Abstract:
To better utilize the variable bandwidth of wireless links, a network node in accordance with the present invention escapes rigid bandwidth hierarchy of conventional TDM protocols, which is not suited for fully using the available bandwidth of a wireless link. Specifically, many embodiments of the present invention use TDM frames that have payloads, which do not strictly conform to the bandwidth hierarchy of conventional TDM protocols. For example, many embodiments of the present invention form TDM frames having a payload that is a non-integer multiple of a base bandwidth, such as OC-1/STS-1.
Abstract:
A method comprising the steps of (A) generating a code, (B) applying one or more constraint constructs to the code, (C) generating a coverage code and a second code in response to applying the constraint constructs to the code, (D) generating a third code in response to the code, and (E) generating one or more assembly language tests in response to the second code.
Abstract:
The versatility provided by network nodes in accordance with the present invention allows the formation of networks using different types of links, links with differing bandwidth, data rates, and bit error rates, as well as both asymmetric and symmetric links. For example, a network can include a first network node coupled to a second network node with a wireless link. The network can include a third network node coupled to the second network node an optical link and coupled to the first network node by a wireless link. A fourth network node can be easily inserted between the third network node and the third network node using wireless links. The optical link between the second and third network nodes can operate at one bandwidth and the various wireless links would operate at other bandwidths depending on the environmental conditions between each pair of nodes.
Abstract:
An application specific integrated circuit is provided on a chip where a combinatorial logic circuitry such as a RAM memory array, logic circuitry and control circuitry may be operated in the normal mode with the addition of a built-in, self-test feature whereby the registers can be converted to multifunction shift registers which are connected in a serial fashion to form a shift chain snake through which data patterns can be shifted. Additionally, control circuitry is provided to select certain multifunction shift registers as test pattern generators and other multifunction shift registers are receivers of signatures which can be accessed by a maintenance controller to check proper operability of the system and its combinatorial logic.
Abstract:
To more fully utilize the available bandwidth of a network link, network nodes in accordance with the present invention allow TDM data to be combined with packet data. A Packet/TDM cross connect switch, having both a TDM switch and a packet switch, is used in these embodiments. Data packets are transformed into TDM packet columns. The TDM packet columns are combined with standard TDM data columns in the payload of a TDM data frame. Data packets may be sorted based on a priority scheme, in which high priority data packets are given precedence over lower priority data. However, both high priority and low priority may be combined in a TDM packet column.
Abstract:
To provide the quality and reliability of a fiber optic link over a wireless link, network nodes in accordance with the present invention include a link quality management unit, which controls multiple transmission parameters of a wireless interface in response variable link conditions. For example, the link quality management unit of one embodiment of the present invention controls transmission power, modulation, and error correction. In general, a receiving network node provides feedback to a transmitting network node. Thus, in many embodiments of the present invention, the link quality management unit includes a signal quality detector, which measures a signal quality value, such as bit error rate, signal to noise ratio, or error vector magnitude. The measured signal quality is transmitted back to the transmitting node so that appropriate changes can be made to the transmission parameters.
Abstract:
A VSLI chip is implemented with registers which log permanent and intermittent errors occurring within the chip as sensed by concurrent error detection circuitry (CED). If a fatal error is detected (one which would destroy the reliability of chip operations), then the chip is immobilized into a hold mode (freeze). Interrupts are signalled to a cooperating maintenance controller which can pass the error information to an external computer for display and for locating a faulty area.
Abstract:
To more fully utilize the available bandwidth of a network link, network nodes in accordance with the present invention allow TDM data to be combined with packet data. A Packet/TDM cross connect switch, having both a TDM switch and a packet switch, is used in these embodiments. Data packets are transformed into TDM packet columns. The TDM packet columns are combined with standard TDM data columns in the payload of a TDM data frame. Data packets may be sorted based on a priority scheme, in which high priority data packets are given precedence over lower priority data. However, both high priority and low priority may be combined in a TDM packet column.
Abstract:
A method comprising the steps of (A) generating a code, (B) applying one or more constraint constructs to the code, (C) generating a coverage code and a second code in response to applying the constraint constructs to the code, (D) generating a third code in response to the code, and (E) generating one or more assembly language tests in response to the second code.
Abstract:
To more fully utilize the available bandwidth of a network link, network nodes in accordance with the present invention allow TDM data to be combined with packet data. A Packet/TDM cross connect switch, having both a TDM switch and a packet switch, is used in these embodiments. Data packets are transformed into TDM packet columns. The TDM packet columns are combined with standard TDM data columns in the payload of a TDM data frame. Data packets may be sorted based on a priority scheme, in which high priority data packets are given precedence over lower priority data. However, both high priority and low priority may be combined in a TDM packet column