Method of group based MTC messaging through cell broadcast and apparatuses using the same

• US 9,094,779 B2
• Filed: 07/02/2013
• Issued: 07/28/2015
• Est. Priority Date: 07/03/2012
• Status: Active Grant

• Current Assignee: HTC Corporation
• Original Assignee: HTC Corporation
• Inventors: Liao, Ching-Yu
• Primary Examiner(s): Patel, Ajit
• Application Number:
  US13/933,137
• Publication Number:
  US 20140011505A1
• Time in Patent Office: 756 Days
• Field of Search: 455/422.1, 455450-4522, 455/458
• US Class Current: 1/1
• 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 4/08 User group management
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
• CPC Class Codes: H04W 48/10 using broadcasted information
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 68/025 Indirect paging
• CPC Class Codes: H04W 72/30 Resource management for broadcast services

Abstract

The present disclosure proposes a method and apparatuses of implementing MTC group trigger messages through a Cell Broadcasting Service (CBS). The method includes a MTC (Machine Type Communication) server transmitting to a MTC Inter-working Function (MTC-IWF) a trigger payload. The trigger payload would be delivered by the MTC-IWF to a group of MTC devices through Cell Broadcasting Center (CBC) and network nodes. The trigger payload may include a group trigger message indicator which distinguishes the group trigger message from a normal warning message. In response to receiving the content of the trigger payload, the network would page a group of MTC devices. From the group trigger message indicator embedded in the paging message, each MTC device would be able to receive a group trigger message through new system information block of the broadcast information.

Claims

1. A method of receiving a group trigger message sent to a group of Machine Type Communication (MTC) devices based on a Cell Broadcast Service (CBS) messaging system comprising:

receiving a paging message comprising an indicator indicating a resource for a group trigger message to be received;

receiving a broadcast message in response to receiving the paging message;

determining the resource from the broadcast message in which the group trigger message is obtained based on the indicator;

obtaining the group trigger message from the resource of the broadcast message; and

determining the resource from the broadcast message which is a system information block (SIB) in response to receiving the indicator, wherein the SIB is a SIB other than SIB x, and x is an integer only from 1 to 13, wherein the SIB comprises an access barring parameter which randomizes a response time for each terminal target to respond according to a randomized delay.

2. The method of claim 1, wherein the SIB further comprises at least one of a group identifier (ID), a message ID, a serial number of the broadcast message, a priority indicator of the message, a mobile originated (MO) transmission flag, and a trigger payload.

3. The method of claim 1, wherein the indicator comprises an information element which indicates a type which is other than a warning type.

4. The method of claim 2, wherein the system information block further comprises a MO transmission duration which randomizes a response time for each terminal target to initiate a service request or an attach procedure.

5. A method of transmitting a group trigger message to a group of Machine Type Communication (MTC) devices based on a Cell Broadcast Service (CBS) messaging system comprising:

receiving over a first interface a first message comprising an information element (IE) which indicates that the first message is intended for a group of MTC devices;

transmitting a paging message comprising a group trigger message indicator which indicates a resource in a system information block (SIB) for the first message; and

transmitting to the group of MTC devices over a cell broadcast channel a broadcast message comprising the first message which is embedded in the SIB of the broadcast message;

wherein the SIB is a SIB other than SIB x, and x is an integer only from 1 to 13, wherein the SIB comprises an access barring parameter which randomizes a response time for each of the group of MTC devices to respond according to a randomized delay.

6. The method of claim 5, wherein the first message is one of a Broadcast Request message and a Write-Replace Warning Request message.

7. The method of claim 6, wherein in response to receiving the first message, the base station obtains from the IE of the first message a value which indicates the first message is intended for the group of MTC devices.

8. The method of claim 6, wherein in response to receiving the first message, the base station obtains from the IE of the first message a type which indicates the first message is intended for the group of MTC devices and differs from the warning message.

9. The method of claim 5, wherein the group trigger message indicator points to the SIB which is different from the another SIB reserved for the warning message.

10. The method of claim 9, wherein the SIB further comprises at least one of a group identifier (ID), a message ID, a serial number of the broadcast message, a priority indicator, a mobile originated (MO) transmission flag, and a trigger payload.

11. The method of claim 5 wherein the IE is set by any of a Machine Type Communication Inter-working Function (MTC-IWF), a Home Subscriber Server (HSS), and a MTC server.

12. The method of claim 5, wherein the IE comprises a MO transmission duration which is for each terminal target to randomize response time within the MO transmission duration to initiate a service request or an attach procedure.