Tech-invite  3GPPspace  IETFspace
◀  ▶  21  22  23  24  25  26  27  28  29  31  32  33  34  35  36  37  38  4‑5x
Top   in Index   Prev   Next

TR 26.989
Media, Codecs and MBMS enhancements
for MCPTT over LTE

3GPP‑Page   ETSI‑search   fToC↓   Partial Content →
V19.0.0 (PDF)  2025/09  75 p.
V18.0.0  2024/03  75 p.
V17.0.0  2022/03  75 p.
V16.0.0  2020/06  75 p.
V15.0.0  2018/06  75 p.
V14.0.0  2017/03  75 p.
V13.1.0  2016/06  75 p.
Rapporteur:
Mr. Turcotte, Eric
Ericsson LM

full Table of Contents for  TR 26.989  Word version:  18.0.0

each clause number in 'red' refers to the equivalent title in the Partial Content
Here   Top
1Scope  p. 6
2References  p. 6
3Abbreviations  p. 7
4Reference Model  p. 7
5Key Issues for Supporting MCPTT  p. 8
5.1Key Issue#1: Codec for MCPTT  p. 8
5.1.1Review of Codec Alternatives and their Relative Perceptual Performance  p. 8
5.1.1.1Overview of the 3GPP Codec Comparison  p. 8
5.1.1.2Narrowband Comparison vs AMR  p. 8
5.1.1.3Wideband Comparison vs AMR-WB  p. 12
5.1.1.4Super-wideband EVS and Relationships to Other Bandwidths  p. 16
5.1.1.5Comparison of the 3GPP Codecs to TETRA  p. 17
5.1.1.6Comparison of Performance over MCPTT Bearers  p. 20
5.1.1.6.1"HD-Voice" AMR-WB performance over 3GPP networks  p. 20
5.1.1.6.2MCPTT Bearers  p. 21
5.1.1.6.3AMR-WB and EVS Performance over the MCPTT Bearers  p. 23
5.1.1.6.3.1EVS Speech Quality  p. 23
5.1.1.6.3.2Unicast bearer  p. 28
5.1.1.6.3.3MBMS bearer  p. 28
5.1.1.6.3.4LTE-D bearer  p. 31
5.1.1.6.4Conclusions  p. 37
5.1.1.7Listening effort evaluation of AMR-WB and EVS under impaired channels  p. 38
5.1.1.7.1Test setup  p. 38
5.1.1.7.2Test results  p. 38
5.1.2Review of the Codec Alternatives and their Relative Speech Intelligibility in Clean and Low SNRs  p. 41
5.1.2.1Speech Intelligibility  p. 41
5.1.2.1.1MCPTT bearers - speech intelligibility  p. 48
5.1.2.1.2Conclusions  p. 53
5.1.3Review of Codec Alternatives and their Relative Complexity  p. 54
5.1.4Recommended requirements  p. 55
5.1.5GAP Analysis and Evaluation  p. 56
5.1.5.1Requirements on Audio/Voice Quality  p. 56
5.1.5.2Discrete/Ambient Listening and Remotely Initiated Monitoring  p. 56
5.1.5.3Noise Reduction  p. 56
5.1.5.4Common Codec Constraints of MCPTT  p. 56
5.1.5.5Requirements on Transcoding Functions in the Network  p. 57
5.1.6Criteria with respect to MCPTT codec selection  p. 58
5.1.7Solution  p. 59
5.2Key Issue#2: User Experience  p. 59
5.2.1Description  p. 59
5.2.2Recommended requirements  p. 59
5.2.3GAP Analysis and Evaluation  p. 59
5.2.3.1Longer e2e delay over BC bearer issue  p. 59
5.2.3.2Mobility issue  p. 60
5.2.3.2.1BC handoff to UC  p. 60
5.2.3.2.2UC handoff to BC  p. 61
5.2.4Assumptions  p. 61
5.2.5Solution  p. 61
5.2.5.1Transport delay difference adjustment  p. 61
5.2.5.2RTP payload treatment  p. 61
5.3Key Issue#3: MCPTT over MBMS support  p. 62
5.3.1Description  p. 62
5.3.2Deployment Considerations  p. 64
5.3.3Realization (Stage 3) Considerations (On-Network)  p. 64
5.3.4Media Handling  p. 64
5.3.5QoE for MCPTT over MBMS  p. 65
5.3.5.1QoE for both MNO and MCPTT service provider  p. 65
5.3.6eNB Scheduling on the MBMS Bearer  p. 65
5.3.7Needed information to describe an MCPTT User Plane  p. 65
6Conclusion  p. 65
A Simulation Models and Parameters  p. 67
A.1MBMS Bearer Simulation Model  p. 67
A.1.1Coverage  p. 67
A.1.2Error Traces  p. 68
A.1.3eNB Scheduling  p. 71
A.2Correlation between Subjective MOS and P.OLQA  p. 72
$Change history  p. 73

Up   Top