Patent ID: 9723607
Date: 2017-08-01
CPC Classifications: H04L,H04W

Claim:
1. A method for sending machine type communication (MTC) downlink data, comprising: configuring, by a base station, downlink transmission bandwidth for a user equipment (UE); determining, by the base station, an antenna port used for sending the MTC downlink data; determining, by the base station, a subcarrier reservation location in the downlink transmission bandwidth according to downlink transmission parameters, wherein the downlink transmission parameters comprise a quantity of resource blocks in the downlink transmission bandwidth, the antenna port, and at least one of the following: a cell-specific frequency shift value and a cyclic prefix (CP) type; and sending, by the base station, the MTC downlink data to the UE, so that the UE receives the MTC downlink data after setting a local oscillator frequency of a receiver according to the downlink transmission parameters, wherein a subcarrier located in the subcarrier reservation location does not carry any data signal or reference signal, wherein a central frequency of the subcarrier in the subcarrier reservation location is the same as the local oscillator frequency, set by the UE, of the receiver, wherein the quantity of resource blocks is an odd number, wherein the downlink transmission parameters further comprise the CP type, and wherein determining, by the base station, the subcarrier reservation location in the downlink transmission bandwidth according to the downlink transmission parameters comprises: