Support of Emergency Alert in 802.16m (AWD-15.2)
IEEE 802.16 Presentation Submission Template (Rev. 9)
Document Number:
IEEE C802.16m-09/1554r1
Date Submitted:
2009-07-09
Source:
Kanchei (Ken) Loa, Chiu-Wen Chen, Chun-Yen Hsu,
Youn-Tai Lee, Yi-Ting Lin, Tsung-Yu Tsai
Institute for Information Industry (III)
Whai-En Chen, Shih-Yuan Cheng
National Ilan University (NIU)
Chih-Cheng Yang
National Central University (NCU)
E-mail: loa@iii.org.tw
Venue:
IEEE 802.16 Plenary, Session #62, San Francisco, California, USA
AWD-15.2; in response to the TGm Call for Comments and Contributions 802.16m-09/0028r1 for Session 62
Base Contribution:
N/A
Purpose:
For discussion and approval by IEEE 802.16 TGm
Notice:
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the “Source(s)” field above. It is offered as a basis for discussion. It is not binding on the contributor(s), who reserve(s) the right to add, amend or withdraw material
contained herein.
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Introductions
• Emergency alert is to deliver the emergency information
such as disaster warning targeted to a specific area
– Emergency alert may reduce the risk and decrease the damage
– Emergency alert is sent by ABSs
• It includes transmissions of emergency alert indicator and emergency
information
– The FCC requires disaster recovery maintenance, testing,
prevention, emergency procedures, and recovery strategies
for the timely resumption of essential services during
emergencies
Introductions
• The issue is: How to alert the AMSs effectively?
• In this contribution, an emergency alert procedure is
proposed to notify all AMSs the imminent disaster
• The concept of emergency alert procedure
– The emergency information is broadcasted
• All AMSs in connected state will receive the emergency information
– The emergency indicator is used to notify AMSs in idle
state the transmissions of emergency information
• AMSs in idle state will receive the emergency information in
addition to paging message
Emergency alert procedure
• Emergency alert indicator
– For alerting the idle AMS, the paging message
includes an emergency alert indicator
• Emergency alert information
– Upon receipt of the emergency alert indicator, the
AMSs shall decode the A-A-MAP to obtain the
emergency information
• Transmissions of emergency information shall be
indicated in the A-A-MAP using the pre-defined
broadcast or multicast STID
Proposed text for the 802.16m AWD
• [Modify the following text in Line 37, Page 8 as
indicated:]
• 15.2.1.2.1 Station Identifier (STID)
The ABS assigns a 12 bits long STID to the AMS
during network entry, and, in some cases, network
re-entry, that uniquely identifies the AMS within
the domain of the ABS. Each AMS registered in
the network has an assigned STID. Some specific
“STIDs” are reserved, for example, for broadcast,
multicast, emergency alert, and ranging.
Proposed text for the 802.16m AWD
• [Insert the following text in Line 60, Page 99 as
indicated:]
• 15.2.17.2.1 Broadcast paging message
Paging message includes identification of the AMSs
(i.e. temporary identifier) to be notified of DL traffic
pending or location update. In addition, an emergency
alert indicator is included in the paging message to
notify the idle AMSs reception of the emergency
information.
Proposed text for the 802.16m AWD
• [Insert the following text in Line 55, Page 100 as
indicated:]
• 15.2.17.2.3 Operation during paging listening interval
At the beginning of the paging listening interval, the AMS
shall scan and synchronize on the A-PREAMBLE of its
preferred ABS and decode the P-SFH of the ABS. Upon
reception of the emergency alert indicator that is set to ‘1’,
the AMS shall decode the A-A-MAP to obtain the
emergency information.