A method of configuring downlink control information in a base station (BASE STATION), the downlink control information indicating demodulation reference signal configuration information under demodulation reference signal enhancement, and the base station being configured with a demodulation reference signal configuration information set, the method comprising: sending the downlink control information to user equipment, the downlink control information including a demodulation reference signal configuration index that indicates the demodulation reference signal configuration information, the demodulation reference signal configuration information including an item in the demodulation reference signal configuration information set, in the case of using one codebook, the demodulation reference signal configuration information set including a first combination set of one layer, the antenna port 11 or 13, and a scrambling sequence number; in the case of using two codebooks, the demodulation reference signal configuration information set including a second combination set of two, three, or four layers, at least one of the antenna ports 7, 8, 11, and 13, and a scrambling sequence number, wherein in the case of using one codebook, the demodulation reference signal configuration information set further includes: one layer, the antenna port 7', and a first scrambling sequence number, one layer, the antenna port 7', and a second scrambling sequence number, one layer, the antenna port 8', and a first scrambling sequence number, and one layer, the antenna port 8', and a second scrambling sequence number; wherein in the case that two codebooks are used, the demodulation reference signal configuration information set further includes: two layers, the antenna ports 7' and 8', and a first scrambling sequence number, and two layers, the antenna ports 7' and 8', and a second scrambling sequence number; and wherein the location of the antenna port 7' is the same as the location of the antenna port 7, the location of the antenna port 8' is the same as the location of the antenna port 8, and the antenna port 7' and the antenna port 8' indicate the user equipment to use an orthogonal cover code with the length of four to perform channel estimation, respectively. sending the downlink control information to user equipment, the downlink control information including a demodulation reference signal configuration index that indicates the demodulation reference signal configuration information, the demodulation reference signal configuration information including an item in the demodulation reference signal configuration information set, in the case of using one codebook, the demodulation reference signal configuration information set including a first combination set of one layer, the antenna port 11 or 13, and a scrambling sequence number; in the case of using two codebooks, the demodulation reference signal configuration information set including a second combination set of two, three, or four layers, at least one of the antenna ports 7, 8, 11, and 13, and a scrambling sequence number, wherein in the case of using one codebook, the demodulation reference signal configuration information set further includes: one layer, the antenna port 7', and a first scrambling sequence number, one layer, the antenna port 7', and a second scrambling sequence number, one layer, the antenna port 8', and a first scrambling sequence number, and one layer, the antenna port 8', and a second scrambling sequence number; one layer, the antenna port 7', and a first scrambling sequence number, one layer, the antenna port 7', and a second scrambling sequence number, one layer, the antenna port 8', and a first scrambling sequence number, and one layer, the antenna port 8', and a second scrambling sequence number; wherein in the case that two codebooks are used, the demodulation reference signal configuration information set further includes: two layers, the antenna ports 7' and 8', and a first scrambling sequence number, and two layers, the antenna ports 7' and 8', and a second scrambling sequence number; and two layers, the antenna ports 7' and 8', and a first scrambling sequence number, and two layers, the antenna ports 7' and 8', and a second scrambling sequence number; and wherein the location of the antenna port 7' is the same as the location of the antenna port 7, the location of the antenna port 8' is the same as the location of the antenna port 8, and the antenna port 7' and the antenna port 8' indicate the user equipment to use an orthogonal cover code with the length of four to perform channel estimation, respectively.