Mobile Station Mediator for Cellular Load Balancing
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Solution Overview
Problem
In cellular networks, the uncoordinated deployment of femtocells and the use of Closed Subscriber Groups (CSGs) complicate load balancing, as macrocell base stations often lack backhaul connections with femtocells, making it difficult to exchange load information and manage resource usage effectively.
Innovation Solution
A method where a mobile station receives load information from a femtocell base station and communicates it to a macro base station, allowing for load balancing without relying on backhaul channels, and enabling the macro base station to initiate discovery and handover processes to alleviate congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If load information is exchanged between base stations through backhaul channels, then load balancing can be implemented, but this approach fails when backhaul connections do not exist between macrocell base stations and femtocells
Solution Approach 1:
The mobile station acts as an intermediary to transfer load information from the femtocell base station to the macro base station. Instead of requiring a direct backhaul connection between base stations, the mobile station receives load information from the target base station and forwards it to the serving base station, enabling load balancing without direct backhaul connectivity.
Solution Approach 2:
The patent replaces the traditional mechanical backhaul connection system with an over-the-air signaling system. Load information that would traditionally be exchanged through wired backhaul interfaces (X2 or S1) is instead transmitted wirelessly through the mobile station, eliminating the requirement for physical backhaul infrastructure between disparate base stations.
2Adaptability or versatility
If femtocells are deployed in an uncoordinated manner with CSG restrictions, then network flexibility and user privacy are improved, but load balancing becomes difficult due to restricted access and lack of backhaul connections
Solution Approach 1:
The mobile station serves as a mediator that can access load information from CSG-restricted femtocells and convey it to macro base stations. This intermediary approach allows load balancing information to be shared without requiring the femtocell to open its access restrictions or establish backhaul connections, preserving both security and operational capability.
Solution Approach 2:
The mobile station autonomously performs the function of load information exchange without requiring coordination between base stations. The mobile station independently receives load information from the target base station, processes it, and provides it to the serving base station, enabling load balancing procedures to self-organize around the mobile station rather than requiring complex inter-base-station coordination.
Data Source
AI summary
A method and system are disclosed for operation of a cellular network comprising a first base station, a second base station and a mobile station being served by the first base station. Load information is received from the second base station at the mobile station, the load information indicating a load placed on the resources of the second base station and a load indication based on the received load information is communicated from the mobile station to the first base station. The first base station may be a macrocell base station and the second base station may be a non-planned or femtocell base station.