| CPC H04W 28/0268 (2013.01) [H04L 1/1816 (2013.01); H04W 8/02 (2013.01)] | 20 Claims |

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1. A data transmission method, comprising:
receiving policy information transmitted by a core network device and related to a Protocol Data Unit (PDU) session, the policy information instructing transmission delay monitoring to be performed on data sub-packets obtained by splitting a data packet of an interactive service;
in response to identifying that a data sub-packet transmitted by a previous node is one of the data sub-packets obtained by splitting the data packet of the interactive service, detecting, according to the policy information in a process of transmitting the data sub-packets to a subsequent node, whether transmission of the one of the data sub-packets meets a delay requirement; and
in response to detecting that the transmission of the one of the data sub-packets does not meet the delay requirement, stopping transmitting remaining data sub-packets subsequent to the one of the data sub-packets obtained by splitting the data packet of the interactive service to the subsequent node.
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