Wireless terminal device and node device

A wireless terminal device comprising:

• a wireless interface part having an interface with a wireless transmission path at a physical layer;
• a link forming part accessing the wireless transmission path via the wireless interface part and forming a particular link on the wireless transmission path;
• a transmission/reception part transmitting and/or receiving transmission information via the particular link formed by the link forming part;
• and
• a transmission information monitoring part for monitoring, for each link, the amount of the transmission information handled by the transmission/reception part, or an increasing rate of the amount of the transmission information,
• the wireless transmission path being formed as a physical channel to which a CSMA system is applied, the CSMA system securing a given transmission quality with respect to a total of a number of links concurrently formable and an amount of the transmission information,
• the link forming part forming the particular link on the wireless transmission path, the particular link sharing the wireless transmission path with one or more additional links each associated with an additional wireless terminal device, the particular link and the one or more additional links each being formed with an initialization of the wireless transmission path and persisting while the wireless transmission path remains active, and
• the link forming part change, as to the particular link formed in advance, a transmission capacity to a value which ensures a predetermined transmission quality in accordance with the amount of the transmission information or the increasing rate monitored by the transmission information monitoring part, and alternatively substituting another link having another transmission capacity greater than that of the particular link.