Digital microwave radio system and method with encryption
First Claim
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1. A secure digital microwave radio terminal, comprising:
- at least one Ethernet interface;
a payload mapper that extracts one or more bytes from the data on the Ethernet interface including an inter-frame gap, having a first byte and a last byte that are Ethernet control words and at least one other byte with random bits, fragments the inter-frame gap into one or more blocks of data, and receives and inserts into the one or more blocks of data, data from a pseudo random sequence generator in response to a determination that there is no inter-frame gap to fragment into the one or more blocks of data;
at least one cipher unit that encrypts each block of data into a ciphertext block of data; and
at least one forward error correction encoding unit that adds error-check overhead bits to the ciphertext block of data before transmission over a microwave link.
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Abstract
A communications system are provided that provides integrated encryption capabilities. In particular, a digital microwave system, terminal and method are provided in which the encryption functions are integrated into the digital microwave terminals. The digital microwave system may also be implemented with external encryption units.
101 Citations
24 Claims
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1. A secure digital microwave radio terminal, comprising:
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at least one Ethernet interface; a payload mapper that extracts one or more bytes from the data on the Ethernet interface including an inter-frame gap, having a first byte and a last byte that are Ethernet control words and at least one other byte with random bits, fragments the inter-frame gap into one or more blocks of data, and receives and inserts into the one or more blocks of data, data from a pseudo random sequence generator in response to a determination that there is no inter-frame gap to fragment into the one or more blocks of data; at least one cipher unit that encrypts each block of data into a ciphertext block of data; and at least one forward error correction encoding unit that adds error-check overhead bits to the ciphertext block of data before transmission over a microwave link. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A process for securing a microwave link, comprising:
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extracting an inter-frame gap, having a first byte and a last byte that are Ethernet control words and at least one other byte with random bits, from an interface carrying Ethernet traffic; fragmenting the inter-frame gap into one or more blocks of data; receiving and inserting into the one or more blocks of data, data from a pseudo random sequence generator in response to a determination that there is no inter-frame gap to fragment into the one or more blocks of data; encrypting each block of data into a ciphertext block; adding forward error corrected overhead words to generate an encrypted forward error corrected bitstream; and transmitting the encrypted forward error corrected bitstream over a microwave link. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification