Packet processing method and network device in hybrid access network

A first network device in a hybrid access network, the first network device comprising:

• a first cache, configured to store a first sending window;
• a second cache, configured to store a second sending window;
• a transceiver, configured to send a first data packet in the first sending window to a second network device by using a first tunnel established between the first network device and the second network device, wherein the first data packet comprises a first sub-link number for representing a sequence number of the first data packet in the first tunnel;
• a processor, configured to:
• in response to receiving a first acknowledgement response sent by the second network device, increase a size of the first sending window based on a first proportion, wherein the first acknowledgement response comprises a first acknowledgement number, the first acknowledgement number is obtained based on the first sub-link number;
• in response to not receiving, within a first time, the first acknowledgement response sent by the second network device, decrease the size of the first sending window based on a second proportion, wherein the second proportion is greater than the first proportion;
• wherein the transceiver is further configured to receive a second data packet, wherein a next hop through which the second data packet passes to arrive at a destination address is the second network device;
• wherein the processor is further configured to:
• in response to determining that the size of the first sending window is greater than or equal to a first threshold, store the second data packet into the second storage unit, so that the second data packet enters the second sending window;
• and
• wherein the transceiver is further configured to send the second data packet to the second network device by using the second tunnel.

A second network device in a hybrid access network, the second network device comprising:

• a transceiver, configured to:
• receive a first data packet that is in a first sending window of a first network device and that is sent by the first network device by using a first tunnel, wherein the first data packet comprises a first global number, and the first global number represents a sequence number of the first data packet in a virtual binding tunnel, wherein the virtual binding tunnel is a tunnel bound and connected by the first tunnel and a second tunnel, the first tunnel and the second tunnel are established between the first network device and the second network device;
• and
• receive a second data packet that is in a second sending window of the first network device and that is sent by the first network device by using the second tunnel, wherein the second data packet comprises a second global number, and the second global number represents a sequence number of the second data packet in the virtual binding tunnel;
• a processor, configured to:
• store the first data packet and the second data packet into a sorting cache, and sort the first data packet and the second data packet based on the first global number and the second global number;
• wherein the transceiver is further configured to:
• send a first acknowledgement response to the first network device for notifying the first network device that the second network device has received the first data packet and instruct the first network device to increase a size of the first sending window based on a first proportion;
• and
• send a second acknowledgement response to the first network device for notifying the first network device that the second network device has received the second data packet and instruct the second network device to increase a size of the second sending window based on a third proportion.