Slide 1 SEPT doc.: c Submission Clint Powell, Kuor-Hsin Chang - Freescale, Inc. Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Combined Battery Life Comparisons] Date Submitted: [Sept. 18, 2006 ] Source: [Clint Powell, Kuor-Hsin Chang] Company: [Freescale Semiconductor] Address: [2100 E. Elliot Rd, MD: EL542, Tempe, AZ 85284, USA] Voice:[ , ], kuor- Re: [ IEEE SG4c ] Abstract:[Representative Battery Life Comparisons for Different Use Scenarios] Purpose:[To encourage discussion.] Notice:This document has been prepared to assist the IEEE P It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release:The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P

Slide 2 SEPT doc.: c Submission Clint Powell, Kuor-Hsin Chang - Freescale, Inc. Application Scenario 1 1.Device wakes up 2.Device Transitions to Receive Mode 3.Device Performs one CCA ( assume the channel is clear) 4.Device Transitions to Transmit Mode 5.Device Transmits a Packet 6.Device Transitions to Receive Mode 7.Device Receives an Acknowledge 8.Assuming the Acknowledge is received, the device goes back to sleep

Slide 3 SEPT doc.: c Submission Clint Powell, Kuor-Hsin Chang - Freescale, Inc. Battery Capacity = 2000 mAH Battery Self Leakage: 0.2% to 0.5% per month Length of the Event: 4ms (single attempt) Active current: 25mA Sleep mode current: 2uA (The channel is clear, i.e. TRX does one CCA) BSL=0.2% BSL=0.5%

Slide 4 SEPT doc.: c Submission Clint Powell, Kuor-Hsin Chang - Freescale, Inc. Application Scenario 2 1.Device wakes up 2.Device Transitions to Receive Mode 3.Device Performs one CCA ( assume the channel is clear) 4.Device Transitions to Transmit Mode 5.Device Transmits a Packet 6.Device Transitions to Receive Mode 7.Device Receives an Acknowledge 8.If the Acknowledge is not received, the device goes back to step 3 9.If the Acknowledge is received, the device goes back to sleep

Slide 5 SEPT doc.: c Submission Clint Powell, Kuor-Hsin Chang - Freescale, Inc. Battery Capacity = 2000 mAH Battery Self Leakage: 0.5% per month Length of the Event: 4ms (single attempts), 7ms (three attempts) Active current: 25mA Sleep mode current: 2uA (The channel is clear, i.e. TRX does one CCA) Single Attempt Three Attempts

Slide 6 SEPT doc.: c Submission Clint Powell, Kuor-Hsin Chang - Freescale, Inc. 1.Device wakes up 2.Device Transitions to Receive Mode 3.Device Performs one CCA (Channel is not clear, CCA repeated 2 additional times) 4.Device Transitions to Transmit Mode 5.Device Transmits a Packet 6.Device Transitions to Receive Mode 7.Device Receives an Acknowledge 8.Assuming the Acknowledge is received, the device goes back to sleep Application Scenario 3

Slide 7 SEPT doc.: c Submission Clint Powell, Kuor-Hsin Chang - Freescale, Inc. Battery Capacity = 2000 mAH Battery Self Leakage: 0.5% per month Length of the Event: 4ms (single attempt) Active current: 25mA Sleep mode current: 2uA (The channel is not clear, i.e. TRX does one or three CCA per attempt) Single CCA/attempt Three CCA/attempt

Slide 8 SEPT doc.: c Submission Clint Powell, Kuor-Hsin Chang - Freescale, Inc. Application Scenario 4 Device Wake up to Poll Coordinator (No data from Coordinator) 1.Device wakes up 2.Device Transitions to Receive Mode 3.Device Performs one CCA 4.Device Transitions to Transmit Mode 5.Device Transmits a Poll packet 6.Device Transitions to Receive Mode 7.Device Receives an No_Data Acknowledge 8.Assuming the Acknowledge is received, goes back to sleep

Slide 9 SEPT doc.: c Submission Clint Powell, Kuor-Hsin Chang - Freescale, Inc. Application Scenario 5 Device Wake up to Poll Coordinator (Have data from Coordinator) 1.Device wakes up 2.Device Transitions to Receive Mode 3.Device Performs one CCA 4.Device Transitions to Transmit Mode 5.Device Transmits a Poll packet 6.Device Transitions to Receive Mode 7.Device Receives an Acknowledgement with data available 8.Wait 192us 9.Receive the data packet from coordinator 10.Device Transitions to Transmit Mode 11.Device Transmits an acknowledgement

Slide 10 SEPT doc.: c Submission Clint Powell, Kuor-Hsin Chang - Freescale, Inc. Battery Capacity = 2000 mAH Battery Self Leakage: 0.5% per month Length of the Event: 6.3ms to 7.2 ms Active current: 25mA Sleep mode current: 2uA (The channel is clear, i.e. TRX does one CCA per attempt) 10% of the time there is data 20% of the time there is data