Method and apparatus for detecting transmission errors in cordle

Details Method and apparatus for detecting transmission errors in cordle Method and apparatus for detecting transmission errors in cordle

1988-07-06

1991-01-01

Atkinson, Charles E.

Excavating

371 671, 379 62, H04Q 704, G06F 1100

Patent

active

049824015

ABSTRACT:
The invention provides means for detecting errors in the transmission of protocol data words between the handset station and base station of a cordless telephone set. Assuming the protocol data words are eight bits in length, a sixteen bit security code word is provided which consists of a high security byte and a low security byte. At the transmitting station (either the hand set or base), the protocol data byte is exclusive-ored with both the high security byte and the low security byte. The two resulting bytes are appended to the original protocol data byte to form a twenty-four bit error detection code. This error detection code is transmitted to the receiving station. The receiving station takes the unaltered protocol byte portion of the three byte word and exclusive-ors it with both of the other bytes of the received word. If there were no transmission errors, the sixteen bit security code should be generated by the exclusive-oring step. If the resulting sixteen bit word does not match the security code stored in the memory of the receiving station, then an error is indicated and the receiving station request a retransmission of the data.

REFERENCES:
patent: 4394642 (1983-07-01), Currie et al.
patent: 4467140 (1984-08-01), Fathauer et al.
patent: 4564941 (1986-01-01), Woolley et al.
patent: 4593155 (1986-06-01), Hawkins
patent: 4639550 (1987-01-01), Yamagawa et al.
patent: 4723246 (1988-02-01), Weldon, Jr.
patent: 4736404 (1988-04-01), Anglikowski et al.
patent: 4794636 (1988-12-01), Sanglier et al.
patent: 4833702 (1989-05-01), Shitara et al.

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