Uplink Scheduling and Adjacent-Channel Coupling Loss Analysis for TD-LTE Deployment
TD-LTE, one of the two duplexing modes in LTE, operates in unpaired spectrum and has the advantages of TDD-based technologies. It is expected that TD-LTE will be more rapidly deployed in near future and most of WiMax operators will upgrade their networks to TD-LTE gradually. Before completely upgrad...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2014/685102 |
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| author | Woon-Young Yeo Sung Ho Moon Jae-Hoon Kim |
| author_facet | Woon-Young Yeo Sung Ho Moon Jae-Hoon Kim |
| author_sort | Woon-Young Yeo |
| collection | DOAJ |
| description | TD-LTE, one of the two duplexing modes in LTE, operates in unpaired spectrum and has the advantages of TDD-based technologies. It is expected that TD-LTE will be more rapidly deployed in near future and most of WiMax operators will upgrade their networks to TD-LTE gradually. Before completely upgrading to TD-LTE, WiMax may coexist with TD-LTE in an adjacent frequency band. In addition, multiple TD-LTE operators may deploy their networks in adjacent bands. When more than one TDD network operates in adjacent frequency bands, severe interference may happen due to adjacent channel interference (ACI) and unsynchronized operations. In this paper, coexistence issues between TD-LTE and other systems are analyzed and coexistence requirements are provided. This paper has three research objectives. First, frame synchronization between TD-LTE and WiMax is discussed by investigating possible combinations of TD-LTE and WiMax configurations. Second, an uplink scheduling algorithm is proposed to utilize a leakage pattern of ACI in synchronized operations. Third, minimum requirements for coexistence in unsynchronized operations are analyzed by introducing a concept of adjacent-channel coupling loss. From the analysis and simulation results, we can see that coexistence of TD-LTE with other TDD systems is feasible if the two networks are synchronized. For the unsynchronized case, some special cell-site engineering techniques may be required to reduce the ACI. |
| format | Article |
| id | doaj-art-d68f090bfc6f4c92b976289828009967 |
| institution | Kabale University |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-d68f090bfc6f4c92b9762898280099672025-02-03T06:01:37ZengWileyThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/685102685102Uplink Scheduling and Adjacent-Channel Coupling Loss Analysis for TD-LTE DeploymentWoon-Young Yeo0Sung Ho Moon1Jae-Hoon Kim2Department of Information and Communication Engineering, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 143-747, Republic of KoreaNetwork Technology R&D Center, SK Telecom, 9-1 Sunae-dong, Bundang-gu, Seongnam 463-838, Republic of KoreaDepartment of Industrial Engineering, Ajou University, Yeongtong-gu, Suwon 443-749, Republic of KoreaTD-LTE, one of the two duplexing modes in LTE, operates in unpaired spectrum and has the advantages of TDD-based technologies. It is expected that TD-LTE will be more rapidly deployed in near future and most of WiMax operators will upgrade their networks to TD-LTE gradually. Before completely upgrading to TD-LTE, WiMax may coexist with TD-LTE in an adjacent frequency band. In addition, multiple TD-LTE operators may deploy their networks in adjacent bands. When more than one TDD network operates in adjacent frequency bands, severe interference may happen due to adjacent channel interference (ACI) and unsynchronized operations. In this paper, coexistence issues between TD-LTE and other systems are analyzed and coexistence requirements are provided. This paper has three research objectives. First, frame synchronization between TD-LTE and WiMax is discussed by investigating possible combinations of TD-LTE and WiMax configurations. Second, an uplink scheduling algorithm is proposed to utilize a leakage pattern of ACI in synchronized operations. Third, minimum requirements for coexistence in unsynchronized operations are analyzed by introducing a concept of adjacent-channel coupling loss. From the analysis and simulation results, we can see that coexistence of TD-LTE with other TDD systems is feasible if the two networks are synchronized. For the unsynchronized case, some special cell-site engineering techniques may be required to reduce the ACI.http://dx.doi.org/10.1155/2014/685102 |
| spellingShingle | Woon-Young Yeo Sung Ho Moon Jae-Hoon Kim Uplink Scheduling and Adjacent-Channel Coupling Loss Analysis for TD-LTE Deployment The Scientific World Journal |
| title | Uplink Scheduling and Adjacent-Channel Coupling Loss Analysis for TD-LTE Deployment |
| title_full | Uplink Scheduling and Adjacent-Channel Coupling Loss Analysis for TD-LTE Deployment |
| title_fullStr | Uplink Scheduling and Adjacent-Channel Coupling Loss Analysis for TD-LTE Deployment |
| title_full_unstemmed | Uplink Scheduling and Adjacent-Channel Coupling Loss Analysis for TD-LTE Deployment |
| title_short | Uplink Scheduling and Adjacent-Channel Coupling Loss Analysis for TD-LTE Deployment |
| title_sort | uplink scheduling and adjacent channel coupling loss analysis for td lte deployment |
| url | http://dx.doi.org/10.1155/2014/685102 |
| work_keys_str_mv | AT woonyoungyeo uplinkschedulingandadjacentchannelcouplinglossanalysisfortdltedeployment AT sunghomoon uplinkschedulingandadjacentchannelcouplinglossanalysisfortdltedeployment AT jaehoonkim uplinkschedulingandadjacentchannelcouplinglossanalysisfortdltedeployment |