Method, apparatus, user equipment and base station for sending and receiving system information

Patent metadata

Field	Value
Publication number	US-10440638-B2
Application number	US-201616348498-A
Country	US
Kind code	B2
Filing date	Nov 11, 2016
Priority date	Nov 11, 2016
Publication date	Oct 8, 2019
Grant date	Oct 8, 2019

Abstract

Related are a method, an apparatus, user equipment and a base station for sending and receiving SI. The method of receiving SI comprises: in response to receiving first-class SI broadcast by a base station, determining a requesting window, a receiving window and a pilot code of to-be-requested SI, where the requesting window includes P number of time domain sending opportunities for sending a request carrying the pilot code; monitoring a first Q number of time domain sending opportunities within the requesting window to determine whether a request carrying the pilot code is sent from UE to the base station; when no UE sends the request carrying the pilot code, sending the request carrying the pilot code in the (Q+1)-th time domain sending opportunity; and monitoring the receiving window of the to-be-requested SI for the to-be-requested SI sent by the base station.

First claim

What is claimed is:

1. A method of receiving system information (SI), comprising:
in response to receiving first-class SI broadcasted by a base station, determining a requesting window, a receiving window, and a pilot code of to-be-requested SI, wherein the to-be-requested SI belongs to second-class SI, the requesting window comprises P number of time domain sending opportunities, and each time domain sending opportunity corresponds to one subframe associated with an opportunity for sending a request carrying the pilot code;
monitoring a first Q number of time domain sending opportunities within the requesting window to determine whether a request carrying the pilot code is sent from user equipment to the base station, wherein P is an integer greater than 1 and Q indicates a natural number less than P;
when it is monitored that no user equipment sends the request carrying the pilot code to the base station with the first Q number of time domain sending opportunities of the requesting window, sending the request carrying the pilot code at the (Q+1)-th time domain sending opportunity; and
monitoring the receiving window of the to-be-requested SI for the to-be-requested SI sent by the base station.

2. The method of claim 1 , wherein when the requesting window is located within the receiving window, determining the receiving window of the to-be-requested SI comprises:
analyzing a scheduling list of second-class SI from the first-class SI, wherein the scheduling list records a receiving window length and a receiving window scheduling periodicity of the second-class SI; and
determining the receiving window of the to-be-requested SI according to the receiving window length and the receiving window scheduling periodicity recorded in the scheduling list.

3. The method of claim 2 , wherein determining the requesting window of the to-be-requested SI comprises:
analyzing a requesting window length P of the second-class SI from the first-class SI; and
determining P number of time domain sending opportunities within the receiving window which start from a first time domain sending opportunity for sending the request carrying the pilot code as the requesting window of the to-be-requested SI.

4. The method of claim 2 , wherein determining the receiving window of the to-be-requested SI according to the receiving window length and the receiving window scheduling periodicity recorded in the scheduling list comprises:
calculating a starting frame of the receiving window of the to-be-requested SI according to an appearance order of the to-be-requested SI in the scheduling list, a scheduling periodicity of the to-be-requested SI, a number of subframes included in each frame, and the receiving window length of each piece of second-class SI;
calculating a starting subframe of the receiving window of the to-be-requested SI according to the appearance order of the to-be-requested SI in the scheduling list, the number of subframes included in each frame, and the receiving window length of each piece of second-class SI; and
determining consecutive M subframes starting from the starting subframe as the receiving window of the to-be-requested SI, wherein M refers to the length of the receiving window of the to-be-requested SI.

5. The method of claim 1 , wherein when the requesting window is independent from the receiving window of the second-class SI, determining the requesting window of the to-be-requested SI comprises:
analyzing a requesting window length and a requesting window scheduling periodicity of the second-class SI from the first-class SI; and
determining the requesting window of the second-class SI according to the requesting window length and the requesting window scheduling periodicity of the second-class SI, wherein the requesting window of the second-class SI is the requesting window of the to-be-requested SI.

6. The method of claim 5 , determining the receiving window of the to-be-requested SI comprises:
analyzing a scheduling list of second-class SI from the first-class SI, wherein the scheduling list records a receiving window length and a receiving window scheduling periodicity of the second-class SI;
determining a starting receiving window of the second-class SI according to the receiving window length and the receiving window scheduling periodicity recorded in the scheduling list;
when the starting receiving window of the second-class SI is overlapped with the requesting window of the second-class SI, adjusting the starting receiving window to be located after the requesting window of the second-class SI;
calculating a starting frame of the receiving window of the to-be-requested SI according to the starting receiving window of the second-class SI, an appearance order of the to-be-requested SI in the scheduling list, a scheduling periodicity of the to-be-requested SI, a number of subframes included in each frame, and the receiving window length of each piece of second-class SI;
calculating a starting subframe of the receiving window of the to-be-requested SI according to the appearance order of the to-be-requested SI in the scheduling list, the number of subframes included in each frame, and the receiving window length of each piece of second-class SI; and
determining consecutive M subframes starting from the starting subframe as the receiving window of the to-be-requested SI, wherein M refers to the length of the receiving window of the to-be-requested SI.

7. The method of claim 1 , further comprising:
analyzing a time domain sending opportunity offset value A of the requesting window of the to-be-requested SI from the first-class SI;
randomly selecting one time domain sending opportunity from the (1+A)-th to P-th time domain sending opportunities of the requesting window as the Q-th time domain sending opportunity of the requesting window; and
based on the Q-th time domain sending opportunity, executing an operation of monitoring a first Q number of time domain sending opportunities within the requesting window to determine whether the request carrying the pilot code is sent from the user equipment to the base station.

8. The method of claim 1 , further comprising:
determining a (1+A)-th time domain sending opportunity of the requesting window as the Q-th time domain sending opportunity of the requesting window, wherein the A refers to an offset value preset by a system or randomly selected by user equipment; or
randomly selecting one time domain sending opportunity from the first to (P−1)-th time domain sending opportunities of the requesting window as the Q-th time domain sending opportunity of the requesting window; and
based on the Q-th time domain sending opportunity, executing an operation of monitoring a first Q number of time domain sending opportunities within the requesting window to determine whether the request carrying the pilot code is sent from the user equipment to the base station.

9. The method of claim 1 , further comprising:
when it is monitored that a request carrying a pilot code is sent from user equipment to the base station with the first Q number of time domain sending opportunities of the requesting window, monitoring the receiving window of the to-be-requested SI for the to-be-requested SI sent by the base station.

10. The method of claim 1 , further comprising:
when an instruction is received within the receiving window of the to-be-requested SI,
executing an operation of continuing to monitor the to-be-requested SI in a next receiving window according to the instruction; or
requesting the to-be-requested SI from the base station in a unicast manner according to the instruction.

11. A method of sending SI, comprising:
sending first-class

Assignees

• Beijing Xiaomi Mobile Software Co Ltd

Inventors

• Jiang Xiaowei

Classifications

• H04W48/14 Primary

  using user query {or user detection} · CPC title

• H04L5/0044

  Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH · CPC title

• H04B7/06 Primary

  at the transmitting station · CPC title

• H04L5/0039

  Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another · CPC title

• H04L5/0037

  Inter-user or inter-terminal allocation · CPC title