As Nancy et al. conducted an in-depth evaluation of different distance metrics and proposed the most appropriate combination of metrics for different situations. Generally, the Euclidean Metric is a good choice.
wireless propagation is always linear, so the Euclidean Metric will be the best option.
Reference List
- Amato, N. M., Bayazit, O. B., Dale, L. K., Jones, C., & Vallejo, D. (1998, May). Choosing good distance metrics and local planners for probabilistic roadmap methods. In Proceedings. 1998 IEEE International Conference on Robotics and Automation (Cat. No. 98CH36146) (Vol. 1, pp. 630-637). IEEE.