Abstract: Provided is an improved estimation and identification device that estimates the position of a plurality of identification targets and identifies the plurality of identification targets.

Abstract: A terminal device includes: transmission circuitry that transmits a connection request to a first access point in order to connect, by a wireless link, to one of the first access point or a second access point each having a superframe in an initial state in which a control channel period is longer than a data channel period; and reception circuitry that receives, as a connection response, information indicating the second access point as information on a connection destination access point from the first access point after the connection request is transmitted.

Abstract: This wireless communication system comprises: a first wireless node; a second wireless node that transmits a signal to the first wireless node in response to a request from the first wireless node; and a third wireless node that transmits a connection request to the second wireless node in response to reception of the signal. The second wireless node transmits to the third wireless node connection permission for the connection request, and the first wireless node detects the third wireless node by receiving the connection permission.

Abstract: This position estimation system comprises a first wireless node for forming a wireless area; second wireless nodes which move within the wireless area; a plurality of third wireless nodes which are provided within the wireless area; and a position estimation device which estimates the position of the second wireless nodes on the basis of information indicating wireless reception quality at the third wireless nodes and the second wireless nodes. The position estimation device determines, for each of section areas, and on the basis of information pertaining to time resource capacity for wireless communication directed towards second wireless nodes, section areas which collect, in place of the first wireless node, information containing wireless reception quality at the second wireless nodes, and transmits, to one of third wireless nodes provided in the determined section area, and instruction to collect wireless reception quality at second wireless nodes within said section area.

Abstract: Provided is an improved estimation and identification device that estimates the position of a plurality of identification targets and identifies the plurality of identification targets.

Abstract: A position estimation device includes: a selector configured to select N wireless terminals and reselect N wireless terminals from M wireless terminals; a distance calculator configured to calculate distances among wireless terminals in a group consisting of a parent wireless terminal and the N wireless terminals based on information on power of radio signals of packets transmitted and received; a relative position calculator configured to calculate relative positions of the M wireless terminals based on the distances among the wireless terminals in the group for the N wireless terminals selected and reselected; and an absolute position converter configured to convert a relative position of a child wireless terminal into an absolute positon of the child wireless terminal based on the relative positions of the M wireless terminals and absolute positions of at least three of the M wireless terminals where the absolute positions are known.

Abstract: A terminal device includes: transmission circuitry that transmits a connection request to a first access point in order to connect, by a wireless link, to one of the first access point or a second access point each having a superframe in an initial state in which a control channel period is longer than a data channel period; and reception circuitry that receives, as a connection response, information indicating the second access point as information on a connection destination access point from the first access point after the connection request is transmitted.

Abstract: A position estimation device includes: a selector configured to select N wireless terminals and reselect N wireless terminals from M wireless terminals; a distance calculator configured to calculate distances among wireless terminals in a group consisting of a parent wireless terminal and the N wireless terminals based on information on power of radio signals of packets transmitted and received; a relative position calculator configured to calculate relative positions of the M wireless terminals based on the distances among the wireless terminals in the group for the N wireless terminals selected and reselected; and an absolute position converter configured to convert a relative position of a child wireless terminal into an absolute positon of the child wireless terminal based on the relative positions of the M wireless terminals and absolute positions of at least three of the M wireless terminals where the absolute positions are known.

Abstract: A control device includes a communication unit, a storage, and a position estimator. The position estimator updates a position of the first wireless communication device by using a difference between first reception quality and third reception quality and a difference between second reception quality and fourth reception quality. A first response signal includes at least the first reception quality calculated when a first control signal is received by the first wireless communication device and the second reception quality of a second response signal calculated when the second response signal is received by the first wireless communication device, and a third response signal includes at least the third reception quality of a third control signal and the fourth reception quality of a fourth response signal calculated when the fourth response signal is received by the first wireless communication device.

Abstract: A control device includes a communication unit, a storage, and a position estimator. The position estimator updates a position of the first wireless communication device by using a difference between first reception quality and third reception quality and a difference between second reception quality and fourth reception quality. A first response signal includes at least the first reception quality calculated when a first control signal is received by the first wireless communication device and the second reception quality of a second response signal calculated when the second response signal is received by the first wireless communication device, and a third response signal includes at least the third reception quality of a third control signal and the fourth reception quality of a fourth response signal calculated when the fourth response signal is received by the first wireless communication device.

Abstract: A presentation apparatus includes a controller that includes a first output terminal for outputting a control signal and first to nth light emitters that each include a first input terminal to which the control signal is input and that is each attachable to the controller in a stacking manner and detachable from the controller. The control signal is transferred to the first to nth light emitters in a stacking order via an electrical serial connection.