Abstract: Systems and methods are described for increasing data transfer efficiency between networks. The invention being particularly well suited when establishing connectivity between wireless networks, such as based on IEEE 802 standards, and traditionally wired network protocols (often referred to as internet protocols), such as TCP/IP and UDP. The invention provides formatting of network packets and then processing of network packets according to one or more optimization processes. One optimization process comprises performing partial packet retransmissions to increase network efficiency, especially in high bit error rate networks such as wireless networks. Another optimization process comprises suppressing unnecessary packet acknowledgements, therein reducing burst traffic and saving substantial overhead in lossy networks. Additional aspects of the invention provide further benefits.

Abstract: A power supplying system is configured so that a power supply server for supplying power and a client for receiving power are connected through a bus line on which an information signal representing information and power exist superimposed on one another, and the information signal is exchanged between the power supply server and the client. To the bus line of the power supplying system, a monitoring apparatus to monitor at least one of the information signal and power information related to power is connected. The monitoring apparatus includes a receiving portion to detect an information signal existing on the bus line, and a display control portion to display at least one of the information signal and the power information exchanged between the power supply server and the client.

Abstract: An arrival angle estimation system includes a transmitting device and a receiving device and estimates an arrival angle at which frames transmitted by radio from the transmitting device arrive at the receiving device. The transmitting device includes two directional antennas each arranged so that its directivity is tilted at ±? degrees with respect to the front of the transmitting device. The receiving device includes a directional antenna having directivity toward the front of the receiving device. Frames are transmitted alternately from the respective directional antennas of the transmitting device, and received signal strengths of the frames on the receiving device side for the respective transmitting directional antennas are compared with each other to estimate the arrival angle.

Abstract: A movement detection system is provided with a wireless terminal, and a movement detection device connectable to the wireless terminal via a wireless network such that the wireless terminal receives signals used for detection at a predetermined frequency from the movement detection device, and transmits verification signals in response to each of the detection signals. The movement detection device includes a measurement portion that measures the signal strength of the verification signals transmitted by the wireless terminal, and a detection portion that detects spatial movement of the wireless terminal based on the signal strength of the verification signals measured by the measurement portion.

Abstract: An information processing apparatus executes processing based on received information conforming to IEEE 802.11n, and includes: an incident angle measuring unit acquiring a received signal and measuring an incident angle of the received signal's radio wave; a reliability estimating unit estimating reliability of a measurement result of the incident angle, by analyzing a state of occurrence of fading using a relationship between frequency and signal intensity of the received signal; and a processing unit executing or controlling processing utilizing the measurement result of the incident angle. The processing unit executes or controls the processing utilizing the measurement result of the incident angle if the estimating unit judges that the reliability of the measurement result of the incident angle is high, and prohibits the processing utilizing the measurement result of the incident angle if the estimating unit judges that the reliability of the measurement result of the incident angle is low.

Abstract: An information processing system includes an information providing apparatus for providing a service, and a mobile terminal for receiving the service from the information providing apparatus. The information providing apparatus includes a plurality of directional antennas arranged in a predetermined space and forming at least one particular area in which communication coverage areas of the directional antennas overlap each other, and a plurality of data transmitting units for transmitting predetermined data to the mobile terminal in the particular area using the directional antennas thereof. The mobile terminal includes a data receiving unit for receiving in the particular area the predetermined data that the data transmitting unit has transmitted via the directional antenna having the particular area as the communication coverage area, and a data processing unit for processing the predetermined data received by the data receiving unit.

Abstract: Systems and Methods are described for determining proximity motion of a mobile wireless device around a fixed target node. The present invention provides a method of regressively analyzing the signal strength on a receiver node, which may be either the mobile wireless device or the fixed target node, as a function of time to determine the proximity of the sending node, which may be either the mobile wireless device or the fixed target node, to the receiving node. The method includes detecting motion of mobile wireless device with a fixed wireless device within a proximity range of less than about 15 cm, and more preferably within around 5 cm. The system provides accurate proximity motion sensing that is not susceptible to multipath effects, and which can be implemented in a wide variety of wireless applications.

Abstract: A method and system for determining location and/or motion for one or more wireless devices communicating at short range (i.e. less than about 30 feet) with other wireless devices on a wireless network. Signal strength measurements are passed within communication frames between wireless devices which can be used to represent an inverse of the distance, wherefrom a distance vector is determined between wireless devices. Using multiple distance vectors from multiple wireless network devices, a 2-D or 3-D coordinate representation for position of each wireless network in 2-D or 3-D space can be calculated. These coordinates can be utilized for determining the precise traveled position of a specific wireless network device in motion and for establishing a motion sensing system. The motion sensing system can be configured as input to a user interface to control devices and systems which integrated within or connected to devices communicating on the wireless network.

Abstract: Systems and methods are described for increasing data transfer efficiency between networks. The invention being particularly well suited when establishing connectivity between wireless networks, such as based on IEEE 802 standards, and traditionally wired network protocols (often referred to as internet protocols), such as TCP/IP and UDP. The invention provides formatting of network packets and then processing of network packets according to one or more optimization processes. One optimization process comprises performing partial packet retransmissions to increase network efficiency, especially in high bit error rate networks such as wireless networks. Another optimization process comprises suppressing unnecessary packet acknowledgements, therein reducing burst traffic and saving substantial overhead in lossy networks. Additional aspects of the invention provide further benefits.

Abstract: Systems and methods are described for controlling congestion, such as within the transport control protocol (TCP) based on bandwidth estimation techniques which provide explicit indications of back-to-back packet traffic. In response to registered back-to-back traffic, receiver-side bandwidth estimation techniques are exploited to enhance the congestion control behavior of TCP based networks. By way of example, a sender marks packets in the header or by changing segment size within a packet to indicate whether the packet is being sent back-to-back. A receiver utilizes the explicit back-to-back information, optionally in conjunction with other back-to-back packet estimation techniques, when estimating available bandwidth and setting congestion parameters. In addition a mechanism for controlling the length of packet trains is described which is based on modulating the transmission of delayed acknowledgements, such as sending acknowledgements upon receipt of a selected number of packets.

Abstract: A method and system for determining location and/or motion for one or more wireless devices communicating at short range (i.e. less than about 30 feet) with other wireless devices on a wireless network. Signal strength measurements are passed within communication frames between wireless devices which can be used to represent an inverse of the distance, wherefrom a distance vector is determined between wireless devices. Using multiple distance vectors from multiple wireless network devices, a 2-D or 3-D coordinate representation for position of each wireless network in 2-D or 3-D space can be calculated. These coordinates can be utilized for determining the precise traveled position of a specific wireless network device in motion and for establishing a motion sensing system. The motion sensing system can be configured as input to a user interface to control devices and systems which integrated within or connected to devices communicating on the wireless network.

Abstract: Systems and Methods are described for determining proximity motion of a mobile wireless device around a fixed target node. The present invention provides a method of regressively analyzing the signal strength on a receiver node, which may be either the mobile wireless device or the fixed target node, as a function of time to determine the proximity of the sending node, which may be either the mobile wireless device or the fixed target node, to the receiving node. The method includes detecting motion of mobile wireless device with a fixed wireless device within a proximity range of less than about 15 cm, and more preferably within around 5 cm. The system provides accurate proximity motion sensing that is not susceptible to multipath effects, and which can be implemented in a wide variety of wireless applications.

Abstract: A method of and apparatus for adaptively managing connectivity for mobile devices through available interfaces allows a user to seamlessly move from one access point to another while the user's mobile device manages the connection for the user. The user's mobile device continuously probes for access points, identifies access points within range of the device and chooses to connect to the access point that fits defined criteria. Information within the access point's beacon signal is used to obtain information regarding the access point and the characteristics of service provided by the access point through out of band communications. Preferably, the mobile device utilizes a separate IPv6 address for each application used by the mobile device so that communications are associated with the appropriate application utilizing this address.

Abstract: A contact 4 for a PGA socket 1 is formed with a plate-like base portion 41, a pair of projecting portions 42a, 42b provided continuously at one end of the base portion 41 to extend in a direction substantially equal to the base portion, a turned portion 43 provided continuously at the other end of the base portion 41 to face the base portion 41, and a tail portion 44 provided continuously at the other end of the base portion 41 not to face the base portion 41. The turned portion 43 is provided with a contact portion 43a contacting a pin of a PGA package on a surface of the turned portion 43 not facing the base portion 41. This prevents flux from adhering on the contact portion 43a of the contact 4 when the contact 4 is soldered on a board.

Abstract: A contact 4 for a PGA socket 1 is formed with a plate-like base portion 41, a pair of projecting portions 42a, 42b provided continuously at one end of the base portion 41 to extend in a direction substantially equal to the base portion, a turned portion 43 provided continuously at the other end of the base portion 41 to face the base portion 41, and a tail portion 44 provided continuously at the other end of the base portion 41 not to face the base portion 41. The turned portion 43 is provided with a contact portion 43a contacting a pin of a PGA package on a surface of the turned portion 43 not facing the base portion 41. This prevents flux from adhering on the contact portion 43a of the contact 4 when the contact 4 is soldered on a board.

Abstract: A contact 4 for a PGA socket 1 is formed with a plate-like base portion 41, a pair of projecting portions 42a, 42b provided continuously at one end of the base portion 41 to extend in a direction substantially equal to the base portion, a turned portion 43 provided continuously at the other end of the base portion 41 to face the base portion 41, and a tail portion 44 provided continuously at the other end of the base portion 41 not to face the base portion 41. The turned portion 43 is provided with a contact portion 43a contacting a pin of a PGA package on a surface of the turned portion 43 not facing the base portion 41. This prevents flux from adhering on the contact portion 43a of the contact 4 when the contact 4 is soldered on a board.

Abstract: Contacts 4 are held by a base housing 2 so that a whole body of each of the contacts 4 may be substantially housed in a contact hole 21 of the base housing and a surface 42a of a tail portion 42 of each of the contacts 4 may be on a plane substantially equal to a surface 2a of the base housing 2. Reduction in thickness of PGA sockets is hereby realized.

Abstract: An eccentric member 5 having a first shaft portion 51 provided with a concavity 51a and an eccentric portion 52 having a medial axis different from a medial axis of the first shaft portion 51 and formed continuously at one end of the first shaft portion 51 is used. The concavity 51a has a concavity with a boundary line dividing the concavity 51a into a rectangular shape on a surface of the first shaft portion 51. A tip portion of a flat blade screwdriver is fitted in the concavity 51a and the flat blade screwdriver is rotated to slide the cover housing 3 over the base housing 2.

Abstract: An eccentric member 5 having a first shaft portion 51 provided with a concavity 51a and an eccentric portion 52 having a medial axis different from a medial axis of the first shaft portion 51 and formed continuously at one end of the first shaft portion 51 is used. The concavity 51a has a concavity with a boundary line dividing the concavity 51a into a rectangular shape on a surface of the first shaft portion 51. A tip portion of a flat blade screwdriver is fitted in the concavity 51a and the flat blade screwdriver is rotated to slide the cover housing 3 over the base housing 2.

Abstract: Contacts 4 are held by a base housing 2 so that a whole body of each of the contacts 4 may be substantially housed in a contact hole 21 of the base housing and a surface 42a of a tail portion 42 of each of the contacts 4 may be on a plane substantially equal to a surface 2a of the base housing 2. Reduction in thickness of PGA sockets is hereby realized.