Device in distributed wireless personal area network and data slot allocation method

A data slot allocation method for a device in a distributed wireless personal area network (WPAN), the method comprising:

• receiving from neighbor devices at least one of a data stream index, a number of required data slots, and a number of desired data slots;
• determining whether there is a first device among the neighbor devices, the first device transmitting a stream with allocated data slots less than the number of the required data slots;
• and
• calculating a number of data slots to be allocated from a next superframe that fall below a number of data slots allocated from a current superframe when the first device is determined to exist.

A device operating in a distributed wireless personal area network (WPAN), comprising:

• a communication section which receives from neighbor devices quality of service (QoS) information that contains at least one of a data stream index, a number of required data slots, and a number of desired data slots;
• a determination section which determines whether there is a first device among the neighbor devices, the first device allocated data slots less than the number of required data slots;
• and
• a controller which calculates a number of data slots to be allocated from a next superframe that fall below a number of data slots allocated from a current superframe when the first device is determined.