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1. WO2020065041 - SRS TRANSMISSION METHODOLOGIES IN UNLICENSED SPECTRUM

Publication Number WO/2020/065041
Publication Date 02.04.2020
International Application No. PCT/EP2019/076252
International Filing Date 27.09.2019
IPC
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
H04L 25/02 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25Baseband systems
02Details
H04W 72/04 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
CPC
H04L 25/0226
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25Baseband systems
02Details
0202Channel estimation
0224using sounding signals
0226sounding signals per se
H04W 72/0446
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
WWIRELESS COMMUNICATION NETWORKS
72Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
04Wireless resource allocation
044where an allocation plan is defined based on the type of the allocated resource
0446the resource being a slot, sub-slot or frame
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
Applicants
  • TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) [SE]/[SE]
Inventors
  • VIEIRA, Joao
  • DO, Tai
  • KARAKI, Reem
Agents
  • ERICSSON
Priority Data
62/738,79928.09.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SRS TRANSMISSION METHODOLOGIES IN UNLICENSED SPECTRUM
(FR) MÉTHODOLOGIES DE TRANSMISSION SRS DANS UN SPECTRE SANS LICENCE
Abstract
(EN)
Systems and methods are disclosed herein for SRS transmission in a cellular communications system. Transmission of one or more SRSs at the beginning of a transmission burst shortens the initial transmission delay, which improves resource efficiency. Embodiments of a wireless device and method performed therein include, in a first X slots or mini-slots of a transmission burst from the wireless device, mapping SRSs at a beginning of the transmission from the wireless device. In some embodiments, X is a natural number greater than zero and either the transmission burst starts at any symbol of a slot or mini-slot, from among a plurality of slots or minislots for the transmission burst, that occurs immediately after the wireless device gets access to a wireless medium upon completing a Listen-Before-Talk (LBT) procedure, or the transmission burst starts at a predefined starting position of a slot or mini-slot.
(FR)
La présente invention concerne des systèmes et des procédés de transmission SRS dans un système de communication sans fil. La transmission d'un ou de plusieurs SRS au début d'une rafale de transmission raccourcit le retard de transmission initial, ce qui améliore l'efficacité des ressources. Des modes de réalisation d'un dispositif sans fil et d'un procédé mis en œuvre dans celui-ci comprennent, dans des premiers X créneaux ou mini-créneaux d'une rafale de transmission provenant du dispositif sans fil, le mappage des SRS au début de la transmission à partir du dispositif sans fil. Dans certains modes de réalisation, X est un nombre naturel supérieur à zéro et soit la rafale de transmission commence au niveau d'un symbole quelconque d'un créneau ou d'un mini-créneau, parmi une pluralité de créneaux ou de mini-créneaux pour la rafale de transmission, qui se produit immédiatement après que le dispositif sans fil accède à un support sans fil lors de l'achèvement d'une procédure d'écoute avant de parler (LBT), soit la rafale de transmission commence à une position de départ prédéfinie d'un créneau ou d'un mini-créneau.
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