Multicast service processing method and access device

An access device, the access device comprising a receiver, a transmitter, and a processor, wherein

• the receiver is configured to receive an on-demand request sent by a program terminal;
• the transmitter is configured to separately send the on-demand request to a multicast source device through a first uplink port of the access device and a second uplink port of the access device, so that the multicast source device sends first multicast packets and second multicast packets based on the on-demand request;
• the receiver is further configured to:
• receive the first multicast packets through the first uplink port of the access device, and receive the second multicast packets through the second uplink port of the access device;
• the processor is further configured to obtain a multicast data stream based on attribute information of the first multicast packets and attribute information of the second multicast packets;
• and
• the transmitter is further configured to send the obtained multicast data stream to the program terminal,
• wherein the access device simultaneously handles the first multicast packet and the second multicast packet to obtain the multicast data stream, and the handling of the access device includes simultaneously counting each receiving time of the first multicast packet and the second multicast packet,
• wherein a time threshold for receiving of the first multicast packet and the time threshold for receiving of the second multicast packet are simultaneously calculated, and if both the first multicast packet and the second multicast packet are not received within the time threshold, the access device considers that a multicast packet with first sequence information does not exist, and the access device directly obtains the first multicast packet and the second multicast packet of a next sequence, in order to minimize a forwarding delay.