Dynamic load balancing in 3GPP LTE multi-cell networks with heterogenous services

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.

[1]  Raj Jain,et al.  Analysis of the Increase and Decrease Algorithms for Congestion Avoidance in Computer Networks , 1989, Comput. Networks.

[2]  Ramachandran Ramjee,et al.  Generalized Proportional Fair Scheduling in Third Generation Wireless Data Networks , 2006, Proceedings IEEE INFOCOM 2006. 25TH IEEE International Conference on Computer Communications.

[3]  Harish Viswanathan,et al.  Dynamic load balancing through coordinated scheduling in packet data systems , 2003, IEEE INFOCOM 2003. Twenty-second Annual Joint Conference of the IEEE Computer and Communications Societies (IEEE Cat. No.03CH37428).

[4]  Frida Eng,et al.  Streaming applications over HSDPA in mixed service scenarios , 2004, IEEE 60th Vehicular Technology Conference, 2004. VTC2004-Fall. 2004.

[5]  Gustavo de Veciana,et al.  Dynamic association for load balancing and interference avoidance in multi-cell networks , 2007, IEEE Transactions on Wireless Communications.

[6]  Xiaohu You,et al.  Dynamic load balancing and throughput optimization in 3GPP LTE networks , 2010, IWCMC.

[7]  Alexander L. Stolyar,et al.  Scheduling algorithms for a mixture of real-time and non-real-time data in HDR , 2001 .

[8]  Philip A. Whiting,et al.  Convergence of proportional-fair sharing algorithms under general conditions , 2004, IEEE Transactions on Wireless Communications.

[9]  Xiaodong Wang,et al.  Coordinated load balancing, handoff/cell-site selection, and scheduling in multi-cell packet data systems , 2004, MobiCom '04.