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Post by Akhil Kumar on May 1, 2013 5:28:01 GMT
Which part of BLE protocol gives the channel index information? Why are advertising channels not given adjacent frequencies in the band?
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srishtansh
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can contact me at : srishtanshp@nanopowercommunications.com
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Post by srishtansh on May 2, 2013 9:14:05 GMT
Which part of BLE protocol gives the channel index information? Why are advertising channels not given adjacent frequencies in the band? Adjacent frequencies are not given because of ICI (Inter-Channel-Interference) just like ISI. Your first question is not specific . This information you will find in Link Layer. Could you please be lilttle more specific in your first part of question. Attachments:image.odt (82.74 KB)
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srishtansh
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can contact me at : srishtanshp@nanopowercommunications.com
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Post by srishtansh on May 2, 2013 9:17:31 GMT
If you are talking about how data channel selection is done then there hardware ways of doing this also like having a DCS (Data Channel Selection) with a specific protocol.....
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Post by Akhil Kumar on May 2, 2013 9:55:47 GMT
Which part of BLE protocol gives the channel index information? Why are advertising channels not given adjacent frequencies in the band? Adjacent frequencies are not given because of ICI (Inter-Channel-Interference) just like ISI. Your first question is not specific . This information you will find in Link Layer. Could you please be lilttle more specific in your first part of question. You are saying that reason of not assigning the adjacent frequencies to advertising channels is inter-channel interference, as data channels are adjacent to each other like which if I assign frequency to advertising channels it will create ICI on advertising channels, will the adjacent data channels will not create ICI? My first question is, will the channel map/index for one BLE device remain constant? |
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srishtansh
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can contact me at : srishtanshp@nanopowercommunications.com
Posts: 33
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Post by srishtansh on May 9, 2013 3:53:48 GMT
Adjacent frequencies are not given because of ICI (Inter-Channel-Interference) just like ISI. Your first question is not specific . This information you will find in Link Layer. Could you please be lilttle more specific in your first part of question. You are saying that reason of not assigning the adjacent frequencies to advertising channels is inter-channel interference, as data channels are adjacent to each other like which if I assign frequency to advertising channels it will create ICI on advertising channels, will the adjacent data channels will not create ICI? My first question is, will the channel map/index for one BLE device remain constant? "Advertising channels are allocated in different parts of the spectrum to provide immunity against interference from 802.11/Wi-Fi " - you can refer the link : www.eetimes.com/design/communications-design/4217866/Bluetooth-4-0--An-introduction-to-Bluetooth-Low-Energy-Part-IRegarding the data channels I am not pretty sure but in my notion it does not make any difference as data channel PDU has MIC or other fields like address etc. init so interference will not affect it. |
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srishtansh
New Member
can contact me at : srishtanshp@nanopowercommunications.com
Posts: 33
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Post by srishtansh on May 9, 2013 5:52:08 GMT
Adjacent frequencies are not given because of ICI (Inter-Channel-Interference) just like ISI. Your first question is not specific . This information you will find in Link Layer. Could you please be lilttle more specific in your first part of question. You are saying that reason of not assigning the adjacent frequencies to advertising channels is inter-channel interference, as data channels are adjacent to each other like which if I assign frequency to advertising channels it will create ICI on advertising channels, will the adjacent data channels will not create ICI? My first question is, will the channel map/index for one BLE device remain constant? Channel index for one time communication or transfer will remain same for a BLE device...........suppose a mater is connected to two slaves slave1 and slave2 but it can communicate with one slave at a time suppose slave1 then during communication with slave1 it can not change its assigned channel index but after it finishes communication with slave1 it can assign same channel index to slave2 for communication. |
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Post by akasidhenoba on Dec 27, 2019 13:57:42 GMT
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Post by imeofoqugepco on Dec 27, 2019 14:37:00 GMT
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