Transmission method and system of downlink control information

[0102] Embodiment 1, indicating that Format 1A only corresponds to the transmission mode of transmit diversity

[0103] In this embodiment, in the UE specific search space defined by Common and C-RNTI, when the cyclic check code in the downlink control channel is scrambled with the wireless network temporary identifier of the semi-persistently scheduled cell, for example, the UE is set to use When the CRC scrambled by the SPS C-RNTI is used to decode the PDCCH, the DCI Format 1A can be used to indicate the transmission mode of the transmit diversity. As shown in Table 4:

[0104] UE downlink transmission mode

[0105] Table 4

[0106] Embodiment 2: Indicates that Format 1A only corresponds to a single antenna port transmission mode, and the antenna port is fixed

[0107] In this embodiment, in the UE specific search space defined by Common and C-RNTI, when the cyclic check code in the downlink control channel is scrambled with the wireless network temporary identifier of the semi-persistently scheduled cell, for example, the UE is set to use When the CRC scrambled by the SPS C-RNTI is used to decode the PDCCH, DCI Format 1A can be used to indicate the transmission mode of single-layer transmission. The single-layer transmission here refers to the transmission mode of a single antenna port, and the corresponding antenna port has the following configurations:

[0108] Configuration 1: The single-antenna port corresponding to DCI Format 1A is fixed as port 5, and its configuration in mode X is shown in Table 5:

[0109] UE downlink transmission mode

[0110] table 5

[0111] Configuration 2:...

[0117] Embodiment 3: Indicates that Format 1A only corresponds to a single-antenna port transmission mode, and the antenna port signaling indicates

[0118]In this embodiment, in the UE specific search space defined by Common and C-RNTI, when the cyclic check code in the downlink control channel is scrambled with the wireless network temporary identifier of the semi-persistently scheduled cell, for example, the UE is set to use When the CRC scrambled by the SPS C-RNTI is used to decode the PDCCH, DCI Format 1A can be used to indicate the transmission mode of single-layer transmission. The single-layer transmission here refers to a single-antenna port transmission mode, and the corresponding antenna port is port M or port N.

[0119] When the UE is set by the high layer to use the CRC scrambled by SPS C-RNTI to decode the PDCCH, and the semi-persistent scheduling is activated, the HARQ Process Number (ID) signaling bit, NDI signaling bit, and RV in DCI Format 1A The signaling ...