Hi Claudio and Marcel, On 07/25/2011 03:46 PM, ext Claudio Takahasi wrote:
BTW, I think we need to align BR and LE. Proximity and Thermometer Profiles also have recommended parameters for fast connection(first 30sec) and 2 reduced power options. Both profiles use the same configuration. If we add a new command to control page/connection parameters it needs to be aligned with BR and LE and if possible avoiding transport specific parameters. BR, Claudio
This issue was discussed in the IRC. It seem that for LE, fast connection is needed only on the initiator side for outgoing connections (LE scan/connection establishment parameters), since 4.0 spec forbids LE connections between dual mode devices. So fast connectable mode on the LE acceptor side would be only used for testing purposes, or if spec is changed, or if single mode hw is supported in the future.
For BR/EDR, as Dmitriy explained, the fast connectable use case is to make headset to be able to connect faster when there is an incoming call (user switches headset on when call is alerting). It's an enhancement for headset connection time and usability.
It is currently implemented in hciops by changing page scan settings while incoming call is alerting. HCI commands Write Page Scan Activity and Write Page Scan Type are used to change page scan type from standard to interlaced and interval 1.28 s => 22.5 ms. This makes the incoming connection about 1 s faster. Settings are changed only for a short time to minimize impact on power consumption.
In my opinion BR and LE cases are quite different, so I think it would make sense to keep these separate and not to put them in one mgmt command. Could we just add a generic mgmt command for setting BR page scan parameters, for example "Set Page Scan Parameters Command" which would take parameters type (standard or interlaced), interval, and window?
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