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Doc.: IEEE 802.11-11/1205r1 Submission September 2011 ZTE CorporationSlide 1 Consideration on battery power alarm mechanism for IEEE 802.11ah framework.

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Presentation on theme: "Doc.: IEEE 802.11-11/1205r1 Submission September 2011 ZTE CorporationSlide 1 Consideration on battery power alarm mechanism for IEEE 802.11ah framework."— Presentation transcript:

1 doc.: IEEE 802.11-11/1205r1 Submission September 2011 ZTE CorporationSlide 1 Consideration on battery power alarm mechanism for IEEE 802.11ah framework Date: 2011-09-18 Authors:

2 doc.: IEEE 802.11-11/1205r1 Submission Abstract This presentation introduces methods to support reporting battery power alarm of battery-powered sensors, and corresponding QoS priority of this kind of report. September 2011 ZTE CorporationSlide 2

3 doc.: IEEE 802.11-11/1205r1 Submission Why considering it in 802.11ah? 1)In Use case 1, most of sensors or other monitor devices powered by battery use the 11ah wireless controller to communicate with 11ah AP. In some use cases deploying in agricultural or other relatively bad environment, device maintenance is relatively difficult in this case including battery information of the device. The service provider can benefit from knowing the battery voltage value of the device or being alarmed by power shortage of battery actively, for example power level lower than predefined threshold. 2)Some general ideas regarding proposed MAC mechanism Simple, and reusing existing mechanism with tiny extension May run as a basic function without upper layer software, to save power (upper layer application of course feasible while providing enhanced functionalities of battery management) September 2011 ZTE CorporationSlide 3

4 doc.: IEEE 802.11-11/1205r1 Submission General process September 2011 ZTE CorporationSlide 4 broadcast setting is also feasible like via beacon

5 doc.: IEEE 802.11-11/1205r1 Submission September 2011 ZTE CorporationSlide 5 Considerations about mechanism (1/3) NameEvent Type Transition0 RSNA1 Peer-to-Peer Link2 WNM Log3 Battery Power Alarm4 Reserved 5 － 220 Vendor Specific221 Reserved 222 － 255 New We may reuse and extend IEEE 802.11v Event Request/Report management frame to carry such battery power alarm information

6 doc.: IEEE 802.11-11/1205r1 Submission September 2011 ZTE CorporationSlide 6 Considerations about mechanism (2/3) Battery Power Left Power Threshold Estimated Life Left Additional Information (Optional) Battery Power Alarm Event Report field example, as below: Battery Power Left (unit: mAH) Power Threshold (unit: mAH) Estimated Life Left (unit: Minutes): this value is provided by 11ah STA to the NMS for reference Additional Information (Optional): this domain is optional and vendor specific like location based information, which could contain enough necessary information and help NMS operator to locate the 11ah sensor which has reported the alarm. 2 bytes 3 bytesvariable

7 doc.: IEEE 802.11-11/1205r1 Submission Considerations about mechanism (3/3) STA capability on this mechanism could be communicated in advance, eg. when association It may take battery power alarm mechanism as a example when adding a new alarm type for 802.11ah system in addition to battery power alarm. QoS priority issue may be considered when designing IEEE 802.11v Event Report/Request for 802.11ah alarm report. 802.11ae 802.11v Event Report/Request belongs to WNM management frame; 802.11ae draft has defined the QoS priority of WNM management frame as AC_BE, but for the alarm reports, AC_BE may not be appropriate for management frame with alarm information. September 2011 ZTE CorporationSlide 7

8 doc.: IEEE 802.11-11/1205r1 Submission September 2011 ZTE CorporationSlide 8 References [1] Potential Compromise for 802.11ah Use Case Document, IEEE802.11-11/0457r0 [2] TGah functional requirements and evaluation methodology, IEEE802.11-11/0905r3 [3] Proposed Specification Framework for TGah, IEEE802.11-11/1137r0 [4] IEEE P802.11ae Draft 5.0

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