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T
heWHERE2projectaddresses thecombi-
nationofpositioningandcommunications
inorder toexploit synergiesandtoenhance
theefficiencyof futurewirelesscommunications
systems.
ThekeyobjectiveofWHERE2 is toassess the
fundamental synergiesbetweenthetwoworlds
ofheterogeneouscooperativepositioningand
communications intherealworldunder realistic
constraints.Theestimationof thepositionof
mobileterminals (MTs) is themaingoal in
WHERE2.Thepositioningalgorithmscombine
measurements fromheterogeneous infrastructure
andcomplement thembycooperativemeasure-
mentsbetweenMTs,additional informationfrom
inertial sensors,andcontext information.Based
ontheperformanceof thegeo-aidedpositioning
strategies (inthesenseofaccuracy, complexity,
overheadof signaling, reliabilityof theprovided
information, etc.) the impactoncoordinated,
cooperative,andcognitivenetworks isassessed.
This isdoneunder realisticscenariosandsystem
parameters followingon-goingstandardization
processes.
ThesecondgoalofWHERE2 is todesign
improvedcommunicationsystemsbyexploiting
locationandtrajectory information.Thesystems
exploredherearecellular systems (allocation
of relays,anticipatedhandovers,multi-user
coordinationexploitingline-of-sight conditions,
macro-femtocell interferencecoordination,adhoc
networkestablishment, cognitiveradiowithloca-
tionbasedinterference levelpredictionsetc.).A
jointandintegrateddemonstrationusingmultiple
hardwareplatformsprovidesaverificationof the
performanceofdedicatedcooperativealgorithms.
contact:
Dirk.Slock@eurecom.fr
web:
http://www.kn-s.dlr.de/where2/index.php
WHERE2
T
he quest for sustainable communi-
cations with very low carbon emis-
sion and ultra-high throughput per
km2 is the driving factor for ECOSCells. Our
answer is a network paradigm with reduced
cells’size in cellular networks and frequency
band sharing. The conventional schemes are
not efficient in terms of power and frequency
band consumption to deal with the increased
level of interference fromadjacent cells when
their density increases. A paradigm shift is
required: the new cellular networks need to
allocate dynamically resources from a com-
mon pool while maintaining decentralized
control functions, high level of efficiency in
the use of the resources, and an acceptable
level of signalling. These considerationsmoti-
vate our vision of endowing next generation
cellular networks with devices able to moni-
tor and sense their surroundings, learn from
their monitoring, and smartly and dynamically
allocate resources.
The project aims at developing the algo-
rithms and solutions for 4G/4G+ (e.g. LTE)
required for Small Cells Network (SCN) deploy-
ment. The algorithms are based on most
recent development in distributed algorithms,
game theory, reinforcement learning. Also,
the architecture and the algorithms for the
backhauling network are proposed. Finally,
the solutions developed in the project are val-
idated by simulations and are implemented
on an industrial development platform with
the objective to deliver a prototype of SCN
base station. The project targets to validate
the industrial value of the SCN concept.
ECOSCells is a French project involving
major French industrial and academic tel-
ecommunication players. EURECOM contrib-
utes to the innovation core of the project with
the development of solutions based on rein-
forcement learning, stochastic cooperative
games and advanced interference alignment
algorithms.
contact:
Laura.Cottatelluci@eurecom.fr
web:
http://ecoscells.twn-bl.homeip.net
ECOSCells:
Efficient Cooperating Small Cells
Densely located access points connect mobiles to a backhaul consisting of e.g. ADSL, fiber, power lines.
High density allows slow power emission but increases interference. Intelligent devices able to monitor and
sense their surroundings, learn from it, and capable to smartly and dynamically allocate resources effectively
manage interference. (Figure by Gaoning He)
right: with ICIC. The ICIC exploits
location information.
Coverage holes (blue dots) due to femto base
stations in a cellular network
left: without InterCell Interference
Coordination (ICIC).
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EURECOM
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Graduate school and research center in communication systems