Abstract: A communication terminal apparatus includes: an assigning part configured to assign a usage right of a first subframe, from among a plurality of subframes included in a frame, to a base station, in a case where terminal-to-terminal communication is performed by transmission and reception of the frame directly with a different communication terminal apparatus, based on frequency information reported from the base station; and an acquiring part configured to acquire, during the terminal-to-terminal communication, information from the base station from the first subframe.

Abstract: A wireless communication apparatus includes an acquisition unit, a calculation unit, a selection unit, and a notification unit. The acquisition unit acquires location information of a first terminal and a second terminal that perform terminal-to-terminal communication without using a base station. The calculation unit calculates a distance between the first and second terminals based on the acquired location information of the first and second terminals. The selection unit selects a frequency to be used for the terminal-to-terminal communication based on the distance calculated by the calculation unit. The notification unit notifies the first and second terminals of a start of the terminal-to-terminal communication and the selected frequency.

Abstract: A wireless terminal includes a small cell information data base, an acquisition unit, and a communication unit. The small cell information data base stores small cell information including position information and frequency information to be used when performing a wireless communication. The acquisition unit obtains current position information. The communication unit performs a wireless communication in a small cell by using frequency information obtained from the small cell information data base based on the current position information.

Abstract: A communication terminal apparatus includes: an assigning part configured to assign a usage right of a first subframe, from among a plurality of subframes included in a frame, to a base station, in a case where terminal-to-terminal communication is performed by transmission and reception of the frame directly with a different communication terminal apparatus, based on frequency information reported from the base station; and an acquiring part configured to acquire, during the terminal-to-terminal communication, information from the base station from the first subframe.

Abstract: A wireless communication apparatus includes an acquisition unit, a calculation unit, a selection unit, and a notification unit. The acquisition unit acquires location information of a first terminal and a second terminal that perform terminal-to-terminal communication without using a base station. The calculation unit calculates a distance between the first and second terminals based on the acquired location information of the first and second terminals. The selection unit selects a frequency to be used for the terminal-to-terminal communication based on the distance calculated by the calculation unit. The notification unit notifies the first and second terminals of a start of the terminal-to-terminal communication and the selected frequency.

Abstract: A disclosed apparatus is a portable terminal apparatus. This apparatus includes: a determination unit that determines whether switching from a connection with a first wireless communication system to a connection with a second wireless communication system is effective, based on a communication state with a first base station apparatus included in the first wireless communication system or a moving state of the portable terminal apparatus itself; a transmission unit that transmits, upon determining that the switching is effective, a message to inquire a second base station apparatus included in the second wireless communication system, to the first base station apparatus, and omits, upon determining that the switching is not effective, the transmission; and a search unit that search, upon receiving data for searching for the second base station apparatus from the first base station apparatus, for the second base station apparatus according to the received data.

Abstract: A terminal includes a communication device and a processor connected to the communication device. The communication device is configured to conform to first and second communication schemes where the second communication scheme enables communication at a higher communication speed than the first communication scheme and has a narrower service area than the first communication scheme. The processor switches a prioritized scheme from the second communication scheme to the first communication scheme in a case where some of a plurality of signals including emergency information and sequentially notified according to each of the first and second communication schemes are received by the communication device when the prioritized scheme to be preferentially used is the second communication scheme, and returns the prioritized scheme from the first communication scheme to the second communication scheme in a case where the signal is not received for a predetermined time period in the first communication scheme.

Abstract: A mobile terminal includes a receiving unit configured to enable reception of a wireless signal by concurrently using a cell of a first frequency bandwidth and a cell of a second frequency bandwidth that is different from the first frequency bandwidth, where the cell of the second frequency bandwidth having a range that is smaller than the cell of the first frequency bandwidth; a measuring unit configured to measure reception quality of each cell of the second frequency bandwidth; a setting unit configured to set among the cells of the second frequency bandwidth and based on a result of measurement, a cell that is to be used by the receiving unit; a detecting unit configured to detect a movement speed of the mobile terminal; and a control unit configured to terminate the measurement when the detected movement speed exceeds a predetermined speed.

Abstract: A mobile terminal includes a receiving unit that is configured to enable reception of a wireless signal by concurrently using a first cell of a first frequency bandwidth and a second cell of a second frequency bandwidth that is different from the first frequency bandwidth, the second cell having a range that is smaller than the first cell; and a processor that is configured to detect a movement speed of the mobile terminal, and shift the receiving unit to a second state when the detected movement speed falls below a predetermined speed during a first state in which the receiving unit receives the wireless signal by using at least the first cell, the second state being a state in which the receiving unit receives the wireless signal by using the second cell without using the first cell.

Abstract: A communication system includes a mobile terminal that can receive wireless signals by concurrently using cells respectively of a first and a second frequency bandwidth, the latter cell having a range narrower than the former cell. The mobile terminal further transmits state information that indicates at least the presence/absence of power supply to the mobile terminal or the remaining battery amount of the mobile terminal. The communication system further includes a control apparatus that allocates communication resources for the wireless signal that is transmitted by a base station to the mobile terminal. The control apparatus switches according to the state information transmitted by the mobile terminal, a first allocation process of allocating the first and the second frequency bandwidths for the wireless signal and a second allocation process of allocating the first frequency bandwidth or the second frequency bandwidth for the wireless signal.

Abstract: A wireless communication device includes a memory, and a processor coupled to the memory and configured to specify a timing for transmitting a signal for requesting information about a second base station that is used for voice data communication when conducting outgoing or incoming voice communication while conducting communication through a first base station that is used for data communication other than voice communication, transmit, in accordance with the specified timing, the signal for requesting the information about the second base station, and adjust by advancing the specified timing when a request for conducting incoming or outgoing voice communication is received.

Abstract: A wireless communication device includes a memory, and a processor coupled to the memory and configured to extract a control code from a signal received through a first communication system that has lower priority than a second communication system prior to carrying out communication through the second communication system, compare the extracted control code with a given control code stored in the memory, determine whether the extracted control code matches the given control code, and cause a communication device that is configured to carry out communication through the second communication system to stop processing for establishing a wireless communication when the processor determines that the extracted control code does not match the given control code.

Abstract: A wireless terminal apparatus includes a first communicator, a second communicator, a memory, and a processor coupled to the memory and configured to, measure a reception level, while a communication to the second communication network is established in a state where a power supply of the first communicator is set as off and also a power supply of the second communicator is set as on, switch the power supply of the first communicator from off to on when the reception level is lower than a first threshold, and switch the communication destination from the second communication network to the first communication network and switch the power supply of the second communicator from on to off when the reception level is lower than a second threshold that is lower than the first threshold.

Abstract: A disclosed wireless terminal includes a determination unit that determines whether or not the wireless terminal is outside of a communication area that is connectable with a first telecommunication network by radio; and a search unit that omits search for a base station or access point that relays communication with the first telecommunication network, upon determining that the wireless terminal is outside of the communication area. The aforementioned determination unit may further identify that the wireless terminal is inside of the communication area, and the search unit may further search for the base station or access point upon identifying that the wireless terminal is inside of the communication area.

Abstract: A disclosed method includes: determining whether or not a wireless portable terminal is in a wireless communication range of a network, wherein the wireless portable terminal includes a device that includes an arithmetic unit and a volatile memory and controls communication with the network; and upon determining that the wireless portable terminal is not in a wireless communication range of the network, stopping power supply for a portion of the device in a state that a program for causing the arithmetic unit to execute a processing to search a base station or access point in the network is kept in the volatile memory.

Abstract: A multi wireless system 1 is enabled for communication by CDMA2000 1x of a circuit switching system and by CDMA2000 1xEV-DO and LTE of a packet communication system. The detecting units 54B and 54C detect whether communication by CDMA2000 1xEV-DO and LTE is enabled. The notifying unit 69 notifies an SMS switching control server of which of the circuit switching system and the packet communication system is used to perform SMS communication based on a detection result.

Abstract: A CPU of a multi-mode wireless terminal capable of performing wireless communication using a plurality of communication systems including the LTE system determines whether an SMS with a command instructing to perform OTA setting is received from a network. When the SMS is received, the CPU performs the OTA data communication using communication by the LTE system by priority. When OTA data is received through the communication by the LTE system, the CPU stores the OTA data in a UICC. The CPU further executes a processing operation based on the OTA data stored in the UICC in response to a refresh instruction.

Abstract: CPU in a multi-wireless terminal, that allows simultaneous wireless communication for communication of a 1x system and communication of an LTE system, executes a process of monitoring a protocol state for the communication of the 1x system. When the protocol state for the communication of the 1x system is during transmission, the CPU executes a process of performing maximum value control for limiting a maximum value of transmission power for the communication of the LTE system. Moreover, when the protocol state for the communication of the 1x system is any state other than during the transmission, for example, during idle or during position registration operation, the CPU executes a process of stopping the maximum value control.

Abstract: 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.

Abstract: 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.