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

1. 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, when the user equipment desynchronizes or the user equipment fails to transmit a scheduling request to the base station;

initiating by the user equipment a random access procedure; 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 a base station for the user equipment according to an indication information issued by the base station for indicating the user equipment to transmit an aperiodic sounding reference symbol if the random access succeeds.

2. 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 a type of 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.

3. The method according to claim 2 , wherein the indication information contained in the random access response message is borne by a reserved bit or a newly added bit in the random access response message.

4. The method according to claim 2 , wherein the 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 comprises:

receiving by the user equipment the random access response message transmitted by the base station;

processing the random access response message according to a preconfigured format of the random access response message so as to obtain the indication information contained in the random access response message; and

determining by the user equipment to transmit the aperiodic sounding reference symbol if the type of the indication information is the indication information for transmitting the aperiodic sounding reference symbol.

5. The method according to claim 2 , wherein the 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 comprises:

receiving by the user equipment the random access response message transmitted by the base station;

processing the random access response message by the user equipment according to a preconfigured format of the random access response message corresponding to a contention-free random access procedure so as to obtain the indication information contained in the random access response message if the type of the random access is a contention-free random access procedure; and

determining by the user equipment to transmit the aperiodic sounding reference symbol if the type of the indication information is the indication information for transmitting the aperiodic sounding reference symbol.

6. The method according to claim 2 , wherein the method further comprises:

receiving the resource used for transmitting an aperiodic sounding reference symbol configured by the base station for the user equipment; or

receiving the format of the random access response message configured by the base station for the user equipment; or

receiving the format of the random access response message corresponding to the type of the random access configured by the base station for the user equipment.

7. 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 a type of the indication information contained in the random access response message and transmits the aperiodic sounding reference symbol on an 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.

8. The method according to claim 7 , wherein the indication information contained in the random access response message is borne by a reserved bit or a newly added bit in the random access response message.

9. The method according to claim 7 , wherein the method further comprises:

configuring, by the base station for the user equipment, resource information used for transmitting the aperiodic sounding reference symbol; and

notifying the user equipment of the configured resource information via wireless resource control signaling.

10. The method according to claim 9 , wherein the wireless resource control signaling is wireless resource control connection establishing signaling, or wireless resource control connection reconfiguring signaling, or wireless resource control connection reestablishing signaling.

11. The method according to claim 7 , wherein the method further comprises:

configuring by the base station for the user equipment the format of the random access response message; and

notifying the user equipment of the configured format of the random access response message such that the user equipment processes the received random access response message according to the configured format of the random access response message.

12. The method according to claim 7 , wherein the method further comprises:

configuring by the base station for the user equipment the format of the random access response message corresponding to the type of the random access; and

notifying the user equipment of the configured format of the random access response message corresponding to the type of the random access such that the user equipment processes the received random access response message according to the format of the random access response message corresponding to the type of the random access.

13. A user equipment, comprising:

a first 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 first random access unit to execute a random access procedure to the base station; and

a first 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 according to an indication information issued by the base station for indicating the user equipment to transmit an aperiodic sounding reference symbol when the random access succeeds.

14. 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 a type of 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.

15. 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 and transmits the aperiodic sounding reference symbol on an 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.