| 摘要 |
PURPOSE:To reduce the amount of data to be stored in a mobile station without increasing a traffic rate by attaching an already received block number on data request information from a base station, and informing a data transmission result to a mobile station side. CONSTITUTION:Inquiry data 4 of block numbers 1-5 are transmitted from the base station 1 to the mobile station 2. The mobile station returns data answers 6 of block numbers 1-5 for the inquiry from the base station, and also, stores 7 the answers of block numbers 1-5 in the inside of the mobile station. At this time, when only the answers of block numbers 1 and 3-5 are received by the base station 1, the base station 1 requests data of fourth block. At that time, information 8 representing the already received block number is attached. Thereby, the mobile station 2 returns the block number 4, and also, deletes another block. Therefore, it is possible to reduce the storage quantity of the data in the mobile station without increasing the traffic rate. |
