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Change T3101 default from 10s to 3s. 

This timer is started when a channel is allocated with an IMMEDIATE
ASSIGNMENT message. It is stopped when the MS has correctly seized the
channel.  Ever since the early days of development we were using a very
long timeout to be on the safe side.  However, in production networks
this is a terrible waste of resources, as we will occupy 10s worth
of air-time on one of our channels for each RACH request we receive.

The only scenarios where you might need something absurdly high as 10s
would be if you have 8s of RTT between your BTS and the BSC.

See also https://osmocom.org/projects/osmobsc/wiki/Timers

Change-Id: If3c52a7cf0c06d074c44a2fc414679279189aab9
Closes: OS#2733
This commit is contained in:
Harald Welte 2017-12-10 19:55:18 +01:00
parent 4bd710d107
commit dea252d29c
1 changed files with 1 additions and 1 deletions
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2
include/osmocom/bsc/gsm_data.h
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@ -262,7 +262,7 @@ enum gsm_auth_policy {
GSM_AUTH_POLICY_REGEXP, /* accept IMSIs matching given regexp */
};
#define GSM_T3101_DEFAULT 10 /* s */
#define GSM_T3101_DEFAULT 3 /* s */
#define GSM_T3103_DEFAULT 5 /* s */
#define GSM_T3105_DEFAULT 100 /* ms */
#define GSM_T3107_DEFAULT 5 /* s */