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1. WO2021028871 - CELL RESELECTION TRIGGERED BY LISTEN-BEFORE-TALK (LBT) FAILURES

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Publication Number WO/2021/028871
Publication Date 18.02.2021
International Application No. PCT/IB2020/057646
International Filing Date 13.08.2020
IPC
H04W 16/14 2009.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
16Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cell structures
14Spectrum sharing arrangements
H04W 88/02 2009.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
88Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
02Terminal devices
H04W 48/06 2009.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
48Access restriction; Network selection; Access point selection
02Access restriction performed under specific conditions
06based on traffic conditions
H04W 72/08 2009.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
72Local resource management, e.g. selection or allocation of wireless resources or wireless traffic scheduling
04Wireless resource allocation
08based on quality criteria
H04W 74/08 2009.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
74Wireless channel access, e.g. scheduled or random access
08Non-scheduled access, e.g. random access, ALOHA or CSMA
CPC
H04W 16/14
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
16Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
14Spectrum sharing arrangements ; between different networks
H04W 36/22
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
36Hand-off or reselection arrangements
16Performing reselection for specific purposes
22for handling the traffic
H04W 36/305
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
36Hand-off or reselection arrangements
24Reselection being triggered by specific parameters ; used to improve the performance of a single terminal
30by measured or perceived connection quality data
305Reselection due to radio link failure
H04W 48/06
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
48Access restriction
02Access restriction performed under specific conditions
06based on traffic conditions
H04W 74/0808
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
74Wireless channel access, e.g. scheduled or random access
08Non-scheduled ; or contention based; access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
0808using carrier sensing, e.g. as in CSMA
H04W 76/18
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
76Connection management
10Connection setup
18Management of setup rejection or failure
Applicants
  • TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) [SE]/[SE]
Inventors
  • KARLSSON, Robert
  • CHRISTOFFERSSON, Jan
  • PHAN, Mai-Anh
  • WANG, Min
Agents
  • HERRERA, Stephen
Priority Data
62/887,43015.08.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) CELL RESELECTION TRIGGERED BY LISTEN-BEFORE-TALK (LBT) FAILURES
(FR) RESÉLECTION DE CELLULE DÉCLENCHÉE PAR DES DÉFAILLANCES D'ÉCOUTE AVANT DE PARLER (LBT)
front page image
Abstract
(EN)
A User Equipment (UE) (40) triggers (132) cell reselection responsive to detecting Listen-Before-Talk (LBT) failures, and initiates (138) cell reselection according to specified schemes, or preconfigured conditions and schemes. When the UE determines that the uplink (UL) channel(s) are too busy to provide service(s) for the UE, the UE can select another cell on another frequency.
(FR)
Un équipement utilisateur (UE) (40) déclenche (132) une resélection de cellule en réponse à la détection de défaillances d'écoute avant de parler (LBT), et initie (138) une resélection de cellule selon des schémas spécifiés, ou des conditions et des schémas préconfigurés. Lorsque l'UE détermine que le ou les canaux de liaison montante (UL) sont trop occupés pour fournir un ou des services pour l'UE, l'UE peut sélectionner une autre cellule sur une autre fréquence.
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