Industrial Technology Research Institute

You-En Lin

Jen-Feng Huang

Ching-Feng Liang

Ting-Ming Tsai

Chi-Tao Chiang

Provided is an uplink signal time difference adjustment method, adapted to a base station and including the following steps. Each first delay time of arrival of each uplink signal is detected based on a time slot boundary. Each second delay time of each uplink signal is adjusted according to multiple sampling points. Each time offset between each first delay time and each second delay time corresponding to each user apparatus is calculated. The time slot boundary is adjusted according to each time offset.

Uplink signal time difference adjustment system and method

A grouping method of user devices comprises configuring one or more codes for each of the user devices by a base station wherein each of said one or more codes corresponds to a delay tolerance, performing a grouping task by the base station according to the delay tolerances and a determining result of channel-usage demand corresponding to each of the user devices so as to form one or more first-type groups and one or more second-type groups wherein each first-type group corresponds to a first-group delay tolerance and each second-type group corresponds to a second-group delay tolerance, and performing a selection from user devices in the first-type groups and the second-type groups to form one or more target groups by the base station according to the first-group delay tolerances and the second-group delay tolerances.

Method of grouping user devices

A base station capable of allocating channel status reports includes a memory, a communication module and a processor. The processor is configured to send RRC configuration messages each including a periodic CSI parameter set and a discontinuous reception parameter set to user devices respectively. The periodic CSI parameter set includes a report period, a report time shift and a piece of PUCCH resource information. The RRC configuration messages include the same report period, the same report-time shift and the same PUCCH resource information. The processor is configured to determine one of a plurality of conflicting user devices among the user devices will report a CSI when predicting that the plurality of conflicting user devices will report the CSI simultaneously. The processor is configured to send a sleep instruction to the conflicting user devices except the conflicting user device determined to report the CSI.

Base station capable of allocating channel-state report and method for allocating channel-state report

A wireless communication method comprises the following steps: a Static and Public Virtual Access Point (PS-VAP) on a Physical Access Point (PAP) receives a Probe Request from a station; the PS-VAP sends a Virtual Access Point (VAP) Setup Request to a server in response to the Probe Request; the PAP creates a Dedicated-and-Dynamic VAP (DD-VAP) having a Service Set Identifier (SSID) for the station according to a VAP Setup Response sent from the server; and the DD-VAP sends a Probe Reply including the SSID of the DD-VAP to the station.

Wireless communication method, wireless communication device and non-transitory computer readable recording medium thereof

Methods and apparatuses of mitigating interference in a heterogeneous network using an inter-cell interference coordination are provided. An interference control server assigns, for each of the UE groups, a set of almost blank subframes (ABS) or non-preferred sub-bands specific to the corresponding one of the UE groups based on the UE group interference relationship and a resource demand for each of the UE groups. A base station assigns a plurality of sets of ABS (or non-preferred sub-bands) to reuse time-domain (or frequency-domain) resources.

Method and apparatus of mitigating interference in a heterogeneous network using an inter-cell interference coordination

A hybrid automatic repeat request method comprises selecting a first HARQ process group from HARQ process groups to send a first data packet, recognizing that a feedback signal corresponds to a first HARQ process in the first HARQ process group according to the feedback signal and the time of receiving the feedback signal, determining whether the last used HARQ process in the first HARQ process group is identical to the first HARQ process when the first data packet is decoded incorrectly, instructing the first HARQ process to transmit the first data packet when the two processes are different, and instructing the first HARQ process to transmit a second data packet or the first data packet when the two processes are identical, wherein the first data packet is based on a whole of the raw data, and the second data packet is based on a part of the raw data.

Hybrid automatic repeat request method and system

A method for scheduling radio resource in an unlicensed spectrum and a base station using the method is provided. This method includes following steps. Downlink data are obtained, and the first starting time point for a downlink transmission of this downlink data is estimated. A plurality of second starting times are set according to the first starting time point. A plurality of downlink control information (DCIs) for the downlink data are prepared before the earliest second start time point. Each of the DCIs is corresponding to each of the first start time point or the second start time points, and each of the DCIs points to a radio resource block of the downlink data. Clear Channel Assessment (CCA) procedure in the unlicensed spectrum is performed, and the DCIs are disposed in a physical downlink control channel (PDCCH) after the channel process is completed.

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Taichung, Taiwan

You-En Lin