Distributed Access Time Control for Per-Station Fairness in Infrastructure WLANs
Distributed Access Time Control for Per-Station Fairness in Infrastructure WLANs
复制标题
基础设施 WLAN 中每站公平性的分布式访问时间控制
DOI：
10.1093/ietcom/e89-b.9.2572
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Chong
中科院分区：
文献类型：
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作者：
Dong;Eun;Chong
摘要在使用分布式协调功能（DCF）的基础设施IEEE 802.11无线局域网中，不能支持上下行TCP流之间的公平性。为了解决这个问题，我们提出了分布式访问时间控制（DATC）方案，其中每个站点根据信道访问时间来控制其TCP流的速率。即使每个站的数据流的速率和方向不同，DATC方案也能提供每个站的公平性。该方案可以简单地在移动的站中实现，而不必修改接入点。研究了该方案的性质，并通过仿真验证了其有效性.关键词：无线局域网，TCP，公平性1.由于互联网已成为一个普通人的日常生活的重要组成部分，它必须在任何时间和任何地点访问。为了满足这样的公共需求，基于IEEE 802.11标准[1]的无线局域网（WLAN）被广泛地部署在诸如机场、咖啡馆、酒店等公共区域中。因此，由于大量的人通过WLAN [2]访问互联网，因此应该确保公平地向用户提供这样的服务。在802.11标准中，通过分布式协调功能（DCF）在媒体访问控制（MAC）层确保公平性，DCF的目的是向所有无线设备提供平等的访问机会。同时，另一个MAC层协议，即，点协调功能（PCF）为接入点（AP）提供了更多的控制，但只有少数WLAN设备支持PCF。无线局域网中的公平性问题已经得到了广泛的研究，但大多数研究都集中在增强DCF以实现MAC层的公平性[3]-[5]。虽然这些MAC层公平机制可以为每个站点提供公平的接入机会，但这些解决方案需要在MAC层进行更改，并且针对ad-hoc网络。因此，这些解决方案在基础设施WLAN中使用是不切实际的。在基础设施网络中，有必要在具有在不同方向上移动的多个数据流的站之间提供公平性。[6]显示出不公平是-
SUMMARY Fairness among uplink and downlink TCP flows can notbe supported in infrastructure IEEE 802.11 Wireless LANs using the dis-tributed coordination function (DCF). In order to resolve this problem, wepropose the Distributed Access Time Control (DATC) scheme, in whicheach station controls the rates of its TCP flows based on channel accesstime. The DATC scheme can provide per-station fairness even when thenumber and direction of flows in each station are different. This schemecan be simply implemented in mobile stations without having to modifythe access points. The properties of the proposed scheme are investigatedand its effectiveness is verified through simulations. key words: wireless LAN, TCP, fairness 1. Introduction As the Internet has become an essential part of the daily lifeof an ordinary man, it must be accessible at any time andat any place. To satisfy such public demand, wireless localarea networks (WLANs) based on IEEE 802.11 standard [1]are widely deployed in public areas such as airports, cafes,hotels, etc. Consequently, due to the large number of peopleaccessing the Internet via WLANs [2], it should be ensuredthat such services be provided to users fairly.In the 802.11 standard, fairness is assured at the MediaAccess Control (MAC) layer by the Distributed Coordina-tion Function (DCF), which aims to give equal access op-portunity to all wireless devices. Meanwhile, the other MAClayer protocol, i.e., the Point Coordinate Function (PCF),gives more control to an Access Point (AP), but there areonly a few WLAN devices that support PCF. The issue offairness in WLANs has been studied extensively, but most ofwhich have focused on the enhancement of DCF for fairnessat the MAC layer [3]–[5]. Although these MAC layer fair-ness mechanisms canprovide fair access opportunity to eachstation, these solutions require changes at the MAC layerand are targeted for ad-hoc networks. Therefore, these so-lutions are impractical to be used in infrastructure WLANs.In infrastructure networks, it is necessary to provide fairnessamong stations that have numerous flows moving in differ-ent directions.Bottigliengo et al.[6] showed that the unfairness be-
添加参数重构中方法参数的自动估计
DOI：
--
发表时间：
2022
期刊：
影响因子：
--
作者：
清水 一輝;柏 祐太郎;近藤 将成;亀井 靖高;鵜林 尚靖
通讯作者：
鵜林 尚靖