[Bluez-users] Improving Transmission Speeds

[Bluez-users] Improving Transmission Speeds

[Robert Rawlins]

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Hello Guys,
 
I'm running Bluez 3.12 and doing a little bit of file transfer over OBEX push and seem to get considerably lower transmission speeds than when i'm transmitting from my windows system using the windows stack. For instance, when transmitting a 40kb file from my linux system using bluez the file will take several seconds to transfer from acceptance of the invitation, however, when using the same hardware on my windows box, it will transfer almost immediately, with no noticeable delay, this speed difference becomes even more apparent when dealing with larger files.
 
I'm sure i've read in the past this is quite common when using the linux stacks, is that right? is there any way to make a marked improvement? I'm running bluetooth 2 with EDR capabilities, on a CSR chip.
 
Thanks guys,
 
Rob
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Re: [Bluez-users] Improving Transmission Speeds

[siddhant tewari]

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hi Robert,
                I have had similar experience too .. I want to add one more
point :-

There is a difference in transfer rates while transfer a file between phone
and PC between when i am simply making obex push of the file and when i am
transferring files after pairing up the device.

Is the above behavior expected. I feel that this should happen but a
confirmation from more experienced people will give more confidence.

regards
siddhant

On 8/20/07, Robert Rawlins <robert_rawlins@hotmail.com> wrote:
>
> Hello Guys,
>
> I'm running Bluez 3.12 and doing a little bit of file transfer over OBEX
> push and seem to get considerably lower transmission speeds than when i'm
> transmitting from my windows system using the windows stack. For instance,
> when transmitting a 40kb file from my linux system using bluez the file will
> take several seconds to transfer from acceptance of the invitation, however,
> when using the same hardware on my windows box, it will transfer almost
> immediately, with no noticeable delay, this speed difference becomes even
> more apparent when dealing with larger files.
>
> I'm sure i've read in the past this is quite common when using the linux
> stacks, is that right? is there any way to make a marked improvement? I'm
> running bluetooth 2 with EDR capabilities, on a CSR chip.
>
> Thanks guys,
>
> Rob
>
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> https://lists.sourceforge.net/lists/listinfo/bluez-users
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>

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Re: [Bluez-users] Improving Transmission Speeds

[Loreno Oliveira]

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I believe that you also need a 2.6.22 kernel for using the EDR capabilities
of your dongle.

Regards,

Loreno

On 8/20/07, Robert Rawlins <robert_rawlins@hotmail.com> wrote:
>
> Hello Guys,
>
> I'm running Bluez 3.12 and doing a little bit of file transfer over OBEX
> push and seem to get considerably lower transmission speeds than when i'm
> transmitting from my windows system using the windows stack. For instance,
> when transmitting a 40kb file from my linux system using bluez the file will
> take several seconds to transfer from acceptance of the invitation, however,
> when using the same hardware on my windows box, it will transfer almost
> immediately, with no noticeable delay, this speed difference becomes even
> more apparent when dealing with larger files.
>
> I'm sure i've read in the past this is quite common when using the linux
> stacks, is that right? is there any way to make a marked improvement? I'm
> running bluetooth 2 with EDR capabilities, on a CSR chip.
>
> Thanks guys,
>
> Rob
>
> ------------------------------
> Are you the Quizmaster? Play BrainBattle with a friend now!
> <http://specials.uk.msn.com/brainbattle>
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Splunk Inc.
> Still grepping through log files to find problems?  Stop.
> Now Search log events and configuration files using AJAX and a browser.
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> _______________________________________________
> Bluez-users mailing list
> Bluez-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bluez-users
>
>

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Re: [Bluez-users] Improving Transmission Speeds

[Robert Rawlins]

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Thanks for the suggestion about the kernel upgrade.
 
I did run 2.6.22 a while back as I know that boasted the full 2.0 EDR spec support, however I didn't really notice any difference in the performance at all. Is there anything additional I would have to do with the system to get EDR support turned on?
 
Thanks guys,
 
Rob
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Re: [Bluez-users] Improving Transmission Speeds

[Marcel Holtmann]

Hi Robert,

> I did run 2.6.22 a while back as I know that boasted the full 2.0 EDR
> spec support, however I didn't really notice any difference in the
> performance at all. Is there anything additional I would have to do
> with the system to get EDR support turned on?

if you don't mess around with hcid.conf or other commands, then EDR is
on by default.

Regards

Marcel



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