SPECIFIC VELOCITY ESTIMATION OF WIRELESS NETWORK DEVICES

摘要

Techniques are disclosed for determining a specific velocity of a device attached to a wireless network. The specific velocity can be determined using a handover count of the base station boundary transitions over a time window and/or using a set of sojourn time samples that each denote the duration the device remains in the zone of a particular base station. Techniques operate effectively in cellular networks having high base station densities. The specific velocity estimates may be inputs to components on the device or network to adjust a local device function or performance behavior.

主权项

1. A method of determining the velocity of a device in a wireless network, the method comprising:
receiving a handover count (H) of base station boundary transitions made by the device over a predefined time window (T); determining a specific velocity estimate for the device using H, T, and a base station density (λ) as inputs to a velocity estimator; and returning the specific velocity estimate, wherein the velocity estimator achieves a Cramer-Rao Lower Bound (CRLB) for velocity estimation, and wherein the CRLB is derived from an approximation of a probability mass function (PMF) of the handover count.