公开(公告)号：US20230380008A1

公开(公告)日：2023-11-23

申请号：US18362546

申请日：2023-07-31

Applicant: MEDIATEK INC.

Inventor： Chien-Chun HUANG-FU ,  Chun-Fan TSAI ,  I-Kang FU ,  Chin-Chia CHANG

IPC: H04W76/30 ,  H04W76/27

CPC classification number: H04W76/30 ,  H04W76/27

Abstract: A User Equipment (UE) including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from a first service network utilizing a first RAT or a second service network utilizing a second RAT. The controller sends an indicator of a connection release request to the first service network via the wireless transceiver in response to terminating a first communication service with the first service network or in response to leaving the first service network for the second service network. Also, the controller releases a Radio Resource Control (RRC) connection with the first service network after sending the indicator of the connection release request.

公开(公告)号：US20230335914A1

公开(公告)日：2023-10-19

申请号：US18299162

申请日：2023-04-12

Applicant: MEDIATEK INC.

Inventor： Shao-Chou HUNG ,  Bao-Chi PENG ,  Chun-Chia CHEN ,  I-Kang FU ,  Abdelkader MEDLES ,  Gilles CHARBIT

IPC: H01Q15/24

CPC classification number: H01Q15/246 ,  H01Q15/244

Abstract: Provided is an apparatus for transmitting a circularly polarized signal by linearly polarized antennas. A horizontally polarized antenna and a vertically polarized antenna of the apparatus receives a first circularly polarized signal transmitted based on a transmitted baseband signal vector. Based on the first circularly polarized signal, a radio frequency (RF) module of the apparatus generates a received baseband signal vector including a product of the transmitted baseband signal vector and a receiving polarization vector of the transmitted baseband signal vector. Processing circuitry of the apparatus estimates the receiving polarization vector based on the received baseband signal vector and calibrates power amplifiers (PAs) and local oscillator (LO) signals of frequency converters in the RF module based on the estimated receiving polarization vector. The horizontally and vertically polarized antennas transmit a second circularly polarized signal based on the calibrated PAs and the calibrated LO signals of the frequency converters.

公开(公告)号：US20210212155A1

公开(公告)日：2021-07-08

申请号：US17123296

申请日：2020-12-16

Applicant: MEDIATEK INC.

Inventor： Chien-Chun HUANG-FU ,  Chun-Fan TSAI ,  I-Kang FU ,  Chin-Chia CHANG

IPC: H04W76/30 ,  H04W76/27

Abstract: A User Equipment (UE) including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from a first service network utilizing a first RAT or a second service network utilizing a second RAT. The controller sends an indicator of a connection release request to the first service network via the wireless transceiver in response to terminating a first communication service with the first service network or in response to leaving the first service network for the second service network. Also, the controller releases a Radio Resource Control (RRC) connection with the first service network after sending the indicator of the connection release request.