LTE Idle Mode Procedure Rel8 Sung Min Lee

LTE Idle Mode Procedure (Rel-8) Sung. Min Lee (smatvt@lge. com) Click to to edit Master subtitle style July 30, 2009 Copyright Notification . No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. ⓒ 2009. LG 3 GPP RAN 2 team. All rights reserved. LG Electronics RAN 2 Team

Purpose of Camping on a Cell in IDLE mode Reception of System Information Reception of paging Initiate Connection Request Reception of ETWS Copyright All Rights Reserved Oh I see I am cell A This is my information SIB Ok Let me Change to Connected mode Paging Someone wants to talk to you Connection Request I want to talk to someone Connection Request Oh No…. 2 / 13 ETWS Oh ok Let me see what I can do Tsunami is coming!!!!!! LG Electronics RAN 2 Team

Paging DRX Cycle Subframe B I will send paging message at subframe B Paging Record List P-RNTI OK I will wake up at subframe B PDCCH Copyright All Rights Reserved 3 / 13 Paging Record UE Identity ETWS Indication SI Mod. Info PDSCH LG Electronics RAN 2 Team

Service Types Suitable Cell Acceptable Cell Reserved Cell Copyright All Rights Reserved Normal Service Public use Limited Service ETWS Message Emergency Call Operator Service Operator use 4 / 13 LG Electronics RAN 2 Team

After power on PLMN List OK! I see you System Information Paging ETWS notification PLMN A PLMN B POWER ON PLMN A PLMN B PLMN Selection Ph 1 Ph 2 R 96 R 97 R 98 Copyright All Rights Reserved I am here! Location Registration Cell selection R 4 R 5 R 6 5 / 13 R 7 R 10 LG Electronics RAN 2 Team

Cell Selection 3 rd 2 nd 1 st Camping on Cell B Evaluation Scanning Result Cell A Cell B Cell C Suitable Cell Acceptable Cell Radio Quality Cell A Cell B Reserved Cell B Cell C Cell A Copyright All Rights Reserved 6 / 13 LG Electronics RAN 2 Team

After Camping on Ranking Priority Frequency 1 Priority : 5 Frequency 2 Priority : 3 Cell A Cell C Cell B Frequency 3 Priority : 1 OK! I see you Cell E Cell D Cell F I am here! Cell A Cell B Cell C R 5 Cell. R 4 reselection Copyright All Rights Reserved 7 / 13 R 6 R 7 Location R 10 Registration LG Electronics RAN 2 Team

Cell reselection Intra Frequency & Inter Frequency with equal priority Serving Cell Neighbor Cell Inter Frequency and Inter-RAT Threshold : 3 Threshold : 2 Priority : 5 Radio. Quality : 4 Neighbor Cell Threshold : 2 Neighbor Cell Serving Cell Copyright Priority : 3 Radio. Quality : 5 All Rights Reserved Priority : 5: 5 Radio. Quality : 5: 1 8 / 13 Priority : 3: 3 Priority Radio. Quality : Radio. Quality 3: 1 LG Electronics RAN 2 Team

Overall State transitions in idle mode Acceptable cell found Any Cell Selection Location Registration Fails No suitable cell found Initial Cell Selection Camped on Any Cell Suitable cell found Camped normally Suitable cell found No suitable cell found New PLMN is selected Copyright Stored Information Cell Selection All Rights Reserved 9 / 13 LG Electronics RAN 2 Team

Overall State transitions in idle mode Acceptable cell found Camped on Any Cell Selection Trigger Suitable cell found Camped normally No Acceptable cell found Cell Reselection Location Registration Fails No suitable cell found Initial Cell Selection No suitable cell found Trigger Acceptable cell found Cell Reselection Suitable cell found No suitable cell found New PLMN is selected Copyright Stored Information Cell Selection All Rights Reserved 10 / 13 LG Electronics RAN 2 Team

Overall State transitions in idle mode Camped normally Leaving Idle Connected Mode Return to Idle Suitable cell found Cell selection 1. Recently connected cell 2. Stored information 3. Initial Cell Selection Suitable cell found Camped on Any Cell Leaving Idle Connected Mode (Emergency call only) Return to Idle No Suitable cell found Cell selection Acceptable cell found No Acceptable cell found Copyright All Rights Reserved 11 / 13 Any Cell Selection LG Electronics RAN 2 Team

Etc. (Mobility State, Access Restriction) Cell B is good, so start Timer for Time Interval Cell D Cell C Cell B Cell A Time Interval condition is not met, so cannot select cell B Decrease Time Interval Detection of High or Middle mobility state Cannot (Re)Select this cell Regular User Cannot (Re)Select this cell Treated as barred I am barred cell R 6 R 7 I am reserved cell R 8 R 9 R 10 Operator Can (Re)Select this cell Copyright All Rights Reserved 12 / 13 LG Electronics RAN 2 Team

Thank You!! Authorized by LG Electronics 3 GPP RAN 2 Team Copyright All Rights Reserved 13 / 13 LG Electronics RAN 2 Team