Providing Services for the High-Speed Train and Local Users in the Same OFDMA System: Resource Allocation in the Downlink

Zhang Chuang; Fan Pingyi

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Providing Services for the High-Speed Train and Local Users in the Same OFDMA System: Resource Allocation in the Downlink

機譯：在同一OFDMA系統(tǒng)中為高速列車和本地用戶提供服務：下行鏈路中的資源分配

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We consider providing broadband wireless services for passengers in a high-speed train and local users (low-mobility users) in the same OFDMA system. For the train, a two-hop architecture, under which, passengers communicate with base stations (BSs) via a mobile relay (MR) is employed. Then all passengers in the train can be treated as one large user represented by the MR. Since the channel conditions of the MR and local users are different in both large scale-fading and small-scale fading, we allocate the system resources over two time-scales for them. We formulate the resource allocation problem in the downlink OFDMA system as a capacity optimization problem for the MR subject to the sum capacity constraint of local users. We discuss the problem in two cases where perfect intercarrier interference (ICI) cancellation and no ICI cancellation are applied at the MR. The corresponding capacities and optimal power and subcarrier allocation (OPSA) policies are presented for each case. The capacities obtained in these two cases bound the achievable transmission rate of the MR and provide meaningful guidance for the application of ICI cancellation. Finally, the implementation issues of resource allocation policies are discussed to simplify application in practical scenarios.

機譯：我們考慮為高速火車上的乘客和同一OFDMA系統(tǒng)中的本地用戶（低移動性用戶）提供寬帶無線服務。對于火車，采用兩跳架構，在該架構下，乘客通過移動中繼（MR）與基站（BS）通信。然后，可以將火車上的所有乘客視為MR代表的一個大用戶。由于MR和本地用戶的信道條件在大范圍衰落和小范圍衰落方面都不同，因此我們在兩個時間尺度上為它們分配系統(tǒng)資源。我們將下行OFDMA系統(tǒng)中的資源分配問題表述為受本地用戶總容量約束的MR容量優(yōu)化問題。我們討論了兩種情況下的問題，其中在MR處應用了完美的載波間干擾（ICI）抵消而沒有ICI抵消。針對每種情況，介紹了相應的容量以及最佳功率和子載波分配（OPSA）策略。在這兩種情況下獲得的容量限制了可實現(xiàn)的MR傳輸速率，并為ICI消除的應用提供了有意義的指導。最后，討論了資源分配策略的實現(xiàn)問題，以簡化在實際方案中的應用。

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《Wireless Communications, IEEE Transactions on》 |2016年第2期|1018-1030|共13頁
作者
Zhang Chuang; Fan Pingyi;
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State Key Laboratory on Microwave and Digital Communications, Tsinghua University, Beijing, China;

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正文語種 eng
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關鍵詞
Doppler spread; OFDMA; Resource allocation; inter-carrier interference; intercarrier interference; mobile relay; resource allocation;

機譯：多普勒擴展;OFDMA;資源分配;載波間干擾;載波間干擾;移動中繼;資源分配;

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1. Scheduling and Resource Allocation in Downlink Multiuser MIMO-OFDMA Systems [J] . Guillem Femenias, Felip Riera-Palou IEEE Transactions on Communications . 2016,第5期

機譯：下行多用戶MIMO-OFDMA系統(tǒng)中的調度和資源分配
2. Dynamic Resource Allocation for Downlink Multiuser MIMO-OFDMA/SDMA Systems [J] . Chongxian Zhong, Luxi Yang, Mingli You Circuits, systems and signal processing . 2010,第6期

機譯：下行多用戶MIMO-OFDMA / SDMA系統(tǒng)的動態(tài)資源分配
3. Novel resource allocation algorithms for multiuser downlink MIMO-OFDMA of FUTURE B3G systems [J] . Qiaoyun Sun, Hui Tian, Shuang Wang, 自然科學進展：英文版 . 2009,第009期

機譯：未來B3G系統(tǒng)多用戶下行MIMO-OFDMA的新型資源分配算法
4. Downlink resource allocation for the high-speed train and local users in OFDMA systems [C] . Chuang Zhang, Pingyi Fan, Ke Xiong IEEE Wireless Communications and Networking Conference . 2015

機譯：OFDMA系統(tǒng)中用于高速列車和本地用戶的下行鏈路資源分配
5. Downlink Radio Resource Allocation Schemes in OFDMA Based Cellular Systems. [D] . Huo, Changqin. 2010

機譯：基于OFDMA的蜂窩系統(tǒng)中的下行鏈路無線資源分配方案。
6. Rate Adaptive Based Resource Allocation with Proportional Fairness Constraints in OFDMA Systems [O] . Zhendong Yin, Shufeng Zhuang, Zhilu Wu, 2015

機譯：OFDMA系統(tǒng)中具有比例公平約束的基于速率自適應的資源分配
7. Resource Allocation for Multi-User Downlink MISO OFDMA-URLLC Systems [O] . Walid R. Ghanem, Vahid Jamali, Yan Sun, 2020

機譯：多用戶下行MISO的資源分配OFDMA-URLLC系統(tǒng)

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Providing Services for the High-Speed Train and Local Users in the Same OFDMA System: Resource Allocation in the Downlink

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