Abstract: A network device including an address move detection unit, a loop detection packet generation unit, a packet parser unit and a loop determination unit coupled to the packet parser unit is provided. The address move detection unit detects whether an address field of a first packet received by the network device is moved. The loop detection packet generation unit generates a loop detection packet if the address move detection unit detects that the address field is moved. The packet parser unit parses a second packet received by the network device to extract an information. Based on the information, the loop determination unit determines whether the second packet matches the loop detection packet so as to determine whether there is any loop existing in the network device.

Abstract: A low power consumption network device includes: a data rate meter for detecting a data rate of the network device; a state machine unit for determining a state of the network device according to the data rate and for generating an instruction signal; and a power control unit for controlling a power consumption state of the network device according to the instruction signal. According to the data rate, the state machine unit controls whether the network device transmits a pause frame to a link partner, so that the link partner stops transmitting data to the network device during a pause period. During the pause period, the power control unit controls the network device into a power saving mode.

Abstract: A low power consumption network device includes: a data rate meter for detecting a data rate of the network device; a state machine unit for determining a state of the network device according to the data rate and for generating an instruction signal; and a power control unit for controlling a power consumption state of the network device according to the instruction signal. According to the data rate, the state machine unit controls whether the network device transmits a pause frame to a link partner, so that the link partner stops transmitting data to the network device during a pause period. During the pause period, the power control unit controls the network device into a power saving mode.

Abstract: A network device including an address move detection unit, a loop detection packet generation unit, a packet parser unit and a loop determination unit coupled to the packet parser unit is provided. The address move detection unit detects whether an address field of a first packet received by the network device is moved. The loop detection packet generation unit generates a loop detection packet if the address move detection unit detects that the address field is moved. The packet parser unit parses a second packet received by the network device to extract an information. Based on the information, the loop determination unit determines whether the second packet matches the loop detection packet so as to determine whether there is any loop existing in the network device.

Abstract: The present invention provides a communication apparatus. The communication apparatus includes a first processing circuit for processing data of a first network layer to generate a first parallel data; a parallel-to-serial converting unit coupled to the first processing circuit for generating a serial data according to the first parallel data generated by the first processing circuit; a transmitting interface coupled to the parallel-to-serial converting unit for transmitting the serial data generated by the parallel-to-serial converting unit; a serial-to-parallel converting unit coupled to the transmitting interface for converting the serial data transmitted by the transmitting interface into a second parallel data; and a second processing circuit for processing the second parallel data to generate data corresponding to a second network layer; wherein a transmitting frequency of the transmitting interface is different from operating frequencies of the first and the second processing circuit.

Abstract: A bandwidth control method and a bandwidth control device for a network switch are disclosed. When a client port has a packet to be transmitted, the average traffic rate Tr[n+1] of the client port generated before the time slot n+1 is determined by Tr[n+1]=g*Tr?[n]+(1?g)*Tr[n], where g<1, Tr?[n] is the traffic rate of the client port in time slot n, and Tr[n] is an actual average traffic rate generated before time slot n. Only when Tr[n+1] is smaller than the bandwidth threshold Tr_pre of the client port, the packet is allowed to be transmitted.

Abstract: A network interface includes a first network layer and a second network layer. The apparatus includes a first serial interface coupled to the first network layer and a second serial interface coupled to the second network layer. The first serial interface is for converting the first parallel data received from the first network layer into a first serial signal, and outputting the first serial signal serially. The second serial interface is for receiving and converting the first serial signal into the first parallel data, and sending the first parallel data to the second network layer.

Abstract: A bandwidth control method and a bandwidth control device for a network switch are disclosed. When a client port has a packet to be transmitted, the average traffic rate Tr[n+1] of the client port generated before the time slot n+1 is determined by Tr[n+1]=g*Tr &Dgr;[n]+(1−g)*Tr[n], where g<1, Tr&Dgr;[n] is the traffic rate of the client port in time slot n, and Tr[n] is an actual average traffic rate generated before time slot n. Only when Tr[n+1] is smaller than the bandwidth threshold Tr_pre of the client port, the packet is allowed to be transmitted.

Abstract: A network control method which employs a fuzzy theory to calculate the time point of producing the interrupt signal, so as to produce the interrupt signal in time before the data of the packet is completely stored in the buffer memory or the data buffer of the hot system. This invention relates also the hardware apparatus adapted for the application of the network control method.