Spectral efficient optimisation for multihop relay networks adopting HARQ schemes
A joint power and rate optimisation for multihop relay networks adopting different hybrid automatic repeat request (HARQ) schemes are investigated. Specifically, Type‐I HARQ, chase‐combining‐based HARQ and schemes without HARQ are considered with practical system parameters. The optimisation problem...
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| Format: | Article |
| Language: | English |
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Wiley
2017-03-01
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| Series: | Electronics Letters |
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| Online Access: | https://doi.org/10.1049/el.2016.4164 |
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| _version_ | 1832096663821352960 |
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| author | Junmei Han Yong Xi Jibo Wei |
| author_facet | Junmei Han Yong Xi Jibo Wei |
| author_sort | Junmei Han |
| collection | DOAJ |
| description | A joint power and rate optimisation for multihop relay networks adopting different hybrid automatic repeat request (HARQ) schemes are investigated. Specifically, Type‐I HARQ, chase‐combining‐based HARQ and schemes without HARQ are considered with practical system parameters. The optimisation problem is to adjust transmission power and rate of each node to maximise spectral efficiency under the limitations of total power consumption. However, this problem is not always mathematically tractable for three HARQ schemes. Hence, low‐complexity iterative algorithms are proposed to obtain the optimisation strategies. Numerical results demonstrate that joint optimisation strategy outperforms conventional separate optimisation strategies significantly. The impact of the path loss conditions is also investigated. It is found that performance improvement increases with increase in link unbalance. |
| format | Article |
| id | doaj-art-5036a34e345c40c7ab979e1c47086272 |
| institution | Kabale University |
| issn | 0013-5194 1350-911X |
| language | English |
| publishDate | 2017-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | Electronics Letters |
| spelling | doaj-art-5036a34e345c40c7ab979e1c470862722025-02-05T12:30:43ZengWileyElectronics Letters0013-51941350-911X2017-03-0153535836010.1049/el.2016.4164Spectral efficient optimisation for multihop relay networks adopting HARQ schemesJunmei Han0Yong Xi1Jibo Wei2School of Electronic Science and Computer EngineeringNational University of Defense TechnologyChangsha410073People's Republic of ChinaSchool of Electronic Science and Computer EngineeringNational University of Defense TechnologyChangsha410073People's Republic of ChinaSchool of Electronic Science and Computer EngineeringNational University of Defense TechnologyChangsha410073People's Republic of ChinaA joint power and rate optimisation for multihop relay networks adopting different hybrid automatic repeat request (HARQ) schemes are investigated. Specifically, Type‐I HARQ, chase‐combining‐based HARQ and schemes without HARQ are considered with practical system parameters. The optimisation problem is to adjust transmission power and rate of each node to maximise spectral efficiency under the limitations of total power consumption. However, this problem is not always mathematically tractable for three HARQ schemes. Hence, low‐complexity iterative algorithms are proposed to obtain the optimisation strategies. Numerical results demonstrate that joint optimisation strategy outperforms conventional separate optimisation strategies significantly. The impact of the path loss conditions is also investigated. It is found that performance improvement increases with increase in link unbalance.https://doi.org/10.1049/el.2016.4164spectral efficient optimisationmultihop relay networkstype‐I HARQchase‐combininghybrid automatic repeat request schemestransmission power |
| spellingShingle | Junmei Han Yong Xi Jibo Wei Spectral efficient optimisation for multihop relay networks adopting HARQ schemes Electronics Letters spectral efficient optimisation multihop relay networks type‐I HARQ chase‐combining hybrid automatic repeat request schemes transmission power |
| title | Spectral efficient optimisation for multihop relay networks adopting HARQ schemes |
| title_full | Spectral efficient optimisation for multihop relay networks adopting HARQ schemes |
| title_fullStr | Spectral efficient optimisation for multihop relay networks adopting HARQ schemes |
| title_full_unstemmed | Spectral efficient optimisation for multihop relay networks adopting HARQ schemes |
| title_short | Spectral efficient optimisation for multihop relay networks adopting HARQ schemes |
| title_sort | spectral efficient optimisation for multihop relay networks adopting harq schemes |
| topic | spectral efficient optimisation multihop relay networks type‐I HARQ chase‐combining hybrid automatic repeat request schemes transmission power |
| url | https://doi.org/10.1049/el.2016.4164 |
| work_keys_str_mv | AT junmeihan spectralefficientoptimisationformultihoprelaynetworksadoptingharqschemes AT yongxi spectralefficientoptimisationformultihoprelaynetworksadoptingharqschemes AT jibowei spectralefficientoptimisationformultihoprelaynetworksadoptingharqschemes |