Abstract: Embodiments of the present application disclose a data transmission method, device, and system, and belong to the field of communications technologies. The method includes: receiving and temporarily storing, by a first node device, a designated service group sent by a second node device; and when the first node device needs to forward multiple SAToP or CESoPSN service packets in the temporarily stored designated service group, determining, by the first node device, whether an asynchronous SAToP or CESoPSN service packet exists in the designated service group, and if yes, acquiring, by the first node device, an adjustment value for the asynchronous SAToP or CESoPSN service packet according to a preset rule, and adjusting the asynchronous SAToP or CESoPSN service packet according to the adjustment value, so that the multiple SAToP or CESoPSN service packets in the designated service group are transmitted synchronously.

Abstract: Embodiments of the present application disclose a data transmission method, device, and system, and belong to the field of communications technologies. The method includes: receiving and temporarily storing, by a first node device, a designated service group sent by a second node device; and when the first node device needs to forward multiple SAToP or CESoPSN service packets in the temporarily stored designated service group, determining, by the first node device, whether an asynchronous SAToP or CESoPSN service packet exists in the designated service group, and if yes, acquiring, by the first node device, an adjustment value for the asynchronous SAToP or CESoPSN service packet according to a preset rule, and adjusting the asynchronous SAToP or CESoPSN service packet according to the adjustment value, so that the multiple SAToP or CESoPSN service packets in the designated service group are transmitted synchronously.

Abstract: A handling method for cell concatenation, includes receiving a cell of a packet before a concatenation timeout period expires and before the total number of received cells of the packet reaches a concatenation number. The method further includes determining whether an end-of-packet cell of the packet is received. If the end-of-packet cell of the packet is received, the received cell of the packet is encapsulated into a first PWE3 packet. The first PWE3 packet is sent to an MPLS network. The present application relieves a limit of the concatenation number or the concatenation timeout period in a cell concatenation process of the packet so as to reduce a delay and a jitter of the packet caused by the cell concatenation.