[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.
diff --git a/openbsc/src/chan_alloc.c b/openbsc/src/chan_alloc.c
index a23192a..c42b60b 100644
--- a/openbsc/src/chan_alloc.c
+++ b/openbsc/src/chan_alloc.c
@@ -259,6 +259,8 @@
lchan->meas_rep[i].flags = 0;
lchan->meas_rep[i].nr = 0;
}
+ for (i = 0; i < ARRAY_SIZE(lchan->neigh_meas); i++)
+ lchan->neigh_meas[i].arfcn = 0;
/* FIXME: ts_free() the timeslot, if we're the last logical
* channel using it */