METHOD AND DEVICE FOR TRANSCEIVING QUALITY INFORMATION OF FORWARD CHANNEL IN MOBILE COMMUNICATION SYSTEM

摘要

PURPOSE: A method and a device for transceiving quality information of a forward channel in a mobile communication system are provided to transmit an absolute symbol in one pre-decided slot, and to transmit a relative symbol in residual slots, so as to reduce overhead and interference occurring in a reverse link and increase reverse traffic capacity. CONSTITUTION: A terminal measures a C/I(Carrier-to-Interference ratio) of a forward common pilot channel in a current slot(400). The measured C/I is stored(410). If the current slot is an absolute transmission slot(420), the terminal generates an absolute symbol indicating a level of the measured C/I(430). If the current slot is a relative transmission slot(420), the terminal compares a C/I of a previous slot with the C/I of the current slot(450). If the C/I of the current slot is larger, the terminal generates a relative symbol indicating the increase of C/I(470). If the C/I of the current slot is equal to the C/I of the previous slot, the terminal generates a relative symbol indicating the identical C/I(480). If the C/I of the current slot is smaller, the terminal generates a relative symbol indicating the reduction of C/I(490). And a CQI(Channel Quality Indicator) symbol generated in one step of the steps 430, 470, 480 and 490 is transmitted through a CQICH(Channel Quality Indicator Channel)(440).