Network master device and network communication method for realizing cooperative service set

A network device for realizing a cooperative service set, comprising:

• at least one service set port;
• a network port;
• a control circuit, for controlling a first wireless serving device and a second wireless serving device, wherein the first wireless serving device and the second wireless serving device are wirelessly connected with a wireless terminal device with a first terminal address concurrently;
• wherein the control circuit executes following steps:
• receiving a first uplink packet and a second uplink packet via the at least one service set port, wherein the first uplink packet has a first source address and is from the first wireless serving device, the second uplink packet has the first source address and is from the second wireless serving device, and the first source address equals to the first terminal address;
• using at least the first uplink packet and the second uplink packet to generate a transmission packet;
• transmitting the transmission packet to an external network via the network port;
• and
• transmitting at least one downlink packet to the first wireless serving device via the at least one service set port according to a reception packet from the external network, wherein a destination address of the at least one downlink packet is the first terminal address.