Abstract
It is still a difficult problem to allocate wireless resources for uplink transmission in LTE system. The main goals of previous researches aim at maximizing system throughput or fairness among UEs. However, the real requirements of UEs are not considered. The result is that Resource Blocks (RB) allocated by eNB are usually wasted and the requirements of UEs are not satisfied. We presented an AAG-2 scheduling scheme, which can ensure the QoS of GBR bearers, while at the same time efficiently distributes RBs to non-GBR bearers so as to improve resource utilization. However, in order to facilitate the management for many bearers, 3GPP suggested divide bearers into four Logical Channel Groups (LCG), rather than only two kinds of bearers mentioned above. So far, 3GPP has not specified how to map between LCG and bearers of different QoS Class Identifiers (QCIs), but left it to the operator for customization. As a result, it is an important issue about how to group bearers and how to guarantee QoS, while make good use of free RB. In this paper, we propose a new-version of AAG-2, named AAG-LCG, where bearers are classified into four LCGs with different priority levels. Especially, with the proposed scheme, eNB can efficiently allocate RBs to meet the QoS requirements of different LCG bearers, while also maintain sound overall system performance.
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Acknowledgments.
This paper is supported by Ministry of Science and Technology of Taiwan under grant no. 104-2221-E-197-007, 104-2221-E-197-009, 104-2221-E-197-016. The authors also would like to thank Shing-Jye Huang, who helped the simulation work.
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© 2017 ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
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Kuo, FC., Tseng, CC., Ting, KC., Wang, HC. (2017). Resource Allocation Scheme for LTE Uplink Transmission Based on Logical Channel Groups. In: Lee, JH., Pack, S. (eds) Quality, Reliability, Security and Robustness in Heterogeneous Networks. QShine 2016. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 199. Springer, Cham. https://doi.org/10.1007/978-3-319-60717-7_35
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DOI: https://doi.org/10.1007/978-3-319-60717-7_35
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