Wireless base station device, wireless communication system, and communication control method

A wireless base station device having the equal transmission right with a mobile terminal for controlling transmission/reception of data to/from the mobile terminal by, as a control system in a normal state, a communication control system based on a distributed control function which requires a first waiting time as a transmission interval of data frame which is a unit of data to be transmitted while, due to an increase in a traffic of wireless medium (traffic of communication quantity), controlling transmission/reception of data to/from the mobile terminal by a communication control system based on a centralized control function system through polling, which requires a second waiting time as a transmission interval of the data frame that is shorter than the first waiting time, through providing an effective time during which the function operates, wherein

• the communication control system is switched from the distributed control function to the centralized control function when the accumulated data rate, which is a proportion of uncompleted transmission number against data transmission request number calculated by the data transmission request number transmitted from the wireless base station device to the mobile terminal and the number of data which has been transmitted to the mobile terminal, is higher than a prescribed threshold value.

A wireless base station device having the equal transmission right with a mobile terminal for controlling transmission/reception of data to/from the mobile terminal by, as a control system in a normal state, a communication control system based on a distributed control function which requires a first waiting time as a transmission interval of data frame which is a unit of data to be transmitted while, due to an increase in a traffic of wireless medium (traffic of communication quantity), controlling transmission/reception of data to/from the mobile terminal by a communication control system based on a centralized control function system through polling, which requires a second waiting time as a transmission interval of the data frame that is shorter than the first waiting time, through providing an effective time during which the function operates, wherein

• the communication control system is switched from the distributed control function to the centralized control function when time corresponding to a frame interval is detected to be a prescribed threshold value or less by monitoring the time corresponding to the frame interval of data frame continuously present on the wireless medium.

A wireless base station device having the equal transmission right with a mobile terminal for controlling transmission/reception of data to/from the mobile terminal by, as a control system in a normal state, a communication control system based on a distributed control function which requires a first waiting time as a transmission interval of data frame which is a unit of data to be transmitted while, due to an increase in a traffic of wireless medium (traffic of communication quantity), controlling transmission/reception of data to/from the mobile terminal by a communication control system based on a centralized control function system through polling, which requires a second waiting time as a transmission interval of the data frame that is shorter than the first waiting time, through providing an effective time during which the function operates, wherein

• at the time of switching the communication control function from the distributed control function to the centralized control function due to an increase in traffic of a wireless medium, the total time required for performing transmission/reception of data to/from all the mobile terminals belonging to the wireless base station device is calculated and communication control is performed by polling having the calculated time as the effective time for centralized control function.

A wireless communication system comprising a mobile terminal and a wireless base station device performing transmission/reception of data to/from the mobile terminal via a wireless medium, wherein

• the wireless base station device has the equal transmission right with the mobile terminal and controls transmission/reception of data to/from the mobile terminal by, as a control system in a normal state, a communication control system based on a distributed control function which requires a first waiting time as a transmission interval of a data frame which is a unit of data to be transmitted, while controlling transmission/reception of data to/from the mobile terminal by a communication control system based on a centralized control function through polling which requires a second waiting time as a transmission interval of the data frame that is shorter than the first waiting time, through providing an effective time during which the function operates by detecting a traffic increase in the wireless medium when a state where the average data size of data frame transmitted/received to/from the mobile terminal exceeds a certain value continues for a prescribed time.

A wireless communication system comprising a mobile terminal and a wireless base station device performing transmission/reception of data to/from the mobile terminals via a wireless medium, wherein

• the wireless base station device has the equal transmission right with the mobile terminal and controls transmission/reception of data to/from the mobile terminal by, as a control system in a normal state, a communication control system based on a distributed control function which requires a first waiting time as a transmission interval of a data frame which is a unit of data to be transmitted, while controlling transmission/reception of data to/from the mobile terminal by a communication control system based on a centralized control function through polling which requires a second waiting time as a transmission interval of the data frame that is shorter than the first waiting time, through providing an effective time during which the function operates by detecting a traffic increase in the wireless medium when the accumulated data rate, which is a proportion of uncompleted transmission number against data transmission request number calculated by the data transmission request number transmitted from the wireless base station device to the mobile terminal and the number of data which has been transmitted to the mobile terminal, is higher than a prescribed threshold value.

A wireless communication system comprising a mobile terminal and a wireless base station device performing transmission/reception of data to/from the mobile terminals via a wireless medium, wherein

• the wireless base station device has the equal transmission right with the mobile terminal and controls transmission/reception of data to/from the mobile terminal by, as a control system in a normal state, a communication control system based on a distributed control function which requires a first waiting time as a transmission interval of a data frame which is a unit of data to be transmitted, while controlling transmission/reception of data to/from the mobile terminal by a communication control system based on a centralized control function through polling which requires a second waiting time as a transmission interval of the data frame that is shorter than the first waiting time, through providing an effective time during which the function operates by detecting a traffic increase in the wireless medium when time corresponding to a frame interval is detected to be a prescribed threshold value or less by monitoring the time corresponding to the frame interval of data frame continuously present on the wireless medium.

A communication control method used in a wireless base station device having the equal transmission right with a mobile terminal for controlling transmission/reception of data to/from the mobile terminal by, as a control system in a normal state, a communication control system based on a distributed control function which requires a first waiting time as a transmission interval of data frame which is a unit of data to be transmitted while, due to an increase in a traffic of wireless medium, controlling transmission/reception of data to/from the mobile terminal by a communication control system based on a centralized control function system through polling, which requires a second waiting time as a transmission interval of the data frame that is shorter than the first waiting time, through providing an effective time during which the function operates, comprising the step of:

• switching the communication control system from the distributed control function to the centralized control function when a state where the average data size of data frame transmitted/received to/from the mobile terminal exceeds a constant value continues for a prescribed time.

A communication control method used in a wireless base station device having the equal transmission right with a mobile terminal for controlling transmission/reception of data to/from the mobile terminal by, as a control system in a normal state, a communication control system based on a distributed control function which requires a first waiting time as a transmission interval of data frame which is a unit of data to be transmitted while, due to an increase in a traffic of wireless medium, controlling transmission/reception of data to/from the mobile terminal by a communication control system based on a centralized control function system through polling, which requires a second waiting time as a transmission interval of the data frame shorter than the first waiting time, through providing an effective time during which the function operates, comprising the step of:

• switching the communication control system from the distributed control function to the centralized control function when the accumulated data rate, which is a proportion of uncompleted transmission number against data transmission request number calculated by the data transmission request number transmitted from the wireless base station device to the mobile terminal and the number of data which has been transmitted to the mobile terminal, is higher than a prescribed threshold value.

A communication control method used in a wireless base station device having the equal transmission right with a mobile terminal for controlling transmission/reception of data to/from the mobile terminal by, as a control system in a normal state, a communication control system based on a distributed control function which requires a first waiting time as a transmission interval of data frame which is a unit of data to be transmitted while, due to an increase in a traffic of wireless medium, controlling transmission/reception of data to/from the mobile terminal by a communication control system based on a centralized control function system through polling, which requires a second waiting time as a transmission interval of the data frame that is shorter than the first waiting time, through providing an effective time during which the function operates, comprising the step of:

• switching the communication control system from the distributed control function to the centralized control function when time corresponding to a frame interval is detected to be a prescribed threshold value or less by monitoring the time corresponding to the frame interval of data frame continuously present on the wireless medium.

A communication control method used in a wireless base station device having the equal transmission right with a mobile terminal for controlling transmission/reception of data to/from the mobile terminal by, as a control system in a normal state, a communication control system based on a distributed control function which requires a first waiting time as a transmission interval of data frame which is a unit of data to be transmitted while, due to an increase in a traffic of wireless medium, controlling transmission/reception of data to/from the mobile terminal by a communication control system based on a centralized control function system through polling, which requires a second waiting time as a transmission interval of the data frame that is shorter than the first waiting time, through providing an effective time during which the function operates, comprising the step of:

• calculating the total time required for performing transmission/reception of data to/from all the mobile terminals belonging to the wireless base station device for performing communication control by polling having the calculated time as the effective time for centralized control function when switching the communication control function from the distributed control function to the centralized control function due to an increase in a traffic of a wireless medium.