Infrastructure network service measurements are used to determine sector capacity, or the like, in a wireless network. The embodiments use a linear regression to predict current usage and/or capacity of the radio-frequency link resources between wireless subscribers and wireless base stations, for example, as an indication of when the link is incapable of supporting additional subscribers. The determination of resource capacity can be refined down to the sector-carrier level (a single carrier within a base station sector). The prediction can be cast in terms of time, which allows network service providers to plan the growth of their base stations to meet subscriber needs. Metrics derived from the regression, such as line slope, also provide useful information about usage and performance.