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EVDO Rev 0 Vs Rev A

 
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WWAN Fan
EVDO Newbie


Joined: 19 Mar 2008
Posts: 2
PostPosted: Wed Mar 19, 2008 1:12 pm    Post subject: EVDO Rev 0 Vs Rev A Reply with quote
Hello Everone,

I have a question for all of you and I sure appreciate all and any responses.

Does a device that has an EVDO Rev A radio use more power when connected to a CDMA infrastructure vs the same type of device using a Rev 0 radio. The answer of yes would seem logical to me since you are now using more bandwidth from the radio that is capable of higher speed bursts.

Thanks

WWAN Fan
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Mackieman
EVDO Junkie


Joined: 31 Oct 2005
Posts: 440
PostPosted: Wed Mar 19, 2008 1:53 pm    Post subject: Re: EVDO Rev 0 Vs Rev A Reply with quote
WWAN Fan wrote:
Does a device that has an EVDO Rev A radio use more power when connected to a CDMA infrastructure vs the same type of device using a Rev 0 radio. The answer of yes would seem logical to me since you are now using more bandwidth from the radio that is capable of higher speed bursts.


Generally, the answer is no. This will vary from one device manufacturer to another but for the most part, there is no difference in power usage between Rev. 0 and Rev. A.

The key difference between the two is how the CDMA channel is structured for the data call modulation. Rev. A is more efficient than Rev. 0 leading to higher overall throughput on both the forward (download) and reverse (upload) links. Rev. A also employs some QoS algorithms to help with latency and some applications. Thus, the same physical connection is made but the method in which what connection is propagated changes between Rev. 0 and Rev. A, meaning that there is no difference in power required. The difference is in the Qualcomm chipset used; some support Rev. 0 and others support Rev. A. As you can see, this is why Rev. 0 cards do not support Rev. A networks but Rev. A cards are compatible with Rev. 0 networks. It's all about the chipset and the supporting software used to run it.

There is a mind-numbing amount of information about this subject at Wikipedia, located here.
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WWAN Fan
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Joined: 19 Mar 2008
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PostPosted: Thu Mar 20, 2008 10:35 am    Post subject: Reply with quote
Thank you for your answer and all of the information you provided.
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