Detach CTS for active load balancing in 802.11 networks

Abstract

Transmit power reduction is the most common algorithm to achieve load balancing in either 802.11 or cellular networks. The method does not require changes in the user terminal; however, the method requires access point (AP) to have a multi-level front-end power amplifier so that transmission power can be adjusted accordingly. Transmit power reduction also removes the quality of services that may be applied to some users. Such flaws may contradict the value-added services offered by certain access points or cellular base stations. This paper proposes a simple method to avoid power reduction in 802.11 networks. Load balancing is achieved by ordering disconnection for unwanted users by sending a detach clear to send (CTS) signal in response to a request to transmit (CTS) sent by users. Although it violates the standard Ethernet algorithm, it may be applicable in the future standard. By receiving detect CTS, the user is simply disconnected to existing AP and finding the alternative AP. Simulation evaluations show that the method successfully maintains the average throughput as well as maintains the possible prioritized users.