partners and external organisations continuing the work on systems aspects of re-configurable terminals (for example standards and regulatory bodies).

We investigated scalability in the H.263+ video coding standard. H.263+ only allows frame based layered scalability. We also investigated the other most significant standard for low bit rate video coding, namely MPEG-4. MPEG-4, in addition to conventional frame based layered scalability, offers additional tools for object based and fine granular scalability.

We developed a novel software architecture for a re-configurable baseband sub-system of TRUST architecture. We developed how re-configuration is administered and managed in the baseband. The type of signalling and protocols necessary for baseband re-configuration were also designed. Whilst this flexible architecture is restricted in its scope to the baseband sub-system, it is conceptually suitable for re-configuration of higher layers as well, assuming a conventional modular protocol stack.

TRUST worked on a wide range of flexible transceiver algorithms, which have been designed for employment in future generations of broadband wireless multimedia systems. Algorithmic research and performance analysis carried out for a scalable MC DS-CDMA system and investigation of a high-efficiency and low-complexity information representation which are suitable for long-term software radio terminals.

Starting from elicited user requirements in the first project phase, both end user and operators, TRUST determined detailed use-cases via scenario discussion groups, questionnaires, market study and interviews. Resulting use cases were mapped to technology requirements and were represented in UML for use in future technology validation models. Four core user scenarios were developed based on user data elicited from the first project phase. These scenarios have led to the definition of end-user and operator issues. The end-user issues identified for the scenarios were used for the detailed user feedback. A huge (64 participants) subjective evaluation campaign of scalable video coding has been carried out which defines the requirements on scalable video coding being an inherent part of future terminals.

TRUST published 124 papers and presentations, submitted several contributions to ITU-R WP8F, 3GPP MExE, WWRF and SDR Forum and organised two international workshop on Re-configuration in Mobile Radio Networks. Coordinated the cluster reconfigurability.

Deliverables

Share this page

Download