diff options
| author | Philipp Maier <pmaier@sysmocom.de> | 2020-08-21 22:40:23 +0200 |
|---|---|---|
| committer | Philipp Maier <pmaier@sysmocom.de> | 2020-09-07 12:44:41 +0200 |
| commit | cc6d35d788d0164b3cff1c7536ee9121d95aa8b8 (patch) | |
| tree | 4740d41791861dcfdca574f142c8d3a737f350e8 /include/osmocom | |
| parent | e2b20c4aa855fd295b72e090bd1df6cc12bd5993 (diff) | |
abis_rsl: prioritize emergency calls over regular calls
when an emergency call arrives while all TCH are busy, the BSC should
pick an arbitrary (preferably the longest lasting) call / lchan and
release it in favor of the incoming emergancy call.
The release of the existing call is a process that can not be done
synchronously while the ChanRQD is handled sonce multiple messages are
exchanged between BTS and MSC and multiple FSMs need to do their work.
To be able to release one lchan while handling a ChanRQD a queue is
implemented in which the incomming channel requests are collected. If
an emergency call is established while all channels are busy, an
arbitrary lchan is picked and freed. When freeing the lchan is done,
the queue is checked again and the emergency call is put on the free
lchan (TCH/H or TCH/F).
Change-Id: If8651265928797dbda9f528b544931dcfa4a0b36
Related: OS#4549
Diffstat (limited to 'include/osmocom')
| -rw-r--r-- | include/osmocom/bsc/abis_rsl.h | 2 | ||||
| -rw-r--r-- | include/osmocom/bsc/bts.h | 1 | ||||
| -rw-r--r-- | include/osmocom/bsc/lchan_fsm.h | 2 | ||||
| -rw-r--r-- | include/osmocom/bsc/lchan_select.h | 1 |
4 files changed, 6 insertions, 0 deletions
diff --git a/include/osmocom/bsc/abis_rsl.h b/include/osmocom/bsc/abis_rsl.h index 2611a3d00..9879497f4 100644 --- a/include/osmocom/bsc/abis_rsl.h +++ b/include/osmocom/bsc/abis_rsl.h @@ -118,5 +118,7 @@ int ipacc_payload_type(enum gsm48_chan_mode tch_mode, enum gsm_chan_t type); int rsl_tx_rf_chan_release(struct gsm_lchan *lchan); +void abis_rsl_chan_rqd_queue_poll(struct gsm_bts *bts); + #endif /* RSL_MT_H */ diff --git a/include/osmocom/bsc/bts.h b/include/osmocom/bsc/bts.h index a50c70e64..7f369042e 100644 --- a/include/osmocom/bsc/bts.h +++ b/include/osmocom/bsc/bts.h @@ -634,6 +634,7 @@ struct gsm_bts { struct osmo_timer_list etws_timer; /* when to stop ETWS PN */ struct llist_head oml_fail_rep; + struct llist_head chan_rqd_queue; }; #define GSM_BTS_SI2Q(bts, i) (struct gsm48_system_information_type_2quater *)((bts)->si_buf[SYSINFO_TYPE_2quater][i]) diff --git a/include/osmocom/bsc/lchan_fsm.h b/include/osmocom/bsc/lchan_fsm.h index df3ed2212..9fe7db107 100644 --- a/include/osmocom/bsc/lchan_fsm.h +++ b/include/osmocom/bsc/lchan_fsm.h @@ -74,3 +74,5 @@ bool lchan_may_receive_data(struct gsm_lchan *lchan); void lchan_forget_conn(struct gsm_lchan *lchan); void lchan_set_last_error(struct gsm_lchan *lchan, const char *fmt, ...); + +void lchan_fsm_skip_error(struct gsm_lchan *lchan); diff --git a/include/osmocom/bsc/lchan_select.h b/include/osmocom/bsc/lchan_select.h index 865181bf5..41e7015cf 100644 --- a/include/osmocom/bsc/lchan_select.h +++ b/include/osmocom/bsc/lchan_select.h @@ -4,3 +4,4 @@ struct gsm_lchan *lchan_select_by_type(struct gsm_bts *bts, enum gsm_chan_t type); struct gsm_lchan *lchan_select_by_chan_mode(struct gsm_bts *bts, enum gsm48_chan_mode chan_mode, enum channel_rate chan_rate); +struct gsm_lchan *lchan_avail_by_type(struct gsm_bts *bts, enum gsm_chan_t type); |