US 10,757,699 B2Granted

Downlink prioritization in TDD based LBT systems

AssigneeTelefonaktiebolaget LM Ericsson (publ)

InventorsDu Ho Kang, Jung-Fu Cheng, Laetitia Falconetti

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Abstract

The present disclosure relates to a technique of prioritizing downlink transmission. More particularly, the present disclosure relates to a technique of prioritizing Downlink transmission in a Time Division Duplex wireless communication system employing a channel sensing mechanism. A method embodiment comprises: transmitting, by an access network node of the wireless communication system, an Uplink, UL, grant to a wireless communication device, the UL grant indicating that an UL transmission is planned in one or more first subframes; and prioritizing, by the access network node, Downlink, DL, transmission in one or more second subframes over the planned UL transmission, the one or more second subframes at least partially overlapping with the one or more first subframes.

Claims15

Dependent claims

A method of prioritizing Downlink, DL, transmission in a Time Division Duplex, TDD, wireless communication system providing a channel sensing mechanism, the method comprising:

transmitting, by an access network node of the wireless communication system, an Uplink, UL, grant to a wireless communication device, the UL grant indicating that an UL transmission is planned in one or more first subframes;
and
prioritizing, by the access network node, a Downlink, DL, transmission in one or more second subframes over the planned UL transmission, the one or more second subframes at least partially overlapping with the one or more first subframes, wherein a transmission duration of the prioritized DL transmission is adjusted by reducing the transmission duration of the DL transmission based on a prioritization level of the DL transmission meeting a predetermined threshold;
wherein prioritizing the DL transmission comprises adapting, by the access network node, one or more channel sensing parameters of the planned UL transmission,
wherein the one or more channel sensing parameters comprise a contention window size, and wherein adapting the one or more channel sensing parameters comprises decreasing a duration of sensing, by the access network node, a wireless communication medium before starting the DL transmission.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/774,775Filed 9 Nov 2015
Published: US 2018/0332579 A115 Nov 2018
Granted: 25 Aug 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04W 72/0446
Based on the type of the allocated resource: resources in time domain, e.g. slots or frames
H04L 5/14
Arrangements affording multiple use of the transmission path: two-way operation using the same type of signal, i.e. duplex
H04W 72/566
Based on priority criteria: of the information or information source or recipient
H04W 72/23
Control channels or signalling for resource management: in the downlink direction of a wireless link, i.e. towards a terminal