Bluetooth Low Energyの海に潜る / Dive to Bluetooth Low Energy

2025年11月16日(日)に開催された低レイヤーズさっぽろの発表資料 https://low-layers-sapporo.connpass.com/event/371754/

Transcript

1. Bluetooth Low Energyの海に潜る ௿ϨΠϠʔζͬ͞ΆΖ #3 -ळ- @yumu19 / @yumulab 2025.11.16 ౬ଜ ཌྷ MPX@MBZFST@TBQQPSP
2. w ౬ଜ
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   w ઐ໳͸৘ใՊֶɺಛʹΠϯλϑΣʔεɺηϯγϯάɺ*P5ɺ73ɺωοτϫʔΫ౳
   w ܦྺ
   w ࡳຈ։੒ߴ౳ֶߍ
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   ஍ٿ࿭੕Պֶઐ߈
   म࢜՝ఔ
   w ๺཮ઌ୺Պֶٕज़େֶӃେֶ
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   w 
   Ϋ΢δοτגࣜձࣾʢ԰಺ଌҐΞϓϦɺΠϯλϥΫςΟϒలࣔͷ։ൃɾ1.ͳͲʣ
   w 
   ϑϦʔϥϯεΤϯδχΞɾ߹ಉձࣾ1IZT7JT
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   ࠃཱݚڀ։ൃ๏ਓ৘ใ௨৴ݚڀػߏʢωοτϫʔΫςετϕουɺແઢωοτϫʔΫΤϛϡϨʔλͷ ݚڀͳͲʣ ࣗݾ঺հ 
3. ࠷ۙͷݚڀ
   θϛֶੜ  MobiEPSɿਓͷҠಈΛ௨৴ഔհͱ ͢ΔిࢠϖʔύʔαΠωʔδ Ҡಈͱձ࿩Λߦ͏ VRChat޲͚AIΞόλʔ ASSADEPɿASMR͔͖ࣖಈըͷͨΊ ͷԻͱ৮֮ͷಉ࣌ఏࣔγεςϜ LLMʹΑΔόΠΫ࿏໘ঢ়گਪఆ BLEΛ׆༻ͨ͠ ෺ཧੈք-ήʔϜ಺࿈ܞػߏ ϦϯࢎೋਫૉΞϯϞχ΢Ϝ݁থͷ ίϯϐϡςʔγϣφϧσβΠϯ
4. ࠓ೔ͷ಺༰ w #MVFUPPUI
   -PX
   &OFSHZʹ͍ͭͯ
   w #MVFUPPUIͱ#MVFUPPUI
   -PX
   &OFSHZ
   w ΞυόλΠζ
   w Ϗʔίϯ
   w ੲͭͬͨ͘#MVFUPPUI
   -PX
   &OFSHZΤϛϡϨʔλͷ࿩
   w #MVNPPO
   w "0,#",0 
5. #MVFUPPUIʹ͍ͭͯ w ແઢ௨৴ن֨
   w εϚϗͱपลػثͷ઀ଓʹ΋ͬͱ΋ Α͘࢖ΘΕΔ
   w ͳΜͰ#MVF ੨
   UPPUI ࣃ ʁ
   w ੈلͷσϯϚʔΫԦ
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   (PSNTTPO
   ͷ௨শʢ༝དྷ͸ෆ໌ʣ
   w σϯϚʔΫͱϊϧ΢ΣʔΛ౷Ұ
   w ʮແઢٕज़Λ౷Ұ͍ͨ͠ʯͱ͍͏૝͍Λ ࠐΊ໋໊ͯ  ը૾͸ʮGuide to the radio layer of Bluetooth TechnologyʯΑΓҾ༻ https://www.embien.com/blog/guide-to-the-radio-layer-of-bluetooth-technology
6. #MVFUPPUIʹ͍ͭͯ w #MVFUPPUIͷن֨ͷதʹ͸#MVFUPPUI
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   #MVFUPPUI
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   w #MVFUPPUI
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   w 9Ҏલͱಉ౳
   w #-&ͱ۠ผ͢ΔͨΊʹͦ͏ݺ͹ΕΔ
   w #MVFUPPUI
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   w ௿ফඅిྗ
   w #MVFUPPUI
   
   ೥
   ͔Βొ৔  ը૾͸ʮBluetooth 5.0͸ɺԿͰ΋Ͱ͖Δʯ͸େ͖ͳצҧ͍ | גࣜձࣾϜηϯίωΫτʯΑΓҾ༻ https://www.musen-connect.co.jp/blog/course/trial-production/bluetooth5-2/
7. #MVFUPPUI
   -PX
   &OFSHZ w ηϯτϥϧɿத৺ػثʢεϚϗ౳ʣ
   w ϖϦϑΣϥϧɿपลػث
   w ϖϦϑΣϥϧ͸ɺΞυόλΠζΛఆظతʹϒϩʔυΩϟετʢ߲࣍ʣ  ը૾͸ʮBluetooth ͱ͸Կ͔ʁୈ2ճ [શ3ճ] Bluetooth ClassicͱBluetooth Low EnergyʢBLEʣͷҧ͍ | ౦ࣳ৘ใγεςϜגࣜձࣾʯΑΓҾ༻ https://www.tjsys.co.jp/focuson/clme-bluetooth/bt-difference.htm
8. ΞυόλΠζ w ΞυόλΠζ
   "EWFSUJTF ɿϖϦϑΣϥϧ͕ࣗ਎ͷଘࡏΛप஌͢ΔͨΊʹ ఆظతʹϒϩʔυΩϟετ  Central Peripheral ADV_NONCONN_IND ʢεΩϟϯෆՄΞυόλΠζʣ ADV_IND ʢ઀ଓՄΞυόλΠζʣ CONNECT_REQ (઀ଓཁٻ) Data Packet Data Packet ίωΫγϣϯཱ֬ͷͨΊ Central Peripheral ϖϦϑΣϥϧ͔Βͷσʔλૹ৴ ʮ#-&ϏʔίϯʯͳͲͱ΋ݺ͹ΕΔ
9. ΞυόλΠζ w ʢ௿ϨΠϠʔζษڧձͳͷͰʣϑϨʔϜߏ଄ͷ࿩  ͜͜ʹMACΞυϨε͕ೖΔ ͜͜ʹΞϓϦέʔγϣϯͰ༻͍Δ஋͕ೖΔ (iBeaconͷUUIDɺEddystoneͷURL౳) Ϗʔίϯ͸͜Εˠ
10. #-&ϏʔίϯʹΑΔ԰಺ଌҐ w ԰಺ଌҐ
    w ԰֎͸(/44ଌҐ͕Մೳ
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    w 8J'J
    w *.&4
    w ௒Ի೾ʢඇՄௌԻʣ
    w Մࢹޫ௨৴
    w #-& 
11. 4UBUJPO
    /BWJ w ࡳຈӺपลͷ԰಺ଌҐ 
12. Ծ૝؀ڥΛ࢖ͬͨςετ؀ڥͷఏҊ w #MVFUPPUI
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    ʹؔ͢ΔݚڀࣄྫΛ঺հ
    w #MV.PPO
    -JOVY༻#-&ΤϛϡϨʔλ
    w "0#",0
    #-&ϏʔίϯΞϓϦέʔγϣϯͷݕূγεςϜ
    w #-&
    ػثؒ઀ଓ εϚϗपลػث ɺ԰಺ଌҐͳͲʹ࢖ΘΕΔ  https://www.bluetooth.com/what-is-bluetooth-technology/how-it-works
13. #MV.PPO֓ཁ w #MVFUPPUI
    -PX
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    #-& ͷϑϨʔϜΛ6%1*1&UIFSOFUʹࡌͤͯ ௨৴͢ΔΤϛϡϨʔλ
    w 1$ΫϥελͰ௨৴࣮ݧՄೳ
    w Ծ૝ϚγϯͰ௨৴࣮ݧՄೳ
    w ԕִ஍Ͱ௨৴࣮ݧՄೳ
    w -JOVY্Ͱ#MVFUPPUIΠϯλϑΣʔεͱͯ͠ݟ͑Δ
    w ి೾ड৴ڧ౓ 344 ͸ʁ
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    w ి೾ׯব͸ʁ
    ˠ
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14. #MV.PPO
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    w "QQMJDBUJPO
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    w )PTU$POUSPMMFSؒ͸)PTU$POUSPMMFS
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    w ίϯτϩʔϥΛ-JOVYΞϓϦέʔγϣϯͱ࣮ͯ͠૷  ͜͜ΛLinuxΞϓϦέʔγϣϯʹஔ͖׵͑Δ
15. #MV.PPO
    ಈ࡞σϞ w ϩʔΧϧϗετ #MVFUPPUIΠϯλϑΣʔεແ͠ ʹ#MVFUPPUIύέοτ Ξ υόλΠζ Λ஫ೖ 
16. #MV.PPO
    ઃܭͱ࣮૷ w Φʔϓϯιʔε-JOVY
    #MVFUPPUIελοΫ#MVF;Λݩʹ࣮૷
    w Ծ૝ΠϯλϑΣʔε͔Β௨৴Ͱ͖ΔΑ͏վม
    w ػثؒ௨৴͸6%1σʔλάϥϜʹωοτϫʔΫԾ૝ԽϑΥʔϚοτΛ಺แ
    w ΤϛϡϨʔγϣϯʹඞཁͳ৘ใ DI 5Y1PXFS -PDBUJPO Λϔομʹ֨ೲ 
17. #MV.PPO
    ड৴ి೾ڧ౓ͷ໛฿ w ϊʔυͷҐஔΛܾΊͯڑ཭ʹԠͯ͡ݮਰ
    w ࣮ࡍͷ఻ൖɾݮਰ͸ෳࡶ ਤ ͕ͩɺ͜͜Ͱ͸୯७ͳϞσϧ
    w ࣗ༝ۭؒి೾఻೻ଛࣦ
    
    Ճࢉੑന৭Ψ΢εࡶԻ "8(/  • AWGN(δ)͸ҎԼͷ֬཰ີ౓ؔ਺͔Βཚ୒ Neburka et al., Study of the Performance of RSSI based Bluetooth Smart Indoor Positioning (2016)
18. #MV.PPO
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    ˠ
    ϑϨʔϜΛഁغ  Faragher and Harle, Location FingerprintingWith Bluetooth Low Energy Beacons
19. #MV.PPO
    ൺֱ࣮ݧ w ࣮؀ڥͱΤϛϡϨʔγϣϯͷൺֱ 
20. "0#",0֓ཁ w #-&Ϗʔίϯར༻ΞϓϦέʔγϣϯͷݕূγεςϜ
    w ശͷ্ʹ୺຤Λஔ͚ͩ͘Ͱ#-&ΞϓϦέʔγϣϯΛ༷ʑͳ৚݅Ͱݕূ͢Δ ͜ͱ͕Ͱ͖Δ 
21. "0#",0
    ݕূ؀ڥ w ಺෦ʹ͸Ϗʔίϯൃ৴ػͱͯ͠3BTQCFSSZ
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    w ୆ͷ3BTQCFSSZ
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    w ҐஔΛ࠶ݱ͢ΔͨΊʹϏʔίϯͷϔομͷૹ৴ిྗ஋Λॻ͖׵͑
    w ࣮ࡍ͸͔ۙ͘ΒͷϏʔίϯ͕ͩɺԕ͔͘ΒඈΜͰ͖ͨΑ͏ʹݟ͔͚ͤΔ 
22. "0#",0
    ৚݅ઃఆΠϯλϑΣʔε w Ϗʔίϯૹ৴ػͱड৴ػͷҐஔΛࢦఆ
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23. "0#",0
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24. "0#",0
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    w ళฮ΍ࣗಈൢചػͷདྷళݕ஌
    w ത෺ؗφϏήʔγϣϯΞϓϦ  ౦ژࠃཱത෺ؗ - ΞϓϦʮτʔϋΫͳͼʯ • ݕূ͕େม • ϏʔίϯઃஔޙͷҐஔมߋ͕ࠔ೉ • ΞϓϦέʔγϣϯ୺຤Λ࣋ͬͯา͖ճΔ • → ص্ݕূΛՄೳʹ
25. ͓ΘΓʹ w ৄࡉʹڵຯ͋Δํ͸ത࢜࿦จΛ͝ཡ͍ͩ͘͞
    w ʮ౬ଜ
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26. એ఻