I-BT 5.2 I-Bluetooth LE AUDIO Market
Njengoba sonke sazi, ngaphambi kwe-BT5.2, ukudluliswa komsindo we-Bluetooth kwasebenzisa imodi yakudala ye-Bluetooth A2DP ekudluliseleni idatha yephoyinti nephoyinti. Manje ukuvela komsindo wamandla aphansi LE Audio kwephule ukubusa kwe-Bluetooth yakudala emakethe yomsindo. Ngo-2020 CES, i-SIG yamemezela ngokusemthethweni ukuthi izinga elisha le-BT5.2 lisekela izinhlelo zokusebenza zokusakazwa komsindo ezisekelwe ekuxhumekeni kwenkosi eyodwa, njengamahedfoni e-TWS, ukuvumelanisa okulalelwayo okunamagumbi amaningi, kanye nokusakaza okusekelwe ekusakazweni kwedatha, okungase. zisetshenziswe kabanzi emakamelweni okulinda, izindawo zokuzivocavoca, amahholo enkomfa, amasinema nezinye izindawo ezinokwamukela umsindo wesikrini somphakathi.
I-BT 5.2 LE Umgomo wokudlulisa umsindo
Isici se-Bluetooth LE Isochronous Channels siyindlela entsha yokudlulisa idatha phakathi kwamadivayisi kusetshenziswa i-Bluetooth LE, ebizwa ngokuthi i-LE Isochronous Channels. Inikeza indlela ye-algorithmic yokuqinisekisa ukuthi amadivaysi amaningi owamukelayo athola idatha evela ku-master synchronously. Iphrothokholi yayo ibeka ukuthi ifreyimu ngayinye yedatha ethunyelwa isidluliseli se-Bluetooth izoba nesikhathi, futhi idatha etholwe kusukela kudivayisi ngemva kwesikhathi izolahlwa. Lokhu kusho ukuthi idivayisi yomamukeli ithola idatha kuphela ngaphakathi kwewindi lesikhathi elivumelekile, ngaleyo ndlela iqinisekisa ukuvumelanisa idatha etholwe amadivayisi amaningi ezinceku.
Ukuze ubone lo msebenzi omusha, i-BT5.2 yengeza isendlalelo sokuvumelanisa sokuvumelanisa se-ISOAL (I-Isochronous Adaptation Layer) phakathi kwesilawuli sesitaki sephrothokholi kanye noMsingathi ukuze kuhlinzekwe ngesegimenti yokusakaza idatha kanye nezinsizakalo zokuhlela kabusha.
Ukusakaza-bukhoma kwedatha ye-BT5.2 okusekelwe ekuxhumekeni kwe-LE
Isiteshi se-isochronous esigxile ekuxhumekeni sisebenzisa indlela yokudlulisa i-LE-CIS (LE Connected Isochronous Stream) ukuze sisekele ukuxhumana okukabili. Ekudluliselweni kwe-LE-CIS, noma yimaphi amaphakethe angathunyelwanga phakathi newindi lesikhathi esishiwo azolahlwa. Ukusakazwa kwedatha yesiteshi ye-isochronous okugxile ekuxhumekeni kunikeza ukuxhumana okuvumelanayo kwephoyinti nephoyinti phakathi kwamadivayisi.
Imodi ye-Connected Isochronous Groups (CIG) ingasekela ukusakazwa kwedatha okuxhumeke kaningi ngenkosi eyodwa nezigqila eziningi. Iqembu ngalinye lingaqukatha izimo ze-CIS eziningi. Ngaphakathi kweqembu, ku-CIS ngayinye, kuneshejuli yokudlulisa nokwamukela izikhala zesikhathi, ezibizwa ngemicimbi kanye nemicimbi emincane.
Isikhawu sokwenzeka somcimbi ngamunye, esibizwa ngokuthi isikhawu se-ISO, sicaciswa ebangeni lesikhathi lika-5ms kuya ku-4s. Umcimbi ngamunye uhlukaniswe waba umcimbi omncane owodwa noma ngaphezulu. Emcimbini omncane osuselwe kumodi yokuvumelanisa yokusakaza kwedatha, umsingathi (M) uthumela kanye nezigqila ziphendula njengoba kubonisiwe.
I-BT5.2 esekelwe ekudluliselweni okuvumelanayo kokusakazwa kokusakaza kwedatha okungaxhumekile
Ukuxhumana okungaxhunyiwe ku-inthanethi kusebenzisa indlela yokusakaza yokuvumelanisa (BIS Broadcast Isochronous Streams) futhi isekela kuphela ukuxhumana kwendlela eyodwa. Ukuvumelanisa umamukeli kudinga kuqala ukulalela umsingathi we-AUX_SYNC_IND idatha yokusakaza, ukusakaza kuqukethe inkambu ebizwa ngokuthi Ulwazi lwe-BIG, idatha equkethwe kule nkambu izosetshenziselwa ukuvumelanisa ne-BIS edingekayo. Isixhumanisi esisha esinengqondo sokulawula ukusakaza kwe-LEB-C sisetshenziselwa ukulawula isixhumanisi sesendlalelo se-LL, njengokubuyekezwa kokubuyekezwa kwesiteshi, futhi isixhumanisi esinengqondo sesiteshi se-LE-S (STREAM) noma i-LE-F (FRAME) sizosetshenziselwa ukugeleza kwedatha yomsebenzisi futhi idatha. Inzuzo enkulu yendlela ye-BIS ukuthi idatha ingadluliselwa kubamukeli abaningi ngokuvumelanisa.
Ukusakaza kwe-isochronous nemodi yeqembu isekela ukudluliswa okuvumelanayo kokusakazwa kwedatha yezamukeli eziningi ezingaxhumekile. Kuyabonakala ukuthi umehluko omkhulu phakathi kwayo nemodi ye-CIG ukuthi le modi isekela kuphela ukuxhumana kwendlela eyodwa.
Isifinyezo sezici ezintsha ze-BT5.2 LE AUDIO:
I-BT5.2 isilawuli esisha esingeziwe sokuvumelanisa ungqimba lwe-ISOAL ukuze sisekele ukudluliswa kokusakaza kwedatha ye-LE AUDIO.
I-BT5.2 isekela isakhiwo sezokuthutha esisha ukuze sisekele ukuxhumana okugxile ekuxhumekeni nokungaxhumeki okuhambisanayo.
Kunendlela entsha ye-LE Security Mode 3 esakazwa ngokususelwa futhi evumela ukubethela kwedatha ukuthi kusetshenziswe emaqenjini okuvumelanisa okusakaza.
Isendlalelo se-HCI sengeza inombolo yemiyalo emisha nemicimbi evumela ukuvumelanisa ukucushwa okudingekayo nokuxhumana.
Isendlalelo sesixhumanisi sengeza ama-PDU amasha, okuhlanganisa ama-PDU okuvumelanisa axhunyiwe nama-PDU okuvumelanisa okusakaza. I-LL_CIS_REQ ne-LL_CIS_RSP zisetshenziselwa ukudala ukuxhumana nokulawula ukugeleza kokuvumelanisa.
I-LE AUDIO isekela i-1M, 2M, CODED amanani amaningi we-PHY.
