Method for triggering aperiodic sounding reference symbol, base station and user equipment

A method for triggering an aperiodic sounding reference symbol, comprising:

• not releasing by user equipment a resource used for transmitting an aperiodic sounding reference symbol configured by a base station for the user equipment, if the user equipment desynchronizes or the user equipment fails to transmit a scheduling request to the base station;
• executing a random access procedure by the user equipment;
• determining by the user equipment whether to transmit an aperiodic sounding reference symbol according to the type of the indication information contained in a random access response message transmitted by the base station indicating the user equipment whether to transmit an aperiodic sounding reference symbol;
• and
• transmitting by the user equipment the aperiodic sounding reference symbol on the unreleased resource used for transmitting an aperiodic sounding reference symbol configured by the base station for the user equipment if the user equipment determines to transmit the aperiodic sounding reference symbol.

A method for triggering an aperiodic sounding reference symbol, comprising:

• receiving by a base station a random access preamble transmitted by user equipment;
• generating a corresponding random access response message according to a preconfigured format of the random access response message or according to the preconfigured format of the random access response message corresponding to the type of the random access, wherein indication information indicating whether the user equipment to transmit an aperiodic sounding reference symbol is contained in the random access response message;
• and
• transmitting to the user equipment the random access response message such that the user equipment determines whether to transmit an aperiodic sounding reference symbol according to the type of the indication information contained in the random access response message.

A user equipment, comprising:

• a second resource processing unit not to release a resource used for transmitting an aperiodic sounding reference symbol configured by a base station for the user equipment when the user equipment desynchronizes or the user equipment fails to transmit a scheduling request to the base station;
• a second random access unit to execute a random access procedure to the base station;
• a first determining unit to determine whether to transmit an aperiodic sounding reference symbol according to the type of the indication information contained in a random access response message transmitted by the base station indicating the user equipment whether to transmit an aperiodic sounding reference symbol;
• and
• a second information transmitting unit to transmit the aperiodic sounding reference symbol on the unreleased resource used for transmitting an aperiodic sounding reference symbol configured by the base station for the user equipment when the user equipment determines to transmit the aperiodic sounding reference symbol.

A base station, comprising:

• a third receiving unit to receive a random access preamble transmitted by an user equipment;
• a message generating unit to generate a corresponding random access response message according to a preconfigured format of the random access response message or according to the preconfigured format of the random access response message corresponding to the type of the random access, wherein indication information indicating whether the user equipment to transmit an aperiodic sounding reference symbol is contained in the random access response message;
• and
• a third information transmitting unit to transmit to the user equipment the random access response message such that the user equipment determines whether to transmit an aperiodic sounding reference symbol according to the type of the indication information contained in the random access response message.