diff options
| author | Harald Welte <laforge@netfilter.org> | 2009-12-21 13:30:17 +0100 |
|---|---|---|
| committer | Harald Welte <laforge@netfilter.org> | 2009-12-21 13:33:10 +0100 |
| commit | f7c28b099f928cc6fb48fc9cc072656d8c3bb902 (patch) | |
| tree | 2631e72801c2e13a2b47564f9616174cb195c372 /openbsc/src/gsm_data.c | |
| parent | ade773f44193052ade3be70b794130dd6a39ee06 (diff) | |
[handover] Real handover algorithm
This implements the handover algorithm (and associated parameters)
as described in Chapter 8 of the book "Performance Enhancements in
a Frequency |Hopping GSM Network" by Thomas Toftegard Nielsen and Jeroen
Wigard.
The parameters such as averaging windows are configured in struct
gsm_network. We keep some state to trakc up to 10 neighbors as
they are being reported from the MS.
This has so far only been tested in a network with two BTS that
have each other as neighbor. Networks with morge neighbors might
encounter bugs.
Diffstat (limited to 'openbsc/src/gsm_data.c')
| -rw-r--r-- | openbsc/src/gsm_data.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/openbsc/src/gsm_data.c b/openbsc/src/gsm_data.c index 94ed91ba5..12f439be2 100644 --- a/openbsc/src/gsm_data.c +++ b/openbsc/src/gsm_data.c @@ -210,6 +210,14 @@ struct gsm_network *gsm_network_init(u_int16_t country_code, u_int16_t network_c net->T3113 = GSM_T3113_DEFAULT; /* FIXME: initialize all other timers! */ + /* default set of handover parameters */ + net->handover.win_rxlev_avg = 10; + net->handover.win_rxqual_avg = 1; + net->handover.win_rxlev_avg_neigh = 10; + net->handover.pwr_interval = 6; + net->handover.pwr_hysteresis = 3; + net->handover.max_distance = 9999; + INIT_LLIST_HEAD(&net->trans_list); INIT_LLIST_HEAD(&net->upqueue); INIT_LLIST_HEAD(&net->bts_list); |