Abstract:
A communication system (10) has a base station having an adaptive antenna with a plurality of main array antenna elements for generating a plurality of communication beams. The system further includes a gateway station coupled to the base station. The gateway station forms a plurality of beams commands by communicating plurality of a control signals to the base station to form the communication beams.
Abstract:
A method and an apparatus are provided for performing parameter negotiation in a data compression link. When data is sent along the communication link in a compressed form, the escape character is not modified. When sending data in an uncompressed form, the escape character is followed by a command and the escape character is modified. A parameter mode can be entered when data is being sent uncompressed. During parameter mode, parameter negotiation between the modem peers can be accomplished without interrupting the communication link.
Abstract:
A system (10) of distributing electronic content includes a network operations center (214) forming a composite broadcast signal having digital electronic content during a vertical blanking interval of a primary channel signal. A content delivery system (210) receives the composite broadcast signal from the network operations center and broadcasts the composite broadcast signal. A base station receives the composite broadcast signal forms a wireless local area network (228). The base station (220) rebroadcasts at least a portion of the composite signal as a rebroadcast signal using the wireless local network. A user appliance (232) is positioned within the local area network and receives the rebroadcast signal.
Abstract:
A method and apparatus for enhancing the performance of a network by performing selective spoofing. Selective spoofing provides the ability to discriminate among different connections and only allocate spoofing resources to those connections for which spoofing will actually improve performance. The selective spoofing functison described are applicable to a wide variety of communication links, including both slow and fast links, high latency links, and links with low and high error rates. The selective spoofing functions may be implemented either alone or in combination with other performance enhancing features, such as, spoofing the conventional TCP three-way handshake, local data acknowledgement, multiplexing multiple connections across a single connection, data compression/encryption, prioritization, and path selection. The selective spoofing features described are particularly useful for links with high latency and/or high bit error rates.
Abstract:
A personal video on-demand system and method which permits a user to receive available content using a single tuner and perform one of a plurality of operations on the available content. These operations include recording two or more signals, where one or both may be simultaneously viewed, recording one or more signals and playing back one or more signals, playing back two or more signals, watching one or more signals while recording one or more other signals, viewing two or more signals live, or viewing at least one signal live, while reviewing one or more signals in a playback mode. These operations also include selecting an even based on actor, actress, director, etc., alerting a user to an attempt to record a duplicate program, displaying a status of a program from the available content the user is watching, playing paused programming or converting paused programming to recorded programming during a channel change, allowing a user to record an entire program after viewing the program for a period of time, permitting a user to capture a snippet of the available content, permitting a user to rewind recording in an increment for playback of a portion of the available content, enabling a user to jump back from a live broadcast to a last paused video segment.
Abstract:
A method of configuring a broadband communications device over a network includes the step of transmitting an initiation signal from the broadband communications device to a protocol server, acquiring from the protocol server addressing information based on the initiation signal, and launching a request signal from the broadband communications device to a configuration system specified by the addressing information. Configuration information for the broadband communications device is received from the configuration system. The broadband communications device is subsequently configured with the configuration information.
Abstract:
A method and an apparatus are provided for performing parameter negotiation in a data compression link. When data is sent along the communication link in a compressed form, the escape character is not modified. When sending data in an uncompressed form, the escape character is followed by a command and the escape character is modified. A parameter mode can be entered when data is being sent uncompressed. During parameter mode, parameter negotiation between the modem peers can be accomplished without interrupting the communication link.
Abstract:
A waveform to be transmitted as a burst within a channel that is used for the synchronization of unsynchronized wireless communications terminals in a wireless communications system, and a method of synchronization involving the waveform, that consists of a composite waveform. The composite waveform comprises two or more component waveforms, wherein each of the two or more component waveforms has a known frequency variation throughout the burst. The composite waveform has a composite bandwidth on an order of an available channel bandwidth and each of said two or more component waveforms have a component bandwidth on the order of the available channel bandwidth. Furthermore, a range of values for the differences between the instantaneous frequencies of two of said two or more component waveforms is on an order of twice of said available channel bandwidth.
Abstract:
An approach is provided for decoding a low density parity check (LDPC) coded signal. Edge values associated with a structured parity check matrix used to generate the LDPC coded signal are retrieved from memory (1501, 1503). The edge values specify the relationship of bit nodes and check nodes, and are stored within memory according to a predetermined scheme that permits concurrent retrieval of a set of the edge values. A decoded signal corresponding to the LDPC coded signal is output based on the retrieved edge values.
Abstract:
A two-way satellite communication system for providing a scalable architecture is disclosed. A plurality of transceivers (109) transmit signals over a plurality of return channels, wherein the plurality of return channels are partitioned into a plurality of return channel groups. A hub (113) communicates with the plurality of transceivers (109) via the plurality of return channel groups. The hub (113) is connected to a packet switched network (105). Each of the plurality of transceivers (109) performs a random weighted selection of a return channel group among the plurality of return channel groups.