Abstract: One aspect of the invention provides an ingress apparatus comprising a signal processing apparatus for receiving an incoming data frame and locating the position of path overhead, and a monitoring apparatus arranged to extract information from the located path overhead. The ingress apparatus further includes an insertion apparatus for receiving, from the monitoring apparatus, information extracted from the path overhead of one or more signal path, and being further arranged to insert the extracted information into a respective data frame component which occupies a fixed position in a data frame. Thus, information which would normally occupy a non-fixed position in a data frame is moved to a fixed position. As a result, the information can subsequently be accessed without having to employ relatively complex apparatus for locating information which occupies a non-fixed position.

Abstract: In the face of data loss on connections between a content source and a content consumer, additional connections therebetween are opened. These additional connections are preferably opened between the content source and a proxy disposed between the content source and the content consumer. The proxy may then seam together data streams received from the content source across the additional connections in a recording on a computer-readable medium. The seamed stream may be constructed by filling in information gaps in any of the data streams received from the content source with content derived from others of the data streams received from the content source. This derivation may be made on the basis of identifying characteristics (e.g., packet contents) of packets from each of the data streams received from the content source.

Abstract: A switched fabric mezzanine storage module (560) includes a storage module (562) and a switched fabric connector (563) coupled to the storage module. The storage module is coupled to directly communicate with a switched fabric (506), where the switched fabric storage mezzanine module is coupled to a payload module (502) having one of a 3U form factor, a 6U form factor and a 9U form factor. The payload module can include at least one multi-gigabit connector (518) coupled to a rear edge (519) of the payload module, where the at least one multi-gigabit connector is coupled to communicatively interface with a backplane (504).

Abstract: A multi-service platform system, includes a backplane (104), a switched fabric (106) on the backplane, and at least one of a VMEbus network and a PCI network coincident with the switched fabric on the backplane. A payload module (102) has one of a 3U form factor, a 6U form factor and a 9U form factor, where the payload module is communicatively coupled with the backplane using the switched fabric and at least one of the VMEbus network and the PCI network. At least one multi-gigabit connector (118) is coupled to a rear edge (119) of the payload module, where the at least one multi-gigabit connector is coupled to communicatively interface the payload module to the backplane, and where the switched fabric and at least one of the VMEbus network and the PCI network are communicatively coupled with the payload module through the at least one multi-gigabit connector.

Abstract: An integrated network adapter is operable to establish a network interface with a plurality of media types, including at least a power line network and a telephone line network, based on pre-configuration, upon initialization and dynamically during operation. The adapter further is operable to establish network interfaces simultaneously or separately with a plurality of media types and provide that a communications event can occur simultaneously or separately over a plurality of media types.

Abstract: A system and method for effectively performing a transmit power adjustment procedure in a wireless network includes a forward receiver that monitors a wireless forward link for forward data that is transmitted over the wireless forward link by a forward transmitter. The forward transmitter initially transmits the forward data at a minimum power level, and gradually increases the minimum power level to a power level threshold at which the forward receiver first detects the forward data on the forward link. Once the forward receiver and the forward transmitter are successfully coupled over the wireless forward link, the forward transmitter may then transmit forward data at a normal operating power level. The foregoing transmit power adjustment procedure ensures that the forward receiver receives forward data only from the forward transmitter, and prevents other proximate wireless devices from inadvertently intercepting forward data transmitted by the forward receiver.

Abstract: An outlet for a Local Area Network (LAN), containing an integrated adapter that converts digital data to and from analog video signal. Such an outlet allows using analog video units in a digital data network, eliminating the need for a digital video units or external adapter. The outlet may include a hub that allows connecting both an analog video signal via an adapter, as well as retaining the data network connection, which may be accessed by a network jack. The invention may also be applied to a telephone line-based data networking system. In such an environment, the data networking circuitry as well as the analog video adapters are integrated into a telephone outlet, providing for regular telephone service, analog video connectivity, and data networking as well.

Abstract: Various methods and systems for detecting whether a network device supports a protocol, which defines a supplemental header, are disclosed. One method involves detecting a value within a preamble generated by a sending device and verifying that a header format of a header, also generated by the sending device, conforms to a header format definition of a protocol. The header format definition of the protocol defines a supplemental header. The preamble can be an Ethernet preamble. In one embodiment, the preamble is a converged data link (CDL) preamble or other type of preamble that is used to convey operation, administration and management (OAM) information.

Abstract: In an ATM exchange, a cell transmission control section transmits an ATM cell to a transmission path of an ATM network. A traffic monitor monitors traffic of the cell transmissions. A statistical process section performs a temporal statistical process on the result of the traffic monitoring using a clock and a memory. A CAC produces an instruction for traffic control over a transmission terminal based on the result of the statistical process. A UPC controls traffic of a transmission path from the transmission terminal in accordance with the instruction.

Abstract: A method is disclosed for collecting data about the transmission of network packets that are associated with specified applications. The packets are transmitted through a communications network fabric that is used to couple data processing systems together. A particular existing single bit in a frame header definition is selected. The bit is defined as part of the standard frame header by a communication protocol as an available bit in the frame header. The standard protocol is unchanged by the selection of this bit. An application is specified to be monitored. The selected bit is then set in each network packet that is generated by the specified application. The fabric collects performance data for each packet that has the bit set. Thus, the fabric collects performance data about a transmission of each packet that is generated by the application when that application is setting the bit.

Abstract: Systems and methods for bidirectional communication are provided. In one embodiment, a method for aligning communications from a plurality of remote units in a multipoint-to-point orthogonal frequency division multiplexed (OFDM) communications comprises sending a first signal from a host unit to a first remote unit; receiving a second signal transmitted from the first remote unit in response to the first signal; generating at least one timing adjustment signal based at least in part on a round trip delay between the sending of the first signal and the receiving of the second signal; transmitting the timing adjustment signal to the first remote unit; wherein the timing adjustment signal instructs the first remote unit to delay OFDM transmission of data to improve alignment of multiframes at the host unit when communications are received at the host unit from the plurality of remote units.

Abstract: Disclosed is a device, a computer program and a method to receive and buffer data packets that contain information that is representative of time-ordered content, such as a voice signal, that is intended to be presented to a person in a substantially continuous and substantially uniform temporal sequence; to decode the information to obtain samples and to buffer the samples prior to generating a playout signal. The samples are time scaled as a function of packet network conditions to enable changing the play-out rate to provide a substantially continuous output signal when the data packets are received at a rate that differs from a rate at which the data packets are created. The time scaling operation operates with a base delay that is controlled in a positive sense when the data packets are received at a rate that is slower than a rate at which the data packets are created, and a reserve delay that is managed to provide insurance against an interruption should the base delay become negative.

Abstract: A method for establishing a packet data connection in a telecommunications system which includes an office network, an operator network, and a local area network between them. Data transmission from the office network through the local area network is adapted to a data transmission protocol according to a mobile system. The office network also includes a serving support node, a packet control unit, and a gateway support node, which are arranged to support the packet data protocol of the mobile system. The serving support node, packet control unit, and gateway support node are arranged to have a functional connection with each other and with a radio access gateway. A packet data connection request is made from a mobile station to the office network, and a packet data connection is established from the serving support node and gateway support node to a destination address defined by the link request.

Abstract: Disclosed are new calculations of packet loss bursts, packet re-ordering, and an indication of relative alternate network path delay metrics, based upon differences between received and expected packet sequence numbers, for determining packet network performance.

Abstract: A method, system and transport unit to combine and transport multiple variable data rate LAN streams and fixed data rate voice streams through a plurality of transmission links used as a conduit for transmission of data between local area networks are disclosed. Combining both TDM and packetized network traffic into packets for transfer between LANs using a framed protocol for the transfer is further disclosed.

Abstract: A packet network employs restorable routing with service level guarantees. Restorable routing generates two disjoint paths through a network of nodes interconnected by links for a connection request demand between and ingress-egress node pair. Restorable routing employs minimum interference criteria to generate the two disjoint paths such that two disjoint paths cause little or no interference with demands of future connection requests between different ingress-egress pairs. Restorable routing generates maximum 2-route flows for the network ingress-egress node pairs to determine corresponding sets of 2-critical links. A reduced network is formed, its links are weighted based on criticality indices generated from the sets of 2-critical links, and the relatively optimal two disjoint paths are computed for the connection request. One of the two disjoint paths is selected as an active path for routing data of the connection request, and the other disjoint path is selected as the backup path.

Abstract: Briefly, a method and apparatus to estimate a collision rate parameter by manipulating a first probability value with a second probability value. The first probability value may be the probability of an attempt to transmit a data packet within a desired time slot of a contention window. The second probability value may be a probability of data packet transmitted from the desired time slot within the contention window to collide with an at least one other data packet transmitted by other station of wireless communication network.

Abstract: Methods and systems for forward-looking tone allocation are provided. In one embodiment, a method for an orthogonal frequency division multiplexing (OFDM) multipoint-to-point communications system comprises: establishing communication between a plurality of remote units and a host unit, the remote units communicatively coupled to the host in a multipoint-to-point configuration; transmitting a plurality of tones from the remote units, such that tones from more than one remote unit are simultaneously received at the host, the tones modulated with upstream information using OFDM; adjusting at least one characteristic of at least one tone at least one remote unit, in response to adjustment commands from the host, such that the orthogonality of the simultaneously received tones is improved as received at the host unit; and dynamically switching modulation from at least a first tone of the plurality of tones to a second tone based on an error-rate history of the second tone.

Abstract: A data processing apparatus and method and a computer readable storage medium storing data processing programs realizing the data processing method, capable of preventing transmission of unnecessary redundant data and efficiently utilizing a transmission path. In the data processing method, data is input, the data is compression-encoded, the encoded data is packetized into a first data train on a basis of a first data length, the generated first data train is packetized into a second data train on a basis of a second data length, and the first data length is controlled in accordance with the second data length.

Abstract: Methods and systems for adaptive modulation are provided. In one embodiment, a method for a plurality of remote units of an orthogonal frequency division multiplexing multipoint-to-point communications system comprises: establishing communication between a plurality of remote units and a host unit, the plurality of remote units communicatively coupled to the host unit in a multipoint-to-point configuration; transmitting a plurality of tones from the plurality of the remote units such that tones from more than one remote unit are simultaneously received at the host unit, the plurality of tones modulated with upstream information using orthogonal frequency division multiplexing; modulating up to a plurality of tones using a first modulation scheme when transmitting a first type of upstream information; and modulating up to a plurality of tones using a second modulation scheme when transmitting a second type of upstream information.