Abstract: An access terminal receives, from a base station 10, an access terminal identifier (MAC-ID) assigned thereto to identify a self-terminal and information (Semi Connected Permit MAC-ID List) to permit a shift into a semi connected state where an access terminal 17 saves power while holding the access terminal identifier. When the access terminal 17 determines to be shifted into the semi connected state, the access terminal 17 transmits a request (Semi Connected Start Request) to the base station 10 to be shifted into the semi connected state based on the received information to permit the shift into the semi connected state and the access terminal identifier assigned to the self-terminal.

Abstract: The present invention is summarized as a radio communication method including the steps of calculating a transmission power difference between a transmission power value of a first carrier and a transmission power value of a second carrier; determining whether or not the transmission power difference exceeds a threshold which indicates a maximum transmission power difference allowable between the first carrier and the second carrier; and decreasing a data rate for transmission via one of the first carrier and the second carrier that has the higher transmission power value when the transmission power difference exceeds the maximum transmission power difference.

Abstract: A method includes the steps of calculating a transmission power difference between a first carrier and a second carrier, and determining whether or not the transmission power difference exceeds a threshold set up on the basis of a maximum transmission power difference allowable between the first carrier and the second carrier. When the transmission power difference exceeds the threshold set up on the basis of the maximum transmission power difference, the transmission power of the first carrier or the second carrier is controlled while maintaining the transmission power difference within the maximum transmission power difference and not complying with power control information corresponding to the first carrier or the second carrier.

Abstract: In a base station device (30) for performing wireless communications with a plurality of mobile station devices (20) by using a frame that includes a plurality of uplink time slots and a plurality of downlink time slots that correspond to these uplink time slots, the base station device includes a time slot assignment part (37) for assigning to respective channels a time slot set constructed from uplink time slots and downlink time slots within a frame; and a part (39) for specifying, among the one or more channels to which a time slot set has been assigned by the time slot assignment part (37), channels that do not use uplink time slots whereby a channel that does not use an uplink time slot is specified. The time slot assignment part (37) assigns an uplink time slot assigned to the channel specified by the part (39) for specifying channels that do not use uplink time slots to a channel other than the specified channel.

Abstract: A gist of the present invention is a radio communication method including the steps of calculating a transmission power difference between transmission power of a first carrier and transmission power of a second carrier, determining whether or not the transmission power difference exceeds a threshold that is set up on the basis of a maximum transmission power difference allowable between the first carrier and the second carrier, and disconnecting any one carrier out of the first carrier and the second carrier when the transmission power difference exceeds the threshold set up on the basis of the maximum transmission power difference.

Abstract: A radio communication method includes the steps of: calculating a transmission power difference between a first carrier and a second carrier; determining whether or not the transmission power difference exceeds a threshold set up on the basis of a maximum transmission power difference allowable between the first carrier and the second carrier; and stopping transmission of power control information being an instruction to increase transmission power of the carrier having higher transmission power out of the first carrier and the second carrier when the transmission power difference exceeds the threshold set up on the basis of the maximum transmission power difference.

Abstract: The present invention is summarized as a radio communication method including the steps of: calculating a transmission power difference between a transmission power value of a first carrier and a transmission power value of a second carrier; determining whether or not the transmission power difference exceeds a threshold set on the basis of a maximum transmission power difference allowable between the first carrier and the second carrier; and when the transmission power difference exceeds the threshold set on the basis of the maximum transmission power difference, transmitting a handoff instruction for one of the first carrier and the second carrier that has a higher transmission power value.

Abstract: A base station and a mobile unit and method for controlling them can retransmit a request for transition without any useless transmission. The base station receives from the mobile unit a request for transition of the mobile unit to a semi connected state in which the mobile unit comes into a power saving state, while holding a mobile unit identifier assigned for identifying the mobile unit by the base station, and the base station determines the state of the base station in response to the request. The base station transmits to the mobile unit a response to the request together with a reason for disallowance attached to the response when the request for transition is not allowable as a result of the determination of the state of the base station. The mobile unit controls the transmission of the request for transition according to the reason for disallowance.

Abstract: There is disclosed an information processing system having plural IC tags (e.g. RFID tags), each of which transmits back a signal in response to an interrogatory signal sent from a cell phone acting as an interrogator. The information processing system includes the RFID tags and the cell phone. The cell phone transmits an interrogatory signal to the tags to read information from the tags. Each tag receiving the interrogatory signal transmits positional information stored in the tag to the cell phone in response to the interrogatory signal. The cell phone transmits a specific interrogatory signal including at least one of the transmitted sets of positional information. Each tag receiving the specific interrogatory signal makes a decision as to whether the positional information contained in the specific interrogatory signal matches the positional information stored in the tag itself.

Abstract: A communication device and method is provided which enables effective voice communications. An error detection unit (102) within a base station device (100) detects transmission line errors of an encoded voice frame data from a terminal (200). A voiced-or-unvoiced discrimination unit (104) determines whether or not the encoded voice frame data corresponds to the voiced section. If a transmission error is contained in the encoded voice frame data and the encoded voice frame data corresponds to the voiced section, a retransmission request discrimination unit (105) causes the terminal (200), within the 20 ms frame time corresponding to the encoded voice frame data, to return NAK as a retransmission request and retransmit the encoded voice frame data, using forward communication time slots in a retransmission 5-ms frame.

Abstract: When a vehicle detects that it has been rendered in a prescribed state, the vehicle acquires prescribed state detection position data indicating a position where the vehicle is located when it detects the prescribed state and prescribed state detection time data indicating a time of the detection of the prescribed state. The vehicle sends, to a recording apparatus, a request message that contains the position data and the time data.

Abstract: There is disclosed an information processing system having plural IC tags (e.g. RFID tags), each of which transmits back a signal in response to an interrogatory signal sent from a cell phone acting as an interrogator. The information processing system includes the RFID tags and the cell phone. The cell phone transmits an interrogatory signal to the tags to read information from the tags. Each tag receiving the interrogatory signal transmits positional information stored in the tag to the cell phone in response to the interrogatory signal. The cell phone transmits a specific interrogatory signal including at least one of the transmitted sets of positional information. Each tag receiving the specific interrogatory signal makes a decision as to whether the positional information contained in the specific interrogatory signal matches the positional information stored in the tag itself.

Abstract: A wireless communications system comprises a control apparatus (AA server) for controlling subscriber information, base stations (BS1, BS2), and mobile stations (MS1, MS2), wherein the control apparatus includes: a controlling unit for controlling priorities corresponding to fixed identifiers of mobile stations; the mobile station includes: a transmitting unit for transmitting the fixed identifier of a mobile station to a target base station, to which the mobile station is connected, when being connected to the base station; and the base station includes: a receiving unit for receiving the fixed identifier of a mobile station from the mobile station; and an allotting unit for allotting an identifier in an area corresponding to the priority of the corresponding mobile station to the mobile station on the basis of the received fixed identifier and control information of the controlling unit.

Abstract: A sound communication system in which sound information is transmitted and received via an internet protocol network, has a terminal of a transmission side having an encoding unit which encodes the sound information at a predetermined section of a frame unit, and a packetizing unit which packetizes the sound data of the frame unit which is encoded in the encoding unit while thinning out a predetermined frame, and a terminal of a reception side having a receiving unit which receives the encoded sound data which is packetized, and a decoding unit which decodes the encoded sound data which is received by the receiving unit while complementing the encoded sound data which is received at the predetermined frame unit.

Abstract: In a CDMA protocol wireless telecommunication system that allows mixed use of single carrier terminals and multiple carrier terminals, a wireless telecommunication system that can improve the utilization efficiency of the frequencies is realized. A wireless base station, single carrier terminals, multiple carrier terminals are provided, and the frequency channels are formed by a plurality of time slots, and the base station sets a preamble signal that indicates the terminal allocated to a time slot. At the same time, preamble signals for a plurality of frequency channels are transmitted nonsimultaneously. The single carrier terminal receives the preamble signals by switching the plurality of frequency channels transmitted from the wireless base station, and detects the received time slots based on the received preamble signal.

Abstract: A wireless communication apparatus having an antenna and a control portion for controlling directivity of the antenna and communicates with a base station. The antenna is an adaptive antenna having a plurality of antenna elements and a phase shifter for changing a phase of electric power supplied to the antenna elements, and the control portion performs switching control so that directivity of the antenna is set to beam steering or null steering based on a control signal from the base station. The wireless communication apparatus properly controls the adaptive antenna by making a change in proper parameters, a change in control priority and a change in weighting.

Abstract: In a CDMA wireless communication system equipped with a base station, and at least one of wireless communication terminals which performs packet communications with respect to the base station by using at least one carrier, and wireless communication terminals which performs packet communications with respect to the base station by using a plurality of carriers at the same time.