Overview

Overview

Objective

Internet and mobile communication are the symbols of today’s ICT. The former yields many new revolutions in our social life and the latter provides a pervasive communication media by which people can communicate each other anytime, anywhere and anybody. However, the current mobile communication systems only render limited access to the services being matured in Internet due to their limited bandwidth, a nature of wireless media.

Enormous services and growing knowledge which Internet is getting to hold should be also accessible wirelessly in a post ICT. Realization of such a ubiquitous broadband communication is the objective of MIMO-MESH project.

Overview of MIMO-MESH project

Wireless Mesh NetworkWireless Mesh Network

However, inflation of data rate reduces range of wireless coverage, which raises investment cost for building access points so as to cover service area. Mesh network is an only enabler to reduce this cost by its flexible architecture.

With mesh networks, access points are connected wirelessly and exchange data frames each other to forward them to/from a gateway point. Since the mesh requires no costly cable constructions for backhaul network, it reduces total investment cost. This capability of the mesh can boost extending covered service area easily and flexibly.

For further cost reduction, a large scale mesh is desirable. To clear this challenging hurdle, development of a high capacity mesh is being strongly demanded. The MIMO-MESH project aims at developing a mesh point in palm size with high capacity wireless relay interfaces.

■Technologies to be applied
IPT forwarding
（Intermittent Periodic Transmit）		 An original packet forwarding scheme with capability of reducing radio interferences in forwarding path. IPT forwarding is good at achieving high throughput in long hop relays whereby a large scale mesh is enabled.
MIMO Relay wireless interface can be improved by applying MIMO. We pursue a MIMO relay with low power consumption.
Antenna Palm size is an essential requirement in development of our mesh point. High gain antenna is desirable to get long reach of relay radio, however it is enabled at the expense of larger size. We pursue small antennas with high gain by support of our RF staff with rich antenna design skills.