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US 5,844,918 AGranted
Digital transmission/receiving method, digital communications method, and data receiving apparatus
AssigneeSanyo Electric Co., Ltd.
InventorMasami Kato
Life of this patent
Estimating the term…
Abstract
An error correcting code including of basic data and a BCH-based parity code appended thereto is divided into smaller packets. An error detecting code is appended to each of the thus-divided packets, so that transmission basic data is formed. When the transmission basic data is received, the basic data and a BCH-based parity code are derived from the transmission basic data. Error correcting is carried out with respect to the overall transmission basic data. An error detecting operation is carried out with respect to each packet using the error detecting code. If a packet is found to contain errors, a request for retransmission of that packet will be sent to the sending side.
Claims38
A digital transmission method for sending a digital signal, comprising:
- a division step of dividing an error correcting code which includes basic data and a parity code, into smaller data segments;
- an error detecting code addition step of appending an error detecting code to each of the data segments divided in the division step;
- a transmission step of sending the data segments complete with the error detecting code on a packet-by-packet basis;
- and
- a retransmission step of retransmitting a requested data packet in response to a retransmission request of the data packet from a receiving side.
2 more elements
A digital receiving method for receiving a digital signal, comprising:
- a receiving step of receiving transmission data that comprises smaller packets, each having an error detecting code, into which an error correcting code consisting of basic data and a parity code appended thereto is divided:
- an error correcting step of carrying out an error correcting operation with respect to the overall received basic data using the error correcting code;
- an error detecting step of carrying out an error detecting operation with respect to at least one packet of the error-corrected basic data;
- and
- a request step of requesting retransmission of at least one of the packets found to contain an error, from the sending side.
2 more elements
A digital receiving method for receiving a digital signal, comprising:
- a receiving step of receiving transmission data that comprises smaller packets, each having an error detecting code, into which an error correcting code including basic data and a parity code appended thereto is divided;
- a first error detecting step of carrying out an error detecting operation with respect to at least one packet of the received basic data;
- an error correcting step of carrying out an error correcting operation with respect to the overall basic data using an error correcting code when the packet is found to contain an error in the first error detecting step;
- a second error detecting stop of carrying out an error detecting operation with respect to at least one packet of the error-corrected basic data;
- and
- a request step of requesting retransmission of at least one of the Packets found to contain an error, from the sending side.
3 more elements
A digital communications method for sending a digital signal, comprising:
- at the sending end,
- a division step of dividing an error correcting code which includes basic data and a parity code, into smaller data segments;
- an error detecting code addition stop of appending an error detecting code to each of the data segments divided in the division step;
- a transmission step of sending the data segments complete with the error detecting code on a packet-by-packet basis;
- a retransmission step of retransmitting a requested data packet in response to a retransmission request of the data packet from a receiving side;
- at the receiving end,
- a receiving step of receiving the transmission data sent in the transmission step;
- an error correcting step of carrying out an error correcting operation with respect to the overall received basic data using the error correcting code:
- an error detecting step of carrying out an error detecting operation with respect to at least one packet of the error-corrected basic data;
- and
- a request step of requesting retransmission of at least one of the packets found to contain an error, from the sending side.
8 more elements
A digital communications method, comprising:
- at the sending end,
- a division step of dividing an error correcting code which includes basic data and a parity code, into smaller data segments;
- an error detecting code addition step of appending an error detecting code to each of the data segments divided in the division step;
- a transmission step of sending the data segments complete with the error detecting code on a packet-by-packet basis;
- a retransmission step of retransmitting a requested data packet in response to a retransmission request of the data packet from a receiving side;
- and
- at the receiving end,
- a receiving step of receiving the data transmitted in the transmission step;
- a first error detecting step of carrying out an error detecting operation with respect to at least one packet of the received basic data;
- a first error correcting step of carrying out an error correcting operation with respect to the overall basic data using an error correcting code when the packet is found to contain an error in the first error detecting step;
- a second error detecting step of carrying out an error detecting operation with respect to at least one packet of the error-corrected basic data;
- and
- a request step of requesting retransmission of at least one of the packets found to contain an error, from the sending side.
10 more elements
A data receiving apparatus that receives data complete with a parity code and an error detecting code, comprising:
- a receiving circuit for receiving transmission data that comprises smaller packets, each having an error detecting code, into which an error correcting code including basic data and a parity code appended thereto is divided;
- an error correcting circuit for carrying out an error correcting operation with respect to the overall received basic data using the error correcting code;
- an error detecting circuit for carrying out an error detecting operation with respect to at least one packet of the error-corrected basic data;
- and
- a transmission circuit for requesting retransmission of at least one of the packets found to contain an error, from the sending side.
2 more elements
A data receiving apparatus that receives data complete with a parity code and an error detecting code, comprising:
- a receiving circuit for receiving transmission data that comprises smaller packets, each having an error detecting code, into which an error correcting code including basic data and a parity code appended thereto is divided;
- a first error detecting circuit for carrying out an error detecting operation with respect to at least one packet of the received basic data;
- an error correcting circuit for carrying out an error correcting operation with respect to the overall basic data using an error correcting code when the packet is found to contain an error in the first error detecting step:
- a second error detecting circuit for carrying out an error detecting operation with respect to at least one packet of the error-corrected basic data;
- and
- a transmission circuit for requesting retransmission of at least one of the packets found to contain an error, from the sending side.
3 more elements
Dependencies are inferred from the claim text.