Nec Corporation

Siemens Aktiengesellschaft

Huawei Technologies Co., Limited

Telefonaktiebolaget Lm Ericsson (publ)

Nortel Networks Corporation

Ntt Docomo, Inc.

Nokia Solutions and Networks Gmbh & Co. Kg

Kenichiro Yagawa

Toshifumi Sato

Jacob Österling

Hizuru Nawata

Armin Splett

Jacob Kristian Osterling

Eric Georgeaux

Thomas Ostman

Thomas Östman

Werner Korte

Tomoyuki Teramoto

Hans Kröner

Lan Haiqing

Ken Kasagi

Lin Zhibin

Yang Ganghua

Patrick Lagrange

Peter Merz

Torbjörn Aarflot

Bernd Hassler

Torbjöm Aarflot

Hans KRÖNER

An interface, apparatus, and method are described for communication between a radio control (REC) node and first and second radio equipment (RE) nodes in a radio base station that transceives information over radio interface using multiple antenna carriers. The REC node is separate from and coupled to the first RE node by a first transmission link, and the second RE node coupled to the first RE by a second transmission link. Both control information and user information intended for communication between the REC node and the first RE node and the REC and the second RE node are conveyed over the first transmission link. The first RE node also conveys information between the REC and second RE node. Many advantageous features are described.

Interface, apparatus, and method for communication between a radio equipment control node and one or more remote radio equipment nodes

To enable CPU-to-CPU communication without requiring a special circuit between a baseband signal processing panel and RF signal processing panels, and to allow transmission of reference frame, frame timing and reference clock without requiring other physical interface. According to a W-CDMA base station apparatus of the present invention, in a baseband signal processing panel, at least one signal of a CPU-to-CPU communication signal, a frame timing signal, signals indicating frame number and the reference clock are multiplexed into a baseband signal and transmitted to RF panelsto. In the RF panelsto, at least one signal of signals such as the frame-timing signal, CPU-to-CPU communication signal, and the like is multiplexed with a demodulated digital signal and transmitted to the BB panel

CDMA base station apparatus

A cellular radio communication system, a cellular radio communication method and a rake reception method for raising the efficiency of a baseband, and increasing the freedom of the structure of the radio base station. A cellular radio communication system comprises a baseband and first to Nth transmitter-receicvers connected by a transmission line. The baseband is provided with a modulator for producing, by a digital process, modulation signals to be sent from the first to Nth transmitter-receivers, and a demodulator for demodulating digital modulation signals received and analog-to-digital converted by the first to Nth transmitter-receivers. The transmitter-receiver is provided with a digital-to-analog converter for converting a digital modulation signal to a modulation signal to be sent, and an analog-to-digital converter for converting a received modulation signal to a digital modulation signal.

Cellular radio communication system cellular radio communication method and rake reception method

A radio communication apparatus transmits signals between an outdoor unit and an indoor unit which are connected to each other through a cable. This apparatus includes a variable level adjustment circuit in the indoor unit. In the apparatus, the fixed level difference of a reception signal due to the installation parameters of a reception system is eliminated, and the reception signal is adjusted to make the reception signal level become equal to a predetermined standard input level.

Radio communication apparatus

Growing community of inventors

Tokyo, Japan

Kenichiro Yagawa