written 4.8 years ago by
teamques10
★ 61k
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modified 4.8 years ago
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When sectoring is employed, lot of handoffs is required due to
this load on switching and control link element of the mobile
system increases.
- To solve this problem, a microcell concept for seven cell reuse is
used.
- In this scheme, each of three (possibly more) zone sites are
connected to single base station. The zone are connected by a coaxial, fibre optic cable or microwave link to a base stations.
- Multiple zones and single station make a cell. As mobile travels
within a cell, it served by zone with strong signal.
- As mobile moves from one zone to another zone in same cell, it
uses same channel, thus like a sectoring, handoff is not required at
mobile switching centre (MSC) when mobile travels within the cell in different zone.
- The base station simply changes the channel from one zone to
another zone, and channel is active in particular zone in which
mobile is travelling, hence interference is reduced.
- The advantage of zone cell technique is that, cell maintains
particular area of coverage, the co-channel interference in cellular
system is reduced, as larger control base station is replaced by
zone transmitter on edge of cell.