Call admission control for IEEE 802.11 contention access mechanism
نویسندگان
چکیده
This paper proposes an admission control algorithm that enables the upcoming IEEE 802.11e contention based Enhanced Distributed Channel Access (EDCA) to provide quantitative bandwidth guarantees for Wireless Local Area Networks (WLANs), rather than a relative prioritized service. The algorithm estimates the throughput that flows would achieve if a new flow with certain parameters was admitted, and so indicates whether such a new flow can be admitted while preserving the Quality of Service (QoS) of existing flows. The algorithm deals with the EDCA parameters of minimum contention window size and transmission opportunity duration, and indicates what values should be used for different flows. Simulation results confirm the accuracy of the throughput estimates and the effectiveness of the admission control algorithm.
منابع مشابه
Soft-Guarantee-Based Call Admission Control for IEEE 802.11 Wireless LANs
IEEE 802.11 MAC protocol is a well-known method used in Wireless LANs (WLANs). However, it provides poor QoS guarantee for time sensitive traffic such as media streaming, or high priority traffic such as voice/video signaling requests. For improving the QoS guarantee of communications, call admission control (CAC) is important for access point’s (AP’s) point coordination function (PCF). In this...
متن کاملAn Efficient Multipolling Mechanism for IEEE 802.11 Wireless LANs
To expand the support for applications with QoS requirements in Wireless Local Area Networks (WLANs), the 802.11E task group was formed to enhance the current IEEE 802.11 Medium Access Control (MAC) protocol. The multipolling mechanism was discussed in the task group, but some problems remain unsolved. In this paper, we show a novel design of the multipolling mechanism with the advantages of hi...
متن کاملAn Improved Data Flushing MAC Protocol for IEEE 802.11 Wireless Ad Hoc Network
In this paper, we propose a data flushing data transfer (DFDT) protocol. The distributed coordinate function (DCF) of IEEE 802.11 supports data transmissions using the data-ACK method and the request-to-send/clear-to-send (RTS/CTS) method. The data-ACK method has low protocol overhead, however, the transmissions are prone to collision. Although the RTS/CTS mechanism reduces the probability of c...
متن کاملDesign and Performance Evaluation of an Asymptotically Optimal Backoff Algorithm for IEEE 802.11 Wireless LANs
This paper presents and evaluates a distributed mechanism for the contention control in IEEE 802.11 Wireless LANs. Specifically, our mechanism named Asymptotically Optimal Backoff (AOB), dynamically adapts the backoff window size to the current load. AOB guarantees that an IEEE 802.11 WLAN asymptotically (i.e. for a large number of active stations) achieves its optimal channel utilization. The ...
متن کاملOn the Performance Behavior of IEEE 802.11 Distributed Coordination Function
The basis of the Medium Access Control (MAC), proposed in IEEE 802.11 standard for wireless local area networks, is the Distributed Coordination Function (DCF). DCF uses Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) to resolve contention between wireless stations and to verify successful transmissions. In this work we present an analytical model of the IEEE 802.11 MAC protoco...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2003