GE MDS Mercury 3650, Справочное руководство

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16 Mercury Reference Manual 05-4446A01, Rev. E
Invisible place holder
Figure 1-11. Typical Store-and-Forward Repeater Arrangement
As with the conventional repeater described in Option 1 above, the loca-
tion of a store and forward repeater is also important. A site must be
chosen that allows good communication with both the Access Point and
the outlying Remote site. This can be on the top of a hill, building, or
other elevated terrain from which all sites can be “seen” by the repeater
station antenna. A detailed discussion on the effects of terrain is given
in
Section 5.1.2, Site Selection (beginning on Page 164) .
1.4.2 Protected Network Operation using Multiple
APs
Although GE MDS transceivers have a very robust design and have
undergone intensive testing before being shipped, it is possible for iso-
lated failures to occur. In mission-critical applications, down time can
be virtually eliminated by using some, or all, of the following configu-
rations:
In a point-to-multipoint scenario, the Access Point services multiple
remotes. A problem in the Access Point will have an effect on all
remotes, since none will have access to the network. When operation of
the network does not tolerate any down time, it is possible to set up a
protected configuration for the Access Point to greatly reduce the possi-
bility of this occurrence.
Two or more Access Points can be configured identically, each with its
own independent antenna. In this scenario, Remotes will associate with
one of the available Access Points. In case of a failure of that AP, the
Remotes will quickly associate with another Access Point, re-estab-
lishing connectivity to the end devices. Because only one Access Point
operates at any given time, collisions between APs is not possible.
1.4.3 Collocating Multiple Radio Networks
Many networks can operate in relatively close physical proximity to one
another provided reasonable measures are taken to assure the radio
signal of one Access Point is not directed at the antenna of the second
Access Point.
Remote
Remote
Remote
Remote
Access Point
LAN/WAN
REPEATER
LAN
LAN
LAN