同频同时全双工（FD）通信由于其理论上可以提高一倍的频谱效率而获得了广泛关注。但是在全双工蜂窝网中，严重的小区间干扰极大地影响了系统性能。为了缓解严重的干扰，提高系统频谱效率，该文提出了一种部分全双工资源分配方案。该方案将时频资源划分为全双工资源块和半双工资源块，然后根据所服务用户的信道信息对时频资源进行分配，针对Wyner一维系统模型，将用户按其所处位置进行划分和资源分配，推导了不同划分门限下系统的频谱效率，得到了最优划分距离。仿真结果表明：相比完全全双工和完全半双工通信，部分全双工能够有效提高系统的频谱效率。
In-band full duplex (FD) communications are attracting more attention due to their potential to double the spectral efficiency (SE). However, severe inter-cell interference will degrade the system performance. A fractional FD (FFD) resource allocation strategy was developed to reduce the effect of severe interference in the system SE. The radio resources are first classified into FD resource blocks and half duplex resource blocks with all the blocks allocated to the users based on the channel condition of each user. The Wyner model was used to evaluate the system performance. The user positions were used to partition the resource blocks and as the user classification criterion. Simulate SE and optimal partition radii for different classification thresholds show that this method can significantly improve the system SE.
[1] Hossain E, Hasan M. 5G cellular:Key enabling technologies and research challenges[J]. IEEE Instrumentation & Measurement Magazine, 2015, 18(3):11-21.[2] Zhao C, Xiao L, Kang S, et al. Secure relay selection based on learning with negative externality in wireless networks[J]. EURASIP Journal on Advances in Signal Processing, 2013(1):89.[3] Sabharwal A, Schniter P, Guo D, et al. In-band full-duplex wireless:Challenges and opportunities[J]. IEEE Journal on Selected Areas in Communications, 2014, 32(9):1637-1652.[4] Bharadia D, McMilin E, Katti S. Full duplex radios[J]. ACM Computer Communication Review, 2013, 43(4):375-386.[5] Duarte M, Dick C, Sabharwal A. Experiment-driven characterization of full-duplex wireless systems[J]. IEEE Transaction on Wireless Communnications, 2012, 11(12):4296-4307.[6] Liao Yun, Song Lingyang, Han Zhu, et al. Full duplex cognitive radio:A new design paradigm for enhancing spectrum usage[J]. IEEE Communications Magazine, 2015, 53(5):138-145.[7] Liu Gang, Yu F, Ji Hong, et al. In-band full-duplex relaying:A survey, research issues and challenges[J]. IEEE Communications Surveys Tutorials, 2015, 17(2):500-524.[8] Riihonen T, Werner S, Wichman R. Hybrid full-duplex/half-duplex relaying with transmit power adaptation[J]. IEEE Transactions on Wireless Communications, 2011, 10(9):3074-3085.[9] Ahmed E, Eltawil A, Sabharwal A. Rate gain region and design tradeoffs for full-duplex wireless communications[J]. IEEE Transactions on Wireless Communications, 2013, 12(7):3556-3565.[10] Chai Xiaomeng, Liu Tong, Xing Chengwen, et al. Throughput improvement in cellular networks via full-duplex based device-to-device communications[J]. IEEE Access, 2016, 4(1):7645-7657.[11] Goyal S, Liu Pei, Panwar S, et al. Full duplex cellular systems:Will doubling interference prevent doubling capacity[J]. IEEE Communications Magazine, 2015, 53(5):121-127.[12] Nguyen D, Tran L, Pirinen P, et al. On the spectral efficiency of full-duplex small cell wireless systems[J]. IEEE Transactions on Wireless Communications, 2014, 13(9):4896-4910.[13] Shao Shihai, Liu Donglin, Deng Kai, et al. Analysis of carrier utilization in full-duplex cellular networks by dividing the co-channel interference region[J]. IEEE Communications Letters, 2014, 18(6):1043-1046.[14] Thomsen H, Popovski P, Carvalho E, et al. Compex:Comp for in-band wireless full duplex[J]. IEEE Wireless Communications Letters, 2016, 5(2):144-147.[15] Lee J, Quek T. Hybrid full-/half-duplex system analysis in heterogeneous wireless networks[J]. IEEE Transactions on Wireless Communications, 2015, 14(5):2883-2895.[16] AlAmmouri A, ElSawy, Amin H, et al. In-band alpha-duplex scheme for cellular networks:A stochastic geometry approach[J]. IEEE Transactions on Wireless Communications, 2016, 15(10):6797-6812.[17] TSG-RAN G. Further Advancements for E-UTRA Physical Layer Aspects 3G TR 36.814 v9. 0.0[R]. New York, USA:3GPP, 2010.
