Method and Apparatus for Transmitting and Receiving System Information

Patent metadata

Field	Value
Publication number	US-2016337106-A1
Application number	US-201415111753-A
Country	US
Kind code	A1
Filing date	Jul 9, 2014
Priority date	Jan 16, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

Disclosed are a method and an apparatus for transmitting and receiving system information. The method for transmitting comprises: determining a system information repetition transmission resource area within a system information scheduling period, wherein the system information repetition transmission resource area comprises resource elements for repetitively transmitting the system information; and the receiving method comprises: a terminal detecting system information within a system information scheduling period, wherein the system information is system information transmitted on a broadcast channel and system information transmitted on a system information repetition transmission resource area, the system information repetition transmission resource area comprises resource elements for repetitively transmitting the system information.

First claim

1 . A method for transmitting system information, comprising:
determining a system information repetition transmission resource area within a system information scheduling period, wherein the system information repetition transmission resource area comprises resource elements for repetitively transmitting system information.

2 . The method for transmitting system information according to claim 1 , wherein, within a system information scheduling period, sub-frame resources corresponding to the system information repetition transmission resource area within the system information scheduling period are configured according to any one or more of follows:
the system information repetition transmission resource area being on sub-frame 0 of a radio frame; the system information repetition transmission resource area being on sub-frame 0 of a radio frame and sub-frame 5 of a radio frame with an odd system frame number; and the system information repetition transmission resource area being on sub-frame 0 of a radio frame and N other sub-frames of the radio frame, N≧1 and N<10.

3 . The method for transmitting system information according to claim 1 , wherein,
the system information repetition transmission resource area consists of one or more system information repetition transmission resource area blocks, one system information repetition transmission resource area block consists of M continuous OFDM (Orthogonal Frequency Division Multiplexing) symbols in time domain and comprises 72 subcarriers in frequency domain, M≧1 and M≦7.

4 . The method for transmitting system information according to claim 1 , wherein,
the system information repetition transmission resource area does not comprise resource areas occupied by a physical downlink control channel and broadcast channel and a synchronizing signal within a sub-frame, wherein the resource area occupied by the physical downlink control channel is on first four OFDM symbols, or first three OFDM symbols or first two OFDM symbols of a sub-frame.

5 . The method for transmitting system information according to claim 1 , wherein, after the step of determining a system information repetition transmission resource area within a system information scheduling period, the method further comprises:
a base station determining according to a predefined transmission mode or dynamically determining whether to transmit the repetitively-transmitted system information within the system information scheduling period.

6 . The method for transmitting system information according to claim 4 , wherein the method further comprises:
within a frame number transmission period, predefining repetitively transmitting system information within one or more system information scheduling periods as the predefined transmission mode.

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41 . The method for transmitting system information according to claim 1 , wherein the method further comprises:
mapping the system information to available resource elements of the system information repetition transmission resource area within a system information scheduling period to transmit.

42 . The method for transmitting system information according to claim 41 , wherein mapping the system information to available resource elements of the system information repetition transmission resource area within a system information scheduling period to transmit comprises:
mapping a system information coding block transmitted on a broadcast channel to the system information repetition transmission resource area to transmit.

43 . The method for transmitting system information according to claim 41 , wherein the method further comprises:
determining a mapping mode according to whether the system information repetition transmission resource contains CRSs.

44 . The method for transmitting system information according to claim 43 , wherein determining a mapping mode according to whether the system information repetition transmission resource contains CRSs comprises:
selecting and mapping system information coding blocks transmitted on broadcast channel resource symbols containing the CRSs to resource elements corresponding to symbols containing the CRSs in the system information repetition transmission resource area blocks; and selecting and mapping system information coding blocks transmitted on broadcast channel resource symbols not containing the CRSs to resource elements corresponding to symbols not containing the CRSs in the system information repetition transmission resource area blocks.

45 . The method for transmitting system information according to claim 1 , wherein the available resource elements of the system information repetition transmission resource area refer to resource elements except resource elements for transmitting Cell-specific Reference Signals (CRSs) in the system information repetition transmission resource area.

46 . The method for transmitting system information according to claim 1 , wherein the system information refers to Master Information Block (MIB) or Advanced Master Information Block (Advanced-MIB) plus Cyclic Redundancy Check (CRC), wherein a length of the MIB is 24 bits and a length of the CRC is 16 bits.

47 . The method for transmitting system information according to claim 41 , wherein the method further comprises:
when determining to transmit the repetitively-transmitted system information within a current system information scheduling period, performing coding, rate matching, scrambling and modulation on the system information.

48 . The method for transmitting system information according to claim 41 , wherein,
the coding, rate matching, scrambling, modulation and mapping are performed within one system information scheduling period.

49 . The method for transmitting system information according to claim 48 , wherein performing coding, rate matching, scrambling and modulation on the system information, and mapping the system information obtained after the coding, rate matching, scrambling and modulation to available resource elements of the system information repetition transmission resource area within the system information scheduling period to transmit comprises:
determining a coding bit length of the repetitively-transmitted system information after rate matching according to a total number of available resource elements in all system information repe

Assignees

• Zte Corp

Inventors

• Fang Huiying
• Dai Bo
• Shi Jing
• Xia Shuqiang
• Wu Lijie
• Lu Zhaohua

Classifications

• H04W48/12 Primary

  using downlink control channel · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04Q2213/13215

  Code checking, CRC · CPC title

• H04L5/0082

  at predetermined intervals · CPC title

• H04L1/0068

  by puncturing · CPC title