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doc: bts.adoc: Update dyn ts section to include SDCCH8 support 

Related: SYS#5309
Change-Id: I40f4b19e7df83351c9c9e65d71880ac6aaa4ee88
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Pau Espin 2021-07-08 11:00:16 +02:00
parent 729980ef4c
commit fd3204e0de
1 changed files with 6 additions and 5 deletions
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doc/manuals/chapters/bts.adoc
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@ -272,10 +272,11 @@ specification for the detailed meaning of those timers.
=== Dynamic Timeslot Configuration (TCH / PDCH)
A dynamic timeslot is in principle a voice timeslot (TCH) that is used to serve
GPRS data (PDCH) when no voice call is active on it. This enhances GPRS
bandwidth while no voice calls are active, which is dynamically scaled down as
voice calls need to be served. This is a tremendous improvement in service over
A dynamic timeslot is in principle a timeslot that is used to serve GPRS data
(PDCH), but that can be switched to be used either for voice (TCH) or signalling
(SDCCH8) when all other static timeslots are already in use. This enhances GPRS
bandwidth while there is no CS load, and is dynamically scaled down as CS
services need to be served. This is a tremendous improvement in service over
statically assigning a fixed number of timeslots for voice and data.
The causality is as follows: to establish a voice call, the
@ -313,7 +314,7 @@ a PCU, SGSN and GGSN to provide the actual data service.
==== Osmocom Style Dynamic Timeslots (TCH/F_TCH/H_SDCCH8_PDCH)
Timeslots of the `TCH/F_TCH/H_SDCCH8_PDCH` type dynamically switch between TCH/F,
TCH/H and PDCH, depending on the channel kind requested by the MSC. The RSL
TCH/H, SDCCH8 and PDCH, depending on the channel kind requested by the MSC. The RSL
messaging for `TCH/F_TCH/H_SDCCH8_PDCH` timeslots is compatible with Ericsson RBS.
BTS models supporting this timeslot kind are shown in <<dyn_ts_compat>>.