A study on a method to transmit compressed image files using paging network

We propose a method to transmit compresses image files for wireless multimedia services based on FLEX. In a conventional paging system, traffic congestion and delay are serious problems in transmitting large binary files. To overcome these problems, we propose to use a JPEG optimizer to reduce the file size within 4 kbytes and divide a file into a number of small size files. In addition, we assign 4 reserved bits in the header of the message codeword as the divided file number which are used for reassembling divided files into the original binary file. We verify the quality of the transmitted image files by simulation. The results tell us that the proposed method can be operated well under the required BER=10/sup -3/ which is the typical value for wireless communication services.