Dynamic Load Balancing in 3GPP LTE Multi-Cell Networks with Heterogenous Service

cooper19

Load balancing among multi-cells in 3GPP Long
Term Evolution (LTE) networks with heterogeneous services is
investigated. It is formulated as a multi-objective optimization
problem, the objectives of which are load balancing index of
services with QoS requirements and network utility of other
services. The constraints are physical resource limits and QoS
demands. Then the property and complexity of the problem
are analyzed, and sequential optimization method is employed
to solve it. After that, a practical algorithm for load balancing
is developed which includes QoS-guaranteed hybrid scheduling,
handover of users with and without QoS requirements, and call
admission control. Simulation is made extensively and the results
show that the proposed load balancing algorithm can significantly
enhance the performance of LTE networks with heterogeneous
services, decreasing call block probability of users with QoS
requirements, and increasing throughput of boundary users with
only a bit degradation of total throughput.
Index Terms—3GPP LTE, dynamic load balancing, Quality of
Service (QoS)