Abstract: A method and apparatus to generate a common-mode reference signal. A common-mode current is received at a common-mode current sensing circuit. The common-mode current is sampled at a node between the common-mode current sensing circuit and a shunt resistor. The resulting voltage across the shunt resistor from the applied common-mode current is used as a common-mode reference signal.

Abstract: A method, apparatus, and system in which one embodiment includes a network interface device (NID) located outside a building and a power supply unit located inside the building. The power supply unit has an electrical isolation component and one or more ports that couple via a first phone line and a second phone line to the NID to provide isolated DC power to the NID.

Abstract: A method and apparatus to generate a common-mode reference signal. A common-mode current is received at a common-mode current sensing circuit. The common-mode current is sampled at a node between the common-mode current sensing circuit and a shunt resistor. The resulting voltage across the shunt resistor from the applied common-mode current is used as a common-mode reference signal.

Abstract: Embodiments of a method and apparatus are described to transmit a data signal from a power supply unit, over existing direct current (DC) power transmission lines, to a residential gateway which includes an infrared (IR) receiver designed to receive optical signals. In one embodiment, the IR receiver is configured to receive a carrier current communication signal from the power supply unit over a pair of copper wires coupled to the IR receiver. The carrier current communication signals may be encoded by a transmission encoding logic circuit using pulse position modulation techniques. The received carrier current communication signals may be demodulated and decoded to reproduce an input data stream.

Abstract: A method and apparatus to transfer a data session from one device connected to a residential gateway to another. The transfer is completed within the residential gateway, without routing data through the service provider's network. In one embodiment, a native address of a communication device engaged in an active data session is stored in a memory as a temporary device address. A session address in memory is set equal to the stored temporary device address and the temporary device address is associated with the session address in memory. When a request to transfer the data session to another device is received, the temporary device address in memory set to the native address of the new communication device and the session history is sent to the new device. Any new data received in the session, intended for the original device, is routed by a data session handling engine to the new communication device.

Abstract: Various methods, apparatuses, and systems in which a back up power supply is provided to a network interface device are described. In one embodiment, an apparatus includes a network interface device (NID) located outside a building and a power supply unit located inside the building. The power supply unit has one or more ports that couple via a phone line to the NID to provide a power signal to the NID. The apparatus further includes a direct current (DC) back up power unit located in the NID. The DC back up power unit provides back up power to the NID. The NID is configured to periodically switch between receiving the power signal from the power supply unit and the DC back up power unit even when no fault condition exists in the power supply unit.

Abstract: Various methods, apparatuses, and systems are described in which a WAP is coupled to an antenna unit and provides a wireless LAN. In one embodiment, the antenna unit includes at least one remote antenna circuit having one or more ports to receive a control signal and a transmit signal transmitted from the WAP located in a multi-tone transmitter-receiver. Each remote antenna circuit includes a transmit amplifier unit that amplifies the transmit signal, a receive amplifier unit that amplifies a receive signal, and control unit that receives the control signal. The control unit controls an operation of the transmit and the receive amplifier units to extend a range of the wireless WAP with the at least one remote antenna circuit.

Abstract: A method and apparatus to provide a bi-directional constant impedance filter. Embodiments include electric networks which give filter responses while presenting a constant impedance to a signal received at either an input or an output port for a plurality of frequencies.

Abstract: A system and method for enabling an access point to determine that a mobile device has crossed a wireless coverage area boundary associated with the access point and select, for transmission to the mobile device, an audible notification indicating the mobile device has crossed the wireless coverage boundary associated with the access point, wherein the audible notification is stored at the access point in compressed form, prior to determining the mobile device has crossed the wireless coverage area boundary.

Abstract: Embodiments of a method and apparatus are described to transmit a data signal from a power supply unit, over existing direct current (DC) power transmission lines, to a residential gateway which includes an infrared (IR) receiver designed to receive optical signals. In one embodiment, the IR receiver is configured to receive a carrier current communication signal from the power supply unit over a pair of copper wires coupled to the IR receiver. The carrier current communication signals may be encoded by a transmission encoding logic circuit using pulse position modulation techniques. The received carrier current communication signals may be demodulated and decoded to reproduce an input data stream.

Abstract: Clock synchronization for a wireless communication system is described. The communication system utilizes a server with a radio coupled to receive a radio frequency (RF) signal and a clock interface to receive a reference clock signal. The server includes a network interface configured to receive, from a base station, a time that the RF signal was received at the base station. The server further includes a processing device configured to determine when the RF signal was transmitted and a location of the base station, and configured to calculate clock offset value representative of a time to delay a local clock signal at the base station to synchronize the local clock signal at the base station with the reference clock signal.

Abstract: An antenna unit includes one or more antenna circuits coupled to one or more antenna structures. Each antenna structure includes a first feed point and a second feed point to receive signals from a transceiver unit or transmit signals to the transceiver unit. The first feed point of each antenna structure is configured to maximize coupling into an associated antenna structure at a first frequency band and the second feed point of each antenna structure is configured to maximize coupling into an associated antenna structure at a second frequency band. Each antenna structure has a slot that separates each antenna structure into a first patch associated with the first feed point and the first frequency band and a second patch associated with the second feed point and the second frequency band. Each antenna circuit is operatively coupled to the transceiver unit without an intervening multiplexing functionality or circuitry.

Abstract: A method and apparatus to transfer a data session from one device connected to a residential gateway to another. The transfer is completed within the residential gateway, without routing data through the service provider's network. In one embodiment, a native address of a communication device engaged in an active data session is stored in a memory as a temporary device address. A session address in memory is set equal to the stored temporary device address and the temporary device address is associated with the session address in memory. When a request to transfer the data session to another device is received, the temporary device address in memory set to the native address of the new communication device and the session history is sent to the new device. Any new data received in the session, intended for the original device, is routed by a data session handling engine to the new communication device.

Abstract: Clock synchronization for a wireless communication system is described. The communication system utilizes a server with a radio coupled to receive a radio frequency (RF) signal and a clock interface to receive a reference clock signal. The server includes a network interface configured to receive, from a base station, a time that the RF signal was received at the base station. The server further includes a processing device configured to determine when the RF signal was transmitted and a location of the base station, and configured to calculate clock offset value representative of a time to delay a local clock signal at the base station to synchronize the local clock signal at the base station with the reference clock signal.

Abstract: Various methods, apparatuses, and systems are described in which a WAP is coupled to an antenna unit and provides a wireless LAN. In one embodiment, the antenna unit includes at least one remote antenna circuit having one or more ports to receive a control signal and a transmit signal transmitted from the WAP located in a multi-tone transmitter-receiver. Each remote antenna circuit includes a transmit amplifier unit that amplifies the transmit signal, a receive amplifier unit that amplifies a receive signal, and control unit that receives the control signal. The control unit controls an operation of the transmit and the receive amplifier units to extend a range of the wireless WAP with the at least one remote antenna circuit.

Abstract: A method of clock synchronization for a wireless communications system includes receiving a radio frequency (RF) signal at a base station and at a network reference server (NRS). The NRS is also coupled to receive a reference clock signal. A clock offset value is then calculated in response to the RF signal received at the base station, the RF signal received at the NRS, and the reference clock signal. A local clock signal at the base station is then synchronized with the reference clock signal in response to the calculated clock offset value.

Abstract: In an embodiment, a DSL communication device comprising a line interface circuit is disclosed. The line interface circuit includes a hybrid circuit to interface the communication device to a communication line, a lowpass transmit filter to pass signals in a first frequency band, and a highpass transmit filter to pass signals in a second frequency band, where the second frequency band is higher in frequency than the first frequency band. The outputs of the highpass and lowpass filters are coupled in parallel to the communication line. The lowpass and highpass filters as well as the low and highpass transformers are optimized for their frequency bands. Further, the edges of the low and high frequency bands are sufficiently separated to reduce interference from the other frequency band. These factors, in part, allow a multiple tone communication device to be capable of operating in multiple modes of operation with multiple DSL varieties.

Abstract: A method and apparatus to provide a bi-directional constant impedance filter. Embodiments include electric networks which give filter responses while presenting a constant impedance to a signal received at either an input or an output port for a plurality of frequencies.