User's Manual

Hardware Installation Manual Introduction
02030311-03 Airspan Networks Ltd. 1-15
1.4.4. Repeater Solution
WipLL units can be used to provide repeater functionality. This is implemented in
where the BSR needs to be “extended” to remote subscriber sites that are blocked by
obstacles (such as trees, hills, and other typical line-of-sight obstructions) or that the
BSR-SPR (or BSR-IDR) transmission is out-of-range. Back-to-back Ethernet
connectivity of a BSR with an SPR/IDR provides the repeater capability, as
demonstrated in Figure 1-8.
Base Station Site
SPR B1
Backbone
SPR A1
SPR Ai
n
BSR A
B
S
D
U
B
S
D
U
B
S
D
U
B
S
D
U
GPS
BSPS
SDA
Router / switch
SPR
BSR
B
SDA SDA
SPR B2
SDA
SDA
Ethernet
SPR used as
a Repeater
Base Station Site
SPR B1
Backbone
SPR A1
SPR Ai
n
BSR A
B
S
D
U
B
S
D
U
B
S
D
U
B
S
D
U
GPS
BSPS
SDA
Router / switch
SPR
BSR
B
SDA SDA
SPR B2
SDASDA
SDASDA
Ethernet
SPR used as
a Repeater
Figure 1-8: WipLL Repeater Solution
In Figure 1-8, BSR A is part of a WipLL base station that is connected to the service
provider’s backbone. BSR A serves multiple SPRs, marked as SPR Ai. Two SPRs—
SPR B1 and SPR B2—cannot communicate directly with the base station.
Therefore, an SPR acts as a repeater by connecting back-to-back with BSR B (SPR
B1 and B2 are served by BSR B).