Abstract: A first electrical device includes: a second radio signal receiver that receives target device information; a second processor that determines whether or not the first electrical device is included in the target device information and the first electrical device is connected to a network or whether or not a second electrical device capable of communicating with the first electrical device is included in the target device information and the second electrical device capable of communicating with the first electrical device is connected to the network; and a transmitter that, when a result of the determination by the second processor indicates that the first electrical device or the second electrical device is included in the target device information, transmits information indicating that the first electrical device or the second electrical device is the search-target device, as a response using a communication method based on the result of the determination.

Abstract: A first electrical device includes: a second radio signal receiver that receives target device information; a second processor that determines whether or not the first electrical device is included in the target device information and the first electrical device is connected to a network or whether or not a second electrical device capable of communicating with the first electrical device is included in the target device information and the second electrical device capable of communicating with the first electrical device is connected to the network; and a transmitter that, when a result of the determination by the second processor indicates that the first electrical device or the second electrical device is included in the target device information, transmits information indicating that the first electrical device or the second electrical device is the search-target device, as a response using a communication method based on the result of the determination.

Abstract: An access point terminal includes: a communication-terminal-status determination unit which determines a communication status of one wireless communication terminal out of wireless communication terminals, by obtaining a wireless signal transmitted or received by the one wireless communication terminal; and a frequency control unit which uses (i) a first frequency band for wireless communication with the one wireless communication terminal and (ii) a frequency band other than the first frequency band for the wireless communication with one or more of the wireless communication terminals other than the one wireless communication terminal, when the communication-terminal-status determination unit determines that the communication status of the one wireless communication terminal satisfies a predetermined condition.

Abstract: A server device for transmitting and receiving data to and from a client device over a wireless communication network including an access point, the server device comprising: wireless connection determining means for determining whether or not the client device is wirelessly communicatively connected over the wireless communication network; security determining means for determining whether or not the client device is securely connected to the access point; and permitting means for permitting an automatic connection of the client device to the server device, when the wireless connection determining means determines that the client device is wirelessly communicatively connected, and when the security determining means determines that the client device is securely connected to the access point.

Abstract: A controller receives first or second equipment identifier from a first wireless communication apparatus, by using one wireless communication circuit of the third and fourth wireless communication circuit. When the one wireless communication circuit is the fourth wireless communication circuit, the controller sets an encryption key information for wireless communications with the first wireless communication apparatus, to encryption key information including an equipment identifier that does not coincide with a received equipment identifier among the received plurality of encryption key information, and controls the third wireless communication circuit to transmit and receive encrypted transmission data to and from the first wireless communication apparatus by using key data included in set encryption key information.

Abstract: A first wireless communication apparatus acquires communication qualities of a first communication path, a second communication path and a direct communication path, respectively, adopts as a communication quality of an indirect communication path a lower communication qualities selected from the communication qualities of the first and second communication paths, and selects a communication path having a higher one of a communication performance corresponding to the direct communication path and a communication performance corresponding to the indirect communication path.

Abstract: A first communication device stores a transmission rate table including response times, and transmission rates associated with the response times, each first response time indicating a time for transmitting test data between the first and second communication devices, while transmitting load data between any pair of communication devices at one of different transmission rates. The first communication device determine a necessary transmission rate for actual data; detect a response time indicating a time for transmitting the test data between the first and second communication devices; determine a transmission rate associated with the response time, as a used transmission rate, based on the transmission rate table; determine an effective remaining transmission rate based on a maximum transmission rate of the communication network and the used transmission rate; and start transmission of the actual data when the effective remaining transmission rate is higher than the necessary transmission rate.

Abstract: A wireless communications apparatus (1) in the present invention transmits, via wireless communications, data recorded on a memory unit (13) to a recording apparatus (2). The wireless communications apparatus (1) includes: a communication area determining unit (19) determining whether or not the wireless communications apparatus (1) is in a communication area having a threshold value equal to MIDDLE or higher; a stillness detecting unit (15) detecting whether or not the wireless communications apparatus (1) remains still; and a wireless communications unit (17) starting to transmit, via the wireless communications, the data recorded on the memory unit (13) to the recording apparatus (2) in the case where (i) the communication area determining unit (19) determines that the wireless communications apparatus (1) is in the communication area having the threshold value equal to MIDDLE or higher, and (ii) the stillness detecting unit (15) detects that the wireless communications apparatus (1) remains still.

Abstract: An antenna unit is provided with: steerable antennas, each having one active antenna element and two parasitic antenna element; and metal blocks. Each of the active antenna elements is associated with at least one of the metal blocks such that the metal block is disposed remote from the active antenna element by a predetermined distance and operates as a reflector for the active antenna element. Each of the parasitic antenna elements is provided with a switching circuit for changing an electrical length of the parasitic antenna element, and the parasitic antenna element operates as a reflector for an active antenna element of the same steerable antenna as the parasitic antenna element by changing the electrical length using the switching circuit.

Abstract: When controlling antenna apparatuses to select a predetermined combination from among a plurality of combinations of antenna elements, a controller measures RSSIs of wireless signals received by the antenna apparatuses, and sets a detection packet interval and a changeover threshold based on measured RSSIs with reference to a detection packet interval table and a changeover threshold table. Then, the combination of the antenna elements is changed over by using the set detection packet interval and the changeover threshold.

Abstract: A communication apparatus (10) includes: a measurement data transmitting unit (120) which transmits a first measurement data to a relay apparatus (20), and a second measurement data to a partner apparatus (30); a response data receiving unit (130) which receives first and second response data; a network measurement unit (140) which calculates a first communication time using the first response data, and a second communication time using the second response data; a connection mode judging unit (150) which judges, based on a partner section communication time that is difference between the second and the first communication times, whether or not the relay apparatus (20) and the partner apparatus (30) are wirelessly connected; and a connection mode switching unit (160) which switches, when judged that the relay apparatus (20) and the partner apparatus (30) are wirelessly connected, the communication with the partner apparatus (30) from indirect to direct wireless communication.

Abstract: A wireless communications apparatus (100) includes: antennas (111, 112, and 113); a threshold identifying unit (141) which measures a first radio propagation environment parameter by using a specific directional pattern, and identifies a threshold, from among thresholds, which corresponds to the measured first radio propagation environment parameter; a directional pattern selecting unit (142) which performs test communications by sequentially switching directional patterns, and selects a directional pattern having an actual throughput, calculated from a measurement value of a second radio propagation environment parameter, greater than the threshold; and a threshold adjusting unit (143) which changes the threshold identified by the threshold identifying unit (141), according to the number of test communications that is the number of the directional patterns used for the test communications performed by the directional pattern selecting unit (142).

Abstract: A directional pattern table memory stores combined directional pattern groups in each of which combined directional patterns are ordered by different predetermined priority according to a different radio propagation environment. A controller computes a communication performance expected value based on RSSIs for when an initial combined directional pattern is set on steerable antenna apparatuses; selects one combined directional pattern group based on relative strengths of RSSIs; and according to the priority, sequentially sets combined directional patterns of the selected one combined directional pattern group, on the steerable antenna apparatuses, computes a communication performance value based on a PHY rate and a PER at each of sequential settings, and performs communication using a combined directional pattern with a communication performance value that first exceeds the communication performance expected value.

Abstract: A server device for transmitting and receiving data to and from a client device over a wireless communication network including an access point, the server device comprising: wireless connection determining means for determining whether or not the client device is wirelessly communicatively connected over the wireless communication network; security determining means for determining whether or not the client device is securely connected to the access point; and permitting means for permitting an automatic connection of the client device to the server device, when the wireless connection determining means determines that the client device is wirelessly communicatively connected, and when the security determining means determines that the client device is securely connected to the access point.

Abstract: A first wireless communication apparatus acquires communication qualities of a first communication path, a second communication path and a direct communication path, respectively, adopts as a communication quality of an indirect communication path a lower communication qualities selected from the communication qualities of the first and second communication paths, and selects a communication path having a higher one of a communication performance corresponding to the direct communication path and a communication performance corresponding to the indirect communication path.

Abstract: A plurality of directional patterns are classified into groups and stored in a directional pattern memory, such that among the plurality of directional patterns, the directional patterns strongly correlated with each other are classified into the same group, while the directional patterns weakly correlated with each other are classified into the different groups. One directional pattern is selected from each group in the directional pattern memory. One directional pattern is determined from the selected directional patterns, in accordance with a communication quality of signals each received when each one of the selected directional patterns is set for steerable antenna element. The determined directional pattern is set for the steerable antenna element.

Abstract: An access point terminal includes: a wireless communication interface which transmits and receives a wireless signal; a device information obtaining unit which obtains supported frequency information through the wireless communication interface, the supported frequency information being for specifying one or more frequency bands in which the wireless communication terminal is capable of performing wireless communication; and a connection information distribution unit which (i) selects a frequency band out of the one or more frequency bands indicated in the supported frequency information obtained by the device information obtaining unit and (ii) distributes connection information to the wireless communication terminal through the wireless communication interface, the connection information being for causing the wireless communication terminal to perform the wireless communication in the selected frequency band.

Abstract: An access point terminal includes: a communication-terminal-status determination unit which determines a communication status of one wireless communication terminal out of wireless communication terminals, by obtaining a wireless signal transmitted or received by the one wireless communication terminal; and a frequency control unit which uses (i) a first frequency band for wireless communication with the one wireless communication terminal and (ii) a frequency band other than the first frequency band for the wireless communication with one or more of the wireless communication terminals other than the one wireless communication terminal, when the communication-terminal-status determination unit determines that the communication status of the one wireless communication terminal satisfies a predetermined condition.

Abstract: When controlling antenna apparatuses to select a predetermined combination from among a plurality of combinations of antenna elements, a controller measures RSSIs of wireless signals received by the antenna apparatuses, and sets a detection packet interval and a changeover threshold based on measured RSSIs with reference to a detection packet interval table and a changeover threshold table. Then, the combination of the antenna elements is changed over by using the set detection packet interval and the changeover threshold.

Abstract: An antenna unit is provided with: steerable antennas, each having one active antenna element and two parasitic antenna element; and metal blocks. Each of the active antenna elements is associated with at least one of the metal blocks such that the metal block is disposed remote from the active antenna element by a predetermined distance and operates as a reflector for the active antenna element. Each of the parasitic antenna elements is provided with a switching circuit for changing an electrical length of the parasitic antenna element, and the parasitic antenna element operates as a reflector for an active antenna element of the same steerable antenna as the parasitic antenna element by changing the electrical length using the switching circuit.