Method and device for transmitting channel state information

A method for receiving Channel State Information (CSI), comprising steps of:

• determining, by a base station, a first number of bits used for a joint encoding operation on a Beam Indicator (BI) and a Rank Indicator (RI), the BI being configured to indicate an index of a resource for transmitting a reference signal corresponding to the RI measured by a User Equipment (UE), an identical first number of bits being used for the joint encoding operation on RI(s) and the BI corresponding to all resources for transmitting the reference signal;
• and
• performing, by the base station, a joint decoding operation on encoding information from the UE in accordance with the first number of bits, to acquire the RI corresponding to the resource for transmitting the reference signal measured by the UE,
• wherein the step of determining, by the base station, the first number of bits used for the joint encoding operation on the BI and the RI comprises:
• determining, by the base station, numbers of bits for the RIs corresponding to all resources for transmitting the reference signal, determining, by the base station, a second number of bits for encoding the RI in accordance with a maximum value of the numbers of bits for the RIs corresponding to all resources for transmitting the reference signal, and determining, by the base station, the first number of bits in accordance with the second number of bits and a number of bits corresponding to the BI;
• or
• determining, by the base station, a total number of possible values of the RIs corresponding to all resources for transmitting the reference signal, and determining, by the base station, the first number of bits in accordance with the total number of the possible values of the RIs corresponding to all resources for transmitting the reference signal.

A User Equipment (UE), comprising:

• a processor;
• and
• a memory connected to the processor via a bus interface and configured to store therein programs and data for the operation of the processor, wherein
• the processor is configured to call and execute the programs and data stored in the memory to:
• determine a first number of bits used for a joint encoding operation on a Beam Indicator (BI) and a Rank Indicator (RI), the BI being configured to indicate an index of a resource for transmitting a reference signal corresponding to the RI measured by the UE, an identical first number of bits being used for the joint encoding operation on RI(s) and the BI corresponding to all resources for transmitting the reference signal;
• and
• perform the joint encoding operation on the RI and the BI in accordance with the first number of bits to acquire encoding information, and transmit the encoding information,
• wherein the processor is further configured to:
• determine numbers of bits for the RIs corresponding to all resources for transmitting the reference signal, determine a second number of bits for encoding the RI in accordance with a maximum value of the numbers of bits for the RIs corresponding to all resources for transmitting the reference signal, and determine the first number of bits in accordance with the second number of bits and a number of bits corresponding to the BI;
• or
• determine a total number of possible values of the RIs corresponding to all resources for transmitting the reference signal, and determine the first number of bits in accordance with the total number of the possible values of the RIs corresponding to all resources for transmitting the reference signal.

A network side device, comprising:

• a processor;
• and
• a memory connected to the processor via a bus interface and configured to store therein programs and data for the operation of the processor, wherein
• the processor is configured to call and execute the programs and data stored in the memory to:
• determine a first number of bits used for a joint encoding operation on a Beam Indicator (BI) and a Rank Indicator (RI), the BI being configured to indicate an index of a resource for transmitting a reference signal corresponding to the RI measured by a User Equipment (UE), an identical first number of bits being used for the joint encoding operation on RI(s) and the BI corresponding to all resources for transmitting the reference signal;
• and
• perform a joint decoding operation on encoding information from the UE in accordance with the first number of bits, to acquire the RI corresponding to the resource for transmitting the reference signal measured by the UE,
• wherein the processor is further configured to:
• determine numbers of bits for the RIs corresponding to all resources for transmitting the reference signal, determine a second number of bits for encoding the RI in accordance with a maximum value of the numbers of bits for the RIs corresponding to all resources for transmitting the reference signal, and determine the first number of bits in accordance with the second number of bits and a number of bits corresponding to the BI;
• or
• determine a total number of possible values of the RIs corresponding to all resources for transmitting the reference signal, and determine the first number of bits in accordance with the total number of the possible values of the RIs corresponding to all resources for transmitting the reference signal.