Method and device for facilitating efficient data transfer via a wireless communication network

摘要

A wireless network system capable of controlling highly efficient transfer of AV data by an upper application, using information indicating a wireless link condition that varies dynamically is disclosed. In this wireless network system, a wireless terminal (1021) and a wireless gateway apparatus (1011) each store collected wireless link condition information in a descriptor. An upper application on the wireless terminal (1021) reads the descriptor at the local terminal device and obtains wireless LAN link condition information. The wireless gateway apparatus (1011) makes notification to a wireless terminal of a VTR, for example, that actually exists in a 1394 terminal as if it existed as a sub-unit in the local terminal device. The wireless terminal (1021) accesses the collected wireless link condition information (S311) and selects a AV/C command to be sent to the VTR sub-unit of the wireless gateway apparatus (S314). The wireless terminal (1021) transfers the play command for playback to the wireless gateway apparatus (S315). The wireless gateway apparatus (1011) transfers the play command to a VTR sub-unit within a terminal on the wired network (S316). In accordance with this action, the VTR sub-unit within the terminal on the wired network starts transfer of AV data (S317).