摘要:
A wireless communication unit is configured to perform data communication using a first wireless access network and data communication using a second wireless access network having a larger coverage area than a coverage area of the first wireless access network. A control unit is configured to perform a handover from the first wireless access network to the second wireless access network after the data communication using the first wireless access network is finished, and subsequently cause a mobile communication apparatus to enter into standby mode.
摘要:
A control unit controls a 1x RAKE receiving unit to intermittently receive a paging signal transmitted from a first base station in a first cycle, in the first cycle. The control unit also controls a 1xEV-DO RAKE receiving unit to intermittently receive a paging signal transmitted from a second base station in a second cycle, in a cycle which is a multiple of natural number n of the second cycle.
摘要:
A control unit controls a 1× RAKE receiving unit to intermittently receive a paging signal transmitted from a first base station in a first cycle, in the first cycle. The control unit also controls a 1× EV-DO RAKE receiving unit to intermittently receive a paging signal transmitted from a second base station in a second cycle, in a cycle which is a multiple of natural number n of the second cycle.
摘要:
A control unit detects a system timing from a Sync message received from a 1x base station, controls a 1x RAKE receiving unit, a 1x spreading unit, a 1xEV-DO RAKE receiving unit, and a 1xEV-DO spreading unit on the basis of detected system timing, and controls a transmit-receive timing with the 1x base station and a transmit-receive timing with the 1xEV-DO base station.
摘要:
A multiplier multiplies a baseband signal with a scramble code generated by a CPICH scramble code generator and an integrator integrates the result of the multiplication. A symbol selection control unit controls the integrator such that the integrator integrates each of two successive slots in which combinations of the symbols transmitted from two antennas of a base station are the same, in accordance with the information about the synchronous positions of the slots and frames. The result of the integration is delayed by a 1-symbol delay unit and then a code of a complex component is inverted by a complex conjugate unit. A multiplier multiplies the outputs of the integrator and complex conjugate unit, which are shaped in a complex number, to obtain an amount of phase rotation between the successive symbols, i.e. a frequency error.
摘要:
According to the system of the present invention, in a base station, a radio transmission characteristic of a forward link is estimated by a parameter estimating section 18b based on a receiving state of a radio signal arrived from a mobile station through a reverse link. Then, RAKE control data to be set to a RAKE receiver of the mobile station is generated based on the result of the estimation, and RAKE control data is notified to the mobile station. On the other hand, in the mobile station, RAKE control data is extracted by a RAKE control data extracting section. Then, a tap coefficient is initialized to be set to a transversal filter of the RAKE receiver based on RAKE control data.
摘要:
A spread spectrum radiocommunication device includes a plurality of digital data demodulators which are independently operated to track the paths of a multipath radio signal transmitted from a to-be-communicated device and PN code generators each of which has a ROM storing PN codes and which are respectively provided in the digital data demodulators. In a control section, a ROM address latched by an address latch circuit is monitored and a PN address relative value is generated, and the PN address relative value is added to a basic address generated from an address counter in an address adder and the added address is supplied to the PN code ROM to generate a PN code.
摘要:
If a control unit detects that it is located outside the service area, searching for a base station on the basis of information stored in a first list storage area is conducted with a certain cycle by a first searching means and searching for a base station on the basis of information stored in a second list storage area is conducted in a gradually extended cycle, in accordance with the number of times Cs of searching for the base station, by a second searching means.
摘要:
A mobile station includes a paging processing unit which extracts a calling signal included in radio signals and determines whether or not existing an incoming call to own mobile station by analyzing the calling signal in operation with an idle mode in which the radio signals from the base station are received during a predetermined period for every first cycle, and a signal quality measuring unit which measures quality of received radio signals for every second cycle which is two or more times the first cycle from among the radio signals received for every first cycle, but does not measure the quality of the radio signals received at a timing other than the second cycle.
摘要:
In a mobile communication system, a mobile station notifies a first base station of a first holding period when a first mode, in which the mobile station performs wireless communication with one of the first base station and a second base station, is set, and notifies the first base station of a second holding period which is longer than the first holding period when a second mode, in which the mobile station performs wireless communication with the first base station and does not performs wireless communication with the second base station, is set. The first base station discards connection information when the notified holding period has elapsed after the mobile station is unable to perform the wireless communication with the first base station.