[{"name":"S2-180026","title":"LS from CT WG1: LS on session management congestion control","source":"CT WG1","contact":"Yanchao Kang","contact-id":72631,"tdoctype":"LS in","for":"Action","abstract":"CT WG1 has discussed the DNN based congestion control and S-NSSAI based congestion control. CT WG1 would like SA WG2 to answer the following questions: CT WG1 has noticed that the DNN based congestion control is very similar to the APN based congestion control in EPS system. Question 1: Shall the UE run the same timer for DNN based congestion control in 5GS and APN based congestion control in EPS? If yes, shall the UE keep the timer running upon inter-system change? Question 2: Can a network with slicing also apply DNN based congestion control, or will such network apply only S-NSSAI based congestion control? If a network with slicing can also apply DNN based congestion control, how does the SMF determine whether a DNN is congested for a UE when the UE has PDU sessions to that DNN via multiple slices? If a network with slicing can also apply DNN-based congestion control, please consider the following scenario: The UE attempts to establish a PDU session X with S-NSSAI#1 and a DNN#1 comb","secretary_remarks":"Responses drafted in S2-180238 and S2-180538. Final response in S2-181263","agenda_item_sort_order":19,"ainumber":"6.5.2","ainame":"Common Access Control, RM and CM functions and procedure flows","tdoc_agenda_sort_order":12370,"status":"replied to","reservation_date":"2017-12-19 11:54:35","uploaded":"2017-12-19 11:58:34","revisionof":"","revisedto":"","release":"Rel-15","crspec":"","crspecversion":"","workitem":"","crnumber":"","crrevision":"","crcategory":"","tsg_crp":"","lsreplyto":"","lsto":"SA WG2","Cc":"","lsoriginalls":"C1-175379","lsreply":"S2-181263","link":"http:\/\/www.3gpp.org\/ftp\/tsg_sa\/WG2_Arch\/TSGS2_125_Gothenburg\/Docs\/S2-180026.zip","group":"S2","meeting":"S2-125","year":2018,"uicc_affected":null,"me_affected":null,"ran_affected":null,"cn_affected":null,"clauses_affected":null,"crsinpack":null,"crsinpacknumber":0}]