RAPID5G contributes to the future of mobile communications by developing technologies next generation mobile wireless networks. Rapid aims to exploit advanced photonic techniques to provide disruptive solutions to current issues, especially for dense user scenarios.
13. G
Impact of 5G on In‐Building Networks
Major strain on mobile
networks
Exacerbate coverage and
capacity issues inside buildings,
due to:
High carrier frequencies
Much smarter devices
Will reveal major deficiencies of
current in‐building networks
Will require multiple levels of
network integration – including:
Wired/wireless, mixed signals
(incl. digital & analog), mixed
services, multiple transmission
protocols, multiple RATs, etc.
Extensive network complexity
will require centralized
coordination and management
Cellular
RF from
an Operator’s
Macro
Network
Glass
Metal
Concrete &
Insulation
Major
Coverage &
Capacity
Issues ‐
inbuilding
Major
Coverage &
Capacity
Issues ‐
inbuilding
Mm‐
waves
Mm‐
waves
14. G
RAPID‘s Centralized Radio Access Network Approach
• We see the C‐RAN paradigm as crucial for 5G to realize capacity, coverage,
throughput and energy efficiency demands, but…
• The C‐RAN for 5G (even for 4G) places enormous demands on the fiber front‐
haul.
• Use of low‐cost coherent and non‐coherent approaches for analogue and multi‐
level, ultra‐high bit‐rate digital transport
• Examining the functional split between BBU and RRH, to reduce bandwidth
demands on fronthaul – examining how this affects functionality (virtual MIMO,
beamforming weights)
• Use of ubiquitous technologies in fronthaul (e.g., Ethernet?)
• Timing/synchronisation requirements for C‐RAN transport, particularly for virtual
MIMO/CoMP
• Multiplexing strategies: compatibility with PON approaches and with
modulation/transport techniques
15. G
Network Capacity Increase by Deep Optical Fiber
Penetration
FTTxMetropolitan
Core
Long Haul Access
cell
site
Edge
CATV
Submarine
Ultra Long Haul
Premise
Fiber‐Wireless
Communication bottleneck = EDGE of Network
Low # of Users demands cost‐effective solutions