BT 5.2 Bluetooth LE AUDIO Market
Monga tonse tikudziwira, BT5.2 isanachitike, kufalitsa kwa ma audio kwa Bluetooth kunagwiritsa ntchito mawonekedwe apamwamba a Bluetooth A2DP potumiza deta. Tsopano kutuluka kwa audio yamphamvu yotsika LE Audio kwaphwanya ulamuliro wa Bluetooth wamakono pamsika wama audio. Pa 2020 CES, SIG idalengeza kuti mulingo watsopano wa BT5.2 umathandizira maulumikizidwe amtundu umodzi wa akapolo ambiri, monga mahedifoni a TWS, kulumikizana kwama audio m'zipinda zingapo, komanso kufalitsa ma data, komwe kumatha. azigwiritsidwa ntchito kwambiri m'zipinda zodikirira, malo ochitira masewera olimbitsa thupi, holo zamisonkhano, malo owonera makanema ndi malo ena okhala ndi zomvera pagulu.
BT 5.2 LE Audio kufala mfundo
Mbali ya Bluetooth LE Isochronous Channels ndi njira yatsopano yosamutsira deta pakati pa zipangizo pogwiritsa ntchito Bluetooth LE, yotchedwa LE Isochronous Channels. Imapereka njira ya algorithmic yowonetsetsa kuti zida zambiri zolandila zimalandira deta kuchokera kwa master synchronously. Protocol yake imanena kuti chimango chilichonse cha data chomwe chimatumizidwa ndi Bluetooth transmitter chizikhala ndi nthawi, ndipo zomwe zalandilidwa kuchokera ku chipangizocho pambuyo pa nthawiyo zidzatayidwa. Izi zikutanthauza kuti chipangizo cholandirira chimangolandira deta mkati mwa zenera lovomerezeka, motero zimatsimikizira kulumikizana kwa data yomwe idalandilidwa ndi zida zingapo za akapolo.
Kuti muzindikire ntchito yatsopanoyi, BT5.2 imawonjezera gawo la ISOAL synchronization adaptation (The Isochronous Adaptation Layer) pakati pa Protocol stack Controller ndi Host kuti apereke magawo amtundu wa data ndi kukonzanso ntchito.
BT5.2 synchronous data kutsatsira kutengera LE kugwirizana
Njira yolumikizira isochronous imagwiritsa ntchito njira yotumizira ya LE-CIS (LE Connected Isochronous Stream) kuti ithandizire kulumikizana kwapawiri. Pakutumiza kwa LE-CIS, mapaketi aliwonse omwe sanatumizidwe mkati mwazenera lanthawi yotchulidwa adzatayidwa. Kusakatula kwa data pa njira ya isochronous kumapereka kulumikizana kolumikizana pakati pa zida.
Magulu Olumikizidwa a Isochronous Groups (CIG) amatha kuthandizira kusanja kwa data kolumikizidwa ndi mbuye m'modzi ndi akapolo angapo. Gulu lirilonse likhoza kukhala ndi zochitika zingapo za CIS. Mkati mwa gulu, pa CIS iliyonse, pali ndondomeko yotumizira ndi kulandira nthawi, yotchedwa zochitika ndi zochitika zazing'ono.
Nthawi yochitika ya chochitika chilichonse, chotchedwa nthawi ya ISO, imatchulidwa munthawi ya 5ms mpaka 4s. Chochitika chilichonse chimagawidwa mu chimodzi kapena zingapo zazing'ono. Muzochitika zazing'ono potengera njira yotumizira ma data, wolandila (M) amatumiza kamodzi ndi akapolo akuyankha monga momwe zasonyezedwera.
BT5.2 yotengera kufalikira kolumikizana kwa mtsinje wa data wopanda kulumikizana
Kulankhulana kosagwirizana ndi njira yolumikizirana kumagwiritsa ntchito njira yotumizira mauthenga (BIS Broadcast Isochronous Streams) ndipo imathandizira kulumikizana kwanjira imodzi. Kuyanjanitsa kolandira kuyenera kumvetsera kaye data ya wolandila AUX_SYNC_IND, wailesiyi ili ndi gawo lotchedwa BIG Info, zomwe zili m'gawoli zigwiritsiridwa ntchito kugwirizanitsa ndi BIS yofunikira. Ulalo watsopano wa LEB-C wowongolera umagwiritsidwa ntchito pakuwongolera ulalo wa LL, monga kusintha kwa tchanelo, ndipo ulalo wolongosoka wa LE-S (STREAM) kapena LE-F (FRAME) udzagwiritsidwa ntchito pakuyenda kwa data ndi ogwiritsa ntchito. deta. Ubwino waukulu wa njira ya BIS ndikuti deta imatha kutumizidwa kwa olandila angapo molumikizana.
Mawonekedwe a Broadcast isochronous stream ndi gulu lamagulu amathandizira kutumizirana ma synchronous kwa mitsinje ya data yolandila ambiri osalumikizidwa. Zitha kuwoneka kuti kusiyana kwakukulu pakati pa izo ndi njira ya CIG ndikuti njirayi imangothandiza kulankhulana kwa njira imodzi.
Chidule cha zinthu zatsopano za BT5.2 LE AUDIO:
BT5.2 chowongolera chatsopano cha ISOAL chosinthira chosinthira kuti chithandizire kufalitsa kwa data ya LE AUDIO.
BT5.2 imathandizira kamangidwe katsopano kamayendedwe kuti athandizire kulumikizana kokhazikika komanso kosagwirizana.
Pali njira yatsopano ya LE Security Mode 3 yomwe imawulutsidwa potengera ndipo imalola kubisa kwa data kuti kugwiritsidwe ntchito m'magulu olumikizirana.
Wosanjikiza wa HCI amawonjezera malamulo angapo atsopano ndi zochitika zomwe zimalola kulumikizana kwa kasinthidwe kofunikira ndi kulumikizana.
Chosanjikiza cholumikizira chimawonjezera ma PDU atsopano, kuphatikiza ma PDU olumikizidwa ndi ma PDU olumikizirana. LL_CIS_REQ ndi LL_CIS_RSP amagwiritsidwa ntchito kupanga maulumikizidwe ndikuwongolera kayendedwe ka kalunzanitsidwe.
LE AUDIO imathandizira 1M, 2M, CODED angapo PHY mitengo.
