公开(公告)号：US20220272759A1

公开(公告)日：2022-08-25

申请号：US17625858

申请日：2021-02-05

Applicant: NEC Corporation

Inventor： Maxime GRAU ,  Chadi KHIRALLAH ,  Yuhua CHEN ,  Neeraj GUPTA

IPC: H04W74/08

Abstract: A system is disclosed in which an item of user equipment (UE) obtains a reference signal received power (RSRP) threshold value for transmitting a random access message (MsgA) comprising both a preamble part and a Physical Uplink Shared Channel (PUSCH) transmission part. The UE obtains information identifying at least one respective offset associated with at least one priority level, and determines a type of random access procedure (two-step or legacy random access procedure) to be performed based on an RSRP measured by the UE, the RSRP threshold value, and a priority level associated with the UE.

公开(公告)号：US20200178204A1

公开(公告)日：2020-06-04

申请号：US16784026

申请日：2020-02-06

Applicant: NEC CORPORATION

Inventor： Yuhua CHEN ,  Chadi KHIRALLAH ,  Neeraj GUPTA

IPC: H04W68/00 ,  H04W76/27 ,  H04W60/00 ,  H04W48/16 ,  H04W8/08 ,  H04W4/029

Abstract: A communication system is disclosed in which a base station receives, from at least one further base station, information identifying at least one respective tracking area associated with at least one cell of each further base station. The base station also receives, from a core network, information identifying a registration area for a user equipment (UE). The base station defines, based on the received information identifying at least one respective tracking area and the received information identifying a registration area, a radio access network (RAN) based notification area for the UE.

公开(公告)号：US20180242357A1

公开(公告)日：2018-08-23

申请号：US15750987

申请日：2016-09-07

Applicant: NEC Corporation

Inventor： Chadi KHIRALLAH ,  Vivek SHARMA ,  Yassin Aden AWAD ,  Robert ARNOTT

IPC: H04W74/08 ,  H04W74/00 ,  H04W72/04 ,  H04W72/14 ,  H04L1/18 ,  H04L5/00

Abstract: A communication system is disclosed in which a communication device communicates with communication apparatus that operates a cell within which the communication device is located. The cell is operated as a licensed assisted access (LAA) cell and has an associated physical uplink control channel (PUCCH). The communication device has a controller that is adapted to: generate a control signal for transmitting to said communication apparatus; perform a clear channel assessment (CCA) on said PUCCH before the control signal is transmitted; and block transmission of the control signal on said PUCCH when said CCA indicates that said channel is not clear. The communication device is further adapted, when said controller has not blocked said transmission of the control signal, to transmit the control signal to said communication apparatus in said PUCCH.

公开(公告)号：US20210306848A1

公开(公告)日：2021-09-30

申请号：US17252057

申请日：2019-06-14

Applicant: NEC CORPORATION

Inventor： Yuhua CHEN ,  Sadafuku HAYASHI ,  Hisashi FUTAKI ,  Jagdeep Ahluwalia SINGH ,  Neeraj GUPTA ,  Chadi KHIRALLAH

IPC: H04W12/033 ,  H04W76/18

Abstract: A communication system is disclosed in which a distributed base station apparatus comprises a central unit for control plane signalling (CU-CP), at least one a central unit for user plane signalling (CU-UP), and at least one distributed unit. The CU-CP obtains information indicating whether a security configuration is supported by a CU-UP and selects a security configuration for an item of user equipment (UE) based on the obtained information.

公开(公告)号：US20200067685A1

公开(公告)日：2020-02-27

申请号：US16495445

申请日：2018-03-22

Applicant: NEC CORPORATION

Inventor： Yassin Aden AWAD ,  Chadi KHIRALLAH ,  Jagdeep Singh AHLUWALIA ,  Robert ARNOTT

IPC: H04L5/00 ,  H04W72/04

Abstract: A communication system is disclosed in which a communication device and a base station initially communicate using a first bandwidth. The communication device monitors for control data transmitted, by the base station, using a first control resource set conveyed in the first bandwidth. The communication device and the base station switch to using a second bandwidth, wherein the second bandwidth is different to the first bandwidth, and the communication device monitors for control data transmitted, by the base station, using a second control resource set that is conveyed in the second bandwidth.

公开(公告)号：US20190357227A1

公开(公告)日：2019-11-21

申请号：US16476169

申请日：2017-12-19

Applicant: NEC Corporation

Inventor： Chadi KHIRALLAH ,  Yassin Aden AWAD ,  Yuhua CHEN ,  Robert ARNOTT

IPC: H04W72/08 ,  H04L12/947 ,  H04W72/04

Abstract: A communication system is disclosed in which a base station manages the transmission of on-demand system information to optimise the trade-off between the additional signalling overhead associated with on-demand transmission and the resource usage inefficiencies associated with the sometimes unnecessary transmission of system information on a periodic basis. The base station manages switching from on-demand transmission to periodic transmission, and vice versa, based on one or more utilisation thresholds.