[{"name":"SP-180283","title":"Draft TR 26.959 Study on enhanced Voice over LTE (VoLTE) performance (Release 15) v. 2.0.0 (FS_eVoLP)","source":"SA WG4","contact":"Paolino Usai","contact-id":3209,"tdoctype":"draft TR","for":"Approval","abstract":"Abstract of document: The TR 26.959 provides a study on the Enhanced VoLTE Performance (eVoLP) in SA WG4. The TR includes example mechanisms to indicate at setup a terminal's ability to send adaptation triggers, e.g., to adapt to the most robust codec mode and using application layer redundancy. Additionally, the TR recommends example maximum end-to-end packet loss rate (Max. PLR) and the associated robustness parameter that indicates the terminal's ability to handle packet losses, thereby avoiding or delaying SRVCC to provide enhanced VoLTE performance. The report also includes study on the impact of jitter buffer management (JBM) and packet loss concealment (PLC) on handover thresholds.  Changes since last presentation to SA Meeting #80: - Updated maximum packet loss rate (PLR) operating points for speech codecs - Studied the static and dynamic allocation of uplink Max. PLR and downlink Max. PLR - Updated with Conclusions  Outstanding Issues: None  Contentious Issues: None.","secretary_remarks":"Approved","agenda_item_sort_order":179,"ainumber":"17D.8","ainame":"(FS_eVoLP) -  S4 aspects of FS_eVoLP","tdoc_agenda_sort_order":12820,"status":"approved","reservation_date":"2018-05-08 09:05:17","uploaded":"2018-05-28 09:00:23","revisionof":"","revisedto":"","release":"Rel-15","crspec":26.959,"crspecversion":"2.0.0","workitem":[{"winame":"FS_eVoLP"}],"crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"","Cc":"","lsoriginalls":"","lsreply":"","link":"http:\/\/www.3gpp.org\/ftp\/tsg_sa\/TSG_SA\/TSGS_80\/Docs\/SP-180283.zip","group":"SP","meeting":"SP-80","year":2018,"uicc_affected":null,"me_affected":null,"ran_affected":null,"cn_affected":null,"clauses_affected":null,"crsinpack":null,"crsinpacknumber":0}]