Patent application number | Description | Published |
20090291644 | WIRELESS COMMUNICATION APPARATUS - A wireless communication apparatus is provided. The apparatus includes a wireless transceiver which conducts communication with another wireless communication apparatus using a channel belonging to a first band of a plurality of frequency bands, and a switching unit which switches the channel being used by the wireless transceiver to a different channel of a second band of the plurality of frequency bands other than the first band. | 11-26-2009 |
20130272277 | WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION DEVICE - In a wireless communication system that conducts a communication between a base station and a terminal the base station includes a first communication unit using a first communication system of a TDMA system, and a second communication unit using a second communication system, and the terminal includes a third communication unit using the first communication system, and a fourth communication unit using the second communication system. The base station transmits a control signal in the first communication system with the use of the first communication unit, and the base station determines timing of transmission for the second communication unit according to timing of TDMA of the first communication unit. The third communication unit receives the control signal transmitted from the base station in the first communication system, and the fourth communication unit controls receiving operation according to information included in the control signal. | 10-17-2013 |
20130279483 | BASE STATION APPARATUS, COMMUNICATION SYSTEM AND SYNCHRONIZATION METHOD - A base station apparatus includes a wireless communication unit, a wired communication unit, and a communication timing correction unit. If the wireless communication unit fails to receive a synchronization signal from another base station apparatus at given reception timing, the wired communication unit transmits a synchronization state confirmation signal for confirming a synchronization state between the base station and another base station apparatus, and receives a synchronization state response signal including a determination result of the synchronization state. The communication timing correction unit corrects a communication timing based on the synchronization state response signal. | 10-24-2013 |
20140169342 | BASE STATION APPARATUS, COMMUNICATION SYSTEM AND SYNCHRONIZATION METHOD - A base station apparatus includes a wireless communication unit, a wired communication unit, and a communication timing correction unit. If the wireless communication unit fails to receive a synchronization signal from another base station apparatus at given reception timing, the wired communication unit transmits a synchronization state confirmation signal for confirming a synchronization state between the base station and another base station apparatus, and receives a synchronization state response signal including a determination result of the synchronization state. The communication timing correction unit corrects a communication timing based on the synchronization state response signal. | 06-19-2014 |
20150200748 | WIRELESS COMMUNICATION DEVICE AND COMMUNICATION TERMINAL - A device divides a sampled sound signal into a high frequency signal and a low frequency signal, individually encodes the high frequency signal and the low frequency signal, and generates error detection code pertinent to the high frequency ADPCM data and the low frequency ADPCM data. The device replaces data pertinent to some of a plurality of bits which configure the low frequency ADPCM data with the error detection code and transmits them. A receiver side receives the high frequency ADPCM data and the low frequency ADPCM data, and individually processes the high frequency ADPCM data and the low frequency ADPCM data in accordance with a value of the error detection code. | 07-16-2015 |
20150304974 | SYNCHRONIZATION ESTABLISHMENT METHOD - Provided is a synchronization establishment method capable of reducing the time required to establish synchronization in a slave station without putting an unnecessary load on a master station. In the synchronization establishment method, a one-second cycle of a message is divided into 100 time slots including slot “0” to slot “99”; ten slots including slot “90” to slot “99” as some of the slots are allocated to a fast synchronization establishment mode; and, in the fast synchronization establishment mode, messages such as Sync2, Delay_Req, and Delay_Resp are transmitted and received between the master station and the slave station so that the slave station establishes synchronization. | 10-22-2015 |
20150304975 | BASE STATION DEVICE AND METHOD OF UPDATING COUNTER OF BASE STATION DEVICE - There is provided a base station device capable of achieving synchronization in a wired manner between base station devices in IP-DECT. Thus, according to the base station device, in slave base station devices, synchronization control unit hardware that is connected to Ethernet (registered trademark), and outputs timestamp information and synchronization pulses which includes interval pulses and wide pulses, synchronization control unit software that generates frame numbers based on the timestamp information, and a wireless timing control unit that receives the synchronization pulses generated in the synchronization control unit hardware and the frame numbers generated in the synchronization control unit software, and performs timing control for performing wireless communication with IP-DECT client terminals are provided. The wireless timing control unit includes a frame counter, and the frame counter is updated using the frame numbers with the wide pulses as triggers. | 10-22-2015 |
20150305028 | COMMUNICATION APPARATUS, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A communication apparatus is provided that can improve synchronization precision between multiple communication apparatuses. For this reason, the communication apparatus that communicates with a different communication apparatus over a network includes a slot control unit that generates multiple slots for communicating a synchronization message, and allocates each slot to the communication apparatus and the different communication apparatus; and a communication unit that communicates the synchronization message between the communication apparatus and the different apparatus, using the each slot that is allocated. | 10-22-2015 |