LAN interfacing apparatus
AssigneeLG Electronics Inc.
InventorSang Cheol Kim
Life of this patent
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Abstract
A LAN interface using an Ethernet protocol is disclosed. The interface includes an Ethernet controller, which performs a control operation for LAN interfacing, a codec, which codes and decodes transmission/reception data, and a transceiver, which detects LAN collisions while data is being transmitted/received. It further includes a retransmission control circuit, which is coupled between the Ethernet controller and the codec and outputs the n-th data in accordance with a back-off algorithm after delaying a certain time when the n−1 data collisions occur on the same frame.
Claims31
A Local Area Network (LAN) interfacing apparatus, comprising:
- an Ethernet controller, which performs a control operation for LAN interfacing;
- a codec, which is coupled to the Ethernet controller and which codes and decodes transmission/reception data;
- a transceiver, which is coupled to the codec and which transmits/receives data and detects data collisions on a LAN;
- and
- a retransmission control circuit, which is coupled between the Ethernet controller and the codec, to retransmit data after a prescribed delay period when a prescribed number of collisions occur on the LAN, wherein the retransmission control circuit comprises:
- a collision control unit to detect a collision and output a collision control signal;
- a first switch to switch a transmission data path output from the Ethernet controller between a first path and a second path based on the collision control signal;
- a buffer on the second path to store data;
- a second switch coupled to the first switch along the first path and coupled to the buffer along the second path, the second switch to pass the data to the codec.
A retransmitting control circuit of a Local Area Network (LAN) interfacing apparatus, comprising:
- a collision control unit, which detects a (n−1)th collision, outputs a collision control signal, and cuts off a collision signal inputted to an Ethernet controller from a codec when the (n−1)th collision occurs, wherein n is greater than or equal to two;
- a reception control unit, which stops a transmission of a next frame by outputting a reception enable signal to the Ethernet controller in response to the collision control signal;
- a first switch, which switches transmission data outputted from the Ethernet controller to a first path or a second path in response to the collision control signal;
- a serial/parallel converter, which is placed on the second path to convert transmission data outputted from the first switch into parallel data;
- a buffer, which stores an output of the serial/parallel converter;
- a parallel/serial converter, which converts an output of the buffer into parallel data;
- a second switch, which is placed on the first path to switch between an output of the first switch or the parallel/serial converter;
- and
- a buffer control unit, which controls write and output operations of the transmission data stored in the buffer.
Dependencies are inferred from the claim text.