User in the Loop: Mobility Aware Users Substantially Boost Spectral Efficiency of Cellular OFDMA Systems

Abstract

Abstract-Wireless cellular networks perform with a system spectral efficiency which depends on the user terminal distribution over the cell area. Due to an adaptive modulation and coding scheme which depends on the signal-to-interference+noise (SINR) ratio, the achievable data rate is typically an order of magnitude higher in the cell center compared to the cell edge. The performance of IMT-Advanced cellular radio systems like IEEE 802.16m and 3GPP LTE-A will strongly depend on algorithms to cope with the low SINR in the service area. The new paradigm introduced in this paper motivates users to opportunistically change location according to operator recommendation displayed on the user terminal to achieve a much better SINR than currently available. Benefits are the increase of network capacity and higher data rates or potentially a financial incentive for the convinced users. Numeric results based on analysis of IMT scenarios are provided suggesting large cell spectral efficiency gains.

Economics of user-in-the-loop demand control with differentiated QoS in cellular networks

“…The closed loop control of user behavior for either a spatial or a temporal user reaction is called user in the loop (UIL) [5]. The user is part of a closed loop control system ( Figure 1).…”

“…The user receives hints and incentives or penalties (quantified user information, QUI) in order to convince him to deviate from the default behavior (which is uncontrolled, open loop). The outcome is the user moving from one location to a better one [5] or postponing session traffic out of the busy hours [6].…”

“…Spatial UIL control has been treated in [5], [8], [9], providing substantial gains in spectral efficiencyγ. Recent survey results support the assumptions [10], [11].…”

“…In this paper, the solution approach is user-in-the-loop (UIL). Previous work [5], [6] has shown that influencing the user behavior is a promising approach with substantial gains in spectral efficiency and successful congestion mitigation. Dynamic usage-based tariffs are controlled in a closed loop including the user.…”

Green communications by demand shaping and user-in-the-loop tariff-based control

“…The concept of user-in-the-loop was developed to control the user behavior in a wireless network so that a higher goal was achieved [9]. This goal can be the total spectral efficiency of a cellular network by convincing users to move from one location to a better one [10] or to postpone their use case out of the busy hour.…”