家用基地台系統之無線資源配置

Radio Resources Allocation for Broadband Cellular System with Femtocells

龍柏村(Po-tsun Lung)

指導教授 ： 沈文和

朝陽科技大學/資訊學院/資訊與通訊系碩士班/碩士(2012年)

摘要

第四代行動通訊系統將在高速移動環境中提供高達100Mbps的服務速率，在低移動速率或是固定區域環境中提供高達1GBbps的服務速率。第四代行動通訊系統由於對傳輸率、頻譜使用效率及系統涵蓋率的高度要求，在系統設計上會與傳統行動通訊系統有所不同，其中包括大量佈設家用基地台(Femtocell)以改善室內無線傳輸訊號嚴重衰減的問題，家用基地台可以被視為低功率、低成本和簡單設定的家用極小型基地台，利用寬頻有線網路提供小範圍的高速無線網路傳輸服務。如何在現有的大基地台行動通訊系統網路環境下佈設家用基地台以達到最高的訊號品質與系統容量，在大基地台與家用基地台間、家用基地台與家用基地台間如何做最有效的頻譜共享、干擾管理以及無線資源分配的皆是非常重要的關鍵技術。

本論文探討在下世代行動通訊系統網路環境中家用基地台與家用基地台之間的無線資源分配；提出三種不同的系統頻譜資源分配方法，經由不同的家用基地台佈建密度與子載波可用數，觀察使用者在不同的無線資源分配方法下的分配效能，系統傳輸量的差異程度。

關鍵字

無線資源分配 ； 家用基地台 ； 第四代行動通訊系統

並列摘要

The fourth-generation (4G) mobile communications system is envisioned to provide up to 100Mbps data-rate services for high mobility users and up to 1Gbps for low-mobility users, anytime and anywhere. Due to the very demanding requirements on transmission rate, spectrum efficiency and coverage, the system design of the 4G system is very different from the traditional mobile communication systems, including the deployment of a large number of home base stations (Femtocells) for the indoor coverage. A femtocell can be regarded as a very simple, low-power, low-cost home base station which uses the high-speed wired network in the backbone to provide high-speed wireless internet services in the indoor environment. The key challenges in the design of femtocell system include: (i) how to deploy femtocells in the existing mobile communication systems so that the highest signal quality and system capacity can be achieved? (ii) how to make the most effective spectrum sharing between the macrocells and the femtocells, and (iii) how to carry out the interference management and allocation of radio resources in an effective way. This thesis investigates the issue of resource allocation between femtocells. Three new resource allocation methods are proposed, including the method based on maximum received SINR, the method with no drop and the method based on femtocell measurements. The performance of the proposed methods are analyzed and compared with extensive simulations. The results show that the proposed methods provide a good trade-off between performance and complexity.

並列關鍵字

Femtocell ； Resource allocation ； Fourth-generation mobile communications systems

參考文獻

[3] "WiMAX and the IEEE 802.16m Air Interface Standard". WiMax Forum. 4 April 2010.

[6] David Lopez-Perez, Alvaro Valcarce, Guillaume de la Roche, and Jie Zhang, "OFDMA femtocells: A roadmap on interference avoidance," IEEE Communications Magazine, 2009, Vol. 47, Issue. 9, pp. 41-48.

[11] A. Saleh, A. Rustako, and R. Roman, "Distributed Antennas for Indoor Radio Communication," IEEE Transactions on Communications, Vol. 35, no.12, pp. 1245-1251, Dec. 1987.

[12] Ji-Hoon Yun, and Kang G. Shin, "Adaptive Interference Management of OFDMA Femtocells for Co-Channel Deployment," IEEE Journal on Selected Areas in Communications, Vol. 29, Issue. 6, pp. 1225-1241, June 2011.

[13] Mustafa E. Şahin, Ismail Guvenc, Moo-Ryong Jeong, and Huseyin Arslan, "Handling CCI and ICI in OFDMA femtocell networks through frequency scheduling," IEEE Transactions on Consumer Electronics, Vol. 55, Issue. 4, pp. 1936-1944, November 2009.