Signal Frame Processing Method and Related Device

A signal frame processing method, comprising:

• receiving a first signal frame, wherein a payload area of the first signal frame is used to bear a target service, and an overhead area of the first signal frame comprises a node quantity field;
• determining, based on the node quantity field, a first quantity of nodes through which the target service passes during transmission;
• increasing the first quantity by 1, to obtain a second quantity, and updating the first signal frame based on the second quantity;
• and
• sending the updated first signal frame.

An optical transport system, comprising a source node, an intermediate node, and a sink node, wherein

• the source node is configured to:
• receive a target service;
• map the target service to a first signal frame, wherein a payload area of the first signal frame is used to bear the target service, an overhead area of the first signal frame comprises a node quantity field, the node quantity field is used to indicate a quantity of nodes through which the target service passes during transmission, and set a value of the quantity to 1;
• and
• send the first signal frame;
• the intermediate node is configured to:
• receive the first signal frame;
• determine, based on the node quantity field, a first quantity of nodes through which the target service passes during transmission;
• increase the first quantity by 1, to obtain a second quantity, and update the first signal frame based on the second quantity;
• and
• send the updated first signal frame;
• and
• the sink node is configured to:
• receive the updated first signal frame;
• determine the second quantity based on the node quantity field;
• and
• perform delay compensation on the target service based on the second quantity.

The optical transport system according to claim 18, wherein if the source node does not receive the target service in a target cycle, the source node is further configured to:

• generate a second signal frame, wherein an overhead area of the second signal frame comprises a keep alive field;
• and
• send the second signal frame;
• the intermediate node is further configured to:
• determine, based on the keep alive field, that the target service is in an active state;
• and
• send the second signal frame;
• and
• the sink node is further configured to:
• determine, based on the keep alive field, that the target service is in the active state.