What is the fine-grained topic of the following text: Through the detection and retransmission functions that are provided by the two protocol components of SNACK-NS, namely, SNACK-Snoop and SNACK-TCP, the transmission performance of TCP over wireless network is greatly enhanced in both fixed host (FH) to mobile host (MH) and MH to FH transmissions. Only return the topic.
Enhancement of TCP transmission performance over wireless network through SNACK-NS protocol components.