Scrutinizing Real-life Configurations of Random Access Procedures in Cellular Networks
This addresses performance inefficiencies in cellular networks for operators and users, offering a simple adaptation to reduce delays, though it is incremental as it builds on existing optimization methods.
The study analyzed real-world configurations of random access procedures in cellular networks, finding that current setups often mismatch deployment scenarios and increase collision risks, leading to delays. Through simulation, they demonstrated that optimizing these configurations could reduce collisions by up to 61% and lower connection delays by up to 42%.
In cellular networks, base stations broadcast configurations that devices use for the random access procedure, which is a vital part of the connection setup. Ideally, the network should choose configurations based on the deployment scenario to optimize radio resource management. Doing so can, for example, decrease collisions of random access messages. We captured 112,806 data points of cellular broadcast information from nine network operators across three countries and analyzed how the operators configure the random access procedure. We found that configurations often do not fit the deployment scenario, and neighboring cells often use the same configuration, causing an unnecessarily high risk of collisions and, hence, delay in the connection setup. Furthermore, we simulated the random access procedure in NS-3 and found that by varying the configurations in a large area with many cells, the number of collisions can be reduced by 43% on average and up to 61%, and the connection delay can be lowered by 11% on average and up to 42%. Our findings indicate that simple adaptations in the random access configurations can greatly improve the performance of cellular networks.