Nec Corporation

Emiko Sakuma

Motoya Iwasaki

Hisashi Kawabata

Osami Nishimura

Yukio Haseba

Daisuke Kondo

Daisuke Kondou

A radio base station which receives a first and a second communication channel from a radio communications device comprises a control circuit for detecting the reception quality of the first communication channel, conducting an inner-loop power control for controlling transmission power of the first communication channel from the radio communications device based on the reception quality and an inner-loop power control target value, and adding a power control offset to the inner-loop power control target value before starting a communication through the second communication channel.

Radio communications system and control method therefor

An active set control method for handover operation in a CDMA communications system in which propagation conditions of an uplink channel and a downlink channel for an access link of cell are different, provides that when a cell is deleted from the active set based on a request of a base station which has detected a degraded signal of the uplink channel, a predetermined period of time is to be counted for inhibiting addition of the same cell in the active set based on a request of a mobile terminal which has detected a satisfied signal of the downlink channel, thereby preventing the deletion and addition of the cell in the active set from successive operations in a short time.

Mobile communications system, radio network controller, and active set control method

A synchronous acquisition device for a small-circuit-scale CDMA receiver is provided. The synchronous acquisition device for a CDMA receiver, which receives as a receiver signal a spectrum-spread signal generated by spectrum-spreading, using a spreading code, transmission data including one of first to mth pieces (m: an integer 2 or more) of fixed data, comprises, for each of a plurality of paths into which the receiver signal is branched, a multiplier () for multiplying the receiver signal by the spreading code, an integrator () for one-symbol-time integrating an output signal from the multiplier (), fixed data sequential output units (to) having the first to mth pieces of fixed data and sequentially outputting the first to mth pieces of fixed data, and a second multiplier () for multiplying an output signal from the integrator () by the first to mth pieces of fixed data sequentially outputted from the fixed data sequential output units.

Growing community of inventors

Tokyo, Japan

Emiko Sakuma