[2] [2] Wang H, Zhang P, Li J, et al. Radio Propagation and Wireless Coverage of LSAA-based 5G Millimeter-Wave Mobile Communication Systems［J］. China Communications, 2019, 16(5):1-18.

[4] [4] Rahmani B, Reza M, Aghdam G, et al. Energy Efficient Discontinuous Reception Strategy in LTE and beyond Using an Adaptive Packet Queuing Technique［J］. IET Communications,2020,14(18):3247-3255.

[5] [5] Yue W,Zhang Y,Jin S.Performance Evaluation for the Energy Saving Mode for DRX in LTE Systems［C］//ISORA 2013. Huangshan,China:ORSC,2013:1-5.

[6] [6] Maheshwari M K,Roy A,Saxena N.DRX over LAA-LTE - A New Design and Analysis based on Semi-Markov Model［J］. IEEE Transactions on Mobile Computing, 2019, 18(2):276-289.

[7] [7] Liu D, Wang C, Rasmussen L K. Discontinuous Reception for Multiple-Beam Communication［J］.IEEE Access,2019,7:46931-46946.

[8] [8] Maheshwari M K, Agiwal M, Saxena N, et al. Directional Discontinuous Reception (DDRX) for mmWave Enabled 5G Communications［J］.IEEE Transactions on Mobile Computing, 2019,18(10):2330-2343.

[9] [9] Ferng H W, Tseng Y T, Wang T H. Parameter-Adaptive Dynamic and Adjustable DRX Schemes for LTE/LTE-A［J］. IEEE Transactions on Green Communications and Networking, 2019,3(4):1035-1043.

[10] [10] Sharma L, Kumar B B, Wu S L. Performance Analysis and Adaptive DRX Scheme for Dual Connectivity［J］. IEEE Internet of Things Journal, 2019,6(6):10289-10304.

[11] [11] Koc A T, Jha S C, Vannithamby R, et al. Device Power Saving and Latency Optimization in LTE-A Networks Through DRX Configuration［J］.IEEE Transactions on Wireless Communications,2014,13(5):2614-2625.