Base station apparatus for radiocommunication network, method of controlling communication across radiocommunication network, radiocommunication network system, and radio terminal apparatus

A method of controlling communication across a radiocommunication network which comprises one or more radio terminal apparatuses and a base station apparatus which establishes communication with the radio terminal apparatuses according to a frequency hopping scheme, wherein

• said base station apparatus searches for another radiocommunication network in the vicinity of said base station apparatus when said base station apparatus is started;
• and when another radiocommunication network is detected, said base station apparatus obtains the pattern and time of frequency hopping in said radiocommunication network, selects said pattern as the frequency hopping pattern for said base station apparatus, selects, on the basis of the time obtained, timing at which the frequency hopping based on said pattern does not cause frequency interference with respect to frequency hopping in said another radiocommunication network, and executes frequency hopping of said pattern at the thus-selected timing.

A base station apparatus for a radiocommunication network which establishes radio communication with one or more radio terminal apparatuses, said base station apparatus comprising:

• a load state detection section for detecting the state of load on a radiocommunication network during the course of exchange of data between said base station apparatus and said radio terminal apparatus;
• and
• a modification section which dynamically changes the maximum back-off time for preventing collision between data, in accordance with the state of load detected by said load state detection section.

A base station apparatus for a radiocommunication network which establishes radio communication with one or more radio terminal apparatuses, said base station apparatus comprising:

• a load state detection section for detecting the state of load on a radiocommunication network during the course of exchange of data between said base station apparatus and said radio terminal apparatus;
• and
• a modification section which determines whether to add a control frame when a frame of data is transmitted, in order to ensure a period during which a transmission path is occupied, in accordance with the state of load detected by said load state detection section, and which dynamically modifies the state of addition of the control frame.

A base station apparatus for a radiocommunication network which establishes radio communication with one or more radio terminal apparatuses, said base station apparatus comprising:

• a load state detection section for detecting the state of load on a radiocommunication network during the course of exchange of data between said base station apparatus and said radio terminal apparatus;
• and
• a modification section which dynamically modifies the maximum length of a packet at the time of transmission of a frame in accordance with the state of load detected by said load state detection section.

A method of controlling communication across a radiocommunication network which comprises one or more radio terminal apparatuses and a base station apparatus that establishes radio communication with the radio terminal apparatuses, wherein

• said base station apparatus detects the state of load on a radiocommunication network during the course of exchange of data between said base station apparatus and said radio terminal apparatus, and dynamically changes the maximum back-off time for preventing collision between data in accordance with the thus-detected state of load.

A method of controlling communication across a radiocommunication network which comprises one or more radio terminal apparatuses, and a base station apparatus that establishes radio communication with the radio terminal apparatuses, wherein

• said base station apparatus detects the state of load on a radiocommunication network during the course of exchange of data between said base station apparatus and said radio terminal apparatus, determines, in accordance with the thus-detected state of load, whether to add a control frame to a frame of data to be transmitted in order to ensure the period during which a transmission path is occupied, and dynamically modifies the state of addition of the control frame.

A method of controlling communication across a radiocommunication network which comprises one or more radio terminal apparatuses and a base station apparatus that establishes radio communication with the radio terminal apparatuses, wherein

• said base station apparatus detects the state of load on a radiocommunication network during the course of exchange of data between said base station apparatus and said radio terminal apparatus, and dynamically modifies the maximum length of a packet at the time of transmission of a frame in accordance with the thus-detected state of load.