| CPC H04L 47/34 (2013.01) [H04L 47/24 (2013.01)] | 16 Claims |

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1. A communication method, comprising:
receiving, by a user plane function network element, second data;
determining, by the user plane function network element based on first information, that the second data is retransmitted data of first data, wherein both the first data and the second data are data sent by an application server to a user side; and
sending, by the user plane function network element, first indication information to an access network network element, wherein the first indication information indicates that the second data is the retransmitted data, or the first indication information indicates a sending priority of the second data.
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