Joint User Pairing and Power Allocation for NOMA-Based GEO and LEO Satellite Network
Multi-layer satellite networks (MLSNs) is of great potential for the integrated 5G networks to provide diversified services. However, MLSNs confront frequency interference coordination problem between satellite systems in different orbits. This paper investigates a joint user pairing and power alloc...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2021-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9427201/ |
| _version_ | 1818436894044717056 |
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| author | Ruixing Ge Dongming Bian Jian Cheng Kang An Jing Hu Guangxia Li |
| author_facet | Ruixing Ge Dongming Bian Jian Cheng Kang An Jing Hu Guangxia Li |
| author_sort | Ruixing Ge |
| collection | DOAJ |
| description | Multi-layer satellite networks (MLSNs) is of great potential for the integrated 5G networks to provide diversified services. However, MLSNs confront frequency interference coordination problem between satellite systems in different orbits. This paper investigates a joint user pairing and power allocation scheme in a non-orthogonal multiple access (NOMA)-based geostationary earth orbit (GEO) and low earth orbit (LEO) satellite network. Specifically, a novel NOMA framework with two uplink receivers, i.e. the GEO and LEO satellites is established where the NOMA groups are formed considering the subcarrier assignment of ground users. To maximize the system capacity, an optimization problem is then introduced subject to the decoding threshold and power consumption. Since the formulated problem is non-convex and mathematically intractable, we decompose it into user pairing and power allocation schemes. In the user pairing scheme, virtual GEO users are generated to transform the multi-user pairing problem into a matching problem and a max-min pairing strategy is adopted to ensure the fairness among NOMA groups. In the power allocation scheme, the non-convex problem is transformed into multiple convex subproblems and solved by iterative algorithm. Simulation results validate the effectiveness and superiority of the proposed schemes when compared with several existing schemes. |
| first_indexed | 2024-12-14T17:16:01Z |
| format | Article |
| id | doaj.art-efa58328d26b401f95ef7f480da780f4 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-14T17:16:01Z |
| publishDate | 2021-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-efa58328d26b401f95ef7f480da780f42022-12-21T22:53:26ZengIEEEIEEE Access2169-35362021-01-019932559326610.1109/ACCESS.2021.30784589427201Joint User Pairing and Power Allocation for NOMA-Based GEO and LEO Satellite NetworkRuixing Ge0https://orcid.org/0000-0002-5294-5378Dongming Bian1Jian Cheng2Kang An3https://orcid.org/0000-0003-4720-0635Jing Hu4https://orcid.org/0000-0001-5567-6911Guangxia Li5College of Communications Engineering, Army Engineering University, Nanjing, ChinaCollege of Communications Engineering, Army Engineering University, Nanjing, ChinaCollege of Communications Engineering, Army Engineering University, Nanjing, ChinaSixty-third Research Institute, National University of Defense Technology, Nanjing, ChinaCollege of Communications Engineering, Army Engineering University, Nanjing, ChinaCollege of Communications Engineering, Army Engineering University, Nanjing, ChinaMulti-layer satellite networks (MLSNs) is of great potential for the integrated 5G networks to provide diversified services. However, MLSNs confront frequency interference coordination problem between satellite systems in different orbits. This paper investigates a joint user pairing and power allocation scheme in a non-orthogonal multiple access (NOMA)-based geostationary earth orbit (GEO) and low earth orbit (LEO) satellite network. Specifically, a novel NOMA framework with two uplink receivers, i.e. the GEO and LEO satellites is established where the NOMA groups are formed considering the subcarrier assignment of ground users. To maximize the system capacity, an optimization problem is then introduced subject to the decoding threshold and power consumption. Since the formulated problem is non-convex and mathematically intractable, we decompose it into user pairing and power allocation schemes. In the user pairing scheme, virtual GEO users are generated to transform the multi-user pairing problem into a matching problem and a max-min pairing strategy is adopted to ensure the fairness among NOMA groups. In the power allocation scheme, the non-convex problem is transformed into multiple convex subproblems and solved by iterative algorithm. Simulation results validate the effectiveness and superiority of the proposed schemes when compared with several existing schemes.https://ieeexplore.ieee.org/document/9427201/Multi-layer satellite networksnon-orthogonal multiple accessuser pairingpower allocation |
| spellingShingle | Ruixing Ge Dongming Bian Jian Cheng Kang An Jing Hu Guangxia Li Joint User Pairing and Power Allocation for NOMA-Based GEO and LEO Satellite Network IEEE Access Multi-layer satellite networks non-orthogonal multiple access user pairing power allocation |
| title | Joint User Pairing and Power Allocation for NOMA-Based GEO and LEO Satellite Network |
| title_full | Joint User Pairing and Power Allocation for NOMA-Based GEO and LEO Satellite Network |
| title_fullStr | Joint User Pairing and Power Allocation for NOMA-Based GEO and LEO Satellite Network |
| title_full_unstemmed | Joint User Pairing and Power Allocation for NOMA-Based GEO and LEO Satellite Network |
| title_short | Joint User Pairing and Power Allocation for NOMA-Based GEO and LEO Satellite Network |
| title_sort | joint user pairing and power allocation for noma based geo and leo satellite network |
| topic | Multi-layer satellite networks non-orthogonal multiple access user pairing power allocation |
| url | https://ieeexplore.ieee.org/document/9427201/ |
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