Sercomm Corporation

Kun-Lin Chiang

Jia-Ming Chen

Ching-Feng Liang

Jen-Feng Huang

Shao-Yu Chien

A base station and an adjustment method for data transmission are provided. User equipment is selectively connected to two base stations at the same time. In the method, a remaining load amount is determined. A load demand amount required for a to-be-transmitted data bearer in the data bearer is determined. It is determined that a portion of the data packets corresponding to the to-be-transmitted data bearer is split, according to a comparison result between the remaining load amount and the load demand amount, to the second base station for transmission. A transmission ratio of the data packets split to the base station to those split to the second base station is determined according to a ratio of packet loss of the base station to the second base station. Accordingly, electric power of the user equipment can be saved, data loss can be reduced, and data can be converged effectively.

Base station and adjustment method for data transmission

A multi-cell coordination system and a channel calibration method thereof are provided. A reference apparatus receives a beam-precoding downlink reference signal via a directional beam from a base station. The base station receives a beam-precoding uplink reference signal via the directional beam from the reference apparatus. The server receives uplink and downlink channel information, where the uplink channel information is generated based on the uplink reference signal, and the downlink channel information is generated based on the downlink reference signal. The server obtains a channel calibration coefficient according to the uplink and downlink channel information. The channel calibration coefficient is used for estimating a downlink channel. Accordingly, the problem of conventional coordination system can be solved, and the embodiment can be implemented in multi-beam base station.

Multi-cell coordination system and channel calibration method thereof

A master base station and a resource allocation indicating method are provided. The master base station and a distributed base station are based on a layer 1-layer 2 split technology. A bandwidth part (BWP) configuration is enabled. Different BWP configurations have different configurations in a frequency domain. The BWP configuration corresponds to continuous and part of the common resource units, and corresponds to a common configuration to generate a corresponding relation, which is related to a corresponding situation between identifications of the local resource units and the common resource units. The identifications of the local resource units are used in the BWP configuration to identify the local resource units, and the identifications of the common resource units are used in the common configuration to identify the common resource units. The corresponding relation is transmitted. Accordingly, the BWP can be applied to a transmission interface of layer 1-layer 2 split technology.

Master base station and resourece allocation indicating method

A digital pre-distortion circuit and a digital pre-distortion method are provided. In the method, pre-distortion, digital-to-analog conversion and an amplifying process are performed on an input signal in sequence, to generate an output signal. A first bandwidth of the input signal after the pre-distortion is greater than a second bandwidth of the input signal after the digital-to-analog conversion. Signals outside the second bandwidth are filtered out from the output signal, to generate a second output signal. A third output signal, which is a signal after a pre-distorted signal is amplified, is estimated according to the pre-distorted signal and the second output signal. The pre-distorted signal is a signal after the pre-distortion is performed on the input signal. A third bandwidth of the third output signal is greater than the second bandwidth. Parameters of the pre-distortion can be determined according to the third output signal and the pre-distorted signal.

Digital pre-distortion circuit and digital pre-distortion method

A transceiving apparatus and a spectrum access controlling method thereof are provided. The transceiving apparatus may utilize an unlicensed spectrum. In the method, feedback information related to accessing the unlicensed spectrum is received. An energy detection threshold is modified according to the feedback information. Whether to access the unlicensed spectrum is determined according to the modified energy detection threshold. If a signal strength detected on the unlicensed spectrum is greater than the energy detection threshold, an access to the unlicensed spectrum is disabled. If the signal strength detected on the unlicensed spectrum is not greater than the energy detection threshold, the access to the unlicensed spectrum is performed. Accordingly, the chance that a data transmission collision occurs is decreased, and a utilization rate of the unlicensed spectrum is improved.

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Taipei, Taiwan

Kun-Lin Chiang