一种采用两级缓冲调度区分业务的帧聚合策略

何蓉; 方旭明

doi:10.3724/SP.J.1146.2010.00276

一种采用两级缓冲调度区分业务的帧聚合策略

doi: 10.3724/SP.J.1146.2010.00276

何蓉^*方旭明,,
方旭明

基金项目:

国家自然科学基金(60772085)资助课题

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出版历程
- 收稿日期: 2010-03-23
- 修回日期: 2010-06-29
- 刊出日期: 2011-01-19

A Frame Aggregation Scheme with Two-level Buffer Mechanism and Service Differentiation

He Rong^{*方旭明
,},
Fang Xu-Ming

摘要

摘要: 帧聚合是改善无线MAC(Media Access Control)协议信道利用率，提高频谱效率的有效手段之一。该文针对多业务场景，采用两级缓冲区调度策略，按照不同聚合权重因子对各队列轮询聚合。根据各个队列的包超时紧迫因子动态调整各队列的聚合权重，以满足各QoS等级业务的时延限制。该文还将排队论模型引入到帧聚合策略的性能分析中，建立了系统的数学分析模型，定量分析了主要性能参数与系统负载的关系。通过与IEEE 802.11n标准中定义的两层帧聚合策略比较表明，该文提出的帧聚合策略的性能优于IEEE 802.11n两层帧聚合策略。
- 无线通信 /
- 帧聚合 /
- 缓冲区调度 /
- QoS /
- 区分业务
Abstract: Frame aggregation is one of the efficient methods to improve wireless channel utility of MAC (Media Access Control) and spectral efficiency. Aiming at multi-services, this paper adopts two-level buffer mechanism and polls each queue for aggregation according to aggregation weight factor. The aggregation weight factor of each queue is dynamically adjusted based on the packet overtime urgent factor defined to meet with the delay requirement of each QoS type of service. This paper introduces queue theory into the performance analysis of frame aggregation scheme. A mathematical analysis model is set up. Additionally, the relationship of main performance parameters and system load is quantificationally analyzed. Compared with the performance of the two-level aggregation scheme defined in IEEE 802.11n standard, the proposed scheme indicates the performance of the new frame aggregation scheme is more efficient than the two-level aggregation scheme defined in 802.11n standard.
- Wireless communication /
- Frame aggregation /
- Buffer management /
- QoS /
- Differentiated services

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参考文献(1)

[1] IEEE Standard for information technology- telecommunications and information exchange between systems-local and metropolitan area networks-specific requirements, part11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications, Amendment 5: Enhancements for Higher Throughput. October 2009. [2] Kim Seongkwan, Choi Sunghyun, and Kim Youngsoo, et al.. MCCA: a high-throughput MAC strategy for next-generation WLANs. IEEE Wireless Communications, 2008, 15(1): 32-39. [3] Hoefel Roger Pierre Fabris. Frame aggregation and concatenation schemes for IEEE EDCF 802.11e: a first order MAC and PHY cross-layer model to estimate the throughput. IEEE VTC, Barcelona, April 26-29, 2009: 1-5. [4] Kuppa Srikant and Dattatreya G R. Modeling and analysis of frame aggregation in unsaturated WLANs with finite buffer stations. IEEE International Conference on Communications, Istanbul, June 2006: 967-972. [5] Ciftcioglu Ertugrul Necdet and Gurbuz Ozgur. Access scheduling based on time water-filling for next generation wireless LANs. IEEE Vehicular Technology Conference, Dublin, April 2007: 2966-2970. [6] Skordoulis Dionysios, Ni Qiang, and Chen Hsiao-hwa. IEEE 802.11n MAC frame aggregation mechanisms for next- generation high-throughput WLANS. IEEE Wireless Communications, 2008, 15(1): 40-47. [7] Fasolo E, Rossi M, Widmer J, and Zorzi M. In-network aggregation techniques for wireless sensor networks: a survey. IEEE Wireless Communications, 2007, 14(2): 70-87. [8] Mahmud S A, Khan S, and Ni Qiang, et al.. Capacity issues in meshed high data rate WPANs. 22nd International Conference on Advanced Information Networking and Applications, Okinawa, 2008: 1285-1290. [9] Yun Sangki, Kim Hyogon, and Lee Heejo. 100+ VoIP calls on 802.11b: the power of combining voice frame aggregation and uplink-downlink bandwidth control in wireless LANs. IEEE Journal on Selected Areas in Communications, 2007, 25(4): 689-697. [10] Ashtaiwi A and Hassanein H. Utilizing IEEE 802.11n to enhance QoS support in wireless mesh networks. 33rd IEEE Conference on Local Computer Networks. Montreal, Que. October 2008: 689-696. [11] 《运筹学》教材编写组. 运筹学. 清华大学出版社, 2005年6月: 301-340. [12] 王思明, 汪虹. 批量服务容量有限的多队列循环系统. 系统工程理论与实践, 1998, (9): 100-109. Wang Si-ming and Wang Hong. Multi queue cyclic system of batch service and finite capacity[J].System Engineering Theory Practice.1998, (9):100-109

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