A physical layer circuit of a receiver, a clock recovery circuit and a calibration method of frequency offset are provided. The physical layer circuit includes an equalizer and a clock recovery circuit. The equalizer generates an equalized sampling signal corresponding to a sampling clock signal. The clock recovery circuit includes a phase detector, a loop filter, a free wheel circuit, an output circuit and a controller. The phase detector calculates phase differences according to the equalized sampling signal. The loop filter generates loop pulses according to the phase differences. The free wheel circuit generates free wheel pulses. The output circuit receives the loop pulses and the free wheel pulses and generates corresponding phase-shifting pulses for adjusting the sampling clock signal. The controller calculates an accumulative correction offset according to the phase-shifting pulses, and the free wheel circuit periodically generates the free wheel pulses accordingly.

A method for evaluating signal data includes a bus signal channel supplying the signal data, a reference channel supplying reference signal values, which form the basis of the signal data, and a computer performing a signal interpretation based on an interpretable portion of the signal data and on the reference signal values, and reconstructing a signal based on the interpretation.

This invention is related to an Express Traversal (EXTRA) Network on Chip (NoC) comprising a number of EXTRA routers. The EXTRA NoC comprises a Buffer Write and Route Computation (BW/RC) pipeline, a Switch Allocation-Local (SA-L) pipeline, a Setup Request (SR) pipeline, a Switch Allocation-Global (SA-G) pipeline, and a Switch Traversal and Link Traversal (ST/LT) pipeline. The BW/RC pipeline is configured to write an incoming flit to an input buffer(s) of a start EXTRA router and compute the route for the incoming head flit by selecting an output port to depart from the start EXTRA router. The SA-L pipeline is configured to arbitrate the start EXTRA router to choose an input port and an output port for a winning flit. The SR pipeline is configured to handle the transmission of a number of SR signals from the start EXTRA router to downstream EXTRA routers.

Certain features relate to improving the link-fault tolerance in a distributed antenna system (DAS) by utilizing a series of synchronous communication frames. A receiving remote unit or a head-end unit in the DAS can predict the start of incoming communication frames based on frame information extracted from previously received communication frames. For example, a remote unit can be configured to receive one or more communication frames, each of the one or more communication frames including a start-of-frame field. After a period of time corresponding to the frame repetition rate, the remote unit can search for an additional start-of-frame field, indicating the receipt of the next communication frame. The remote unit can extract the payload data from the next communication frame based on the predicted value for the additional start-of-frame field.

A device that includes a plurality of transceivers configurable to simultaneously operate with a combination of bonded and unbonded transceivers. A first transceiver of the plurality of transceivers is operable at a first data rate, and a second transceiver of the plurality of transceivers is simultaneously operable at a second data rate that is different than the first data rate. The first and second transceivers are operable as bonded transceivers and wherein a third transceiver, of the plurality of transceivers, is simultaneously operable at a third data rate and the third transceiver is not bonded with any other transceiver.

Certain features relate to improving the link-fault tolerance in a distributed antenna system (DAS) by utilizing a series of synchronous Ethernet frames. A receiving remote unit or a head-end unit in the DAS can predict the start of incoming Ethernet frames based on frame information extracted from previously received Ethernet frames. For example, a remote unit can be configured to receive one or more Ethernet frames, each of the one or more Ethernet frames including a start-of-frame field. After a period of time corresponding to the frame repetition rate, the remote unit can search for an additional start-of-frame field, indicating the receipt of the next Ethernet frame. The remote unit can extract the payload data from the next Ethernet frame based on the predicted value for the additional start-of-frame field.

A device that includes a plurality of transceivers configurable to simultaneously operate with a combination of bonded and unbonded transceivers. A first transceiver of the plurality of transceivers is operable at a first data rate, and a second transceiver of the plurality of transceivers is simultaneously operable at a second data rate that is different than the first data rate. The first and second transceivers are operable as bonded transceivers and wherein a third transceiver, of the plurality of transceivers, is simultaneously operable at a third data rate and the third transceiver is not bonded with any other transceiver.

A method and apparatus in which a data stream is received that includes constant bit rate (CBR) carrier streams, at least one of which comprises frames, a cumulative phase offset report (CPOR) and a client rate report (CRR). A counter accumulating a PHY-scaled stream clock (IPSCk) is sampled at a nominal sampling period (Tps) to obtain a cumulative PHY-scaled count (CPSC). A PHY-scaled stream phase offset (PSPO) is calculated that indicates phase difference between PHY-scaled stream nominal bit count (LPSD) and an incoming PHY-scaled count delta (IPSD). The data stream is demultiplexed to obtain CBR carrier streams. Respective CBR carrier streams include a previous network node CPOR (CPOR-P) and a previous network node CPO (CPO-P). A CPO is calculated that is a function of CPO-P and PSPO. CPO-P is replaced with the calculated CPO. The CBR carrier streams are multiplexed into intermediate-network-node data streams that are transmitted from the intermediate-network-node.

The present invention relates to a computing apparatus as an element of a network structure using a method for acquiring and maintaining cell locked data transfer amongst a number of computing apparatuses. A predefined number of symbols transmitted as a cell is followed by a variable number of idle symbols to ensure the nominally simultaneous start of the cell transfers throughout the network without a central control. At specific positions of the cells each computing apparatus broadcasts a list of its transmission requests and receiver capabilities to all other computing apparatuses. Each of the interconnected computing apparatuses executes the same arbitration procedure based on the identical data set of transmission requests and receiver capabilities. As a result transmission paths are assigned for direct transmission and for payload forwarding. The transmission paths can be assigned per cell period individually for both directions of each link.