3GPP RAN1 and RAN4 status on NR-Unlicensed and LAA

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Presentation transcript:

3GPP RAN1 and RAN4 status on NR-Unlicensed and LAA Month Year doc.: IEEE 802.11-yy/xxxxr0 November 2018 3GPP RAN1 and RAN4 status on NR-Unlicensed and LAA Date: 2018-11-15 Authors: Name Affiliations Address Phone email Shubhodeep Adhikari Broadcom shubhodeep.adhikari@broadcom.com Sindhu Verma sindhu.verma@broadcom.com John Doe, Some Company

Month Year doc.: IEEE 802.11-yy/xxxxr0 November 2018 Abstract This presentation provides updates from the latest 3GPP RAN1 and RAN4 meetings (RAN1#94bis/RAN1#95, RAN4#88bis/RAN4#89 on the standardization of NR-Unlicensed and LAA, with a focus on fair coexistence with 802.11. John Doe, Some Company

Outline The presentation discusses the following topics: RAN1 (NR-U) Month Year doc.: IEEE 802.11-yy/xxxxr0 November 2018 Outline The presentation discusses the following topics: RAN1 (NR-U) No-LBT or 25us LBT for transmission of control messages Multiple DL-UL-DL switches in a COT with and without pauses No-LBT for UL transmissions within a COT with a gap of 16 us Multiple LBT attempts by UL within a shared COT UE to gNB COT sharing Shared COT for AUL transmissions Multicarrier channel access Adoption of 802.11 preamble RAN4 Invalid band combinations in LAA John Doe, Some Company

No-LBT or 25us LBT for transmission of control messages November 2018 RAN1: NR-Unlicensed No-LBT or 25us LBT for transmission of control messages Status: 25us LBT for transmission of DRS Multiple DL-UL-DL switches in a COT with and without pauses Status: Allowed No-LBT for UL transmissions within a COT with a gap of 16 us Multiple LBT attempts by UL within a shared COT Status: No decision UE to gNB COT sharing Shared COT for AUL transmissions Multicarrier channel access Adoption of 802.11 preamble

RAN4: Invalid band combinations defined for LAA in 5GHz November 2018 RAN4: Invalid band combinations defined for LAA in 5GHz Overview: The LAA standards specify that if the maximum number of channels that LAA can simultaneously transmit is <= 4, the maximum frequency separation between the center frequencies of any two carriers should be <= 62MHz. This clause has been put to ensure fair coexistence with 802.11 multi-carrier transmissions that use a fixed “channel bonded” structure as shown below. The bonded structure ensures the following: Concurrent transmissions of the same bandwidth from two 802.11 nodes are either completely overlapping or completely disjoint. All co-channel 802.11 nodes get similar priority to access their primary/secondary channels. The ETSI-BRAN regulations ([2]) also require that LAA must follow the above 802.11 bonded multi-carrier transmission scheme if the multi-carrier LBT scheme is the same as 802.11. Status: A CR to make this change was agreed in RAN4 but companies disputed on their agreement in the RAN Plenary. A subsequent CR is being discussed in RAN4

Month Year doc.: IEEE 802.11-yy/xxxxr0 November 2018 References [1] Chairman’s notes RAN1 94bis final, Chengdu, China [2] ETSI EN 301 893, 5 GHz RLAN Harmonised Standard covering the essential requirements of article 3.2 of Directive 2014/53/EU. John Doe, Some Company