TRANSMISSION METHOD AND TRANSMISSION SYSTEM FOR DOWNLINK CONTROL INFORMATION

摘要

A transmission method and a transmission system for downlink control information are provided by the present invention, which are used for solving the technical problem that how to indicate the transmission mode when the Cyclic Redundancy Check (CRC) code in the downlink control channel is scrambled by Semi-persistently Scheduled (SPS) Cell Radio Network Temporary Identifier (C-RNTI). In order to support the dual-layer beamforming technique in a Long Term Evolution Advanced (LTE-A) system, R9, a downlink control information format DCI Format 1A is provided by the present invention. Said Format 1A may indicate a transmission method for downlink control information, such as signal-layer transmission, transmit diversity, or the transmission mode involving both the signal-layer transmission and transmit diversity, when the CRC code in the downlink control channel is scrambled by Semi-persistently Scheduled C-RNTI. The present invention may ensure the flexibility for the system scheduling without increasing the system signaling overhead, and make the system supporting LTE-A R9 have favorable compatibility with LTE R8.