Wireless base station device

A wireless base station, comprising:

• a wireless unit for performing wireless communications with a mobile station and other wireless base stations;
• a reception memory unit for storing therein reception spectrum spread data per sample as reception data, wherein the reception spectrum spread data is received by the wireless unit and sequentially sampled;
• a baseband reception unit for processing and decoding the reception data accumulated in the reception memory unit;
• a common downlink channel reception unit, activated at a start-up of said wireless base station, for receiving a downlink signal of one or more said other base stations by using the reception data stored in the reception memory unit;
• a frame protocol processing unit including an interface for communicating with a wired transmission line for an upper-level device, for performing a frame protocol processing for the interface to convert a transmission channel format with respect to an uplink signal received by the baseband reception unit and a downlink signal transmitted from the upper-level device;
• a baseband transmission unit for encoding downlink data outputted from the frame protocol processing unit, and digitally modulating to output encoded data;
• a spread processing unit for spread-modulating the encoded data outputted from the baseband transmission unit to output spread-modulated data to the wireless unit;
• and
• a call controller for controlling an allocation of processing resources for each of the units when a new call is received by said wireless base station,
• wherein, at a start-up of said wireless base station, at least a part of a baseband signal processing is converted into a reception process for receiving the downlink signal from said other base stations, and said other base stations are searched, so that, if an effective cell detected, a transmission frequency of the wireless unit is set to be identical to a frequency of the effective cell, and a spreading code used for the spread processing unit is set to be different from that of the effective cell based on each of neighboring cell information including a list of scramble codes used by neighbor base stations, said neighboring cell information being notified from said other base stations and being acquired from the downlink signal received by said common downlink channel reception unit.

A wireless base station device, comprising:

• a wireless unit for performing wireless communications with a mobile station and other wireless base station devices;
• a reception memory unit for storing therein reception spectrum spread data per sample as reception data, wherein the reception spectrum spread data is received by the wireless unit and sequentially sampled;
• a baseband reception unit for processing and decoding the reception data accumulated in the reception memory unit;
• a frame protocol processing unit including an interface for communicating with a wired transmission line for an upper-level device, for performing a frame protocol processing for the interface to convert a transmission channel format with respect to an uplink signal received by the baseband reception unit and a downlink signal transmitted from the upper-level device;
• a baseband transmission unit for encoding downlink data outputted from the frame protocol processing unit, and digitally modulating to output encoded data;
• a spread processing unit for spread-modulating the encoded data outputted from the baseband transmission unit to output spread-modulated data to the wireless unit;
• and
• a call controller for controlling an allocation of processing resources for each of the units when a new call is received by the wireless base station device;
• wherein, at a start-up of the wireless base station device, at least a part of a baseband signal processing is converted into a reception process for receiving a downlink signal from other base station devices, and other base station devices are searched, so that, if an effective cell detected, a transmission frequency of the wireless unit is set to be identical to a frequency of the effective cell,
• wherein a spreading code used for the spread processing unit is set to be different from that of the effective cell based on scramble codes included in notification information of the effective cell,
• wherein a transmission power of the wireless base station device is determined based on signal levels of the other base station devices measured at the wireless base station device, and
• wherein the transmission power is determined higher than the signal levels of the other base station devices measured at the wireless base station device.