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Home Communications Radio-relay-apparatus

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 Radio relay apparatus

Details
Inventors: Nakamura, Tomohiro;
Assignee: Fujitsu Limited (Kanagawa, JP)
Primary Examiner: Vo; Don N.
Assistant Examiner:
Attorney, Agent or Firm: Helfgott & Karas, PC.

A radio relay apparatus complying with SDH is provided which permits the value of B2 bytes received from a transmitting-side terminal station to be sent to a receiving-side terminal station even in the case where resetting of a pointer value is performed. B2 sampling means of the radio relay apparatus samples B2 byte information, and B2 recomputing means again performs B2 parity computation of received transmission information which has been subjected to the pointer value resetting. Adding means adds bit by bit the data sampled by the B2 sampling means to the data obtained by the B2 recomputing means, and transmitting means transmits the sum obtained by the adding means to a subsequent radio relay apparatus. Based on the sum transmitted from the transmitting means, the subsequent radio relay apparatus judges that data which is a subject of B2 parity computation and which corresponds to a bit having the value "1" is erroneous.

DETAILED DESCRIPTION An object of the present invention is to provide a radio relay apparatus which permits the value of B2 bytes, which is received from a transmitting-side terminal station, to be sent to a receiving-side terminal station even in the case where resetting of a pointer value is performed.
To achieve the above object, a radio relay apparatus complying with SDH is provided.
The radio relay apparatus comprises B2 sampling means for sampling B2 byte information included in transmission information sent from a transmission terminal station, B2 recomputing means for performing B2 parity computation again for the transmission information, adding means for adding bit by bit the data sampled by the B2 sampling means to data obtained by the B2 recomputing means, and transmitting means for transmitting a sum obtained by the adding means to a subsequent radio relay apparatus.
The above and other objects, features and advantages of the present invention will become apparent from the following description when taken in conjunction with the accompanying drawings which illustrate preferred embodiments of the present invention by way of example.



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