Data Communication Method, Terminal, and Base Station

A data communication method, comprising:

• receiving, by a terminal, a master information block, wherein the master information block comprises a first information which indicates a first lowest subcarrier of a lowest physical resource block of a control channel for scheduling system information block;
• determining, by the terminal, a first physical resource block index based on the first lowest subcarrier;
• receiving, by the terminal, a first demodulation reference signal based on the first physical resource block index, wherein the first demodulation reference signal is used to demodulate a downlink control channel for scheduling common information;
• receiving, by the terminal, the system information block or radio resource control signaling, wherein the system information block or the radio resource control signaling comprises a second information which indicates a second lowest subcarrier of a physical resource block;
• determining, by the terminal, a second physical resource block index based on the second lowest subcarrier;
• and
• receiving, by the terminal, a second demodulation reference signal based on the second physical resource block index, wherein the second demodulation reference signal is used to demodulate a downlink control channel for scheduling terminal-specific information.

An apparatus, comprising a processor and a memory, wherein

• the memory is configured to store a program;
• and
• the processor is configured to execute the program stored in the memory, to carry out the method of:
• receiving a master information block, wherein the master information block comprises a first information which indicates a first lowest subcarrier of a lowest physical resource block of a sub-band on which system information block is located;
• determining a first physical resource block index based on the first lowest subcarrier;
• receiving a first demodulation reference signal based on the first physical resource block index, wherein the first demodulation reference signal is used to demodulate a first data channel on which the system information block is located;
• receiving the system information block or radio resource control signaling, wherein the system information block or the radio resource control signaling comprises a second information which indicates a second lowest subcarrier of a physical resource block;
• determining a second physical resource block index based on the second lowest subcarrier;
• and
• sending and/or receiving a second demodulation reference signal based on the second physical resource block index, wherein the second demodulation reference signal is used to demodulate a second data channel.

An apparatus, comprising a processor and a memory, wherein

• the memory is configured to store a program;
• and
• the processor is configured to execute the program stored in the memory, to carry out the method of:
• receiving a master information block, wherein the master information block comprises a first information which indicates a first lowest subcarrier of a lowest physical resource block of a control channel for scheduling system information block;
• determining a first physical resource block index based on the first lowest subcarrier;
• receiving a first demodulation reference signal based on the first physical resource block index, wherein the first demodulation reference signal is used to demodulate a downlink control channel for scheduling common information;
• receiving the system information block or radio resource control signaling, wherein the system information block or the radio resource control signaling comprises a second information which indicates a second lowest subcarrier of a physical resource block;
• determining a second physical resource block index based on the second lowest subcarrier;
• and
• receiving a second demodulation reference signal based on the second physical resource block index, wherein the second demodulation reference signal is used to demodulate a downlink control channel for scheduling terminal-specific information.