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Add pseudo-random advDelay when advertising #117

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dbrgn opened this issue Jun 5, 2020 · 2 comments
Open

Add pseudo-random advDelay when advertising #117

dbrgn opened this issue Jun 5, 2020 · 2 comments
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area: beacons Code Area: BLE beacon advertisement, scanning, and advertising data structures area: link layer Code Area: BLE Link Layer (establishing and maintaining connections, encryption, etc) type: enhancement A new feature or an improvement for an existing one

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@dbrgn
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dbrgn commented Jun 5, 2020

When advertising, a random delay (advDelay) between 0 ms and 10 ms should be added.

From the spec (4.4.2.2 Advertising Interval):

delay

This is probably blocked by #2.
@jonas-schievink jonas-schievink added type: enhancement A new feature or an improvement for an existing one area: beacons Code Area: BLE beacon advertisement, scanning, and advertising data structures area: link layer Code Area: BLE Link Layer (establishing and maintaining connections, encryption, etc) labels Jun 5, 2020
@trembel
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trembel commented Jun 6, 2020

Could this be related to #56?

@jonas-schievink
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@trembel Unlikely, the random delay just reduces collisions a bit. The iOS issue is more likely because we don't respect the inter-frame spacing when getting scanned.

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area: beacons Code Area: BLE beacon advertisement, scanning, and advertising data structures area: link layer Code Area: BLE Link Layer (establishing and maintaining connections, encryption, etc) type: enhancement A new feature or an improvement for an existing one
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@dbrgn @jonas-schievink @trembel