公开(公告)号：US20190069218A1

公开(公告)日：2019-02-28

申请号：US15773621

申请日：2016-11-04

Applicant: Nokia Solutions and Networks Oy

Inventor： Cassio Barboza RIBEIRO ,  Timo Erkki Lunttila ,  Juha Heiskala ,  Michal Cierny ,  Klaus Hugl

IPC: H04W48/10

Abstract: A method including receiving information on a first channel on preconfigured channel elements in a transmission time interval of a wireless communication system, wherein the information on the first channel includes first system information and downlink control information related to a transmission of second system information on a second channel in the transmission time interval. The method may further include receiving the second system information based on the downlink control information.

公开(公告)号：US11083012B2

公开(公告)日：2021-08-03

申请号：US15746069

申请日：2015-08-17

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Michal Cierny ,  Klaus Hugl ,  Timo Erkki Lunttila ,  Cassio Barboza Ribeiro

IPC: H04W74/08 ,  H04W72/04 ,  H04W84/12 ,  H04W16/14

Abstract: There is provided a method comprising determining, at a first access point, whether a carrier from a plurality of carriers is a primary listen-before-talk carrier or a secondary listen-before-talk carrier and providing information using the carrier, said information comprising an indication of whether the respective carrier is a primary listen-before-talk carrier or a secondary listen-before-talk carrier.

公开(公告)号：US11323998B2

公开(公告)日：2022-05-03

申请号：US15532209

申请日：2014-12-03

Applicant: Nokia Solutions and Networks Oy

Inventor： Michal Cierny ,  Timo Erkki Lunttila

IPC: H04W72/04 ,  H04W16/14 ,  H04W24/10 ,  H04W74/00 ,  H04W84/04 ,  H04W84/12

Abstract: The application relates to improved hidden node detection for Long Term Evolution LTE Licensed-Assisted Access LAA. Channel State Information CSI measurements can be seen as one existing solution that could be used for obtaining information about the existence of a hidden node. However, relying on CSI reporting alone is rather unreliable. One of the reasons for this is that the CSI measurements and reporting do not take into account the regulatory requirements such as LBT. A further possible way to detect hidden nodes is to perform LBT (clear channel assessment CCA) at the transmitter (e.g. eNB) and receiver (e.g. UE) at the same time. However, there is still the need for an improved solution for how to detect hidden nodes preventing LTE LAA uplink operation and complicating coexistence. These problems are solved by ensuring that interference from non-hidden nodes (such as WLAN node 1 in FIG. 1) is not measured. Therefore the serving eNB detects a free channel during LBT procedure, i.e. that non-hidden nodes are not transmitting, and informs the UE which performs the hidden node detection measurements, by downlink scheduling, whether the serving eNB is active in the current subframe. The UE then performs the measurements only in subframes of the channel occupied by the serving eNB. Thereby, the UE only captures interference coming from hidden nodes.

公开(公告)号：US10425966B2

公开(公告)日：2019-09-24

申请号：US15524399

申请日：2015-10-27

Applicant: Nokia Solutions and Networks Oy

Inventor： Michal Cierny ,  Kari Juhani Hooli ,  Timo Lunttila ,  Esa Tapani Tiirola

IPC: H04W74/08 ,  H04L5/00 ,  H04L27/00 ,  H04L1/00 ,  H04W28/26 ,  H04J13/00

Abstract: A method and apparatus can be configured to determine that a sub-symbol slot is an unoccupied sub-symbol slot. The unoccupied sub-symbol slot corresponds to an unoccupied operating channel. The unoccupied sub-symbol slot is located within the duration of a first symbol. The method may also comprise transmitting a reservation signal in at least one sub-symbol slot between the unoccupied sub-symbol slot and the beginning of a second symbol. The number of sub-symbol slots within the duration of the first symbol is larger than one.

公开(公告)号：US20180288801A1

公开(公告)日：2018-10-04

申请号：US15524399

申请日：2015-10-27

Applicant: Nokia Solutions and Networks Oy

Inventor： Michal Cierny ,  Kari Juhani Hooli ,  Timo Lunttila ,  Esa Tapani Tiirola

IPC: H04W74/08 ,  H04W28/26 ,  H04L1/00

CPC classification number: H04W74/0816 ,  H04J13/0062 ,  H04L1/004 ,  H04L5/0048 ,  H04L27/0008 ,  H04W28/26

Abstract: A method and apparatus can be configured to determine that a sub-symbol slot is an unoccupied sub-symbol slot. The unoccupied sub-symbol slot corresponds to an unoccupied operating channel. The unoccupied sub-symbol slot is located within the duration of a first symbol. The method may also comprise transmitting a reservation signal in at least one sub-symbol slot between the unoccupied sub-symbol slot and the beginning of a second symbol. The number of sub-symbol slots within the duration of the first symbol is larger than one.

公开(公告)号：US20170339693A1

公开(公告)日：2017-11-23

申请号：US15532209

申请日：2014-12-03

Applicant: Nokia Solutions and Networks Oy

Inventor： Michal Cierny ,  Timo Erkki Lunttila

IPC: H04W72/04 ,  H04W16/14 ,  H04W74/00 ,  H04W24/10 ,  H04W84/12 ,  H04W84/04

CPC classification number: H04W72/0446 ,  H04W16/14 ,  H04W24/10 ,  H04W74/006 ,  H04W84/042 ,  H04W84/12

Abstract: The application relates to improved hidden node detection for Long Term Evolution LTE Licensed-Assisted Access LAA. Channel State Information CSI measurements can be seen as one existing solution that could be used for obtaining information about the existence of a hidden node. However, relying on CSI reporting alone is rather unreliable. One of the reasons for this is that the CSI measurements and reporting do not take into account the regulatory requirements such as LBT. A further possible way to detect hidden nodes is to perform LBT (clear channel assessment CCA) at the transmitter (e.g. eNB) and receiver (e.g. UE) at the same time. However, there is still the need for an improved solution for how to detect hidden nodes preventing LTE LAA uplink operation and complicating coexistence. These problems are solved by ensuring that interference from non-hidden nodes (such as WLAN node 1 in FIG. 1) is not measured. Therefore the serving eNB detects a free channel during LBT procedure, i.e. that non-hidden nodes are not transmitting, and informs the UE which performs the hidden node detection measurements, by downlink scheduling, whether the serving eNB is active in the current subframe. The UE then performs the measurements only in subframes of the channel occupied by the serving eNB. Thereby, the UE only captures interference coming from hidden nodes.