{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:24:29Z","timestamp":1760243069806,"version":"build-2065373602"},"reference-count":37,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2015,9,17]],"date-time":"2015-09-17T00:00:00Z","timestamp":1442448000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In spectrum aggregation (SA), two or more component carriers (CCs) of different bandwidths in different bands can be aggregated to support a wider transmission bandwidth. The scheduling delay is the most important design constraint for the broadband wireless trunking (BWT) system, especially in the cognitive radio (CR) condition. The current resource scheduling schemes for spectrum aggregation become questionable and are not suitable for meeting the challenge of the delay requirement. Consequently, the authors propose a novel component carrier configuration and switching scheme for  real-time traffic (RT-CCCS) to satisfy the delay requirement in the CR-based SA system. In this work, the authors consider a sensor-network-assisted CR network. The authors first introduce a resource scheduling structure for SA in the CR condition. Then the proposed scheme is analyzed in detail. Finally, simulations are carried out to verify the analysis on the proposed scheme. Simulation results prove that our proposed scheme can satisfy the delay requirement in the CR-based SA system.<\/jats:p>","DOI":"10.3390\/s150923706","type":"journal-article","created":{"date-parts":[[2015,9,17]],"date-time":"2015-09-17T16:40:26Z","timestamp":1442508026000},"page":"23706-23726","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["A Novel Component Carrier Configuration and Switching Scheme for Real-Time Traffic in a Cognitive-Radio-Based Spectrum Aggregation System"],"prefix":"10.3390","volume":"15","author":[{"given":"Yunhai","family":"Fu","sequence":"first","affiliation":[{"name":"Harbin Institute of Technology Communication Research Center, Harbin 150001, China"},{"name":"Key Laboratory of Police Wireless Digital Communication, Ministry of Public Security,  Harbin 150001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lin","family":"Ma","sequence":"additional","affiliation":[{"name":"Harbin Institute of Technology Communication Research Center, Harbin 150001, China"},{"name":"Key Laboratory of Police Wireless Digital Communication, Ministry of Public Security,  Harbin 150001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yubin","family":"Xu","sequence":"additional","affiliation":[{"name":"Harbin Institute of Technology Communication Research Center, Harbin 150001, China"},{"name":"Key Laboratory of Police Wireless Digital Communication, Ministry of Public Security,  Harbin 150001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2015,9,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Tian, H., Gao, S., Zhu, J., and Chen, L. (2011, January 5\u20138). Improved component carrier selection method for non-continuous carrier aggregation in LTE-advanced systems. Proceedings of the 2011 IEEE Vehicular Technology Conference (VTC Fall), San Francisco, CA, USA.","DOI":"10.1109\/VETECF.2011.6092963"},{"key":"ref_2","unstructured":"3GPP TR 36.912: Feasibility Study for Further Advancements for E-UTRA (LTEAdvanced). Avaliable online: http:\/\/www.3gpp.org\/DynaReport\/36912.htm."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"89","DOI":"10.1109\/MCOM.2011.5783991","article-title":"Carrier aggregation for lte-advanced: Functionality and performance aspects","volume":"49","author":"Pedersen","year":"2011","journal-title":"IEEE Commun. Mag."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"55","DOI":"10.1109\/MVT.2013.2252277","article-title":"Toward Future Public Safety Communications: The Broadband Wireless Trunking Project in China","volume":"8","author":"Li","year":"2013","journal-title":"IEEE Veh. Technol. Mag."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1620","DOI":"10.1109\/TWC.2009.071075","article-title":"On capacity of cognitive radio networks with average interference power constraints","volume":"8","author":"Wang","year":"2009","journal-title":"IEEE Trans. Wirel. Commun."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"6068","DOI":"10.1109\/TSP.2012.2212892","article-title":"Wideband Spectrum Sensing With Sub-Nyquist Sampling in Cognitive Radios","volume":"60","author":"Sun","year":"2012","journal-title":"IEEE Trans. Signal Process."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"5","DOI":"10.1109\/JSTSP.2010.2093210","article-title":"Advances in Cognitive Radio Networks: A Survey","volume":"5","author":"Wang","year":"2011","journal-title":"Sel. Top. Signal Process."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"395","DOI":"10.1109\/TVT.2012.2219568","article-title":"Efficient Resource Allocation in a Rateless-Coded MU-MIMO Cognitive Radio Network with QoS Provisioning and Limited Feedback","volume":"62","author":"Chen","year":"2013","journal-title":"IEEE Trans Veh. Technol."},{"key":"ref_9","unstructured":"Zhang, H., Zhang, Z., and Chau, Y. (2011, January 10\u201315). Distributed compressed wideband sensing in Cognitive Radio Sensor Networks. Proceedings of the 2011 IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS), Shanghai, China."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"18012","DOI":"10.3390\/s150818012","article-title":"Energy-Efficient Channel Handoff for Sensor Network-Assisted Cognitive Radio Network","volume":"15","author":"Muhammad","year":"2015","journal-title":"Sensors"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"3928","DOI":"10.1109\/TVT.2013.2258952","article-title":"An Efficient MAC Protocol with Selective Grouping and Cooperative Sensing in Cognitive Radio Networks","volume":"62","author":"Liu","year":"2013","journal-title":"IEEE Trans. Veh. Technol."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Maharjan, S., Zhang, Y., Yuen, C., and Gjessing, S. (2011, January 17\u201322). Distributed Spectrum Sensing in Cognitive Radio Networks with Fairness Consideration: Efficiency of Correlated Equilibrium. Proceedings of the 2011 IEEE 8th International Conference on Mobile Adhoc and Sensor Systems (MASS), Valencia, Spain.","DOI":"10.1109\/MASS.2011.143"},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Maharjan, S., Yuen, C., Chew, H.Y., Zhang, Y., and Gjessing, S. (2010, January 7\u201310). Distributed spectrum sensing for cognitive radio networks with heterogeneous traffic. Proceedings of the 2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL), Rome, Italy.","DOI":"10.1109\/ISABEL.2010.5702849"},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Chen, L., Chen, W., and Zhang, X. (2009, January 20\u201323). Analysis and simulation for spectrum aggregation in LTE-advanced system. Proceedings of the 70th Vehicular Technology Conference Fall (VTC 2009-Fall), Anchorage, AK, USA.","DOI":"10.1109\/VETECF.2009.5378825"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"745","DOI":"10.1109\/SURV.2013.101813.00275","article-title":"A Survey of Radio Resource Management for Spectrum Aggregation in LTE-Advanced","volume":"16","author":"Lee","year":"2014","journal-title":"IEEE Commun. Surv. Tutor."},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Zhang, L., Liu, F., Huang, L., and Wang, W. (2010, January 28\u201330). Traffic load balance methods in the LTE-advanced system with carrier aggregation. Proceedings of the 2010 International Conference on Circuits and Systems (ICCCAS), Chengdu, China.","DOI":"10.1109\/ICCCAS.2010.5582048"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"612","DOI":"10.1049\/iet-com.2010.0300","article-title":"Performance analysis on carrier scheduling schemes in the long-term evolution-advanced system with carrier aggregation","volume":"5","author":"Zhang","year":"2011","journal-title":"IET Commun."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"1780","DOI":"10.1109\/TWC.2010.05.091310","article-title":"Carrier load balancing and packet scheduling for multi-carrier systems","volume":"9","author":"Wang","year":"2010","journal-title":"IEEE Trans. Wirel. Commun."},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Wang, Y., Pedersen, K., and Mogensen, P. (2009, January 13\u201316). Carrier load balancing methods with bursty traffic for LTE-advanced systems. Proceedings of the 2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications, Tokyo, Japan.","DOI":"10.1109\/PIMRC.2009.5450152"},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Meucci, F., Cabral, O., Velez, F.J., Mihovska, A., and Prasad, N.R. (2009, January 9\u201310). Spectrum aggregation with multi-band user allocation over two frequency bands. Proceedings of the IEEE Mobile WiMAX Symposium, Napa Valley, CA, USA.","DOI":"10.1109\/MWS.2009.25"},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Wang, H., Rosa, C., and Pedersen, K.I. (2011, January 5\u20138). Performance analysis of downlink inter-band carrier aggregation in LTE-advanced. Proceedings of the 2011 IEEE Vehicular Technology Conference (VTC Fall), San Francisco, CA, USA.","DOI":"10.1109\/VETECF.2011.6092836"},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Wang, Y., Pedersen, K.I., Mogensen, P.E., and Sorensen, T.B. (2009, January 13\u201316). Resource allocation considerations for multi-carrier LTE-advanced systems operating in backward compatible mode. Proceedings of the 2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications, Tokyo, Japan.","DOI":"10.1109\/PIMRC.2009.5450150"},{"key":"ref_23","unstructured":"Holtzman, J. (October, January 30). Asymptotic analysis of proportional fair algorithm. Proceedings of the 2001 12th International Symposium on Personal, Indoor and Mobile Radio Communications, San Diego, CA, USA."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Chung, Y.L., Jang, L.J., and Tsai, Z. (2011, January 9\u201312). An efficient downlink packet scheduling algorithm in LTE-advanced systems with carrier aggregation. Proceedings of the 2011 IEEE Consumer Communications and Networking Conference (CCNC), Las Vegas, NV, USA.","DOI":"10.1109\/CCNC.2011.5766558"},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Wang, Y., Pedersen, K., and Sorensen, T. (2011, January 15\u201318). Utility maximization in LTE-advanced systems with carrier aggregation. Proceedings of the 2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), Yokohama, Japan.","DOI":"10.1109\/VETECS.2011.5956494"},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Zhang, L., Wang, Y.Y., and Huang, L. (2009, January 7\u20139). Qos performance analysis on carrier aggregation based LTE-A systems. Proceedings of the IET International Communication Conference on Wireless Mobile and Computing (CCWMC 2009), Shanghai, China.","DOI":"10.1049\/cp.2009.1938"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"3516","DOI":"10.1587\/transcom.E92.B.3516","article-title":"Performance evaluation of carrier aggregation for elastic traffic in LTE-advanced systems","volume":"92","author":"Lei","year":"2009","journal-title":"IEICE Trans. Commun."},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Shi, S.S., Feng, C.Y., and Guo, C.L. (2009, January 18\u201320). A resource scheduling algorithm based on user grouping for LTE-advanced system with carrier aggregation. Proceedings of the International Symposium on Computer Network and Multimedia Technology, Wuhan, China.","DOI":"10.1109\/CNMT.2009.5374801"},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Wang, H., Rosa, C., and Pedersen, K. (2010, January 6\u20139). Performance of uplink carrier aggregation in LTE-advanced systems. Proceedings of the 2010 IEEE 72nd Vehicular Technology Conference Fall (VTC 2010-Fall), Ottawa, ON, USA.","DOI":"10.1109\/VETECF.2010.5594543"},{"key":"ref_30","unstructured":"Yong, X., Forde, T., Macaluso, I., DaSilva, L.A., and Doyle, L. (2012, January 3\u20137). Spatial spectrum sharing-based carrier aggregation for heterogeneous networks. Proceedings of the 2012 IEEE Global Communications Conference (GLOBECOM), Anaheim, CA, USA."},{"key":"ref_31","unstructured":"Diego, N.J., Gerhard, B., and Bou, S.A. (2013, January 21\u201324). A Dynamic Spectrum Access Scheme for an LTE-Advanced HetNet with Carrier Aggregation. Proceedings of the 2013 9th International ITG Conference Systems, Communication and Coding (SCC), M\u00fcnchen, Germany."},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Li, C., Liu, W., and Liu, Q. (2014, January 6\u20139). Spectrum aggregation based spectrum allocation for cognitive radio networks. Proceedings of the 2014 IEEE Wireless Communications and Networking Conference (WCNC), Istanbul, Turkey.","DOI":"10.1109\/WCNC.2014.6952473"},{"key":"ref_33","unstructured":"Li, Y., Zhao, L., Wang, C., Daneshmand, A., and Liu, Q. (2012, January 16\u201320). Aggregation-based spectrum allocation algorithm in cognitive radio networks. Proceedings of the 2012 IEEE Network Operations and Management Symposium (NOMS), Maui, HI, USA."},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Lin, J., Shen, L., Bao, N., Su, B., Deng, Z., and Wang, D. (2011, January 4\u20137). Channel characteristic aware spectrum aggregation algorithm in cognitive radio networks. Proceedings of the 2011 IEEE 36th Conference on Local Computer Networks (LCN), Bonn, Germany.","DOI":"10.1109\/LCN.2011.6115528"},{"key":"ref_35","doi-asserted-by":"crossref","unstructured":"Sheng, F., Ma, L., Tan, X., Yin, C., and Yu, Y. (2013, January 21\u201323). Spectrum Allocation Algorithm Aware Spectrum Aggregation in Cognitive Radio Networks. Proceedings of the 2013 Third International Conference on Instrumentation, Measurement, Computer, Communication and Control (IMCCC), Shenyang, China.","DOI":"10.1109\/IMCCC.2013.24"},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Tan, X., Yin, C., and Ma, L. (2014, January 4\u20137). Positional Proportional Fairness Scheduling Based on Spectrum Aggregation in Cognitive Radio. Proceedings of the 2014 21st International Conference on Telecommunications (ICT), Lisbon, Portugal.","DOI":"10.1109\/ICT.2014.6845103"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"2015","DOI":"10.1109\/TCOMM.2015.2424239","article-title":"SACRP: A Spectrum Aggregation-Based Cooperative Routing Protocol for Cognitive Radio Ad-Hoc Networks","volume":"63","author":"Ping","year":"2015","journal-title":"IEEE Trans. Commun."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/15\/9\/23706\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T20:48:43Z","timestamp":1760215723000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/15\/9\/23706"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2015,9,17]]},"references-count":37,"journal-issue":{"issue":"9","published-online":{"date-parts":[[2015,9]]}},"alternative-id":["s150923706"],"URL":"https:\/\/doi.org\/10.3390\/s150923706","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2015,9,17]]}}}