Summary
IEICE Information and Communication Technology Forum
2015
Session Number:SESSION8
Session:
Number:SESSION8-2
Another cell size reduction of LTE network
Takahiko Yamada, Toshikazu Nishimura,
pp.-
Publication Date:2015-08-31
Online ISSN:2188-5079
DOI:10.34385/proc.22.SESSION8-2
Summary:
This paper proposes a new small cell network named Virtual Single Cell (VSC) network, besides one which the 3GPP studies, that is the macro-cell network enforced with small cells on very busy area. The VSC is applied to small cells which are contiguously deployed in campuses and belt-shaped service area along roads. It adopts EPON (Ether Passive Optical Network) for cost-effective backhaul network to accommodate large number of BSs (Base Stations) in dense small cell network. The VSC network offers reservation-based short gap handover. Each UE (User Equipment) is placed in an LMC (Logical Macro Cell) which consists of a few numbers of adjacent cells around the cell with a target UE. The handover in an LMC is directly triggered to a target BS using the reserved Schedule Request (SR) signaling on PUCCH (Physical Uplink Control Channel) of the 3GLTE based protocol. The LMC is also handed over following move of the target UE to enclose it in LMCs. The concatenated cells in LMCs for each UE can be regarded as a VSC allowing short handover gap. Handover resources like an SR code for handover triggering are prepared before handover action. Control signals and downward packets used in handover are multicast with EPON to every BS in each LMC. The overhead to achieve VSC is not necessarily large taking advantage of multicast over EPON. Packet transfer sequence integrity is maintained using sequence numbers in UE on handover not delivered through backhaul.