Physical broadcast channel repetition for evolved machine type communication

Patent metadata

Field	Value
Publication number	US-2016338010-A1
Application number	US-201615081633-A
Country	US
Kind code	A1
Filing date	Mar 25, 2016
Priority date	May 14, 2015
Publication date	Nov 17, 2016
Grant date	—

Abstract

Certain aspects of the present disclosure generally relate to wireless communications, and more specifically, to physical broadcast channel (PBCH) or other type channel repetition for enhanced machine type communication (eMTC). According to certain aspects, a method is provided for wireless communications by a base station (BS). The method generally includes determining a repetition pattern indicating subframes of a radio frame in which a channel is to be transmitted and transmitting the channel according to the determined repetition pattern.

First claim

What is claimed is:

1 . A method for wireless communications by a base station (BS), comprising:
determining a repetition pattern indicating subframes of a radio frame in which a channel is to be transmitted; and transmitting the channel according to the determined repetition pattern.

2 . The method of claim 1 , wherein the determination is based at least in part on a subframe configuration.

3 . The method of claim 2 , wherein a different repetition pattern is determined for a frequency division duplex (FDD) subframe configuration than for a time division duplex (TDD) subframe configuration.

4 . The method of claim 3 , wherein, for an FDD subframe configuration, the repetition pattern comprises one or more subframes used for paging.

5 . The method of claim 3 , wherein, for an FDD subframe configuration, the repetition pattern comprises a fifth subframe of the radio frame, and wherein, for a TDD subframe configuration, the repetition pattern comprises a ninth subframe of the radio frame.

6 . The method of claim 3 , wherein repetition patterns for an FDD subframe configuration and a TDD subframe configuration share at least one common subframe.

7 . The method of claim 1 , wherein the determination is based, at least in part, on an operating bandwidth, and wherein, for certain subframe configurations, a given subframe is included in the repetition pattern only for certain operating bandwidths.

8 . The method of claim 1 , wherein the channel comprises a physical broadcast channel.

9 . The method of claim 1 , further comprising puncturing one or more other channels when transmitting the channel according to the determined repetition pattern.

10 . The method of claim 1 , further comprising transmitting signaling indicating that the channel is to be transmitted according to the determined repetition pattern.

11 . The method of claim 10 , wherein:
the channel comprises a physical broadcast channel (PBCH); and the signaling is provided via a system information block (SIB) transmission.

12 . The method of claim 10 , further comprising puncturing one or more other channels when transmitting the channel according to the determined repetition pattern.

13 . The method of claim 12 , wherein at least one of:
the one or more other channels comprise channels decodable by legacy devices that do not support transmission of the channel according to the determined repetition pattern; or the one or more other channels comprise channels decodable by devices that are not aware of the transmission of the channel according to the determined repetition pattern.

14 . The method of claim 10 , further comprising rate matching one or more other channels around the channel according to the determined repetition pattern, and wherein the one or more other channels comprise channels decodable by devices that are aware of the transmission of the channel according to the determined repetition pattern.

15 . A method for wireless communications by a user equipment (UE), comprising:
determining a repetition pattern indicating subframes of a radio frame in which a channel is to be transmitted; and monitoring for transmission of the channel according to the determined repetition pattern.

16 . The method of claim 15 , wherein the determination is based, at least in part, on a subframe configuration, and wherein the channel comprises a physical broadcast channel.

17 . The method of claim 16 , wherein a different repetition pattern is determined for a frequency division duplex (FDD) subframe configuration than for a time division duplex (TDD) subframe configuration.

18 . The method of claim 17 , wherein, for an FDD subframe configuration, the repetition pattern comprises one or more subframes used for paging.

19 . The method of claim 17 , wherein, for an FDD subframe configuration, the repetition pattern comprises a fifth subframe of the radio frame, and wherein, for a TDD subframe configuration, the repetition pattern comprises a ninth subframe of the radio frame.

20 . The method of claim 17 , wherein repetition patterns for an FDD subframe configuration and a TDD subframe configuration share at least one common subframe.

21 . The method of claim 15 , wherein the determination is based, at least in part, on an operating bandwidth, and wherein, for certain subframe configurations, a given subframe is included in the repetition pattern only for certain operating bandwidths.

22 . The method of claim 15 , wherein the determination is based on detecting of repeated transmission of the channel without prior knowledge of the repetition pattern.

23 . The method of claim 15 , further comprising performing rate matching based on one or more other channels when monitoring for transmission of the channel according to the determined repetition pattern, and wherein the one or more other channels comprise channels decodable by legacy devices that do not support transmission of the channel according to the determined repetition pattern.

24 . The method of claim 15 , wherein the determination is based on received signaling indicating that the channel is to be transmitted according to the determined repetition pattern.

25 . The method of claim 24 , wherein:
the channel comprises a physical broadcast channel (PBCH); and the signaling is provided via a system information block (SIB) transmission.

26 . The method of claim 24 , further comprising performing rate matching based on one or more other channels when monitoring for the channel according to the determined repetition pattern.

27 . The method of claim 26 , wherein the one or more other channels comprise channels decodable by devices that are not aware of the transmission of the repeated channel according to the determined repetition pattern.

28 . The method of claim 24 , further comprising rate matching one or more other channels around the channel according to the determined repetition pattern, and wherein the one or more other channels comprise channels decodable by devices that are aware of the transmission of the channel according to the determined repetition pattern.

29 . An apparatus for wireless communications by a base station (BS), comprising:
at least one processor configured to:
determine a repetition pattern indicating subframes of a radio frame in which a channel is to be transmitted; and
transmit the channel according to the determined repetition pattern; and
a memory coupled with the at least one processor.

30 . An apparatus for wireless communications by a user equipment (UE), comprising:
at least one processor configured to:
determine a repetition pattern indicating subframes of a radio frame in which a channel is to be transmitted; and
monitor for transmission of the channel according to the determined repetition pattern; and
a memory coupled with the at least one processor.

Assignees

• Qualcomm Inc

Inventors

• Rico Alvarino Alberto
• Chen Wanshi
• Xu Hao
• Vajapeyam Madhavan Srinivasan
• Gaal Peter

Classifications

• H04W72/23 Primary

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/12

  Wireless traffic scheduling · CPC title

• H04W72/30

  Resource management for broadcast services · CPC title

• H04L5/1469

  using time-sharing · CPC title

• H04W72/042

  Electricity · mapped topic