摘要:
A wireless communication apparatus includes wireless communicating unit that carries out a wireless communication with a telephone base unit to be connected to a communication line and carries out the wireless communication with a telephone remote unit that performs the wireless communication with the telephone base unit, communicating unit connected to a communication remote unit, and control unit that communicates with the telephone base unit and the telephone remote unit by using a communication frame including a first slot pair having a descending slot to be used for receiving a signal from the telephone base unit which is disposed earlier on a time basis and an ascending slot to be used for transmitting a signal to the telephone base unit which is disposed later on the time basis, and a second slot pair having a descending slot to be used for transmitting data to the telephone remote unit which is disposed earlier on the time basis and an ascending slot to be used for receiving data from the telephone remote unit which is disposed later on the time basis.
摘要:
A radio communication system of a frequency hopping system, which carries out time division multiplex by TDMA and carries out communications while changing over two or more frequencies with respect to a radio link, wherein radio resources are efficiently utilized by establishing a plurality of radio links. A first communication apparatus periodically transmits control data by a frame cycle and a second communication apparatus which is a communication partner thereof receives the above-described control information during standby and secures synchronization in timing of frames and slots and timing of frequency hopping. Communication signals between both communication apparatuses and control information are overlapped in a slot to establish radio links. Once radio links are established in a plurality of slots other than a slot for transmitting control information, control is performed such that the control information is overlapped in the slots in which a radio link is established.
摘要:
In a time division multiplex access (TDMA-TDD) type wireless communication system in which a communication operation is carried out between a first communication apparatus (mother appliance) and a second communication apparatus (child appliance), and since a slot diversity mode is selected while considering power consumption on the side of the second communication apparatus, the wireless communication system performs such a wireless communication having a higher wireless quality. Based upon a power supply remaining energy capacity on the side of the second communication apparatus, and an electromagnetic wave environment when a wireless signal is received, a slot diversity mode is selected. For example, it is so assumed that 1 frame corresponds to 8 slots, a wireless signal is transmitted from the first communication apparatus to the second communication apparatus by employing two, or more slots, whereas a wireless signal is transmitted from the second communication apparatus to the first communication by employing one slot within the remaining 2 to 6 (8-2) pieces of the slots. As a result, since a total number of the wireless transmission slots used in the second communication apparatus is reduced, transmission electric power can be lowered which may occupy a large ratio within the entire power consumption.
摘要:
The present invention relates to a radio communication system of a frequency hopping system, which carries out time division multiplex by TDMA and carrying out communications while changing over two or more frequencies with respect to a radio link, wherein it is therefore an object to effectively utilize radio resources by establishing a plurality of radio links. The first communication apparatus periodically transmits control data by a frame cycle and the second communication apparatus of a communication partner thereof receives the above-described control information during standby and secures synchronization in timing of frames and slots and timing of frequency hopping, wherein communication signals between both communication apparatuses and control information are overlapped in a slot to establish radio links. Also, once radio links are established in a plurality of slots other than a slot for transmitting control information, it is controlled that the control information is overlapped in the slots in which a radio link is established.
摘要:
In a time division multiplex access (TDMA-TDD) type wireless communication system in which a communication operation is carried out between a first communication apparatus (mother appliance) and a second communication apparatus (child appliance), and since a slot diversity mode is selected while considering power consumption on the side of the second communication apparatus, the wireless communication system performs such a wireless communication having a higher wireless quality. Based upon a power supply remaining energy capacity on the side of the second communication apparatus, and an electromagnetic wave environment when a wireless signal is received, a slot diversity mode is selected. For example, it is so assumed that 1 frame corresponds to 8 slots, a wireless signal is transmitted from the first communication apparatus to the second communication apparatus by employing two, or more slots, whereas a wireless signal is transmitted from the second communication apparatus to the first communication by employing one slot within the remaining 2 to 6 (8-2) pieces of the slots. As a result, since a total number of the wireless transmission slots used in the second communication apparatus is reduced, transmission electric power can be lowered which may occupy a large ratio within the entire power consumption.
摘要:
A radio communication system of a frequency hopping system, which carries out time division multiplex by TDMA and carries out communications while changing over two or more frequencies with respect to a radio link, wherein radio resources are efficiently utilized by establishing a plurality of radio links. A first communication apparatus periodically transmits control data by a frame cycle and a second communication apparatus which is a communication partner thereof receives the above-described control information during standby and secures synchronization in timing of frames and slots and timing of frequency hopping. Communication signals between both communication apparatuses and control information are overlapped in a slot to establish radio links. Once radio links are established in a plurality of slots other than a slot for transmitting control information, control is performed such that the control information is overlapped in the slots in which a radio link is established.
摘要:
To provide a communication apparatus or the like capable of reducing current consumption during a period of a master apparatus detection process. The communication apparatus is a communication apparatus operating as a slave apparatus. The communication apparatus includes a radio unit 210 that communicates a signal with another communication apparatus, a master apparatus detection unit 220 that performs a master apparatus detection process of detecting a master apparatus 10 using at least a UW pattern included in the signal received by the radio unit 210, and a control unit 230 that controls the number of bits of a preamble pattern used for the master apparatus detection process together with the UW pattern in the preamble pattern existing before the UW pattern based on the result of the master apparatus detection process performed by the master apparatus detection unit 220.
摘要:
The invention provides a radio communication device for carrying out a time division communication, thereby communicating with a base station for transmitting control data, wherein when an intermittent receiving operation is to be performed in order to capture the control data transmitted from the base station during a standby, the receiving operation of the radio portion is started to periodically receive the control data of the base station, the receiving operation is stopped if the control data cannot be received for a predetermined receipt period, the receiving operation is then restarted repetitively after a predetermined halt period passes, and a receiving period in the intermittent receiving operation is switched to be short if the control data cannot be captured for a predetermined period. Consequently, the consumed current of a retrieving operation can be reduced in an environment in which a signal sent from the base station cannot be received, and the control data can be received early when a receivable state is brought, and thus, a return to a standby state can be carried out immediately and quickly.
摘要:
To implement highly-reliable information transmission to a plurality of counterparties by using one radio resource.A transmission information construction unit 104 of a base station 500 divides image information, designate order number thereto, and performs transmission multiple times at slots notified with notification information. A control unit 620 of a sub station 600 receives the notification information, establishes synchronization of TDMA and frequency hopping with the base station 500, performs reception of image information at a slot notified with the notification information, discards redundantly-received image information based on the order numbers, and performs displaying the image information.
摘要:
A portable telephone apparatus capable of avoiding a troublesome operation for responding to an incoming call is provided. The portable telephone apparatus having a flip-lid includes a radio circuit section for transmitting or receiving a signal to/from a radio base station, a radio control circuit section for controlling the radio circuit section, and a flip-lid state detecting circuit for detecting an opening/closing state of the flip-lid. The radio control circuit section changes a responding method to an incoming call when opening the flip-lid is determined by the flip-lid state detecting circuit.