User Guide

AB-Access Config & User Guide 5.5 Axxcelera Broadband Wireless
July 27, 2004 Company Confidential Page 36 of 129
5.10.3 Type 3 Interference
Uplink to Access Point
interfered with by another
Access Point Downlink. This is
only an issue if sectors using
the same frequency face each
other in the reuse pattern, e.g.,
Cell 1 and Cell 3. Otherwise it
is a benign interference type,
e.g., Cell 1 and Cell 2.
5.10.4 Type 4 Interference
Uplink to Access Point
interfered with by a Subscriber
Unit Uplink in another cell.
This is the worst case of
intercell interference, as one
SU, e.g., in Cell 2, interferes
with all the users on the same
frequency and polarization in
Cell 1 (whenever the SU in
Cell 2 is transmitting). As the
system has power control for
SUs, the worst case Type 4
interference will be caused by
SUs deployed at range and at
the edge of their sector, i.e., in
the Access Point Antenna
Cusp.
Cell
1
Cell
2
Interfering AP
Interference
path
Cell
3
Interferin
g AP
Cell 1
Cell 2
Interfering CT
Interference
path