摘要:
In a radio communication such as a radio telephone system or the like, a transmission channel which can accommodate a change in a transmission capacity is set. While a terminal apparatus and a base station are in communication for transmitting a predetermined information using a predetermined transmission channel, a signal requesting to set another transmission channel is transmitted using a part of the predetermined transmission channel to initiate communication between the terminal apparatus and the base station through the other transmission channel.
摘要:
In order cope with a change of the transmitting capacity in a wireless telephone system. A number of transmission channels are set within the transmission frequency band prepared for each base station. When a communication is made between the terminal equipment and the base station through the transmission channels, at least a first transmission channel and a second transmission channel are set as the transmission channel depending on a class of information to be transmitted. The first transmission channel is set to have a fixed transmitting capacity and the second transmission channel is set so that the minimum transmitting capacity may be defined and the transmitting capacity greater than the minimum transmitting capacity may be set depending on the setting condition of the transmission channels within the transmission frequency band prepared.
摘要:
A mobile radio communication system of the cellular system wherein a base station and a mobile station are connected to each other. Particularly, a mobile radio communication system wherein transmission power control is performed by a base station constructed such that, at least with regard to a control signal, soft hand-off control wherein a mobile station and base stations are connected simultaneously to each other is performed, but with regard to any other signal other than the control signal, hard hand-off control is performed. By the construction, the communication capacity of the entire system can be increased and the stability can be maintained.
摘要:
A cellular wireless communication system for further improving the quality of communications. The base station (BS11) notifies the communication channel which the mobile station (MS10) is using, to the base stations (BS12, BS13) having the lower pathloss than the own station, the base stations receive said communication channel and transmit the reception signals (S2, S3) to the connection switching station (11), and the connection switching station combines respective reception signals (S1-S3) to be transmitted so as to restore the data transmitted from the mobile station, and thereby the reception signal received at the base station having the satisfactory receiving condition can be combined and the diversity reception using the whole system can be conducted, so that the quality of communications from the mobile station to the base station can be easily improved.
摘要:
A control information transmitting method for controlling transmission power, wherein a control symbol obtained by assigning control information for controlling transmission power to symbols of phase modulation is transmitted to a communication partner so as to control the transmission power of the communication partner, the control information which represents raising the transmission power of communication partner and the control information which represents lowering the transmission power of the communication partner are assigned to a pair of symbols having the longest Euclidian distance among the symbols of phase modulation. Whereby, even if receiving noise or interference are present during transmission, the control information can be prevented from being misjudged because the distance on the signal constellation is farthest apart from each other, so that the control information can be transmitted exactly.
摘要:
A mobile radio communication system of the cellular system wherein a base station and a mobile station are connected to each other. Particularly, a mobile radio communication system wherein transmission power control is performed by a base station constructed such that, at least with regard to a control signal, soft hand-off control wherein a mobile station and base stations are connected simultaneously to each other is performed, but with regard to any other signal other than the control signal, hard hand-off control is performed. By the construction, the communication capacity of the entire system can be increased and the stability can be maintained.
摘要:
A communication apparatus capable of increasing a bit rate of communication in the down direction by using an existing bidirectional communication system, wherein mobile management, call control, wireless management, etc. are performed and communication conditions are controlled by bidirectional communication between a high speed downlink base station and a high speed downlink control portion of a terminal device via a cellular network and a cellular base station. Then, a content signal is transmitted from the high speed downlink base station to the terminal device via the high speed downlink network.
摘要:
A control information assigning method whereby control information can be accurately transmitted. Present control information and past control information are formed into a pair to be assigned to one transmission symbol, so that a prescribed restricted condition is applied to the transmission symbol. Thereby, an error correction capability can be added to the transmission symbol and thus, the control information can be accurately transmitted.
摘要:
When multiplexing channels which conduct communication at various transmission rates, each communication is made capable of conducting communication processing, such as information reception, with a minimum required processing amount needed by itself. A plurality of communication channels are set in a predetermined band, and communication in each of the set channels is performed by using a multi-carrier signal having transmission symbols distributed among a plurality of subcarriers. Transmission symbols of each channel on a frequency axis are arranged at intervals of an Nth power of 2 (where N is an arbitrary positive number) with respect to a reference frequency interval for transmission. From the transmission signal, a signal component of a required channel is received.
摘要:
Efficient radio communication is implemented in a usage pattern desired by users. A cellular phone as mobile radio communication apparatus communicates by air with a base station as fixed radio communication apparatus (Step S1). When the cellular phone detects that the cellular phone is positioned at the fringe of the cell of the base station (Step S3), the cellular phone independently makes adjustment to lower the transmission power according to the judgment of the cellular phone itself in correspondence with the received power from the base station (Step S11). Further, the cellular phone lowers the bit rate of transmission data in correspondence with the adjusted transmission power (Step S12). The present invention is applicable to information processors, such as cellular phones, PDAs, and mobile terminals, provided with a radio communication function.