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Thursday, December 22, 2011

Guidelines for LTE Backhaul Traffic Estimation


The new LTE mobile broadband standard promises significantly higher data rates for consumers than current HSPA technology, and at a significantly lower cost per bit for the Operator. Field tests show that end user download rates in excess of 150Mbps are achievable where conditions allow. While this seems like great news for the end users, there are concerns in the operator community on how to backhaul what initially appears to be vast volumes of data: If just one user can download at 150Mbps, what is the total backhaul traffic from a multi-cell base station supporting tens of users?


This paper answers this question by considering the total user traffic that LTE base stations can handle both during the busy hours and in the quiet times. A model is developed to predict traffic levels in transport networks used to backhaul LTE eNodeBs. Backhaul traffic is made up of a number of different components of which user plane data is the largest, comprising around 80-90% of overall traffic, slightly less when IPsec encryption is added. The remainder consists of the transport protocol overhead and traffic forwarding to another base-station during handover. Network signalling, management and synchronisation were assumed to be negligible. READ ON:


Guidelines for LTE Backhaul Traffi c Estimation
 

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