5G VOICE OVER NEW RADIO (VoNR)

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Tanaka
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5G VOICE OVER NEW RADIO (VoNR)

Postby Tanaka » 03 Dec 2021, 09:04

1 Introduction...................................................................................................................................................3
2 Voice call aspects in 5G NR...........................................................................................................................5
2.1 Voice services in an NSA dual connectivity setup..........................................................................................7
2.2 Voice services using EPS fallback....................................................................................................................8
2.2.1 Network interworking requirements supporting voice services.....................................................................8
2.2.2 Registration procedure – aspects for voice support........................................................................................9
2.2.3 5G IMS support.............................................................................................................................................11
2.2.4 EPS fallback..................................................................................................................................................16
2.3 Voice services using NG-eNB........................................................................................................................22
2.4 Voice services with RAT fallback...................................................................................................................23
2.5 Voice over NR (VoNR)...................................................................................................................................25
2.5.1 VoNR radio parameter support recommendation..........................................................................................27
2.6 Network deployment and connectivity options supporting voice.................................................................29
2.7 Speech codec aspects and EVS.....................................................................................................................33
2.8 Supplementary speech services, emergency calls and SMS........................................................................36
2.8.1 Supplementary speech services....................................................................................................................36
2.8.2 SMS in 5G.....................................................................................................................................................36
2.8.3 Emergency services in 5G.............................................................................................................................38
2.8.4 Automotive eCall in 5G.................................................................................................................................46
2.8.5 Emergency services over non-3GPP access..................................................................................................48
2.9 Signaling aspects for voice support in 5G.....................................................................................................49
3 VoNR – how test and measurement enables its success..........................................................................52
3.1 Lab based testing of VoNR...........................................................................................................................52
3.2 Field based testing of VoNR..........................................................................................................................55
4 Summary......................................................................................................................................................57
5 References...................................................................................................................................................59
6 Specifications..............................................................................................................................................61
7 Abbreviations...............................................................................................................................................62
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