US 12,407,438 B2
Signal frame processing method and related device
Wei Su, Dongguan (CN); Yujie Chen, Dongguan (CN); and Liang Sun, Dongguan (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Oct. 21, 2022, as Appl. No. 17/971,066.
Application 17/971,066 is a continuation of application No. PCT/CN2021/087175, filed on Apr. 14, 2021.
Claims priority of application No. 202010322079.5 (CN), filed on Apr. 22, 2020.
Prior Publication US 2023/0044113 A1, Feb. 9, 2023
Int. Cl. H04J 3/16 (2006.01); H04Q 11/00 (2006.01)
CPC H04J 3/1652 (2013.01) [H04Q 11/0062 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
receiving a signal frame, wherein a payload area of the signal frame bears a target service, and an overhead area of the signal frame comprises a node quantity field, the node quantity field comprising information indicating a quantity of nodes through which the target service has passed during transmission of the target service;
determining, based on the node quantity field, the quantity of nodes; and
performing delay compensation on the target service based on the quantity of nodes; and
wherein the signal frame is an optical service unit frame, the optical service unit frame comprises an overhead subframe and a data subframe, the data subframe bears the target service, and the overhead subframe comprises the node quantity field; or
wherein the signal frame is a flexible tributary unit frame, and the flexible tributary unit frame comprises a plurality of payload blocks, and an overhead area of at least one payload block in the plurality of payload blocks comprises the node quantity field.
 
14. 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 bears the target service, an overhead area of the first signal frame comprises a node quantity field, the node quantity field indicating a quantity of nodes through which the target service has passed during transmission of the target service, 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 has passed during transmission;
increase the first quantity by 1 to obtain a second quantity, and update the node quantity field of the first signal frame based on the second quantity; and
send the first signal frame having the updated node quantity field; and
the sink node is configured to:
receive the first signal frame having the updated node quantity field;
determine the second quantity based on the node quantity field; and
perform delay compensation on the target service based on the second quantity; and
wherein the first signal frame is an optical service unit frame, the optical service unit frame comprises an overhead subframe and a data subframe, the data subframe bears the target service, and the overhead subframe comprises the node quantity field; or
wherein the first signal frame is a flexible tributary unit frame, and the flexible tributary unit frame comprises a plurality of payload blocks, and an overhead area of at least one payload block in the plurality of payload blocks comprises the node quantity field.
 
17. A method comprising:
receiving a signal frame, wherein a payload area of the signal frame bears a target service, and an overhead area of the signal frame comprises a keep alive field, the keep alive field indicating that the target service is in an active state; and
determining, based on the keep alive field, that the target service is in the active state; and
wherein the signal frame is an optical service unit frame, the optical service unit frame comprises an overhead subframe and a data subframe, the data subframe bears the target service, and the overhead subframe comprises the keep alive field; or
wherein the signal frame is a flexible tributary unit frame, and the flexible tributary unit frame comprises a plurality of payload blocks, and an overhead area of at least one payload block in the plurality of payload blocks comprises the keep alive field.