Receiving cell broadcast (CB) messages

• US 9,148,872 B2
• Filed: 12/22/2014
• Issued: 09/29/2015
• Est. Priority Date: 07/15/2011
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Dhanda, Mungal Singh, Robinson, Nigel Phillip, Gupta, Ajit, Walke, Simon, Janga, Bhanu Kiran, Kanthala, Venkata Raji Reddy, Mutya, Subbarayudu
• Primary Examiner(s): Faroul, Farah
• Application Number:
  US14/579,256
• Publication Number:
  US 20150111588A1
• Time in Patent Office: 281 Days
• Field of Search: 370/252, 370/312
• US Class Current: 1/1
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 48/10 using broadcasted information
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A method for receiving cell broadcast messages is described. The method includes communicating with a first cell. The method also includes switching to communicating with a second cell. A cell broadcast channel is read after switching cells. The method further includes switching from a dedicated mode to a packet idle mode. The cell broadcast channel is reread once after switching from a dedicated mode to a packet idle mode. Other aspects, embodiments and features are also claimed and described.

Claims

1. A method for receiving cell broadcast messages, comprising:

receiving a trigger to read a cell broadcast channel;

determining that a network does not support cell broadcast scheduling messages;

reducing a rate at which the cell broadcast channel is read; and

rereading the cell broadcast channel at the reduced rate.

2. The method of claim 1, wherein the method is performed by a wireless communication device.

3. The method of claim 2, wherein reducing the rate at which the cell broadcast channel is read comprises using pseudo scheduling information.

4. The method of claim 3, wherein the pseudo scheduling information gives a cell broadcast channel higher priority than a paging channel.

5. The method of claim 3, wherein the pseudo scheduling information is such that the wireless communication device reads all cell broadcast message slots until a schedule map has expired.

6. The method of claim 1, further comprising:

determining that all the desired messages have been read; and

discontinuing rereading the cell broadcast channel at the reduced rate.

7. An apparatus for receiving cell broadcast messages, comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory, the instructions being executable by the processor to;

receive a trigger to read a cell broadcast channel;

determine that a network does not support cell broadcast scheduling messages;

reduce a rate at which the cell broadcast channel is read; and

reread the cell broadcast channel at the reduced rate.

8. The apparatus of claim 7, wherein the apparatus is a wireless communication device.

9. The apparatus of claim 8, wherein the instructions executable to reduce the rate at which the cell broadcast channel is read comprise instructions executable to use pseudo scheduling information.

10. The apparatus of claim 9, wherein the pseudo scheduling information gives a cell broadcast channel higher priority than a paging channel.

11. The apparatus of claim 9, wherein the pseudo scheduling information is such that the wireless communication device reads all cell broadcast message slots until a schedule map has expired.

12. The apparatus of claim 7, wherein the instructions are further executable to:

determine that all the desired messages have been read; and

discontinue rereading the cell broadcast channel at the reduced rate.