Method and device for the reliable transmission of compressed network headers
First Claim
1. A method for transmitting data in a transmission system, the data being transmitted in the form of packets comprising at least one compressed header field and one data payload field and according to a format suited to the transmission system comprising the following steps:
- recovering the data packet to be transmitted which comprises a compressed header field and a payload field, identifying the header part from the payload field;
applying a selected forward error corrector (FEC) coding to the compressed header field of the data packet, and providing to a link layer a resulting new packet comprising the FEC coded compressed header and the uncoded payload, while also communicating a protection mode of the selected FEC coding;
generating the link layer header according to the transmission format of the transmission system integrating said protection mode, and an adaptation of a CRC checksum of the link layer; and
on reception, performing error corrector decoding in two steps, based on the protection mode integrated in the link layer header, said two steps including;
a first step of decoding a first part of the FEC coded compressed header, making it possible to deduce information regarding a size of the compressed header,a second step of decoding a remainder of the FEC coded compressed header on the basis of the previously determined size information.
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Abstract
Method for transmitting data in a transmission system, the data being transmitted in the form of packets including a compressed header field and a data field and according to a format suited to the transmission system comprising the following steps: recovering the data packet to be transmitted including a compressed header and useful data, identifying the header part from the useful-data part, applying a corrector coding which is selected at the level of the header, and providing the resulting new packet to the link layer, while also communicating the protection mode used, generating the link header according to the transmission format of the relevant transmission system integrating the mode of protection used, and the adaptation of the CRC checksum of the link layer, on reception, performing the error corrector decoding in two steps.
59 Citations
12 Claims
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1. A method for transmitting data in a transmission system, the data being transmitted in the form of packets comprising at least one compressed header field and one data payload field and according to a format suited to the transmission system comprising the following steps:
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recovering the data packet to be transmitted which comprises a compressed header field and a payload field, identifying the header part from the payload field; applying a selected forward error corrector (FEC) coding to the compressed header field of the data packet, and providing to a link layer a resulting new packet comprising the FEC coded compressed header and the uncoded payload, while also communicating a protection mode of the selected FEC coding; generating the link layer header according to the transmission format of the transmission system integrating said protection mode, and an adaptation of a CRC checksum of the link layer; and on reception, performing error corrector decoding in two steps, based on the protection mode integrated in the link layer header, said two steps including; a first step of decoding a first part of the FEC coded compressed header, making it possible to deduce information regarding a size of the compressed header, a second step of decoding a remainder of the FEC coded compressed header on the basis of the previously determined size information. - View Dependent Claims (3)
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2. A method for transmitting data in a transmission system, the data being transmitted in the form of packets comprising at least one compressed header field and one data payload field and according to a format suited to the transmission system comprising the following steps:
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recovering the data packet to be transmitted which comprises a compressed header field and a data payload field, identifying the header field from the payload field; applying a selected forward error corrector (FEC) coding to the compressed header field of the data packet, and providing to a link layer, a resulting new packet comprising the FEC coded compressed header and the uncoded payload, while also communicating a protection mode of the selected FEC coding; introducing parameters of the FEC coding in a frame check field of a link layer header, whose number of bytes is extended by one or more bytes dedicated to said protection mode and to the information regarding the size of the compressed header; and generating the link layer header according to a transmission format of the transmission system integrating said protection mode, and an adaptation of an CRC checksum of the link layer. - View Dependent Claims (4, 5, 6)
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7. A system for transmitting data, the data being transmitted in the form of packets comprising at least one compressed header field and one data payload field, comprising a sender and a decoder receiver wherein said sender comprises means for executing the following steps:
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recovering the data packet to be transmitted which comprises a compressed header field and a payload field, identifying the header part from the payload field; applying a selected forward error corrector (FEC) coding to the compressed header field of the data packet, and providing to a link layer a resulting new packet comprising the FEC coded compressed header and the uncoded payload, while also communicating a protection mode of the selected FEC coding; generating the link layer header according to the transmission format of the transmission system integrating said protection mode, and an adaptation of a CRC checksum of the link layer; and on reception, performing error corrector decoding in two steps, based on the protection mode integrated in the link layer header, said two steps including; a first step of decoding a first part of the FEC coded compressed header, making it possible to deduce information regarding a size of the compressed header, a second step of decoding a remainder of the FEC coded compressed header on the basis of the previously determined size information. - View Dependent Claims (9, 10, 11, 12)
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8. A system for transmitting data, the data being transmitted in the form of packets comprising at least one compressed header field and one data payload field, comprising a sender wherein said sender comprises means for executing the following steps:
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recovering the data packet to be transmitted which comprises a compressed header field and a data payload field, identifying the header field from the payload field; applying a selected forward error corrector (FEC) coding to the compressed header field of the data packet, and providing to a link layer, a resulting new packet comprising the FEC coded compressed header and the uncoded payload, while also communicating a protection mode of the selected FEC coding; introducing parameters of the FEC coding in a frame check field of a link layer header, whose number of bytes is extended by one or more bytes dedicated to said protection mode and to the information regarding the size of the compressed header; and generating the link layer header according to a transmission format of the transmission system integrating said protection mode, and an adaptation of an CRC checksum of the link layer.
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Specification