Methods, apparatuses, user equipment and base stations for sending and receiving system information

1. A method of receiving system information (SI), comprising:

in response to receiving first class SI broadcasted by a base station, determining a receiving window and a preamble associated with to-be-requested SI, wherein the to-be-requested SI belongs to second class SI;

in response to arrival of the receiving window associated with the to-be-requested SI, sending the preamble in an uplink subframe configured for sending the preamble; and

receiving the to-be-requested SI within the receiving window associated with the to-be-requested SI, wherein the to-be-requested SI is sent by the base station according to the receiving window.

2. The method of claim 1 , wherein determining the receiving window associated with the to-be-requested SI comprises:

obtaining a scheduling list of the second class SI according to the first class SI, wherein the scheduling list is configured to record a receiving window length and a scheduling periodicity of the second class SI; and

determining the receiving window associated with the to-be-requested SI according to the receiving window length and the scheduling periodicity recorded in the scheduling list.

3. The method of claim 2 , wherein determining the receiving window associated with the to-be-requested SI according to the receiving window length and the scheduling periodicity recorded in the scheduling list comprises:

obtaining a starting frame of the receiving window associated with the to-be-requested SI according to an appearance order of the to-be-requested SI in the scheduling list, the scheduling periodicity of the to-be-requested SI, and the receiving window length associated with each of the second class SI;

obtaining a starting subframe of the receiving window associated with the to-be-requested SI according to the appearance order of the to-be-requested SI in the scheduling list and the receiving window length associated with each of the second class SI; and

determining consecutive M subframes from the starting subframe as the receiving window associated with the to-be-requested SI, wherein M refers to a length of the receiving window associated with the to-be-requested SI.

4. The method of claim 1 , further comprising:

obtaining a time-frequency resource configured for sending the preamble according to the first class SI;

determining a first uplink subframe configured for sending the preamble according to the time-frequency resource; and

performing an operation of sending the preamble in the uplink subframe configured for sending the preamble according to the first uplink subframe.

5. The method of claim 1 , further comprising:

determining a first uplink subframe configured for sending the preamble according to a system preset Lime-frequency resource; and

performing an operation of sending the preamble in the uplink subframe configured for sending the preamble according to the first uplink subframe.

6. The method of claim 1 , wherein receiving the to-be-requested SI within the receiving window associated with the to-be-requested SI comprises:

determining whether the to-be-requested SI is sent on a physical downlink shared channel according to an SI scheduling instruction; and

when the to-be-requested SI is sent on the physical downlink shared channel, receiving the to-be-requested SI on the physical downlink shared channel within the receiving window associated with the to-be-requested SI.

7. The method of claim 1 , wherein determining the preamble associated with the to-be-requested SI comprises at least one of:

determining the preamble associated with the second class SI according to the first class SI; or

determining the preamble associated with the second class SI according to a system preset preamble.

8. The method of claim 1 , wherein

all of the second class SI associates with one preamble; or

each of the second class SI associates with a different preamble.

9. A method of sending system information (SI), comprising:

sending first class SI which carries scheduling information of second class SI so that user equipment is enabled to determine a receiving window associated with target second class SI to be requested by the user equipment;

in response to receiving a preamble sent by the user equipment, determining the target second class SI and a receiving window associated with the target second class SI; and

after the preamble is received, sending the target second class SI within the receiving window associated with the target second class SI.

10. The method of claim 9 , wherein sending the target second class SI within the receiving window associated with the target second class SI comprises:

sending the target second class SI N times within the receiving window associated with the target second class SI, wherein N refers to a natural number not less than 1.

11. The method of claim 9 , wherein sending the target second class SI within the receiving window associated with the target second class SI comprises:

sending the target second class SI corresponding to the preamble on a physical downlink shared channel according to an SI scheduling instruction; and

sending the target second class SI within the receiving window associated with the target second class SI.

12. The method of claim 9 , further comprising:

for each second class SI, determining scheduling information which comprises a receiving window length and a scheduling periodicity;

adding the scheduling information of the second class SI to a scheduling list in an order, wherein the user equipment is caused to calculate a corresponding receiving window associated with the second class SI according to the order; and

generating the first class SI according to the scheduling list.

13. User equipment, comprising:

a processor; and

a memory for storing instructions executable by the processor;

wherein the processor is configured to:

determine a receiving window and a preamble associated with to-be-requested system information (SI) in response to receiving first class SI broadcast by a base station, wherein the to-be-requested SI belongs to second class SI;

send the preamble in an uplink subframe configured for sending the preamble in response to arrival of the receiving window associated with the to-be-requested SI; and

receive the to-be-requested SI within the receiving window associated with the to-be-requested SI, wherein the to-be-requested SI is sent by the base station according to the receiving window.

14. The user equipment of claim 13 , wherein determining the receiving window associated with the to-be-requested SI comprises:

obtaining a scheduling list of the second class SI according to the first class SI, wherein the scheduling list is configured to record a receiving window length and a scheduling periodicity of the second class SI; and

determining the receiving window associated with the to-be-requested SI according to the receiving window length and the scheduling periodicity recorded in the scheduling list.

15. The user equipment of claim 14 , wherein determining the receiving window associated with the to-be-requested SI according to the receiving window length and the scheduling periodicity recorded in the scheduling list comprises:

obtaining a starting frame of the receiving window associated with the to-be-requested SI according to an appearance order of the to-be-requested SI in the scheduling list, the scheduling periodicity of the to-be-requested SI, and the receiving window length associated with each of the second class SI;

obtaining a starting subframe of the receiving window associated with the to-be-requested SI according to the appearance order of the to-be-requested SI in the scheduling list and the receiving window length associated with each of the second class SI; and

determining consecutive M subframes from the starting subframe as the receiving window associated with the to-be-requested SI, wherein M refers to a length of the receiving window associated with the to-be-requested SI.

16. The user equipment of claim 13 , wherein the processor is further configured to:

obtain a time-frequency resource configured for sending the preamble according to the first class SI;

determine a first uplink subframe configured for sending the preamble according to the time-frequency resource; and

perform an operation of sending the preamble in the uplink subframe configured for sending the preamble according to the first uplink subframe.

17. The user equipment of claim 13 , wherein the processor is further configured to:

determine a first uplink subframe configured for sending the preamble according to a system preset time-frequency resource; and

perform an operation of sending the preamble in the uplink subframe configured for sending the preamble according to the first uplink subframe.

18. The user equipment of claim 13 , wherein receiving the to-be-requested SI within the receiving window associated with the to-be-requested SI comprises:

determining whether the to-be-requested SI is sent on a physical downlink shared channel according to an SI scheduling instruction; and

when the to-be-requested SI is sent on the physical downlink shared channel, receiving the to-be-requested SI on the physical downlink shared channel within the receiving window associated with the to-be-requested SI.

19. A base station, comprising:

a processor; and

a memory for storing instructions executable by the processor,

wherein the processor is configured to execute the instructions to perform the method of claim 9 .

20. The base station of claim 19 , wherein the processor is further configured to:

for each second class SI, determine scheduling information which comprises a receiving window length and a scheduling periodicity;

add the scheduling information of the second class SI to a scheduling list in an order, wherein the user equipment is caused to calculate a corresponding receiving window associated with the SI according to the order; and

generate the first class SI according to the scheduling list.