Reference signal transmission method and apparatus

An apparatus, comprising:

• a transmitter, configured to:
• send reference signal resource configuration information to a user apparatus, wherein the reference signal resource configuration information comprises antenna port quantity information and a resource configuration index, and the resource configuration index indicates a first reference signal configuration in a reference signal configuration set, wherein the first reference signal configuration indicates position information of resource elements (REs) to use to send reference signals on antenna ports in a first antenna port set, wherein the antenna ports in the first antenna port set are sequentially numbered from x to x+N−1, wherein N is equal to an antenna quantity indicated by the antenna port quantity information, and x is a start number of the antenna ports in the first antenna port set, wherein the first antenna port set comprises at least two antenna port subsets, wherein a respective resource element group (REG) used by each antenna port subset consists of four REs that are adjacent in frequency domain and in time domain, and reference signals sent on different antenna ports in each antenna port subset are code division multiplexed over the respective REG corresponding to the respective antenna port subset;
• and
• send the reference signals to the user apparatus at positions indicated by the position information of the REs to use to send the reference signals on the antenna ports in the first antenna port set.

A non-transitory computer-readable storage medium comprising instructions which, when executed by a computer, cause the computer to:

• send reference signal resource configuration information to a user apparatus, wherein the reference signal resource configuration information comprises antenna port quantity information and a resource configuration index, and the resource configuration index indicates a first reference signal configuration in a reference signal configuration set, wherein the first reference signal configuration indicates position information of resource elements (REs) to use to send reference signals on antenna ports in a first antenna port set, wherein the antenna ports in the first antenna port set are sequentially numbered from x to x+N−1, wherein N is equal to an antenna quantity indicated by the antenna port quantity information, and x is a start number of the antenna ports in the first antenna port set, wherein the first antenna port set comprises at least two antenna port subsets, wherein a respective resource element group (REG) used by each antenna port subset consists of four REs that are adjacent in frequency domain and in time domain, and reference signals sent on different antenna ports in each antenna port subset are code division multiplexed over the respective REG;
• and
• send the reference signals according to the first reference signal configuration.

A non-transitory computer-readable storage medium comprising instructions which, when executed by a computer, cause the computer to carry out steps of:

• receiving reference signal resource configuration information from a base station, wherein the reference signal resource configuration information comprises antenna port quantity information and a resource configuration index;
• determining a first reference signal configuration from a reference signal configuration set according to the resource configuration index, wherein the first reference signal configuration indicates position information of resource elements (REs) that are used to send reference signals on antenna ports in a first antenna port set, wherein the antenna ports in the first antenna port set are sequentially numbered from x to x+N-1,wherein N is equal to an antenna port quantity indicated by the antenna port quantity information, and x is a start number of the antenna ports in the first antenna port set, wherein the first antenna port set comprises at least two antenna port subsets, wherein a resource element group used by each antenna port subset consists of four adjacent REs in the frequency domain and in the time domain, and reference signals on different antenna ports in each antenna port subset are code division multiplexed over the resource element group;
• and
• receiving the reference signals according to the first reference signal configuration.