Mediatek Corporation

Yi-Chun Wei

Chi-Chen Lee

Yi-Jung Chiang

Hung-Wei Shih

Chia-Hao Yu

Ju-Ya Chen

Chia-Chun Hsu

Yih-Shen Chen

Chien-Hwa Hwang

Chiou-Wei Tsai

Yu-Chuan Lin

Meng-Shiang Lin

Yi-Yo Lin

Yen-Po Lee

Tsang-Yi Shen

A communications apparatus includes at least two cellular system radio transceivers capable of simultaneously performing transmitting/receiving radio activities in two cellular networks and a control entity. The control entity is coupled to the cellular system radio transceivers, collects radio activity information of the cellular system radio transceivers, determines whether interference will occur or is occurring and which cellular system radio transceiver is an aggressor transceiver and which cellular system radio transceiver is a victim transceiver when the interference occurs according to the radio activity information, and further determines control information according to the radio activity information for controlling the aggressor transceiver or the victim transceiver to mitigate the interference. The aggressor transceiver is the cellular system radio transceiver having the transmitting radio activity that will interfere or interferes with the receiving radio activity of the victim transceiver.

Methods for mitigating interference in a communications apparatus and communications apparatus utilizing the same

A mobile communication device and a method thereof are provided. The method, adopted by a mobile communication device connected to a serving cell, including: receiving a measurement request for a first target cell; in response to the measurement request, acquiring first timing information of first system information for a first target cell; scheduling an autonomous gap substantially corresponding to occurrence of the first system information according to the first timing information; and initiating the autonomous gap to receive the first system information from the first target cell.

Mobile communication device for collecting system information and cell measurement using DRX gap and autonomous gap

A communications apparatus. The RF signal processing device is capable of supporting carrier aggregation and configured to process RF signals. The baseband signal processing device is configured to process baseband signals. The processor is configured to control operations of the RF signal processing device and the baseband signal processing device. The processor further receives a power control signal from a peer communications apparatus, obtains an assigned transmission power which is assigned by the peer communications apparatus for the communications apparatus to transmit a reference signal according to information carried in the power control signal, determines a spectral efficiency estimation value of the communications apparatus and directs the RF signal processing device to transmit the reference signal with a reduced transmission power which is smaller than the assigned transmission power when the spectral efficiency estimation value is smaller than a predetermined threshold.

Method for transmission power shaping and communications apparatus utilizing the same

A method of obtaining system frame number for handover is provided. A UE receives a handover command from a serving base station in a serving cell. The UE performs downlink synchronization with a target base station. Upon synchronization, the UE determines a radio frame boundary of a target cell. The UE then obtains a system frame number of the target cell based on the radio frame boundary. The UE performs a handover procedure with the target cell by transmitting a RACH preamble to the target base station. The RACH preamble is transmitted over a PRACH resource determined from the system frame number without reading SFN information from a PBCH/BCH broadcasted from the target base station. Finally, the UE establishes data connection with the target base station. Handover interruption time is reduced by obtaining SFN before PBCH reading and decoding.

Obtaining system frame number of target cell during handover

A method of maximum output power configuration with UE preference in carrier aggregation is provided. A UE configures multiple component carriers (CCs) with carrier aggregation for communicating with a serving base station in a mobile communication network. The UE determines channel condition of multiple serving cells over the corresponding multiple CCs. The UE then determines maximum output power for each CC based at least in part on the corresponding channel condition of each CC. Finally, the UE transmits power headroom report (PHR) for each CC to the serving base station, wherein the PHR is calculated based on the determined maximum output power. As a result, the reported PH information is channel condition dependent, which can be used by eNB for facilitating better transmission scheduling.

Maximum output power configuration with UE preference in carrier aggregation

A communication apparatus is provided. A processor is coupled to a transceiver and includes at least a first processor logic unit for initiating a cell selection or a cell reselection procedure to camp on a target cell and obtain a plurality of paging parameters carried in one or more system information messages transmitted by the target cell via the transceiver and a second processor logic unit for monitoring a paging identifier on a downlink control channel via the transceiver to check whether there is any forthcoming paging message before the paging parameters are obtained from the target cell.

Growing community of inventors

Hsinchu, Taiwan

Yi-Chun Wei