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96 From GSM to LTE-Advanced Pro and 5G

TFI (5 bit)
RLC/MAC header User data

1 3 1
PDTCH downlink

TFI (down) = 1
Figure 2.20 Use of the temporary flow identifier (TFI) in the downlink direction.

[...]
RLC/MAC PACKET TIMESLOT RECONFIGURE
000111-- Message Type : 7 = packet timeslot reconfigure
------00 Page Mode : 0 = normal paging
Global TFI:
--01111- Uplink Temporary Flow Identifier : 15
00------ Channel Coding Command : Use CS-1 in Uplink
Global Packet Timing Advance:
----0001 Uplink TA Index : 1
101----- Uplink TA Timeslot Number : 5
----0001 Downlink TA Index : 1
101----- Downlink TA Timeslot Number : 5
---0---- Downlink RLC Mode: RLC acknowledged mode
----0--- CTRL ACK : 0 = downlink TBF already established
xxxxxxxx Downlink Temporary Flow ID : 11
xxxxxxxx Uplink Temporary Flow ID : 15
Downlink Timeslot Allocation:
-0------ Timeslot Number 0 : 0
--0----- Timeslot Number 1 : 0
---0---- Timeslot Number 2 : 0
----0--- Timeslot Number 3 : 0
-----1-- Timeslot Number 4 : 1 = assigned
------1- Timeslot Number 5 : 1 = assigned
-------1 Timeslot Number 6 : 1 = assigned
0------- Timeslot Number 7 : 0
Frequency Parameters:
--000--- Training Sequence Code : 0
xxxxxxxx ARFCN : 067
[...]

Figure 2.21 Packet Timeslot Reconfiguration message according to 3GPP TS 44.060, 11.2.31 [4].