Practical cross-layer testing of HARQ-induced delay variation on IP/RTP QoS and VoLTE QoE
Abstract As the PHY/MAC-layer IR-HARQ and RLC-layer ARQ error recovery procedures, adopted in LTE, may impose additional delay when their code-block retransmissions occur, the arising question is whether these significantly contribute to IP and consequently RTP packet delays, and finally degrade the...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2021-04-01
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| Series: | EURASIP Journal on Wireless Communications and Networking |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s13638-021-01970-y |
| _version_ | 1819142160587423744 |
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| author | Adriana Lipovac Vlatko Lipovac Ivan Grbavac Ines Obradović |
| author_facet | Adriana Lipovac Vlatko Lipovac Ivan Grbavac Ines Obradović |
| author_sort | Adriana Lipovac |
| collection | DOAJ |
| description | Abstract As the PHY/MAC-layer IR-HARQ and RLC-layer ARQ error recovery procedures, adopted in LTE, may impose additional delay when their code-block retransmissions occur, the arising question is whether these significantly contribute to IP and consequently RTP packet delays, and finally degrade the overall application-layer end-to-end QoE, especially when voice is transmitted over LTE? With this regard, we propose and demonstrate a VoLTE QoS and QoE test procedure based on PHY/MAC/RLC/IP/TCP-UDP/RTP cross-layer protocol analysis and perceptual speech quality QoE measurements. We identified monotonic relationship between the paired observations: QoE and HARQ RTT, i.e. between the PESQ voice quality rating and the IP/RTP packet latency, for given BLER of the received MAC/RLC code-blocks. Specifically, we found out that, for the HARQ RTT value of about 8 ms, only up to 2 HARQ retransmissions (and consequently no RLC-ARQ one) is appropriate during any voice packet, otherwise delay accumulation might not be accordingly “smoothed out” by jitter/playback buffers along the propagation path. |
| first_indexed | 2024-12-22T12:05:56Z |
| format | Article |
| id | doaj.art-fb92f21c96654eadbe62f1d50672be81 |
| institution | Directory Open Access Journal |
| issn | 1687-1499 |
| language | English |
| last_indexed | 2024-12-22T12:05:56Z |
| publishDate | 2021-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | EURASIP Journal on Wireless Communications and Networking |
| spelling | doaj.art-fb92f21c96654eadbe62f1d50672be812022-12-21T18:26:27ZengSpringerOpenEURASIP Journal on Wireless Communications and Networking1687-14992021-04-012021111810.1186/s13638-021-01970-yPractical cross-layer testing of HARQ-induced delay variation on IP/RTP QoS and VoLTE QoEAdriana Lipovac0Vlatko Lipovac1Ivan Grbavac2Ines Obradović3University of DubrovnikUniversity of DubrovnikUniversity of DubrovnikUniversity of DubrovnikAbstract As the PHY/MAC-layer IR-HARQ and RLC-layer ARQ error recovery procedures, adopted in LTE, may impose additional delay when their code-block retransmissions occur, the arising question is whether these significantly contribute to IP and consequently RTP packet delays, and finally degrade the overall application-layer end-to-end QoE, especially when voice is transmitted over LTE? With this regard, we propose and demonstrate a VoLTE QoS and QoE test procedure based on PHY/MAC/RLC/IP/TCP-UDP/RTP cross-layer protocol analysis and perceptual speech quality QoE measurements. We identified monotonic relationship between the paired observations: QoE and HARQ RTT, i.e. between the PESQ voice quality rating and the IP/RTP packet latency, for given BLER of the received MAC/RLC code-blocks. Specifically, we found out that, for the HARQ RTT value of about 8 ms, only up to 2 HARQ retransmissions (and consequently no RLC-ARQ one) is appropriate during any voice packet, otherwise delay accumulation might not be accordingly “smoothed out” by jitter/playback buffers along the propagation path.https://doi.org/10.1186/s13638-021-01970-yVoLTEVoice QoE testingProtocol analysis |
| spellingShingle | Adriana Lipovac Vlatko Lipovac Ivan Grbavac Ines Obradović Practical cross-layer testing of HARQ-induced delay variation on IP/RTP QoS and VoLTE QoE EURASIP Journal on Wireless Communications and Networking VoLTE Voice QoE testing Protocol analysis |
| title | Practical cross-layer testing of HARQ-induced delay variation on IP/RTP QoS and VoLTE QoE |
| title_full | Practical cross-layer testing of HARQ-induced delay variation on IP/RTP QoS and VoLTE QoE |
| title_fullStr | Practical cross-layer testing of HARQ-induced delay variation on IP/RTP QoS and VoLTE QoE |
| title_full_unstemmed | Practical cross-layer testing of HARQ-induced delay variation on IP/RTP QoS and VoLTE QoE |
| title_short | Practical cross-layer testing of HARQ-induced delay variation on IP/RTP QoS and VoLTE QoE |
| title_sort | practical cross layer testing of harq induced delay variation on ip rtp qos and volte qoe |
| topic | VoLTE Voice QoE testing Protocol analysis |
| url | https://doi.org/10.1186/s13638-021-01970-y |
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