摘要:
A system of controlling transmit power of a base station where a terminal device having a receive diversity function is wirelessly connected includes a power information generation part to generate transmit power control information that corresponds to variation in reception characteristics of the terminal device when a receive diversity state is switched; and a transmit power control part to control transmit power of a downstream signal based on the transmit power control information.
摘要:
A wireless terminal using switchable first and second reception antennas to perform diversity reception of data transmitted from a base station is proposed. The terminal includes an average value calculation unit that calculates an average value of a reception level measurement result of the first reception antenna and a reception level measurement result of the second reception antenna; and a correction unit that corrects the average value calculated on the basis of a predetermined thermal noise level, a received RSSI value measurement result of the first reception antenna, and a received RSSI value measurement result of the second reception antenna.
摘要:
A communication system includes a first base station for communicating complying with a first communication protocol, a second base station for communicating by using radio frames complying with a second communication protocol and transmitting synchronization signals complying with the first communication protocol, the synchronization signals synchronizing the transmitted radio frames, and a mobile terminal for communicating according to the process includes: receiving the synchronization signals from the second base station while communicating with the first base station, estimating transmitting timing of the radio frames including symbols on the basis of the received synchronization signals, measuring a receiving signal strength of the symbol on the basis of the estimated timing, and controlling a handover from the first base station to the second base station on the basis of the measurement result by the measurement of the receiving signal strength of the symbol.
摘要:
A data transfer device having a data transmission side to receive an error detection signal transmitted thereto when an error is detected within data transmitted therefrom. It is decided whether to receive an error detection signal relating to the data transmitted therefrom and retransmission of the data is controlled depending upon the result of this determination. A data receiving side to detect an error in data transmitted thereto, to detect whether there is an error in the data received and, if there is an error in the data received, the data receiving side is capable of receiving data which generates an error detection signal depending upon the degree of the error. Therefore, when an error is detected from transfer data received, it will be possible to re-transfer the data using the address data for the transmission source.
摘要:
A multi-wireless communication device includes: a plurality of communication controllers for controlling communication of a plurality of corresponding different systems, respectively; a plurality of counters for counting communication frames having different frame periods that depend on the systems, respectively; a common counter for counting in a predetermined period; a first converter for converting a count value of one of the counters corresponding to one of the systems under communication into a common count value of the common counter to determine the end of the communication under the one of the systems; and a second converter for converting a count value of the other of the counters into another common count value to determine a system switch period from the one of the systems to the other of the systems beginning from the end of the communication under the one of the systems.
摘要:
A wireless terminal using switchable first and second reception antennas to perform diversity reception of data transmitted from a base station is proposed. The terminal includes an average value calculation unit that calculates an average value of a reception level measurement result of the first reception antenna and a reception level measurement result of the second reception antenna; and a correction unit that corrects the average value calculated on the basis of a predetermined thermal noise level, a received RSSI value measurement result of the first reception antenna, and a received RSSI value measurement result of the second reception antenna.
摘要:
A system of controlling transmit power of a base station where a terminal device having a receive diversity function is wirelessly connected includes a power information generation part to generate transmit power control information that corresponds to variation in reception characteristics of the terminal device when a receive diversity state is switched; and a transmit power control part to control transmit power of a downstream signal based on the transmit power control information.
摘要:
A communication system includes a first base station for communicating complying with a first communication protocol, a second base station for communicating by using radio frames complying with a second communication protocol and transmitting synchronization signals complying with the first communication protocol, the synchronization signals synchronizing the transmitted radio frames, and a mobile terminal for communicating according to the process includes: receiving the synchronization signals from the second base station while communicating with the first base station, estimating transmitting timing of the radio frames including symbols on the basis of the received synchronization signals, measuring a receiving signal strength of the symbol on the basis of the estimated timing, and controlling a handover from the first base station to the second base station on the basis of the measurement result by the measurement of the receiving signal strength of the symbol.