January, 2001

Tod Sizer, Lucent Technologies / Bell Laboratories

Slide 1

doc.: IEEE 802.15-01/031r0

Submission

Bluetooth SIGCoexistence Working Group

Liaison Report

January, 2001

Tod Sizer, Lucent Technologies / Bell Laboratories

Slide 2

doc.: IEEE 802.15-01/031r0

Submission

Bluetooth SIGCoexistence Working Group

• Coexistence Working Group Charter• IEEE/Bluetooth SIG Coordination• Live Testing • Finalizing simulations • Adaptive Hopping

January, 2001

Tod Sizer, Lucent Technologies / Bell Laboratories

Slide 3

doc.: IEEE 802.15-01/031r0

Submission

Coexistence Working Group Charter Work within the Bluetooth™ community as well as with cross industry groups

(e.g. IEEE) to quantify the detrimental effects which Bluetooth™ and other wireless products will have on the performance of both. This information will be imperative for members of the Bluetooth community to advise their customers of the realistic performance one can expect in different environments as well a build products which span between Bluetooth™ and other wireless products. In addition, it will be used to disseminate SIG sponsored information on issues of coexistence to regulatory bodies.

Develop methods of Bluetooth™ operation that will be used to improve coexistence between systems in the shared radio band. These will be issued as Best Practices white papers, improvements to the Bluetooth™ specifications, or formal profiles as necessary.

To work closely with the Radio 2.0 Working Group to evaluate coexistence issues in new proposed radio designs.

January, 2001

Tod Sizer, Lucent Technologies / Bell Laboratories

Slide 4

doc.: IEEE 802.15-01/031r0

Submission

IEEE 802.15 TG2/ Bluetooth SIG Coexistence Working Group

Coordination

• Would like to work with the IEEE on how best to work together and avoid duplication of efforts. – MAC layer simulations – Comparison of live and simulation results

• Steve Shellhammer and Tod Sizer are currently acting as liaisons between the two groups.

January, 2001

Tod Sizer, Lucent Technologies / Bell Laboratories

Slide 5

doc.: IEEE 802.15-01/031r0

Submission

Live Testing

• Started to perform quantitative studies of Coexistence of Bluetooth with other interferers.

• Emphasis is on quantitative packet error rate performance in specific interference scenarios. – Bluetooth v.s. Bluetooth – Bluetooth v.s. 802.11b – Bluetooth v.s. 2.4 GHz DECT Cordless

Phones

January, 2001

Tod Sizer, Lucent Technologies / Bell Laboratories

Slide 6

doc.: IEEE 802.15-01/031r0

Submission

Live Testing• Because of some limitations in the equipment

to this point several of the experiments could not be completed. Hope to report the complete results at the next IEEE meeting.

• Additional interferers to test are:– HomeRF– Microwave Ovens– Other 2.4 GHz Cordless products.

• Suggestions as to interferers we should address beyond these?

January, 2001

Tod Sizer, Lucent Technologies / Bell Laboratories

Slide 7

doc.: IEEE 802.15-01/031r0

Submission

Finalizing Simulations• Packet Error Rate simulations have been

performed for:– Bluetooth – 802.11b– HomeRF– WBFH– DECT (in progress)– Microwave Ovens (in progress)

• Results were presented at the Tampa meeting.• Now looking to compare these simulations with

live testing and develop White Paper to aid deployment of Bluetooth.

January, 2001

Tod Sizer, Lucent Technologies / Bell Laboratories

Slide 8

doc.: IEEE 802.15-01/031r0

Submission

Adaptive Hopping to Avoid Interference

• When no interference is detected, hop over the entire frequency band.

• When interference is detected at a level which will cause packet errors to Bluetooth, actively avoid these frequency hop locations.

• This technique is currently legal for Type 3 Bluetooth units.

2.4 GHz ISM Band Static Interferer

Bluetooth 1.0

Adaptive Hopping

January, 2001

Tod Sizer, Lucent Technologies / Bell Laboratories

Slide 9

doc.: IEEE 802.15-01/031r0

Submission

Adaptive Hopping to Avoid Interference

• The use of intelligence to avoid interference is legal at all powers, however, the required number of hop locations must be maintained.

• The Coexistence Working Group feels that adaptive hopping shows great promise in improving the performance of Bluetooth as a Coexistence Mechanism.

January, 2001

Tod Sizer, Lucent Technologies / Bell Laboratories

Slide 10

doc.: IEEE 802.15-01/031r0

Submission

Adaptive Hopping

• Continuing to have discussions on defining the details surrounding Adaptive Hopping.

• Apprised the FCC as to our thoughts on this issue.

• Obtained FCC support to continue to work towards consensus on this issue.

• Would welcome any thoughts and suggestions on this issue from the IEEE 802.15.2 group.