Self-organized Dynamic FFR Resource Allocation Scheme for LTE-Advanced Relay Based Networks
Abstract Inter-Cell Interference (ICI) from neighboring cells is a major challenge that severely degrade the performance of Orthogonal Frequency Division Multiple Access based cellular mobile systems, particularly for cell-edge users. An efficient technique to mitigate ICI is interference coordinati...
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| Autor*in: |
Mohamed, Ahmed S. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2016 |
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| Schlagwörter: |
Long Term Evolution-Advanced (LTE-A) |
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| Anmerkung: |
© Springer Science+Business Media New York 2016 |
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| Übergeordnetes Werk: |
Enthalten in: Wireless personal communications - Springer US, 1994, 91(2016), 2 vom: 25. Juli, Seite 933-955 |
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| Übergeordnetes Werk: |
volume:91 ; year:2016 ; number:2 ; day:25 ; month:07 ; pages:933-955 |
| Links: |
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| DOI / URN: |
10.1007/s11277-016-3506-3 |
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| Katalog-ID: |
OLC2053800208 |
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| 520 | |a Abstract Inter-Cell Interference (ICI) from neighboring cells is a major challenge that severely degrade the performance of Orthogonal Frequency Division Multiple Access based cellular mobile systems, particularly for cell-edge users. An efficient technique to mitigate ICI is interference coordination. The most commonly Inter-Cell Interfere Coordination technique is Fractional Frequency Reuse (FFR). Furthermore in order to effectively improve cell-edge performance in terms of coverage extension and throughput, the 3rd Generation Partnership Project introduced the use of relays in Long Term Evolution-Advanced (LTE-A) networks to achieve self-backhauling of radio signals between Evolved NodeBs (eNBs) and UEs. This paper introduces a Self-Organized Dynamic FFR Resource Allocation scheme (SODRA-FFR) which dynamically allocates frequency resources to cell inner and outer regions in relay based LTE-A networks to improve cell edge performance and maximize fairness among UEs. In this scheme, the downlink frequency resources are dynamically allocated to cell inner and outer regions and the outer region frequency resources are dynamically distributed between eNB and relay stations in each cell based on coordination between neighboring eNBs and relay stations through a message passing approach over LTE-X2 interfaces. The performance of the proposed SODRA-FFR scheme without and with relays is evaluated using MATLAB simulations and compared with different combinations of frequency resources allocation to cell inner and outer regions as well as with other frequency reuse scheme (i.e., frequency reuse-1 and frequency reuse-3). The results show that the proposed SODRA-FFR scheme improves cell-edge performance and achieves high degree of fairness among UEs compared to reference resource allocation schemes. The results also show that the proposed SODRA-FFR scheme with RSs improves the fairness performance by 30 and 13 % compared to that of frequency reuse-1 and frequency reuse-3 schemes, respectively. In addition, the proposed SODRA-FFR scheme with RSs achieves 55 and 26 % increase in cell-edge throughput compared to that of frequency reuse-1 and frequency reuse-3 schemes, respectively. | ||
| 650 | 4 | |a Long Term Evolution-Advanced (LTE-A) | |
| 650 | 4 | |a Resource allocation | |
| 650 | 4 | |a Relay Station (RS) | |
| 650 | 4 | |a Orthogonal Frequency Division Multiple Access (OFDMA) | |
| 650 | 4 | |a Inter-Cell Interference Coordination (ICIC) | |
| 700 | 1 | |a Abd-Elnaby, Mohammed |4 aut | |
| 700 | 1 | |a El-Dolil, Sami A. |4 aut | |
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10.1007/s11277-016-3506-3 doi (DE-627)OLC2053800208 (DE-He213)s11277-016-3506-3-p DE-627 ger DE-627 rakwb eng 620 VZ Mohamed, Ahmed S. verfasserin aut Self-organized Dynamic FFR Resource Allocation Scheme for LTE-Advanced Relay Based Networks 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media New York 2016 Abstract Inter-Cell Interference (ICI) from neighboring cells is a major challenge that severely degrade the performance of Orthogonal Frequency Division Multiple Access based cellular mobile systems, particularly for cell-edge users. An efficient technique to mitigate ICI is interference coordination. The most commonly Inter-Cell Interfere Coordination technique is Fractional Frequency Reuse (FFR). Furthermore in order to effectively improve cell-edge performance in terms of coverage extension and throughput, the 3rd Generation Partnership Project introduced the use of relays in Long Term Evolution-Advanced (LTE-A) networks to achieve self-backhauling of radio signals between Evolved NodeBs (eNBs) and UEs. This paper introduces a Self-Organized Dynamic FFR Resource Allocation scheme (SODRA-FFR) which dynamically allocates frequency resources to cell inner and outer regions in relay based LTE-A networks to improve cell edge performance and maximize fairness among UEs. In this scheme, the downlink frequency resources are dynamically allocated to cell inner and outer regions and the outer region frequency resources are dynamically distributed between eNB and relay stations in each cell based on coordination between neighboring eNBs and relay stations through a message passing approach over LTE-X2 interfaces. The performance of the proposed SODRA-FFR scheme without and with relays is evaluated using MATLAB simulations and compared with different combinations of frequency resources allocation to cell inner and outer regions as well as with other frequency reuse scheme (i.e., frequency reuse-1 and frequency reuse-3). The results show that the proposed SODRA-FFR scheme improves cell-edge performance and achieves high degree of fairness among UEs compared to reference resource allocation schemes. The results also show that the proposed SODRA-FFR scheme with RSs improves the fairness performance by 30 and 13 % compared to that of frequency reuse-1 and frequency reuse-3 schemes, respectively. In addition, the proposed SODRA-FFR scheme with RSs achieves 55 and 26 % increase in cell-edge throughput compared to that of frequency reuse-1 and frequency reuse-3 schemes, respectively. Long Term Evolution-Advanced (LTE-A) Resource allocation Relay Station (RS) Orthogonal Frequency Division Multiple Access (OFDMA) Inter-Cell Interference Coordination (ICIC) Abd-Elnaby, Mohammed aut El-Dolil, Sami A. aut Enthalten in Wireless personal communications Springer US, 1994 91(2016), 2 vom: 25. Juli, Seite 933-955 (DE-627)188950273 (DE-600)1287489-9 (DE-576)049958909 0929-6212 nnns volume:91 year:2016 number:2 day:25 month:07 pages:933-955 https://doi.org/10.1007/s11277-016-3506-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-MKW GBV_ILN_70 GBV_ILN_4266 AR 91 2016 2 25 07 933-955 |
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10.1007/s11277-016-3506-3 doi (DE-627)OLC2053800208 (DE-He213)s11277-016-3506-3-p DE-627 ger DE-627 rakwb eng 620 VZ Mohamed, Ahmed S. verfasserin aut Self-organized Dynamic FFR Resource Allocation Scheme for LTE-Advanced Relay Based Networks 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media New York 2016 Abstract Inter-Cell Interference (ICI) from neighboring cells is a major challenge that severely degrade the performance of Orthogonal Frequency Division Multiple Access based cellular mobile systems, particularly for cell-edge users. An efficient technique to mitigate ICI is interference coordination. The most commonly Inter-Cell Interfere Coordination technique is Fractional Frequency Reuse (FFR). Furthermore in order to effectively improve cell-edge performance in terms of coverage extension and throughput, the 3rd Generation Partnership Project introduced the use of relays in Long Term Evolution-Advanced (LTE-A) networks to achieve self-backhauling of radio signals between Evolved NodeBs (eNBs) and UEs. This paper introduces a Self-Organized Dynamic FFR Resource Allocation scheme (SODRA-FFR) which dynamically allocates frequency resources to cell inner and outer regions in relay based LTE-A networks to improve cell edge performance and maximize fairness among UEs. In this scheme, the downlink frequency resources are dynamically allocated to cell inner and outer regions and the outer region frequency resources are dynamically distributed between eNB and relay stations in each cell based on coordination between neighboring eNBs and relay stations through a message passing approach over LTE-X2 interfaces. The performance of the proposed SODRA-FFR scheme without and with relays is evaluated using MATLAB simulations and compared with different combinations of frequency resources allocation to cell inner and outer regions as well as with other frequency reuse scheme (i.e., frequency reuse-1 and frequency reuse-3). The results show that the proposed SODRA-FFR scheme improves cell-edge performance and achieves high degree of fairness among UEs compared to reference resource allocation schemes. The results also show that the proposed SODRA-FFR scheme with RSs improves the fairness performance by 30 and 13 % compared to that of frequency reuse-1 and frequency reuse-3 schemes, respectively. In addition, the proposed SODRA-FFR scheme with RSs achieves 55 and 26 % increase in cell-edge throughput compared to that of frequency reuse-1 and frequency reuse-3 schemes, respectively. Long Term Evolution-Advanced (LTE-A) Resource allocation Relay Station (RS) Orthogonal Frequency Division Multiple Access (OFDMA) Inter-Cell Interference Coordination (ICIC) Abd-Elnaby, Mohammed aut El-Dolil, Sami A. aut Enthalten in Wireless personal communications Springer US, 1994 91(2016), 2 vom: 25. Juli, Seite 933-955 (DE-627)188950273 (DE-600)1287489-9 (DE-576)049958909 0929-6212 nnns volume:91 year:2016 number:2 day:25 month:07 pages:933-955 https://doi.org/10.1007/s11277-016-3506-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-MKW GBV_ILN_70 GBV_ILN_4266 AR 91 2016 2 25 07 933-955 |
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10.1007/s11277-016-3506-3 doi (DE-627)OLC2053800208 (DE-He213)s11277-016-3506-3-p DE-627 ger DE-627 rakwb eng 620 VZ Mohamed, Ahmed S. verfasserin aut Self-organized Dynamic FFR Resource Allocation Scheme for LTE-Advanced Relay Based Networks 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media New York 2016 Abstract Inter-Cell Interference (ICI) from neighboring cells is a major challenge that severely degrade the performance of Orthogonal Frequency Division Multiple Access based cellular mobile systems, particularly for cell-edge users. An efficient technique to mitigate ICI is interference coordination. The most commonly Inter-Cell Interfere Coordination technique is Fractional Frequency Reuse (FFR). Furthermore in order to effectively improve cell-edge performance in terms of coverage extension and throughput, the 3rd Generation Partnership Project introduced the use of relays in Long Term Evolution-Advanced (LTE-A) networks to achieve self-backhauling of radio signals between Evolved NodeBs (eNBs) and UEs. This paper introduces a Self-Organized Dynamic FFR Resource Allocation scheme (SODRA-FFR) which dynamically allocates frequency resources to cell inner and outer regions in relay based LTE-A networks to improve cell edge performance and maximize fairness among UEs. In this scheme, the downlink frequency resources are dynamically allocated to cell inner and outer regions and the outer region frequency resources are dynamically distributed between eNB and relay stations in each cell based on coordination between neighboring eNBs and relay stations through a message passing approach over LTE-X2 interfaces. The performance of the proposed SODRA-FFR scheme without and with relays is evaluated using MATLAB simulations and compared with different combinations of frequency resources allocation to cell inner and outer regions as well as with other frequency reuse scheme (i.e., frequency reuse-1 and frequency reuse-3). The results show that the proposed SODRA-FFR scheme improves cell-edge performance and achieves high degree of fairness among UEs compared to reference resource allocation schemes. The results also show that the proposed SODRA-FFR scheme with RSs improves the fairness performance by 30 and 13 % compared to that of frequency reuse-1 and frequency reuse-3 schemes, respectively. In addition, the proposed SODRA-FFR scheme with RSs achieves 55 and 26 % increase in cell-edge throughput compared to that of frequency reuse-1 and frequency reuse-3 schemes, respectively. Long Term Evolution-Advanced (LTE-A) Resource allocation Relay Station (RS) Orthogonal Frequency Division Multiple Access (OFDMA) Inter-Cell Interference Coordination (ICIC) Abd-Elnaby, Mohammed aut El-Dolil, Sami A. aut Enthalten in Wireless personal communications Springer US, 1994 91(2016), 2 vom: 25. Juli, Seite 933-955 (DE-627)188950273 (DE-600)1287489-9 (DE-576)049958909 0929-6212 nnns volume:91 year:2016 number:2 day:25 month:07 pages:933-955 https://doi.org/10.1007/s11277-016-3506-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-MKW GBV_ILN_70 GBV_ILN_4266 AR 91 2016 2 25 07 933-955 |
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10.1007/s11277-016-3506-3 doi (DE-627)OLC2053800208 (DE-He213)s11277-016-3506-3-p DE-627 ger DE-627 rakwb eng 620 VZ Mohamed, Ahmed S. verfasserin aut Self-organized Dynamic FFR Resource Allocation Scheme for LTE-Advanced Relay Based Networks 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media New York 2016 Abstract Inter-Cell Interference (ICI) from neighboring cells is a major challenge that severely degrade the performance of Orthogonal Frequency Division Multiple Access based cellular mobile systems, particularly for cell-edge users. An efficient technique to mitigate ICI is interference coordination. The most commonly Inter-Cell Interfere Coordination technique is Fractional Frequency Reuse (FFR). Furthermore in order to effectively improve cell-edge performance in terms of coverage extension and throughput, the 3rd Generation Partnership Project introduced the use of relays in Long Term Evolution-Advanced (LTE-A) networks to achieve self-backhauling of radio signals between Evolved NodeBs (eNBs) and UEs. This paper introduces a Self-Organized Dynamic FFR Resource Allocation scheme (SODRA-FFR) which dynamically allocates frequency resources to cell inner and outer regions in relay based LTE-A networks to improve cell edge performance and maximize fairness among UEs. In this scheme, the downlink frequency resources are dynamically allocated to cell inner and outer regions and the outer region frequency resources are dynamically distributed between eNB and relay stations in each cell based on coordination between neighboring eNBs and relay stations through a message passing approach over LTE-X2 interfaces. The performance of the proposed SODRA-FFR scheme without and with relays is evaluated using MATLAB simulations and compared with different combinations of frequency resources allocation to cell inner and outer regions as well as with other frequency reuse scheme (i.e., frequency reuse-1 and frequency reuse-3). The results show that the proposed SODRA-FFR scheme improves cell-edge performance and achieves high degree of fairness among UEs compared to reference resource allocation schemes. The results also show that the proposed SODRA-FFR scheme with RSs improves the fairness performance by 30 and 13 % compared to that of frequency reuse-1 and frequency reuse-3 schemes, respectively. In addition, the proposed SODRA-FFR scheme with RSs achieves 55 and 26 % increase in cell-edge throughput compared to that of frequency reuse-1 and frequency reuse-3 schemes, respectively. Long Term Evolution-Advanced (LTE-A) Resource allocation Relay Station (RS) Orthogonal Frequency Division Multiple Access (OFDMA) Inter-Cell Interference Coordination (ICIC) Abd-Elnaby, Mohammed aut El-Dolil, Sami A. aut Enthalten in Wireless personal communications Springer US, 1994 91(2016), 2 vom: 25. Juli, Seite 933-955 (DE-627)188950273 (DE-600)1287489-9 (DE-576)049958909 0929-6212 nnns volume:91 year:2016 number:2 day:25 month:07 pages:933-955 https://doi.org/10.1007/s11277-016-3506-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-MKW GBV_ILN_70 GBV_ILN_4266 AR 91 2016 2 25 07 933-955 |
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10.1007/s11277-016-3506-3 doi (DE-627)OLC2053800208 (DE-He213)s11277-016-3506-3-p DE-627 ger DE-627 rakwb eng 620 VZ Mohamed, Ahmed S. verfasserin aut Self-organized Dynamic FFR Resource Allocation Scheme for LTE-Advanced Relay Based Networks 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media New York 2016 Abstract Inter-Cell Interference (ICI) from neighboring cells is a major challenge that severely degrade the performance of Orthogonal Frequency Division Multiple Access based cellular mobile systems, particularly for cell-edge users. An efficient technique to mitigate ICI is interference coordination. The most commonly Inter-Cell Interfere Coordination technique is Fractional Frequency Reuse (FFR). Furthermore in order to effectively improve cell-edge performance in terms of coverage extension and throughput, the 3rd Generation Partnership Project introduced the use of relays in Long Term Evolution-Advanced (LTE-A) networks to achieve self-backhauling of radio signals between Evolved NodeBs (eNBs) and UEs. This paper introduces a Self-Organized Dynamic FFR Resource Allocation scheme (SODRA-FFR) which dynamically allocates frequency resources to cell inner and outer regions in relay based LTE-A networks to improve cell edge performance and maximize fairness among UEs. In this scheme, the downlink frequency resources are dynamically allocated to cell inner and outer regions and the outer region frequency resources are dynamically distributed between eNB and relay stations in each cell based on coordination between neighboring eNBs and relay stations through a message passing approach over LTE-X2 interfaces. The performance of the proposed SODRA-FFR scheme without and with relays is evaluated using MATLAB simulations and compared with different combinations of frequency resources allocation to cell inner and outer regions as well as with other frequency reuse scheme (i.e., frequency reuse-1 and frequency reuse-3). The results show that the proposed SODRA-FFR scheme improves cell-edge performance and achieves high degree of fairness among UEs compared to reference resource allocation schemes. The results also show that the proposed SODRA-FFR scheme with RSs improves the fairness performance by 30 and 13 % compared to that of frequency reuse-1 and frequency reuse-3 schemes, respectively. In addition, the proposed SODRA-FFR scheme with RSs achieves 55 and 26 % increase in cell-edge throughput compared to that of frequency reuse-1 and frequency reuse-3 schemes, respectively. Long Term Evolution-Advanced (LTE-A) Resource allocation Relay Station (RS) Orthogonal Frequency Division Multiple Access (OFDMA) Inter-Cell Interference Coordination (ICIC) Abd-Elnaby, Mohammed aut El-Dolil, Sami A. aut Enthalten in Wireless personal communications Springer US, 1994 91(2016), 2 vom: 25. Juli, Seite 933-955 (DE-627)188950273 (DE-600)1287489-9 (DE-576)049958909 0929-6212 nnns volume:91 year:2016 number:2 day:25 month:07 pages:933-955 https://doi.org/10.1007/s11277-016-3506-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-MKW GBV_ILN_70 GBV_ILN_4266 AR 91 2016 2 25 07 933-955 |
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In this scheme, the downlink frequency resources are dynamically allocated to cell inner and outer regions and the outer region frequency resources are dynamically distributed between eNB and relay stations in each cell based on coordination between neighboring eNBs and relay stations through a message passing approach over LTE-X2 interfaces. The performance of the proposed SODRA-FFR scheme without and with relays is evaluated using MATLAB simulations and compared with different combinations of frequency resources allocation to cell inner and outer regions as well as with other frequency reuse scheme (i.e., frequency reuse-1 and frequency reuse-3). The results show that the proposed SODRA-FFR scheme improves cell-edge performance and achieves high degree of fairness among UEs compared to reference resource allocation schemes. 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620 VZ Self-organized Dynamic FFR Resource Allocation Scheme for LTE-Advanced Relay Based Networks Long Term Evolution-Advanced (LTE-A) Resource allocation Relay Station (RS) Orthogonal Frequency Division Multiple Access (OFDMA) Inter-Cell Interference Coordination (ICIC) |
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self-organized dynamic ffr resource allocation scheme for lte-advanced relay based networks |
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Self-organized Dynamic FFR Resource Allocation Scheme for LTE-Advanced Relay Based Networks |
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Abstract Inter-Cell Interference (ICI) from neighboring cells is a major challenge that severely degrade the performance of Orthogonal Frequency Division Multiple Access based cellular mobile systems, particularly for cell-edge users. An efficient technique to mitigate ICI is interference coordination. The most commonly Inter-Cell Interfere Coordination technique is Fractional Frequency Reuse (FFR). Furthermore in order to effectively improve cell-edge performance in terms of coverage extension and throughput, the 3rd Generation Partnership Project introduced the use of relays in Long Term Evolution-Advanced (LTE-A) networks to achieve self-backhauling of radio signals between Evolved NodeBs (eNBs) and UEs. This paper introduces a Self-Organized Dynamic FFR Resource Allocation scheme (SODRA-FFR) which dynamically allocates frequency resources to cell inner and outer regions in relay based LTE-A networks to improve cell edge performance and maximize fairness among UEs. In this scheme, the downlink frequency resources are dynamically allocated to cell inner and outer regions and the outer region frequency resources are dynamically distributed between eNB and relay stations in each cell based on coordination between neighboring eNBs and relay stations through a message passing approach over LTE-X2 interfaces. The performance of the proposed SODRA-FFR scheme without and with relays is evaluated using MATLAB simulations and compared with different combinations of frequency resources allocation to cell inner and outer regions as well as with other frequency reuse scheme (i.e., frequency reuse-1 and frequency reuse-3). The results show that the proposed SODRA-FFR scheme improves cell-edge performance and achieves high degree of fairness among UEs compared to reference resource allocation schemes. The results also show that the proposed SODRA-FFR scheme with RSs improves the fairness performance by 30 and 13 % compared to that of frequency reuse-1 and frequency reuse-3 schemes, respectively. In addition, the proposed SODRA-FFR scheme with RSs achieves 55 and 26 % increase in cell-edge throughput compared to that of frequency reuse-1 and frequency reuse-3 schemes, respectively. © Springer Science+Business Media New York 2016 |
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Abstract Inter-Cell Interference (ICI) from neighboring cells is a major challenge that severely degrade the performance of Orthogonal Frequency Division Multiple Access based cellular mobile systems, particularly for cell-edge users. An efficient technique to mitigate ICI is interference coordination. The most commonly Inter-Cell Interfere Coordination technique is Fractional Frequency Reuse (FFR). Furthermore in order to effectively improve cell-edge performance in terms of coverage extension and throughput, the 3rd Generation Partnership Project introduced the use of relays in Long Term Evolution-Advanced (LTE-A) networks to achieve self-backhauling of radio signals between Evolved NodeBs (eNBs) and UEs. This paper introduces a Self-Organized Dynamic FFR Resource Allocation scheme (SODRA-FFR) which dynamically allocates frequency resources to cell inner and outer regions in relay based LTE-A networks to improve cell edge performance and maximize fairness among UEs. In this scheme, the downlink frequency resources are dynamically allocated to cell inner and outer regions and the outer region frequency resources are dynamically distributed between eNB and relay stations in each cell based on coordination between neighboring eNBs and relay stations through a message passing approach over LTE-X2 interfaces. The performance of the proposed SODRA-FFR scheme without and with relays is evaluated using MATLAB simulations and compared with different combinations of frequency resources allocation to cell inner and outer regions as well as with other frequency reuse scheme (i.e., frequency reuse-1 and frequency reuse-3). The results show that the proposed SODRA-FFR scheme improves cell-edge performance and achieves high degree of fairness among UEs compared to reference resource allocation schemes. The results also show that the proposed SODRA-FFR scheme with RSs improves the fairness performance by 30 and 13 % compared to that of frequency reuse-1 and frequency reuse-3 schemes, respectively. In addition, the proposed SODRA-FFR scheme with RSs achieves 55 and 26 % increase in cell-edge throughput compared to that of frequency reuse-1 and frequency reuse-3 schemes, respectively. © Springer Science+Business Media New York 2016 |
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Abstract Inter-Cell Interference (ICI) from neighboring cells is a major challenge that severely degrade the performance of Orthogonal Frequency Division Multiple Access based cellular mobile systems, particularly for cell-edge users. An efficient technique to mitigate ICI is interference coordination. The most commonly Inter-Cell Interfere Coordination technique is Fractional Frequency Reuse (FFR). Furthermore in order to effectively improve cell-edge performance in terms of coverage extension and throughput, the 3rd Generation Partnership Project introduced the use of relays in Long Term Evolution-Advanced (LTE-A) networks to achieve self-backhauling of radio signals between Evolved NodeBs (eNBs) and UEs. This paper introduces a Self-Organized Dynamic FFR Resource Allocation scheme (SODRA-FFR) which dynamically allocates frequency resources to cell inner and outer regions in relay based LTE-A networks to improve cell edge performance and maximize fairness among UEs. In this scheme, the downlink frequency resources are dynamically allocated to cell inner and outer regions and the outer region frequency resources are dynamically distributed between eNB and relay stations in each cell based on coordination between neighboring eNBs and relay stations through a message passing approach over LTE-X2 interfaces. The performance of the proposed SODRA-FFR scheme without and with relays is evaluated using MATLAB simulations and compared with different combinations of frequency resources allocation to cell inner and outer regions as well as with other frequency reuse scheme (i.e., frequency reuse-1 and frequency reuse-3). The results show that the proposed SODRA-FFR scheme improves cell-edge performance and achieves high degree of fairness among UEs compared to reference resource allocation schemes. The results also show that the proposed SODRA-FFR scheme with RSs improves the fairness performance by 30 and 13 % compared to that of frequency reuse-1 and frequency reuse-3 schemes, respectively. In addition, the proposed SODRA-FFR scheme with RSs achieves 55 and 26 % increase in cell-edge throughput compared to that of frequency reuse-1 and frequency reuse-3 schemes, respectively. © Springer Science+Business Media New York 2016 |
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