Patent ID: 8472882
Filing Date: 2013-06-25
Classification: H04L,H04W

Abstract:
1. A channel quality information reporting method of reporting channel quality information from user equipment to a base station, the method comprising: a format determination step in which the base station determines a channel quality information format based on information of the user equipment; a format transmission step in which the base station transmits the determined channel quality information format to the user equipment; a channel quality information generation step in which the user equipment generates the channel quality information based on the received channel quality information format, the channel quality information format including at least one of a CQI report cycle, a CQI transmission time interval, and a number of bits to be transmitted in one sub-frame; and a receiving step in which the base station receives a required data rate from the user equipment upon being connected to the user equipment; wherein, in the format determination step, the higher the required data rate is, the larger the number of bits to be transmitted in one sub-frame becomes, the longer the CQI transmission time interval becomes, and the shorter the CQI report cycle becomes; and wherein, in the channel quality information generation step, when channel quality information in a frequency direction or in a space direction is to be generated, the channel quality information including an absolute value representing channel quality information as a reference and a difference value from the absolute value are generated, and when channel quality information in a time direction is to be generated, the channel quality information including a value measured or calculated in the CQI transmission time interval is generated.