Method for transmitting sounding reference signal and method and device for indicating configuration

A method for transmitting a sounding reference signal comprising:

• receiving at least two pieces of DCI transmitted in a subframe by a radio access device, wherein each of the at least two pieces of DCI comprises a sounding reference signal SRS configuration information element;
• determining an SRS configuration indicated jointly by the SRS configuration information elements in the at least two pieces of DCI;
• and
• transmitting an SRS to the radio access device according to the determined SRS configuration,
• wherein the determining an SRS configuration indicated jointly by the SRS configuration information elements in the at least two pieces of DCI comprises:
• when an SRS configuration information element of only one piece of DCI in the at least two pieces of DCI indicates an SRS configuration, determining the SRS configuration indicated by the SRS configuration information element of the one piece of DCI as the SRS configuration jointly indicated by the SRS configuration information elements in the at least two pieces of DCI;
• when the SRS configuration information elements of the at least two pieces of DCI all indicate an SRS configuration, determining that the SRS configuration information elements in the at least two pieces of DCI jointly indicate an invalid SRS configuration.

A radio access device, comprising:

• a generating module, configured to generate at least two pieces of DCI, wherein each of the at least two pieces of DCI comprises a sounding reference signal SRS configuration information element;
• and
• a transmitting module, configured to transmit the at least two pieces of DCI in a subframe to a terminal, so that the SRS configuration information elements in the at least two pieces of DCI are used to jointly indicate an SRS configuration,
• wherein jointly indicating the SRS configuration comprises:
• when an SRS configuration information element of only one piece of DCI in the at least two pieces of DCI indicates the SRS configuration, using the SRS configuration indicated by the SRS configuration information element of the one piece of DCI as the SRS configuration jointly indicated by the SRS configuration information elements in the at least two pieces of DCI;
• and
• when the SRS configuration information elements of the at least two pieces of DCI all indicate the SRS configuration, the SRS configuration information elements in the at least two pieces of DCI jointly indicating an invalid SRS configuration.

A terminal device, comprising:

• a receiving module, configured to receive at least two pieces of DCI transmitted in a subframe by a radio access device, wherein each of the at least two pieces of DCI comprises a sounding reference signal SRS configuration information element;
• a determining module, configured to determine an SRS configuration indicated jointly by the SRS configuration information elements in the at least two pieces of DCI received by the receiving module;
• and
• a transmitting module, configured to transmit an SRS to the radio access device according to the SRS configuration determined by the determining module,
• wherein:
• the at least two pieces of DCI received by the receiving module have different indication priorities;
• the determining module comprises:
• a comparing submodule configured to compare the indication priorities of the at least two pieces of DCI received by the receiving module;
• and
• a determining submodule, configured to:
• determine according to the comparison by the comparing submodule, an SRS configuration indicated by an SRS configuration information element of DCI of a highest indication priority in the at least two nieces of DCI as the SRS configuration jointly indicated by the SRS configuration information elements in the at least two pieces of DCI;
• or when SRS configuration information elements of other DCI than DCI of a highest indication priority in the at least two pieces of DCI received by the receiving module are set to an invalid state, determine according to the comparison by the comparing submodule, an SRS configuration indicated by an SRS configuration information element of DCI of the highest indication priority in the at least two pieces of DCI as the SRS configuration jointly indicated by the SRS configuration information elements in the at least two pieces of DCI.