摘要:
A wireless communication apparatus is provided in which a frequency band, a signal type, and a transmission power conforming to radio law of a country that uses a first wireless communication system are set by means of a receiving status of a specific signal of a second wireless communication system, so that user friendly wireless communication apparatus regarding operations thereof can be provided. In the wireless communication system 1 according to the present invention, an area information acquisition portion 2 acquires information on an area in which the wireless communication system presently exists. Based on communication setting information in the wireless communication system corresponding to area information stored in an information memory portion 4, an area information judgment portion 3 judges communication setting information capable of being set in the wireless communication system in accordance with the area information acquired from the area information acquisition portion 2. Based on the communication setting information judged by the area information judgment portion 3, communication parameter control setting portion 5 controls communication settings of the wireless communication system.
摘要:
A collision of data transmitted in an ad hoc network in which a communication system such as a wireless LAN system is managed without a master control station is minimized. A communication station in the network estimates a time at which a neighboring station will transmit a signal and, when a communication start request is received from some other communication station, adds time information, generated based on the length of time to the estimated time, to a response to the communication start request. This allows the reception side communication station, which knows in advance that the transmission will be occupied by a transmission from other communication stations, to cause the transmission side communication station to transmit data at a time other than that occupation time.
摘要:
A wireless communication system performs high-speed and low-speed transmission of information signals for short-distance communication and long-distance communication by using a short spread code and a long spread code, respectively. A wireless transmission unit includes an interface, a buffer, a spreading processor, a UWB wireless transmitter, a controller, a data memory, and an antenna. The controller detects the entry of information signal into the buffer, and then determines the transmission rate depending on the state of wireless linkage and indicates the determined transmission rate to the spreading processor.
摘要:
A wireless communication system performs high-speed and low-speed transmission of information signals for short-distance communication and long-distance communication by using a short spread code and a long spread code, respectively. A wireless transmission unit includes an interface, a buffer, a spreading processor, an ultra wide band (UWB) wireless transmitter, a controller, a data memory, and an antenna. The controller detects the entry of information signal into the buffer, and then determines the transmission rate depending on the state of wireless linkage and indicates the determined transmission rate to the spreading processor.
摘要:
A wireless communication system performs high-speed and low-speed transmission of information signals for short-distance communication and long-distance communication by using a short spread code and a long spread code, respectively. A wireless transmission unit includes an interface, a buffer, a spreading processor, a UWB wireless transmitter, a controller, a data memory, and an antenna. The controller detects the entry of information signal into the buffer, and then determines the transmission rate depending on the state of wireless linkage and indicates the determined transmission rate to the spreading processor.
摘要:
In wireless communication with another communication apparatus in a predetermined wireless network, overhead information defined in a media access control layer is divided into a header of information necessary for the common access control and a header of information necessary for each payload. Address information is added to the header of information necessary for the common access control to transmit the generated header attached to the transmission data. For example, in a case of forming a physical burst in which a plurality of data payloads are combined into one, a frame structure is provided without useless repetition of address information.
摘要:
A wireless communication device includes: a reception portion that receives a transmission request signal addressed to the wireless communication device that is transmitted from a counterpart communication device; a determination portion that, when the reception portion receives the transmission request signal, determines whether data transmission from the counterpart communication device is possible, based on an availability of a wireless transmission path; a suspension control portion that, when it is determined that the data transmission from the counterpart communication device is not possible, performs transmission control of a suspension request signal that requests suspension of the data transmission; and a response control portion that, when the determination portion determines that the data transmission from the counterpart communication device is possible after the transmission control of the suspension request signal, performs transmission control of a response signal in response to the transmission request signal addressed to the wireless communication device.
摘要:
An own-group storage area in which beacon information concerning a group of the own device is stored and an other-groups storage area in which beacon information concerning other groups different from the group of the own device is stored are allocated to a memory area of a wireless communication device in a network. The wireless communication device includes storage means for storing the beacon information concerning the other groups in the own-group storage area and the other-groups storage area in the same structure as that of the beacon information concerning the group of the own device.
摘要:
A wireless communication device includes: a generation portion that generates management information for forming a wireless network with wireless communication devices in the vicinity, and operation instruction information that instructs operation of at least one of the wireless communication devices in the vicinity; and a communication portion that periodically transmits, to the wireless communication devices in the vicinity, management information to which the operation instruction information has been added.
摘要:
A communication terminal under the control of a wireless base station recursively has wireless base station capabilities in a parent network, constructs a daughter network within a scope of resources of the own apparatus assigned by the wireless base station, and assigns the resources to an other communication terminal under the control of the communication terminal having base station capabilities. This novel constitution allows to configure two or more networks guaranteed not to interfere each other, thereby allowing the coexistence of a plurality of personal area networks on a same frequency channel. At the same time, the novel constitution allows expanding a network area without increasing the scale of equipment.