Method for adaptive packet transmission in a multibeam satellite communication system

The present invention, the various rates provided and the 3D of the transmission frame for a flexible radio resource allocated frequency slot / time slot / spreading code ever relates to an adaptive packet transmission method in a cellular mobile communication system using a multi-beam satellite in packet transmission is assigned to partition by using the radio resource allocation for packet transmission for each user other to minimize interference with the packet transmission according to the channel state, and allocate the appropriate transmission power, suitable according to user requirements and channel conditions it is possible to perform resource allocation within the limited time, the packet transmission method having different rates in order to efficiently utilize the limited radio resources is changed radio resource usable in accordance with the channel state, and to support both real-time services and non-real-time service group and the program for realizing the method Step 1 to provide to a recording medium readable by a computer, and its object is, reports the average received signal strength measurement for each pilot signal transmitted from a plurality of sector / beam close to the user terminal periodically; A second step of estimating the transmission path gain between a close-up on a sector / beam and the user terminal receives the average strength of the pilot signal; A third step of determining the priority of the packet transmission for each user; For the transmission of each packet is selected in accordance with the determined priorities in the third step of selecting a radio resource of the sector / beam and the transmission frame in which a minimum power requirement using the transmission path gain estimate for each user, and selected using the transmission path gain estimate for each user in the fourth step of assigning radio resources to the minimum power required to satisfy a particular packet reception quality; And using a lack of available radio resources and transmission power, or, if there is a packet to be assigned, and a fifth step which advances to the third step, or the like yiyongdoem multiple beam satellite communication system.