3GPP TSG-RAN WG2 meeting #101
`
`Athens, Greece, 26 February - 2 March, 2018
`
`R2-1801702
`
`Agenda Item:
`
`2.2
`
`Source:
`
`ETSI MCC
`
`Title:
`
`Report of 3GPP TSG RAN2#AH-1801 meeting, Vancouver, Canada
`
`Document for: Approval
`
`Report of 3GPP TSG RAN WG2 meeting #AH-1801
`Vancouver, Canada
`22 - 26 January, 2018
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`Draft Report of 3GPP TSG RAN2#97, Athens. Greece, 13 - 17.02, 2017
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`3GPP
`
`Postal address
`
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`3GPP support office address
`650 Route des Lucioles - Sophia Antipolis
`Valbonne - FRANCE
`Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
`
`Internet
`http://www.3gpp.org
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`
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`© 2018, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC).
`All rights reserved.
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`Draft Report of 3GPP TSG RAN2#97, Athens. Greece, 13 - 17.02, 2017
`
`Contents
`
`Organisation of the meeting ............................................................................................................................... 6
`
`Statistics/Executive Summary ............................................................................................................................ 6
`
`1
`1.1
`1.2
`1.3
`
`2
`2.1
`2.2
`2.3
`2.4
`
`Opening of the meeting (9 AM) ............................................................................................................... 7
`Call for IPR ........................................................................................................................................................ 7
`Network usage conditions .................................................................................................................................. 7
`Other .................................................................................................................................................................. 7
`
`General ..................................................................................................................................................... 8
`Approval of the agenda ...................................................................................................................................... 8
`Approval of the report of the previous meeting ................................................................................................. 8
`Reporting from other meetings .......................................................................................................................... 8
`Others ................................................................................................................................................................. 9
`
`3-9 Void .......................................................................................................................................................... 9
`
`10 WI: New Radio (NR) Access Technology ............................................................................................... 9
`10.1
`Organisational .................................................................................................................................................. 10
`10.2
`Stage 2 and common UP/CP aspects ............................................................................................................... 14
`10.2.1
`Stage 2 TSs and running CR ...................................................................................................................... 14
`10.2.2
`Stage 2 corrections for EN-DC .................................................................................................................. 15
`10.2.2.1
`User plane ............................................................................................................................................. 15
`10.2.2.2
`Other ..................................................................................................................................................... 18
`10.2.3
`Stage 2 corrections for non EN-DC ........................................................................................................... 18
`10.2.4
`Mobility mechanisms - basic handover ...................................................................................................... 19
`10.2.5
`Bandwidth parts ......................................................................................................................................... 20
`10.2.6
`Supplementary uplink ................................................................................................................................ 22
`10.2.7
`Mobility mechanisms - other ...................................................................................................................... 22
`10.2.8
`Mobility - RLM,RLF.................................................................................................................................. 24
`10.2.9
`Mobility - Inter-RAT .................................................................................................................................. 24
`10.2.10
`Security (non EN-DC) ................................................................................................................................ 24
`10.2.11
`Slicing ........................................................................................................................................................ 25
`10.2.12
`QoS............................................................................................................................................................. 26
`10.2.13
`Positioning ................................................................................................................................................. 28
`10.2.14
`Other........................................................................................................................................................... 28
`10.3
`Stage 3 user plane ............................................................................................................................................ 30
`10.3.1
`MAC........................................................................................................................................................... 30
`10.3.1.1
`TS ......................................................................................................................................................... 30
`10.3.1.2
`MAC general aspects ............................................................................................................................ 31
`10.3.1.3
`MAC PDU format ................................................................................................................................ 34
`10.3.1.4
`Random access ..................................................................................................................................... 36
`10.3.1.4.1
`Differentiation of RA parameters.................................................................................................... 36
`10.3.1.4.2
`Random access in presence of multi-beam operation ..................................................................... 37
`10.3.1.4.3
`Random access procedures ............................................................................................................. 41
`10.3.1.5
`SR ......................................................................................................................................................... 44
`10.3.1.6
`BSR ...................................................................................................................................................... 45
`10.3.1.7
`LCP ....................................................................................................................................................... 47
`10.3.1.8
`SPS/Grant-free ...................................................................................................................................... 49
`10.3.1.9
`HARQ ................................................................................................................................................... 53
`10.3.1.10
`DRX...................................................................................................................................................... 53
`10.3.1.11
`Impact of PDCP duplication on MAC .................................................................................................. 56
`10.3.1.12
`PHR ...................................................................................................................................................... 57
`10.3.1.13
`Other ..................................................................................................................................................... 58
`10.3.2
`RLC ............................................................................................................................................................ 59
`10.3.2.1
`TS ......................................................................................................................................................... 59
`10.3.2.2
`RLC header format ............................................................................................................................... 60
`10.3.2.3
`Impact of PDCP duplication to RLC .................................................................................................... 60
`10.3.2.4
`Other ..................................................................................................................................................... 61
`10.3.3
`PDCP .......................................................................................................................................................... 62
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`Draft Report of 3GPP TSG RAN2#97, Athens. Greece, 13 - 17.02, 2017
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`10.3.3.1
`10.3.3.2
`10.3.3.5
`10.3.3.7
`10.3.4
`10.3.4.1
`10.3.4.2
`10.3.4.3
`10.3.4.4
`10.3.5
`10.4
`10.4.1
`10.4.1.1
`10.4.1.2
`10.4.1.3
`10.4.1.3.1
`10.4.1.3.2
`10.4.1.3.3
`10.4.1.3.4
`10.4.1.3.5
`10.4.1.4
`10.4.1.4.1
`10.4.1.4.2
`10.4.1.4.3
`10.4.1.4.4
`10.4.1.4.5
`10.4.1.4.6
`10.4.1.5
`10.4.1.5.1
`10.4.1.5.2
`10.4.1.5.3
`10.4.1.6
`10.4.1.6.1
`10.4.1.6.2
`10.4.1.6.3
`10.4.1.6.4
`10.4.1.6.5
`10.4.1.6.6
`10.4.1.7
`10.4.1.7.1
`10.4.1.7.2
`10.4.1.7.3
`10.4.1.7.4
`10.4.1.7.5
`10.4.1.7.6
`10.4.1.8
`10.4.1.8.1
`10.4.1.8.2
`10.4.1.9
`10.4.1.9.1
`10.4.1.10
`10.4.2
`10.4.2.1
`10.4.2.2
`10.4.2.3
`10.4.3
`10.4.3.1
`10.4.3.2
`10.4.3.3
`10.4.3.4
`10.4.4
`10.4.4.1
`
`TS ......................................................................................................................................................... 62
`PDCP PDU formats .............................................................................................................................. 62
`PDCP duplication ................................................................................................................................. 62
`Other ..................................................................................................................................................... 66
`SDAP ......................................................................................................................................................... 68
`TS ......................................................................................................................................................... 68
`Header Format ...................................................................................................................................... 68
`QoS flow remapping and handover ...................................................................................................... 70
`Others ................................................................................................................................................... 71
`L2 parameters email discussion ................................................................................................................. 72
`Stage 3 control plane........................................................................................................................................ 73
`NR RRC ..................................................................................................................................................... 73
`TS and running CR ............................................................................................................................... 73
`Specification methodology ................................................................................................................... 73
`Connection control procedures ............................................................................................................. 73
`Corrections to connection control for EN-DC ................................................................................ 73
`Connection control message harmonisation .................................................................................... 74
`Connection establishment procedures ............................................................................................. 75
`Connection reconfiguration procedures .......................................................................................... 75
`Other (for non EN-DC) ................................................................................................................... 76
`RRM measurements ............................................................................................................................. 77
`Corrections to RRM for EN-DC ..................................................................................................... 77
`Measurement gaps for EN-DC ........................................................................................................ 80
`Measurement gaps for non EN-DC ................................................................................................. 81
`Measurement events ........................................................................................................................ 81
`Inter-RAT measurements ................................................................................................................ 81
`Other ............................................................................................................................................... 81
`Mobility ................................................................................................................................................ 82
`Corrections SCG change for EN-DC .............................................................................................. 82
`SCG failure for EN-DC .................................................................................................................. 82
`Handover ......................................................................................................................................... 84
`System information .............................................................................................................................. 84
`System information content/structure ............................................................................................. 84
`Stored system information .............................................................................................................. 85
`System information modification .................................................................................................... 85
`System information scheduling ....................................................................................................... 86
`On demand system information ...................................................................................................... 86
`System information -other .............................................................................................................. 87
`Inactive state ......................................................................................................................................... 88
`RAN area configuration .................................................................................................................. 88
`RAN area update procedure ............................................................................................................ 88
`Paging in inactive ............................................................................................................................ 89
`Inter-RAT mobility between NR Inactive and E-UTRA/5GC Inactive .......................................... 89
`Security framework for inactive ..................................................................................................... 89
`Inactive - other ................................................................................................................................ 90
`Access control ...................................................................................................................................... 91
`Access control for Idle/Inactive ...................................................................................................... 91
`Access control for connected .......................................................................................................... 93
`Inter-Node RRC messages .................................................................................................................... 93
`Inter-Node RRC messages for non EN-DC .................................................................................... 93
`Other (non EN-DC) .............................................................................................................................. 93
`LTE RRC changes related to NR ............................................................................................................... 93
`Running CR .......................................................................................................................................... 93
`Corrections to RRM measurements for EN-DC ................................................................................... 94
`Corrections to other EN-DC aspects ..................................................................................................... 95
`EN-DC ASN.1 review ................................................................................................................................ 97
`Rapporteur inputs ................................................................................................................................. 97
`ASN.1 issue documents ........................................................................................................................ 99
`Email discussion #30 on CSI meas config.......................................................................................... 108
`Email discussion #31 on Inter-Node RRC messages .......................................................................... 109
`UE capabilities ......................................................................................................................................... 110
`TS ....................................................................................................................................................... 110
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`Draft Report of 3GPP TSG RAN2#97, Athens. Greece, 13 - 17.02, 2017
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`10.4.4.2
`10.4.4.3
`10.4.4.4
`10.4.4.5
`10.4.5
`10.4.5.1
`10.4.5.2
`10.4.5.3
`10.4.5.4
`10.4.5.5
`10.4.5.6
`
`UE capability structure and UE capability coordination for EN DC .................................................. 110
`Other aspects for EN-DC .................................................................................................................... 112
`Temporary capability restriction ......................................................................................................... 115
`Other aspects for non EN-DC ............................................................................................................. 115
`Idle/inactive mode procedures.................................................................................................................. 115
`TS ....................................................................................................................................................... 115
`Selection/reselection rules .................................................................................................................. 116
`Cell quality derivation ........................................................................................................................ 117
`Service based reselection .................................................................................................................... 118
`Selection/reselection - other aspects ................................................................................................... 119
`Idle/inactive paging ............................................................................................................................ 121
`
`11
`11.1
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`Rel-15 NR Study Items ........................................................................................................................ 125
`Study on Integrated Access and Backhaul for NR ......................................................................................... 125
`
`12
`12.1
`12.1.1
`12.1.2
`12.2
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`Comebacks ........................................................................................................................................... 127
`Breakout sessions ........................................................................................................................................... 128
`Report from Break-Out session ................................................................................................................ 128
`Report from Break-Out session ................................................................................................................ 128
`Main session .................................................................................................................................................. 128
`
`13 Outgoing LSs ....................................................................................................................................... 129
`
`14 Any other business ............................................................................................................................... 129
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`15
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`Closing of the meeting (17:00) ............................................................................................................. 129
`
`Annex A: List of participants ...................................................................................................................... 129
`
`Annex B: List of Tdocs ................................................................................................................................. 129
`
`Annex C: Incoming liaison statements ....................................................................................................... 130
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`Annex D: Outgoing liaison statements ........................................................................................................ 132
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`Annex E: List of agreed CRs ....................................................................................................................... 133
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`Annex F: Email Approvals .......................................................................................................................... 133
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`Deadline Thursday, 2018-02-01, 23:59 Pacific Time .................................................................................... 133
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`Deadline Thursday, 2018-02-08, 23:59 Pacific Time .................................................................................... 134
`
`Deadline Monday, 2018-02-12, 23:59 Pacific Time ...................................................................................... 134
`
`Deadline Tuesday, 2018-02-20, 23:59 Pacific Time ...................................................................................... 136
`
`Annex G: History .......................................................................................................................................... 137
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`Draft Report of 3GPP TSG RAN2#97, Athens. Greece, 13 - 17.02, 2017
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`Organisation of the meeting
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`Meeting:
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`
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`Meeting location:
`
`Duration:
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`Host:
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`TSG RAN WG2 Chairman:
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`TSG RAN WG2 Vice chairman:
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`
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`3GPP TSG RAN2#AH-1801
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`Vancouver, Canada
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`22.01 - 26.01.2018
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`NAF
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`Richard Burbidge (Intel Corporation) (richard.c.burbidge@intel.com)
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`Hu Nan (CMCC) (hunan@chinamobile.com)
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`TSG RAN WG2 NR UP Session Chair:
`
`Diana Pani (InterDigital) (diana.pani@interdigital.com)
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`TSG RAN WG2 MCC Support:
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`Email reflector:
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`
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`Technical documents:
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`Next meetings:
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`Juha Korhonen (ETSI MCC) (juha.korhonen@etsi.org)
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`3GPP_TSG_RAN_WG2@LIST.ETSI.ORG
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`ftp://ftp.3gpp.org/tsg_ran/WG2_RL2/TSGR2_AHs/2018_01_NR/Docs/
`
`TSG RAN2#101
`
`26.02 - 03.02.2018, Athens, Greece
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`TSG RAN#79
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`
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`19.03 - 22.03.2018, Chennai, India
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`TSG RAN#101bis
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`16.04 - 20.04.2018, Sanya, China
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`Statistics/Executive Summary
`
`TSG RAN2#AH-1801 was held in Vancouver, Canada, hosted by North American Friends of 3GPP (NAF). The meeting
`had 2 breakout sessions in addition to the main session. The main session about NR control plane and NR CP/UP common
`issues. The parallel sessions were:
`
`- NR User Plane;
`
`- NR Idle mode procedures
`
`The statistics fom this meeting are:
`
`- 201 participants checked in (registered: 259 participants).
`
`- 1676 Tdoc numbers allocated with 1581 available contributions. (See the attached tdoc list)
`
`- 39 incoming liaison statements, out of which 37 were noted and 2 were withdrawn (to be treated in the next
`meeting).
`
`- 19 outgoing liaison statements.
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`- 24 email approvals/discussions scheduled after RAN2#AH-1801 meeting, see Annex F for details.
`
`- This meeting had no CRs submitted.
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`Draft Report of 3GPP TSG RAN2#97, Athens. Greece, 13 - 17.02, 2017
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`Opening of the meeting (9 AM)
`
`
`
` 1
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`
`
`1.1
`
`Call for IPR
`
`The attention of the delegates of this Working Group is drawn to the fact that 3GPP Individual
`Members have the obligation under the IPR Policies of their respective Organizational Partners to
`inform their respective Organizational Partners of Essential IPRs they become aware of.
`
`The delegates were asked to take note that they were hereby invited:
`
`•
`
`•
`
`to investigate whether their organization or any other organization owns IPRs which were, or
`were likely to become Essential in respect of the work of 3GPP.
`
`to notify their respective Organizational Partners of all potential IPRs, e.g., for ETSI, by means
`of the IPR Statement and the Licensing declaration forms (http://webapp.etsi.org/Ipr/).
`
`
`
`NOTE:
`
`IPRs may be declared to the Director-General or Chairman of the SDO, but not to the RAN WG2 Chairman.
`
`1.2
`
`Network usage conditions
`
`The PCG has laid down the following network usage conditions
`
`1. Users shall not use the network to engage in illegal activities. This includes activities such as
`copyright violation, hacking, espionage or any other activity that may be prohibited by local laws.
`
`2. Users shall not engage in non-work related activities that consume excessive bandwidth or cause
`significant degradation of the performance of the network.
`
`Since the network is a shared resource, users should exercise some basic etiquette when using the 3GPP
`network at a meeting. It is understood that high bandwidth applications such as downloading large files
`or video streaming might be required for business purposes, but delegates should be strongly
`discouraged in performing these activities for personal use. Downloading a movie or doing something in
`an interactive environment for personal use essentially wastes bandwidth that others need to make the
`meeting effective. The meeting chairman should remind end users that the network is a shared resource;
`the more one user grabs, the less there is for another. Email and its attachments already take up
`significant bandwidth (certain email programs are not very bandwidth efficient). In case of need the
`chair can ask the delegates to restrict IT usage to things that are essential for the meeting itself.
`
`1.
`
`2.
`
`3.
`
`4.
`
`DON’T place your WiFi device in ad-hoc mode
`
`DON’T set up a personal hotspot in the meeting room
`
`DO try 802.11a if your WiFi device supports it
`
`DON’T manually allocate an IP address
`
`DON’T be a bandwidth hog by streaming video, playing online games, or downloading
`5.
`huge files
`
`DON’T use packet probing software which clogs the local network (e.g., packet sniffers or
`6.
`port scanners)
`
`1.3
`
`Other
`
`In accordance with the Working Procedures it is reaffirmed that:
`
`(i) compliance with all applicable antitrust and competition laws is required;
`
`(ii) timely submissions of work items in advance of TSG or WG meetings are important to allow for full
`
`
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`Draft Report of 3GPP TSG RAN2#97, Athens. Greece, 13 - 17.02, 2017
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`and fair consideration of such matters; and
`
`(iii) the chairman will conduct the meeting with strict impartiality and in the interests of 3GPP
`
`
`
`
`
`Note on (i): In case of question please contact your legal counsel.
`
`Note on (ii): WIDs don’t need to be submitted to the RAN2 meeting and will typically not be discussed here either.
`
`2
`
`General
`
`THANK YOU to companies that request TDoc numbers and submit contributions early before deadline (really appreciated).
`Will start to refrain from treating late documents.
`
`2.1
`
`Approval of the agenda
`
`A draft schedule for the week is provided as a separate document, distributed via the RAN2 email reflector and made
`available during the meeting week in the RAN2\Inbox\Chairmans_Notes folder.
`
`R2-1800001 Agenda for RAN2 AH-1801
`
`Chairman
`
`agenda
`
`=> Approved
`
`Approval of the report of the previous meeting
`
`Reporting from other meetings
`
`2.2
`
`2.3
`
`NR
`
`NR specifications: All NR submitted to RAN were approved.
`
`NR workload management: RAN chair's summary on NR workload management was endorsed in RP-172844. RAN2
`will focus on corrections to EN-DC and essential components of standalone in the next quarter. NR-NR DC to commence
`in Q2. Other aspects impacting RAN2 are described in more detail below.
`
`NR Study Items: The RAN2 time allocated to NR SIs within the Q1 2018 was reduced to allow focus on corrections to
`EN-DC and on progressing standalone. The unlicensed study will not be discussed in Q1 2018 and the IAB study will be
`discussed in the January ad hoc (with 0.5 TU allocation) but not discussed in the February meeting. (Endorsed in RP-
`172805).
`
`URLLC: The scope of URLLC work to be done within the NR WI was endorsed in RP-172817. For RAN2, this means
`that we work on duplication for CA and DC and also on the upper layer impacts of RAN1's topics after RAN1 has
`progressed. In Q1 2018, duplication will only be discussed within the user plane session.
`
`
`
`LTE/NR
`
`LTE RRC ASN.1 freeze will apply to EN-DC only and not any completed Rel-15 LTE WIs. To make this easier the CRs
`from completed LTE WIs will not be implemented in the RAN2 specifications until June 2018. Further details, including
`handling of corrections related to these LTE WIs, is described in the endorsed RP-172755).
`
`0ms handover interruption time: RAN2 is tasked by RAN to investigate how to meet the IMT-2020 requirement for 0ms
`handover interruption time for both LTE and NR. This is will initially be handled by email discussion, then discussed at the
`RAN2#101 and the conclusions reported to RAN#79. (Endorsed in RP-172807).
`
`
`
`LTE
`
`
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`Control plane latency: RAN2 (and RAN1) is tasked to check the feasibility and values for reduced processing times for
`the RRC Resume procedure, in order to meet the IMT-2020 requirement for 20ms control plane latency. This task is
`communicated to RAN