From: gitosis@osmocom.org Precedence: list To: osmocom-commitlog@lists.osmocom.org Date: Thu, 20 Jun 2013 12:41:52 GMT Message-ID: <201306201241.r5KCfqUP079409@git.osmocom.org> Subject: openbsc.git branch jolly/new_handover created. 0.13.0-93-g0b4d460 Message: 5 This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "The OpenBSC GSM Base Station Controller (+MSC/HLR/SGSN)". The branch, jolly/new_handover has been created at 0b4d460985133bfc501a0fc7658f269fc126c0d9 (commit) - Log ----------------------------------------------------------------- http://cgit.osmocom.org/openbsc/commit/?id=0b4d460985133bfc501a0fc7658f269fc126c0d9 commit 0b4d460985133bfc501a0fc7658f269fc126c0d9 Author: Andreas Eversberg Date: Thu Jun 13 11:46:16 2013 +0200 Handover test function http://cgit.osmocom.org/openbsc/commit/?id=69f60c575cb05332d5461dcb127d5ea151c4efd0 commit 69f60c575cb05332d5461dcb127d5ea151c4efd0 Author: Andreas Eversberg Date: Thu Jun 13 11:41:37 2013 +0200 HO: New improved handover algorithm The handover algorithm selects the best cell, tries to solve congestion of cells and forces handover in case of bad radio link: Handover shall ensure that the mobile station is always on the best cell during a call. This results in best speech quality and allows a lower TX level (up-link) to save battery and reduce interference. Sometimes this is not desirable, especially if a cell with large coverage becomes congested after handover. In this situation it makes sense to balance the usage between cells to prevent congestion. If a cell is congested, one or several mobile stations need to be handovered to a different cell, even if that cell is not the best cell for these mobile station. In case that a mobile station needs to handover to prevent a loss of radio link, it makes sense to handover it to a cell that is congested afterwards. In this situation, a different mobile station on the congested target cell can be handovered to a non-congested neighbor cell, to solve or balance the congestion. Because congestion of TCH/F and TCH/H is handled individually or bad quality might require change from TCH/H to TCH/F, assignment instead of handover might be used to change the channel within the same BTS. This new algorithm handles both assigment and handover depending on the target BTS. http://cgit.osmocom.org/openbsc/commit/?id=f3b0e9616756fe34033000bb9059bac47caf9b6c commit f3b0e9616756fe34033000bb9059bac47caf9b6c Author: Andreas Eversberg Date: Mon Jun 17 11:58:30 2013 +0200 Add a queue to bsc_api to queue DTAP messages during handover/assignment http://cgit.osmocom.org/openbsc/commit/?id=6aa2dd55e3e9b6d19346a03128ae9aa81490844c commit 6aa2dd55e3e9b6d19346a03128ae9aa81490844c Author: Andreas Eversberg Date: Thu Jun 13 09:59:18 2013 +0200 Fix assignment failure handling at bsc_api.c If assignment fails, we must check if the secondary lchan has been released already. This can happen if the BTS indicates a CHANNEL FAILURE INDICATION, then the BSC already released the secondary lchan. http://cgit.osmocom.org/openbsc/commit/?id=c34b9d1bf15e4d9919c84b333a1006b13ace5ae8 commit c34b9d1bf15e4d9919c84b333a1006b13ace5ae8 Author: Andreas Eversberg Date: Thu Jun 13 09:44:27 2013 +0200 Debug messages show which unsupported codecs are removed from bcap and why http://cgit.osmocom.org/openbsc/commit/?id=443b68cdc19908707e1467e08c4a03cbf1af806d commit 443b68cdc19908707e1467e08c4a03cbf1af806d Author: Andreas Eversberg Date: Wed Jun 12 08:42:19 2013 +0200 HO: Improve silent call feature Since we use late assignment now, we must assign requested channel after paging response. http://cgit.osmocom.org/openbsc/commit/?id=5c8fc8205f6ec10b9b5a9b5b97dd8cd16a43155c commit 5c8fc8205f6ec10b9b5a9b5b97dd8cd16a43155c Author: Andreas Eversberg Date: Wed Jun 12 08:39:32 2013 +0200 HO: Allow assignment trigger via VTY command If handover is triggered without a BTS given, the handover logic will use assignment instead of handover. http://cgit.osmocom.org/openbsc/commit/?id=c33e10693ee73baeb52fd519863c6b0922c2bdec commit c33e10693ee73baeb52fd519863c6b0922c2bdec Author: Andreas Eversberg Date: Wed Jun 12 08:30:53 2013 +0200 Correctly set T3105 for ipaccess BTS type The given value is 10 * ms, so 13 is used instead of 128. If T3105 is set at config to something greater 0, it is used instead of the default value. http://cgit.osmocom.org/openbsc/commit/?id=9a9bb37f1f3bef8f82735a8736303aaadb9b0fd8 commit 9a9bb37f1f3bef8f82735a8736303aaadb9b0fd8 Author: Andreas Eversberg Date: Wed Jun 12 08:26:50 2013 +0200 Allow assignment to TCH channel with signalling only mode This makes sense, if silent call is used. Assignment allows to change from SDCCH (or whatever was available) to given TCH rate. http://cgit.osmocom.org/openbsc/commit/?id=c973e5ae757901200bbc5be4f92fae207304a60b commit c973e5ae757901200bbc5be4f92fae207304a60b Author: Andreas Eversberg Date: Wed Jun 12 08:20:36 2013 +0200 Do not perform assignment, if the new channel equals the current one This can happen, if a TCH/H was requested, but because it is not available, a TCH/F is allocated. If the old channel was TCH/F already, it makes no sense to assign it. http://cgit.osmocom.org/openbsc/commit/?id=31cdecbb340382efc051049c0fe984e5aeaf76a5 commit 31cdecbb340382efc051049c0fe984e5aeaf76a5 Author: Andreas Eversberg Date: Tue Jun 4 16:31:18 2013 +0200 HO: Add handover decision debugging category http://cgit.osmocom.org/openbsc/commit/?id=1d4ad1a656635c44e337cda48f9e199936d428c7 commit 1d4ad1a656635c44e337cda48f9e199936d428c7 Author: Andreas Eversberg Date: Mon Jun 3 18:46:41 2013 +0200 HO: In case of assignment failure, release all call control transactions If the initial assignment to the TCH channel fails, the call is released and the MNCC application receives cause 41 (Temporary Failure). http://cgit.osmocom.org/openbsc/commit/?id=caac7a787a76a91ea12c59ee6690ccb1e1ba9118 commit caac7a787a76a91ea12c59ee6690ccb1e1ba9118 Author: Andreas Eversberg Date: Sun Jun 2 20:46:32 2013 +0200 HO: If handover logic is used to do assignment, signal assignment result http://cgit.osmocom.org/openbsc/commit/?id=2e6c473b8b91ca9674a85c2f2c69f9b4c7a22755 commit 2e6c473b8b91ca9674a85c2f2c69f9b4c7a22755 Author: Andreas Eversberg Date: Sun Jun 2 20:43:57 2013 +0200 HO: Always update rqd_ta after receiving measurement report The up-to-date rqd_ta is required for assignment command. If the phone moves, the timing advance might change. The rqd_ta will be updated by each measurement report. http://cgit.osmocom.org/openbsc/commit/?id=1fc4177b021bb0e93d182d593760238fc4229fa2 commit 1fc4177b021bb0e93d182d593760238fc4229fa2 Author: Andreas Eversberg Date: Sun Jun 2 10:36:53 2013 +0200 HO: Changed availablilty of ts_is_usable() from static to extern http://cgit.osmocom.org/openbsc/commit/?id=4f5224e55de3f300e145c8b49d32a6ea9717ef2a commit 4f5224e55de3f300e145c8b49d32a6ea9717ef2a Author: Andreas Eversberg Date: Sat Jun 1 17:00:59 2013 +0200 HO: Count neighbor measurements and reduce window of neigh_meas_avg Always start with a counter of 0 for a new measurement report. If the neigh_meas_avg is caluclated over the given window, the window is reduced, if there are less measurement reports received so far. http://cgit.osmocom.org/openbsc/commit/?id=379cd5cbe7f19b2bd8e7a703c60d711f962d4f5f commit 379cd5cbe7f19b2bd8e7a703c60d711f962d4f5f Author: Andreas Eversberg Date: Sat Jun 1 16:46:39 2013 +0200 HO: Count the actual meas.rep. get_meas_rep_avg fails if not reached get_meas_rep_avg will return -EINVAL, if the required number of measurements are not reached. There will be no handover possible until the given number of measurements are available. http://cgit.osmocom.org/openbsc/commit/?id=bf753d73592afe53436d425a31f98e19cc973a30 commit bf753d73592afe53436d425a31f98e19cc973a30 Author: Andreas Eversberg Date: Sat Jun 1 07:03:14 2013 +0200 Fix of checking TCH rate at chan_compat_with_mode In case of current channel equals TCH/F and we request half rate, we must return 0, so the calling function will trigger assignment. http://cgit.osmocom.org/openbsc/commit/?id=29de4e01a1242877f69a10938ec82cd8bedb0d20 commit 29de4e01a1242877f69a10938ec82cd8bedb0d20 Author: Andreas Eversberg Date: Fri May 31 18:12:35 2013 +0200 HO: Bultin MNCC application ignores lchan_type and uses selected codec The lchan_type depends on selected codec, but in case of AMR, this can be any lchan_type (TCH/F or TCH/H). The actual rate of both peers are not relevant for ARM, because voice data is compatible.(*) *: The rates must match. This is not yet considered. http://cgit.osmocom.org/openbsc/commit/?id=b03023b6f82e66a80852434a9e31b9501db3b0d4 commit b03023b6f82e66a80852434a9e31b9501db3b0d4 Author: Andreas Eversberg Date: Fri May 31 18:07:17 2013 +0200 HO: MNCC interface uses lchan_mode and lchan_type to modify channel The MNCC application must provide the lchan_type with the lchan_mode, since FR and HR codec depends on given lchan_type. In case of AMR, the lchan_type is ignored and an available channel type is selected. In case of EFR, the given lchan_type (must be full rate) is used. http://cgit.osmocom.org/openbsc/commit/?id=1cc5782019b831670364d56e843769f41de5bb47 commit 1cc5782019b831670364d56e843769f41de5bb47 Author: Andreas Eversberg Date: Fri May 31 15:15:05 2013 +0200 HO: Remove all TCH rates from bearer capability that are not available When the MNCC application negotiates the codec, it must be sure that the TCH rates of the neotiation results can be assigned to the MS. Therefore not only the codecs that are unsupported by BTS are removed, but also the codecs that require channels that are not available. http://cgit.osmocom.org/openbsc/commit/?id=bcc3fb0307cf45794c698f95381f35853c53dbda commit bcc3fb0307cf45794c698f95381f35853c53dbda Author: Andreas Eversberg Date: Fri May 31 15:05:52 2013 +0200 HO: Assign SDCCH on channel request This is needed, so channel can be negotiated before the actual channel type is assigned. In case there is no SDCCH available, try to assign what ever the MS requested. If this is not possible try to assign TCH/F. If this is still not possible, reject channel request. http://cgit.osmocom.org/openbsc/commit/?id=5935834c04b895e09d8bb2a38c460d92326cef23 commit 5935834c04b895e09d8bb2a38c460d92326cef23 Author: Andreas Eversberg Date: Thu May 30 14:49:30 2013 +0200 HO: Store bearer capabilities of MS at connection structure for later use Handover might require change in codec, especially when switching between AFS (AMR on TCH/F) and AHS (AMR on TCH/H). In this case the handover decision must know if a different target rate is supported by the MS or not. http://cgit.osmocom.org/openbsc/commit/?id=d404c7ee0cfb13efcddaaf651b565e3fc7fce8ec commit d404c7ee0cfb13efcddaaf651b565e3fc7fce8ec Author: Andreas Eversberg Date: Thu May 30 14:12:48 2013 +0200 HO: Add a penalty timer list to the subscriber connection entity This penalty timer is used to temporarily block cells where handover or assignment failed or where handover is not allowed. This is usefull to prevent repeated handover attempts to broken cells or cells that have limited allowed distance. http://cgit.osmocom.org/openbsc/commit/?id=60ea4140720156699eb3522e009ee4878f56297c commit 60ea4140720156699eb3522e009ee4878f56297c Author: Andreas Eversberg Date: Thu May 30 13:40:18 2013 +0200 HO: Add new configuration parameters to VTY and data structure of BTS http://cgit.osmocom.org/openbsc/commit/?id=c06430c60a8fa84c34d313f416c559d7605283d9 commit c06430c60a8fa84c34d313f416c559d7605283d9 Author: Andreas Eversberg Date: Thu May 30 11:31:40 2013 +0200 HO: Move handover config from GSMNET to BTS node This is required for individual BTS configuration. http://cgit.osmocom.org/openbsc/commit/?id=946c33a1919ddc7cc64e5302926477d3c326eb3e commit 946c33a1919ddc7cc64e5302926477d3c326eb3e Author: Andreas Eversberg Date: Thu May 30 11:14:31 2013 +0200 HO: Add function to count currently ongoing handovers to a given BTS In order to keep processing power at BTS at a defined level, the handover decision might want to limit maximum number of slots that require RACH detection. http://cgit.osmocom.org/openbsc/commit/?id=f9b52ad85a8fb39301d13d5bb25c8e64a6f203d9 commit f9b52ad85a8fb39301d13d5bb25c8e64a6f203d9 Author: Andreas Eversberg Date: Thu May 30 10:29:36 2013 +0200 HO: Count number of free timeslot on a given BTS This is needed for handover algorithm to balance free slots and to prevent congestion of one cell, while other cells still have free capacities. http://cgit.osmocom.org/openbsc/commit/?id=854b09a9270bb1e40b9b7efe6d8294bb0b0bae6c commit 854b09a9270bb1e40b9b7efe6d8294bb0b0bae6c Author: Andreas Eversberg Date: Thu May 30 09:57:55 2013 +0200 HO: Send Channel Mode and Multirate IE along with handover command This is needed, if the channel mode should change when doing handover. A change in channel mode makes sense, if available resources at the new BTS are different. http://cgit.osmocom.org/openbsc/commit/?id=333edb5b85f24d2fc7bb6980f42adb5f9c71be55 commit 333edb5b85f24d2fc7bb6980f42adb5f9c71be55 Author: Andreas Eversberg Date: Sat Jun 8 12:51:47 2013 +0200 HO: Return "unknown", if subscriber is not set at subscr_name() This makes things easier when doing tests with fake BTS and fake lchans. There is no need to create any subscriber to test the handover process. http://cgit.osmocom.org/openbsc/commit/?id=e98498d8eff7f0e0f832f65205aee4ef3a7f7fd9 commit e98498d8eff7f0e0f832f65205aee4ef3a7f7fd9 Author: Andreas Eversberg Date: Sun Mar 31 12:03:12 2013 +0200 Allow handling of TCH/F and TCH/H frames from layer 4 http://cgit.osmocom.org/openbsc/commit/?id=bfff269373ea926a224490d4d5ddff7a74d810be commit bfff269373ea926a224490d4d5ddff7a74d810be Author: Andreas Eversberg Date: Sun Mar 31 12:01:25 2013 +0200 osmo-nitb support for codec negotiation Since codec negotiation is done automatically, there is no need to define codec for TCH/F and TCH/H via VTY anymore. http://cgit.osmocom.org/openbsc/commit/?id=9bb1cc53b2677f17896e5886d4957735d7ea5e13 commit 9bb1cc53b2677f17896e5886d4957735d7ea5e13 Author: Andreas Eversberg Date: Sun Mar 31 11:57:38 2013 +0200 If requested TCH/H channel is not available, try assigning TCH/F If MNCC application requests a half rate channel, the channel might not be available, due to different cell configuration, so the full rate channel is used. http://cgit.osmocom.org/openbsc/commit/?id=c4390abfd6f2cf2e1f612b3e41ca659f3c417044 commit c4390abfd6f2cf2e1f612b3e41ca659f3c417044 Author: Andreas Eversberg Date: Sun Mar 31 11:50:35 2013 +0200 Fix: If half rate channel is used, indicate hr when modifying channel mode http://cgit.osmocom.org/openbsc/commit/?id=832e769139cd4ad5d1255771469e2f354c34624b commit 832e769139cd4ad5d1255771469e2f354c34624b Author: Andreas Eversberg Date: Sun Mar 31 11:44:34 2013 +0200 Fix: If paging for half rate was requested, use hr, if supported by MS http://cgit.osmocom.org/openbsc/commit/?id=5fb3187e72228e1562ab78260686d9a713e2d630 commit 5fb3187e72228e1562ab78260686d9a713e2d630 Author: Andreas Eversberg Date: Tue Mar 26 08:21:46 2013 +0100 Fixed AMR payload type selection and handling http://cgit.osmocom.org/openbsc/commit/?id=f8042f3a25a4b254c214a8a73a9d04f0822fc372 commit f8042f3a25a4b254c214a8a73a9d04f0822fc372 Author: Andreas Eversberg Date: Tue Mar 26 08:20:43 2013 +0100 Add full AMR multirate IE support with VTY config for MS and BTS side http://cgit.osmocom.org/openbsc/commit/?id=b7fadfeb71552f6502e6a4be1f4fb3ab7dbf626c commit b7fadfeb71552f6502e6a4be1f4fb3ab7dbf626c Author: Andreas Eversberg Date: Thu Mar 14 09:41:18 2013 +0100 Drop bad speech frames rather than forwarding them via RTP Some RTP endpoints may not check for bad frame indications, so a frame that is marked as bad may be still decoded, which creates anoying noise. This patch drops these frames. It depends on the SIP endpoint how these dropped frames are handled. (insert silence, extrapolate speech...) http://cgit.osmocom.org/openbsc/commit/?id=e03997fc7a658d08b341148990308f2c5cfbd1db commit e03997fc7a658d08b341148990308f2c5cfbd1db Author: Andreas Eversberg Date: Mon Mar 11 08:20:48 2013 +0100 Add check for non existing lchan at tch_frame_down() Traffic cannot sent to BTS, if there is (currently) no logical channel associated with the transaction. http://cgit.osmocom.org/openbsc/commit/?id=107cd450f0afec568fc3b2ee413e821ecb2f6bd7 commit 107cd450f0afec568fc3b2ee413e821ecb2f6bd7 Author: Andreas Eversberg Date: Mon Mar 11 08:12:43 2013 +0100 Use helper function to check is an MNCC frame is data (speech/traffic) http://cgit.osmocom.org/openbsc/commit/?id=30651a10bbc0a8d4e22f12e6930cfa093cb6266a commit 30651a10bbc0a8d4e22f12e6930cfa093cb6266a Author: Andreas Eversberg Date: Sun Mar 10 11:50:19 2013 +0100 Send RADIO LINK TIMEOUT value via OML attribute to BTS The same radio link timeout value is used for BTS and MS side. http://cgit.osmocom.org/openbsc/commit/?id=7ff3e688f93d177f1ee2dc3a1089c7eaf2eac198 commit 7ff3e688f93d177f1ee2dc3a1089c7eaf2eac198 Author: Andreas Eversberg Date: Sun Mar 10 11:49:35 2013 +0100 Add option to set RADIO LINK TIMEOUT value via VTY http://cgit.osmocom.org/openbsc/commit/?id=2cf4582bdea7eaf336bf8a6226ec5f97cb6e24d7 commit 2cf4582bdea7eaf336bf8a6226ec5f97cb6e24d7 Author: Andreas Eversberg Date: Sun Mar 10 09:45:26 2013 +0100 Each BTS can be configured for speech support (other than GSM full rate) Speech codings which are not supported by BTS will be removed from the bearer capability information element after parsing. This way it is not required for the MNCC application to consider support of each BTS. Only GSM full rate is supported by default. http://cgit.osmocom.org/openbsc/commit/?id=df16018011db9d1d8ca2f67ecb343f00f6491307 commit df16018011db9d1d8ca2f67ecb343f00f6491307 Author: Andreas Eversberg Date: Tue Feb 19 12:55:59 2013 +0100 Fix: TCHH/HR payloads are 15 bytes (ToC + 14 bytes of speech data) http://cgit.osmocom.org/openbsc/commit/?id=8411089fab1f26f233062c05f7efa20d45df2369 commit 8411089fab1f26f233062c05f7efa20d45df2369 Author: Andreas Eversberg Date: Fri Mar 16 08:14:23 2012 +0100 Fixed problem of mute audio on some calls When reading from RTP socket, the first read() may fail right after connecting to remote socket. Subsequent read() will work as it should. I have not checked why this read fails, but I don't see any reason why we should stop reading, just because one read() fails at the beginning. http://cgit.osmocom.org/openbsc/commit/?id=75abba99e4ce84b9f729ec22d93d83290ebc435c commit 75abba99e4ce84b9f729ec22d93d83290ebc435c Author: Andreas Eversberg Date: Thu Mar 8 14:39:19 2012 +0100 Finished support for all codecs (RTP bridge and MNCC interface) The codes is not yet tested. AMR rate is currently fixed to 5.9k. http://cgit.osmocom.org/openbsc/commit/?id=9a7987989b870758f2de2c7bc4406bc1ba12bafe commit 9a7987989b870758f2de2c7bc4406bc1ba12bafe Author: Andreas Eversberg Date: Thu Mar 8 11:08:37 2012 +0100 Fixed delay problems, if RTP stream jitters too much The RTP stream is generated or forwarded by OpenBSC to nanoBTS. Due to switching of streams (hold/retrieve call), packet loss or even stalling of sender's process, the time stamp must be corrected. If outdated packets are received, they get dropped. http://cgit.osmocom.org/openbsc/commit/?id=1e3964ac8a5993d42800e3e375a1dd31b29dd2fc commit 1e3964ac8a5993d42800e3e375a1dd31b29dd2fc Author: Andreas Eversberg Date: Fri Feb 17 15:20:59 2012 +0100 Allow dynamic RTP payload types between application and MNCC interface Since EFR/AMR/HR codecs use dynamic RTP payload, the payload type can be set. If it is set, the frame type must be set also, so OpenBSC knows what frame types are received via RTP. This modification only affects traffic beween application and MNCC interface, not the RTP traffic between OpenBSC and BTS. http://cgit.osmocom.org/openbsc/commit/?id=4cdda0e1f33ffa57f63dd79beb5c51e8c2c28ab3 commit 4cdda0e1f33ffa57f63dd79beb5c51e8c2c28ab3 Author: Andreas Eversberg Date: Fri Jan 20 20:33:37 2012 +0100 Adding handling of BFI (Bad Frame Indicatior) of received TRAU frames If a bad TRAU frame is received, it is forwarded to MNCC application as GSM_TCHF_BAD_FRAME. The application can now handle the GAP of missing audio. (e.g. with extrapolation) If TRAU frames are forwarded via RTP, bad frames are dropped, but frame counter and timestamp of RTP sender state is increased. http://cgit.osmocom.org/openbsc/commit/?id=1fdb5eb40a445bf9da627b59e492766f3aca5f9f commit 1fdb5eb40a445bf9da627b59e492766f3aca5f9f Author: Andreas Eversberg Date: Mon Jan 16 09:29:28 2012 +0100 Adding traffic forwarding via RTP to remote application Instead of forwarding traffic through MNCC interface, traffic can now be forwarded to a given RTP destination. A special MNCC message is used for that. The traffic can still be forwarded through MNCC interface when this special MNCC message is not used. It also works with E1 based BTSs. In conjunction with LCR's "rtp-bridge" feature, the RTP traffic can be directly exchanged with a remote SIP endpoint, so that the traffic is not forwarded by LCR itself. This way the performance of handling traffic only depends on OpenBSC and the remote SIP endpoint. Also the traffic is exchanged with the SIP endpoint without transcoding, to have maximum performance. http://cgit.osmocom.org/openbsc/commit/?id=9ac936a2800d42babb69abbf13ad1e653f97d712 commit 9ac936a2800d42babb69abbf13ad1e653f97d712 Author: Andreas Eversberg Date: Thu Mar 7 15:25:48 2013 +0100 Fix of several compiler warnings ----------------------------------------------------------------------- hooks/post-receive -- The OpenBSC GSM Base Station Controller (+MSC/HLR/SGSN)