Abstract: A system and a method for controlling transport rate of real time streaming service between a streaming server and a streaming client connected via a predetermined network are disclosed. In transmitting multimedia contents to the streaming client, the streaming server controls the transport rate by compensating as much as accumulatively added average value a difference between a buffer level reported from the streaming client and a required buffer level. Furthermore, in order to prevent an initial reproduction delay, the streaming server controls by a maximum transport rate allowed by the network. By which, an overflow or an under-run of buffer occurring when streaming service is given for a long time can be prevented, and a time delay can be minimized from a time of streaming start point to a time of reproduction in actual screen or sound.

Abstract: A time resource allocation method of ultra wideband (UWB) communication system is disclosed wherein transmission power is adjusted in a UWB communication system to appropriately allocate time resources of data transmission period. The present invention is such that determination is made as to whether there are time resources for allocation to a second UWB communication device if the second UWB communication device requests allocation of time resources while a plurality of first UWB communication devices are allocated with time resources of data transmission period. As a result of the determination, if time resources are lacking for allocation to the second UWB communication device, the first UWB communication device and the second UWB communication device measure a distance therebetween, and a wireless network region is divided by the measured distance and adjusted transmission power to enable to allocate time resource to the second UWB communication device.