School of Electronic Engineering and Computer Science

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Exploiting D2D communication for energy saving in 5G heterogeneous cellular networks

Supervisor: Dr Faisal Tariq

Research group(s): Networks

Massive deployment of small cells over the macrocell coverage has been considered as one of the most promising pathways for achieving the vision for future 5G cellular networks supporting very high data rate for users regardless of the location. When a high number of access points are available, at low traffic conditions, a significant number of the AP may also be very lightly loaded which leads to the energy inefficiency. A considerable amount of energy can be saved if the unused small cells APs are switched off or go in hibernation when there is no traffic to particular cells. A further saving can be made if the users of the lightly loaded cells are offloaded to suitable neighbouring cells when available while ensuring the required QoS. However, the amount of user offloading using these techniques are limited as there are constraints over transmit power and coverage range expansion. If this user association techniques can be considered with D2D enabled system, then more number of users can be offloaded since a user can be associated to a cell, even though it is not covered by that access point, when a UE within the coverage of the AP acts as a relay for that user. This project will aim at designing mechanism for exploiting D2D communications for freeing some lightly loaded cells and switching them off to ensure further energy saving.
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