Migrating plan for LTT company network from WiMAX to LTE

Unlimited voice services no longer command premium pricing, but are viewed as “table stakes” in a broader service offering that must now include multimedia (voice, data, video) communications with a mobility component. As a result of this shift, many service providers are trying to adopt, Long Term Evolution (LTE) network strategy to deliver this multimedia experience to their subscribers [1]. Today, WiMAX adopters are looking to migrate their network to the more broadly adopted LTE model. The main ISP Company in Libya is the Libyan Telecom and Technology (LTT) Company, which is adopting WiMAX system. The objective of this work is to propose a migration plan for the existing WiMAX network of the LTT Company towards a LTE network. The migration was suggested, within the possible resources under the current circumstances, minimum additional equipment, utilizing the same frequency band, Bandwidth, and the same TDD technology. Different scenarios were suggested for the transition period where both networks the WiMAX and the LTE will be working simultaneously. These scenarios were compared, evaluated and the best one was selected. The main outcome of the system design shows that; a new Evolved Packet Core equipment, which represents the core network for the LTE, should be added since the core of the two networks are different and not supported by each other. Also an extra Radio Remote Unit RRU should be added in the congested cells. In addition; it has to replacing the entire WiMAX subscriber terminal with new LTE ones. The overall expecting time to finish the all changes is less than one year.