path: root/include
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authorHarald Welte <>2012-11-20 10:13:44 +0100
committerHarald Welte <>2012-11-20 10:13:44 +0100
commit73a809e57b8a531b9b8a33b6841ed3df2ea22620 (patch)
tree76effaeb610b2394769991614fd54e5802e292ab /include
parent2879e77bd3720f261330dad2ef7f14d6a0988421 (diff)
Tell L1CTL_FBSB_REQ the expected received signal level
As Dieter points out, this drastically improves the resiliance to high receive levels on the C155. We cannot blindly assume a received signal level of -85 dBm if the BTS is 2m away and we actually receive -40 dBm. This patch extends the L1CTL_FBSB_REQ data structure in layer 1 with the respective field, as well as the l1ctl_tx_fbsb_req() API function called from the various layer23 apps. "mobile" and "bcch_scan" already did a PM request and thus know the expected signal power. "ccch_scan" and "cbch_sniff" apparently don't do, so the -85 dBm constant is now hardcoded into the host-side source code there, and should probably be fixed in a follow-up patch.
Diffstat (limited to 'include')
1 files changed, 1 insertions, 0 deletions
diff --git a/include/l1ctl_proto.h b/include/l1ctl_proto.h
index 4b9540e9..771bf1c3 100644
--- a/include/l1ctl_proto.h
+++ b/include/l1ctl_proto.h
@@ -167,6 +167,7 @@ struct l1ctl_fbsb_req {
uint8_t flags; /* L1CTL_FBSB_F_* */
uint8_t sync_info_idx;
uint8_t ccch_mode; /* enum ccch_mode */
+ uint8_t rxlev_exp; /* expected signal level */
} __attribute__((packed));
#define L1CTL_FBSB_F_FB0 (1 << 0)