8
KX-TG3411BX/KX-TG3412BX/KX-TG3419BX/KX-TGA341BX
4.1.2.1.
TDD Frame Format
4.1.2.2.
TDMA system
This system is the cycles of 10 ms, and has 6 duplex paths,
but maximum duplex communication path is 5 because of dummy bearer use.
In 1 slot 833 us, the 10 ms of voice data is transmitted.
Each slot makes every frame frequency hop. (100 hops/sec.)
Although each slot (UpLink3 and UpLink4) uses different frequency, UpLink3 and DownLink3 use the same frequency.
•
2 - Handsets Link
Traffic Bearer
A link is established between base unit and handset.
The state where duplex communication is performed.
The hopping pattern of a 75 hops (750 mseconds) cycle.
Dummy Bearer
The base unit sends Dummy-data to the all stand-by state handsets.
The handsets receive that data for keeping synchronization and monitoring request from the base unit.
Dummy Bearer doesn't contain B-field (sound) data.
833
µ
s
5 ms
5 ms
Up Link ( Handset -> Base Unit )
Down Link ( Base Unit -> Handset )
DATA rate : 576 Mbps
RX1
RX2
RX3
RX4
RX5
RX6
TX1
TX2
TX3
TX4
TX5
TX6
RX1 RX2 RX3 RX4 RX5 RX6 TX1 TX2 TX3 TX4 TX5 TX6
TX
RX
RX
TX
Traffic Bearer
Dummy bearer
Base unit
Handset 1
(Stand by)
Handset 2
(Link)
Handset 3
(Link)