Method, base station, terminal and system for system information transmission

Patent metadata

Field	Value
Publication number	US-2016353473-A1
Application number	US-201415114525-A
Country	US
Kind code	A1
Filing date	Aug 5, 2014
Priority date	Jan 28, 2014
Publication date	Dec 1, 2016
Grant date	—

Abstract

A method for transmitting System Information (SI) includes that: a base station sequentially sends first to Xth SI according to scheduling periods and repeat times of the first to Xth SI in preset N pieces of SI ( 101 ), wherein N is a positive integer larger than 1, X is a positive integer larger than 1 and smaller than or equal to N, and the scheduling period and repeat times of the first SI are preset; and the base station notifies the scheduling periods and repeat times of the second to Xth SI through fields in the first SI ( 102 ). A base station, terminal and system for implementing the abovementioned method are also provided.

First claim

What is claimed is:

1 . A method for transmitting System Information (SI), comprising:
sequentially sending, by a base station, first to Xth SI according to scheduling periods and repeat times of the first to Xth SI in preset N pieces of SI, wherein N is a positive integer larger than 1, X is a positive integer larger than 1 and smaller than or equal to N, and the scheduling period and repeat times of the first SI are preset, wherein the scheduling periods and repeat times of the second to Xth SI are notified by the base station through fields in the first SI.

2 . The method according to claim 1 , further comprising:
when X is smaller than N, sending, by the base station, (X+1)th to Nth SI in the preset N pieces of SI through a terminal-specific Radio Resource Control (RRC) message.

3 . The method according to claim 1 , further comprising:
sending, by the base station, the first to Xth SI through a preset logical resource block.

4 . The method according to claim 1 , wherein any piece of SI in the preset N pieces of SI comprises at least one of existing System Information Blocks (SIBs), or new SI specific to a coverage-enhanced Machine Type Communication (MTC) terminal.

5 . The method according to claim 1 , wherein the scheduling period of the first SI is an integral multiple of a duration of a radio frame;
the second to Xth SI has a same or different scheduling periods; and the scheduling period of each of the second to Xth SI is an integral multiple of the scheduling period of the first SI, and is one of K preset scheduling periods, wherein K is a positive integer larger than 1.

6 . (canceled)

7 . The method according to claim 1 , wherein the second to Xth SI has same or different repeat times; and
the repeat times of each of the second to Xth SI is one of M preset repeat times, wherein M is a positive integer larger than 1.

8 . The method according to claim 1 , wherein, for the first SI, sequentially sending the first to Xth SI according to the scheduling periods and repeat times of the first to Xth SI in the preset N pieces of SI comprises:
determining radio frames of the first SI according to the scheduling period of the first SI; and sending the first SI through R (1) continuous sub-frames starting from a determined sub-frame within a range of the radio frames, wherein R (1) is the repeat times of the first SI.

9 . The method according to claim 1 , wherein, for nth SI, sequentially sending the first to Xth SI according to the scheduling periods and repeat times of the first to Xth SI in the preset N pieces of SI comprises:
determining radio frames of the nth SI according to a scheduling period of the nth SI; taking a first sub-frame which is for sending the first SI within a range of the radio frames of the nth SI to be reference sub-frames of the nth SI; determining sub-frames for sending the nth SI according to the repeat times of the first SI and reference sub-frames and repeat times of the second to nth SI; and sending the nth SI through the determined sub-frames, wherein n is a positive integer larger than or equal to 2 and smaller than or equal to X, a set of the radio frames of the nth SI is included in a set of the radio frames of the first SI, and an interval between two adjacent sub-frames in the reference sub-frames of the nth SI is equal to the scheduling period of the nth SI.

10 . The method according to claim 8 , wherein an index IDX frame (1) of each radio frame of the first SI is determined according to the following equation:

mod


(

IDX
frame

(
1
)

,

T

(
1
)

D
frame

)

=
0

,

where the T (1) represents the scheduling period of the first SI, the D frame represents a duration of each of the radio frames, and mod represents a remainder calculation.

11 . The method according to claim 9 , wherein an index IDX frame (n) of each of the radio frames of the nth SI is determined according to the following equation:

mod


(

IDX
frame

(
n
)

,

T

(
n
)

D
frame

)

=

k

(
n
)

,

where k (n) represents an offset of each of the radio frames of the nth SI, and is an integral multiple of the number of the radio frames in the scheduling period of the first SI, T (n) represents the scheduling period of the nth SI, D frame represents a duration of each of the radio frames, and mod represents a remainder calculation.

12 . The method according to claim 11 , wherein determining the sub-frames for sending the nth SI according to the repeat times of the first SI and the reference sub-frames and repeat times of the second to nth SI comprises:
for any reference sub-frame of the nth SI, when n is equal to 2, determining sub-frame offsets of sending sub-frames of the second SI corresponding to the reference sub-frame of the second SI according to the repeat times of the first SI; when n is larger than 2, determining sub-frame offsets of sending sub-frames of the nth SI corresponding to the reference sub-frame of the nth SI according to the repeat times of the first SI and repeat times of SI which also takes the sub-frame as a reference sub-frame in the second to (n−1)th SI; determining the sending sub-frames of the nth SI corresponding to the reference sub-frame of the nth SI according to the sub-frame offsets of the sending sub-frames of the nth SI corresponding to the reference sub-frame of the nth SI and the repeat times of the nth SI; and the sub-frames for sending the nth SI comprise: sending sub-frames of the nth SI corresponding to all the reference sub-frames of the nth SI.

Assignees

• Zte Corp

Inventors

• Chen Xianming
• Dai Bo
• Lu Zhaohua

Classifications

• H04W4/70

  Services for machine-to-machine communication [M2M] or machine type communication [MTC] · CPC title

• H04L1/08

  by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} · CPC title

• H04W84/042

  Public Land Mobile systems, e.g. cellular systems · CPC title

• H04W48/10

  using broadcasted information · CPC title

• H04W72/1273 Primary

  of downlink data flows · CPC title