A delay monitoring method for up-link flows in IEEE 802.11e EDCA networks

ABSTRACT

We present an analytical framework to model the sending queue of an IEEE 802.11 EDCA wireless station that uses the TXOP_limit MAC parameter to send more than one packet in each transmission opportunity. An application of this model to the estimate of packet delay from the number of packets received at the AP in each transmission is presented. This method is well suited to be deployed in an infrastructured WLAN but can be used for any wireless communication based on the EDCA access mechanism. Its main advantage is that it requires neither modifications to the MAC protocol nor cooperation of the wireless STAs. The approach suitability to predict the delay of real time VoIP calls is validated through simulation.

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INDEX TERMS

Primary Classification:
  C. Computer Systems Organization
  C.2 COMPUTER-COMMUNICATION NETWORKS
      C.2.3 Network Operations
          Subjects: Network monitoring

Keywords:
EDCA, communication networks, performance monitoring, wireless LANs