of the mobile station's for Buffer Management available HARQ soft buffer (The MS reports its buffering capability by stating the steady amount of information bits in 4800 byte units it can receive). Buffer overflow is a condition where the receiving buffer is full and the soft bits of a failed (re) transmission can no longer be stored. Upon buffer overflow condition, the MS informs the BS using this EDI. This EDI is transmitted in the mobile station's first fast feedback opportunity. Even upon buffer overflow condition, the MS will still attempt to receive DL HARQ bursts and to send HARQ feedback to the BS. Upon reception of overflow EDI from the MS, the BS may assume that all soft bits of bursts in the last transmission that the MS failed to receive were not buffered. Consequently, to ensure that the systematic bits are used for decoding by the MS, the BS may retransmit SPID 0 for the failed bursts that were transmitted once. The BS may take into consideration the HARQ feedbacks from the MS for different retransmissions when selecting the amount of information bits, the SPID, or the MCS of the bursts. decrement values of -1, 0, +1, or +2. The CQI of sub-band m in the first short-term report following a long-term report is calculated as Sub-band m CQI Index = Sub-band Average CQI Index + Sub-band m Differential CQI where Sub-band Average CQI Index is an average measure of the CQI over the reported sub-bands. The reported differential CQI from the MS must generate a value of Sub-band m CQI Index in the range of 0 to 15. The wideband PMI, sub-band PMI, and base PMI are encoded with 3, 4, or 6 bits according to the codebook size. 10.3 Uplink control channels Table 10-17 Secondary Fast Feedback Channel Parameters [2] Related MIMO Parameter Feedback Mode Usage Sub-band CQI 2, 3, 5, 6 This parameter is used to report the average and differential CQI of selected sub-bands. Sub-band Index 2, 3, 5, 6 This parameter is used to identify the selected sub-bands Sub-band PMI Precoding Matrix Indicator of one sub-band for close