Correct question :=)
PBCCH, done this or way or that way, must be implemented to
"harvest" the real goodies of packet networks and air
interfaces (based on the legacy GSM, CDMA is even worse)
But when will the voice/packet ratio of the cell/network
traffic,capacity be at, beneath or above that edge??
(Note the E in GEran and WCDMA on the horizon)
Turning on a incoming call, connecting and ending it
is probably not a very demanding control channel task.
(except when 10,000 youngster collect at that rock festival
in that one cell)
SMS messages is one more issue, the magic sauce the
existence on the control channel.
Me thinks the robustness of "GPRS" would be really
compromised if there would be 10-100 millions of handsets
roaming without a tested, verified packet control channel
when that would be turned on, all handsets instantly
switching to this unverified, optimal, complex feature.
But now it seems handsets can be sold which will only
use the tested and verified BCCH channel, more
time to test the unverified, sometimes in the near
future optimal and verified, PBCCH channels.
---
Clearly DCCM did not now become "GPRS", as that bit wasn't
approved nor voted on, withdrawn by Nokia (to reach the
preferrable, finnish traditional, consensus decision,
good for the future)
But the duality of the "GPRS" control channel seem to
have been approved as "GPRS" as PBCCH is not anymore
_mandatory_ when someone throws the swith to activate
it on the network,cell side.
That is, the old handset go their old, tested, verified
ways, and only the near-future , new handsets will "camp" on that
new thingy soon to appear from the mast.
And who knows, maybe even the new ones will be kind of dual and
controllable, optionally now or mandatory in the soon to
come future?? (door left open??)
Ilmarinen
pretty fun how the keyword is "optional", just like
in investor "options".
As well as "shorting", what Motorola tried their best at.
"risk managament" is the real goodie, so difficult to
describe in simple good-evil,right-wrong terms, what
Nokia tried to bring up, with no approval for the
"select this or that" thing.
(a basic concensus rule is that no changes can be made
until even the stupidiest has understand it, still waiting
for Motorola, as well as Becket) |
