Information transmission method and device
A technology of information transmission and indication information, applied in the field of communication, to achieve the effect of improving the scope of application
- Application Information
AI Technical Summary
Problems solved by technology
 This embodiment describes a method for sending downlink information of a UE with a small bandwidth on the base station side. Figure 8 It is a schematic diagram of the downlink information transmission process at the base station side according to Embodiment 1 of the present invention, as shown in Figure 8 As shown, the process includes the following steps:
 Step S802, when the base station (for example, eNodeB) transmits the downlink physical channel of the UE, the downlink information of the UE is mapped to the corresponding time-frequency domain position within the predefined bandwidth of the subframe configured by the UE;
 Preferably, the UE may include an MTC UE, for example, may be a low-cost MTC UE with limited bandwidth.
 Preferably, the system bandwidth supported by the UE is predefined to be 1.4MHz, 3MHz or 5MHz;
 Preferably, when the eNodeB transmits the UE's downlink physical channel, it first judges whether the system band...
 This embodiment describes the specific process of the method for receiving small-bandwidth downlink information from the UE side, Figure 9 It is a schematic diagram of the receiving process of the MTC terminal side downlink information according to Embodiment 2 of the present invention, as Figure 9 As shown, the process includes the following steps:
 Step S902, the UE judges whether the system bandwidth is greater than its own predefined bandwidth, if yes, execute step S904, otherwise execute step S906;
 Preferably, the UE judges by receiving system bandwidth information carried by the PBCH on subframe 0.
 In step S904, the UE receives downlink physical channels within the entire system bandwidth according to related technologies.
Here, it is assumed that the predefined bandwidth of the UE is smaller than the system bandwidth;
 Preferably, the UE may include an MTC UE, and the predefined supported system bandwidth of the UE i...
application example 1
 This application example describes the case of subframe 0 in the FDD system. This subframe may or may not contain MTC UE-specific downlink control and service information. This configuration information is notified to the UE through pre-definition or signaling. Here, the M-PDSCH channel including only the MTC UE is taken as an example for illustration.
 Figure 10 is a schematic diagram of the downlink subframe time-frequency structure according to Application Example 1 of the present invention. At this time, the channel structure of subframe 0 is as follows Figure 10 As shown, assuming that the system bandwidth is 10MHz:
 The frequency domain resources of the M-PDSCH channel of the MTC UE are the middle 6 PRBs of the system bandwidth, and the time domain resources are the remaining OFDM symbols starting from the fourth OFDM symbol except PBCH, SSS, and PSS.
 At this time, for the M-PDSCH, the PDCCH or ePDCCH of the MTC UE in other subframes c...
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