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- Elfström, Magnus, 1971-, et al.
(author)
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Reablement for older persons by an interprofessional home rehabilitation team : An ongoing RCT
- 2018
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Conference paper (other academic/artistic)abstract
- The aim is to evaluate the effects of intensive home rehabilitation regarding multidimensional health perceptions and other quality of life domains, physical ability and capacity among older people (65+). The design is a randomized controlled study of a reablement intervention with controls receiving traditional home care. The intervention is goal- and user oriented, home-based, time limited (3 months), and organized by an interprofessional team consisting of the professions nurse, enrolled nurses, physiotherapists, social worker, and occupational therapists. The effects of the intervention are measured by self-reported health and quality of life (EQ-5D-5L, HACT) including psychological well-being (GP-CORE), physical capacity (SPPB, hand dynamometer test), activity performance (COPM), and home care hours needed. Data are collected at inclusion (T1; applying for home care), after the three months intervention (T2), and at six months (T3). Primary outcome analyses will be performed according to intention to treat; 2 x 3 mixed design (group x time) ANCOVA with each dependent variable at T1 as covariate. Based on a medium effect size in favour of the intervention in the pilot study, and a dropout of 20%, the power calculation indicated that 240 persons should be included. The project will contribute with evidence of the effects of interprofessional home rehabilitation for reablement, and consequences for older persons’ bio-psycho-social health. The project is ongoing with more than 120 persons included. The intervention may result in reduced costs for care, but especially individual gains in relation to reduced care needs, maintained independence and good health.
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- Monti, Paolo, et al.
(author)
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Mobile backhaul in heterogeneous network deployments : Technology options and power consumption
- 2012
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In: 14th International Conference on Transparent Optical Networks. ; , s. 1-7
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Conference paper (peer-reviewed)abstract
- Mobile communication networks account for 0.5% of the global energy consumption, a value that is expected to double within the next five years. For this reason, means of reducing the energy consumption in cellular mobile radio networks has recently gained great interest within the research community. In mobile networks the backhaul contribution to the total power consumption is usually neglected because of its limited impact compared to that of the radio base stations. However, meeting the almost exponential increase in mobile data traffic requires a large number of (mainly small) base stations. This means that backhaul networks will take a significant share of the cost and the energy consumption in future systems. Their actual contribution to the energy consumption will depend on the radio base station deployment scenario as well as on the technology and topology choices for the backhaul itself. This paper presents an initial assessment of the power consumption of two established backhaul technologies, i.e., fiber and microwave. For the microwave case, three backhaul topologies are considered, i.e., tree, ring and star, while for the fiber case only one topology is analysed, i.e., a dedicated point-to-point star. The presented results, assuming off-the-shelf products and based on todays network capacity levels, confirm the importance of considering the backhaul when minimizing the total power consumption in heterogeneous network scenarios. They also show the impact of the basic technology and topology choices of the backhaul for minimizing total power consumption.
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- Tombaz, Sibel, 1984-, et al.
(author)
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Is backhaul becoming a bottleneck for green wireless access networks?
- 2014
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In: 2014 IEEE International Conference on Communications, ICC 2014. - : IEEE. - 9781479920037 ; , s. 4029-4035
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Conference paper (peer-reviewed)abstract
- Mobile operators are facing an exponential traffic growth due to the proliferation of portable devices that require a high-capacity connectivity. This, in turn, leads to a tremendous increase of the energy consumption of wireless access networks. A promising solution to this problem is the concept of heterogeneous networks, which is based on the dense deployment of low-cost and low-power base stations, in addition to the traditional macro cells. However, in such a scenario the energy consumed by the backhaul, which aggregates the traffic from each base station towards the metro/core segment, becomes significant and may limit the advantages of heterogeneous network deployments. This paper aims at assessing the impact of backhaul on the energy consumption of wireless access networks, taking into consideration different data traffic requirements (i.e., from todays to 2020 traffic levels). Three backhaul architectures combining different technologies (i.e., copper, fiber, and microwave) are considered. Results show that backhaul can amount to up to 50% of the power consumption of a wireless access network. On the other hand, hybrid backhaul architectures that combines fiber and microwave performs relatively well in scenarios where the wireless network is characterized by a high small-base-stations penetration rate.
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