Transmitting and receiving method and apparatus, channel protection method and system

Abstract

The invention discloses a transmitting and receiving method through a plurality of implementation manners, and a transmitting and receiving device which can realize service data reconstruction under the conditions of error codes and invalid channels, as well as a protection method under the condition of invalid channel and a channel protection system with the corresponding transmitting / receiving device. The channel protection method comprises the steps of conducting in-band redundancy encoding for each service channel used for delivering service information; taking one or more out-band channels as standby channels; conducting error correction for the service channel through the in-band redundancy coding when the service channel generates a random / rectifiable error code; and conducting error correction for the service channel through standby channels when the service channel generates non-rectifiable errors or when the channel is invalid. The implementation manners of the invention overcomes the technical problems in the prior art that service goes through intermittent disconnection and a small error code and a big error code can not be protected effectively and simultaneously, thereby improving the reliability of communication network / devices and realizing flexible protection of both a small system and a big system.

Description

technical field [0001] The present invention relates to a sending and receiving method, in particular to a sending and receiving method for recovering service data under the condition of code error and channel failure; A sending and receiving device for service recovery; the present invention further relates to a protection method for recovering service data in case of code error and channel failure and a channel protection system with a corresponding sending / receiving device, belonging to the field of communication technology. Background technique [0002] In the field of communication technology, in order to provide stable and reliable end-to-end communication services, it is necessary to improve the reliability of the communication channel and reduce the failure rate of the communication channel. However, there are many unavoidable interference factors in the actual communication environment, such as fiber breakage, excessive optical loss, and optical signal interference ...

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Problems solved by technology

[0006] In the process of realizing the present invention, the inventors have found that the first method has at least the following problems: this method can correct and detect small errors in the communication channel, such as figure 1 It can correct 1 bit error in 4 bits, and can also detect errors greater than 1 bit in 4 bits, but it cannot restore communication services in the event of a large error or failure of the communication channel;

[0008] In the process of realizing the present invention, the inventor found that there are at least the following problems in the second method: this method can switch to the backup channel when the working channel fails, and recover from the failure as soon as possible, but it can only be performed after the problem is found. Protection, cannot avoid business interruption; and in order to prevent frequent misoperations, channel switching usually requires a certain delay time, and the quality of the communication channel can only be started when the cracking of the communication channel reaches a certain level, so it cannot effectively protect small bit errors

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