King's College London
This paper investigates the energy savings a cellular operator can achieve in the access network by dynamically offloading users or traffic loads to Wi-Fi networks. The method used to analyze energy savings is presented, followed by detailed simulations using different traffic types. Results show that significant savings of up to 65-70% can be achieved by opportunistically powering down cellular radio network equipment as facilitated by the offloading of users to Wi-Fi. The next generation of wireless communications networks is focusing on integration of wireless local area networks (e.g., Wi-Fi networks) with mobile cellular networks (e.g., UMTS, HSPA, LTE etc) to utilize the combined benefits of both technologies.