Adjusting electrical downtilt based mechanism of autonomous cell outage compensation

Automatic cell outage compensation is the key technology of self-managed network, which is a functionality aiming to automatically mitigate outages that occur in radio networks due to unexpected failures. However, there are few detailed mechanisms to automatically compensate the coverage hole of the outage cell. In this paper, an adjusting electrical downtilt based mechanism of cell outage compensation in wireless access network is presented. It compensates the coverage hole by automatic adjustment of electrical downtilt in surrounding cells in order to meet the operator´s performance requirements based on coverage and capacity to the largest possible extent. The experiment results show that the proposed mechanism is practicable and efficient. It could effectively and automatically compensate the coverage of cell in outage without pilot pollution, and impair the QoS as little as possible.