Mobility measurement using CSI-RS in additional carrier

摘要

A system and a method for a mobility measurement in a wireless network comprises determining at a wireless terminal a channel power estimation ES for a carrier signal based on Channel State Information Reference Signals (CSI-RS), and determining at the wireless terminal a noise plus interference I+N for the carrier signal based on a muted CSI-RS. The carrier signal is an additional carrier without the presence of a Cell-specific Reference Signal. In one exemplary embodiment, the periodicity of the CSI-RS is selected to be 1, 2 or 3 subframes.

主权项

1. A wireless terminal, comprising:
a receiver coupled to one or more antennas; and a processor coupled to the receiver, the processor being configured to:
determine a channel power estimation Es for a carrier signal based on Channel State Information Reference Signals (CSI-RS) received by the receiver, the carrier signal being an additional carrier without the presence of a Cell-specific Reference Signal transmitted in a wireless network by a node providing wireless access to the wireless network, wherein the channel power estimation is determined by averaging a channel power from the one or more antennas, by using random precoding, or by using a subset of CSI-RS ports, or combinations thereof,determine a noise plus interference I+N for the carrier signal based on a muted CSI-RS, andcalculate a Reference Signal Received Power (RSRP) measurement or a Reference Signal Received Quality (RSRQ) measurement, or a combination thereof, based at least in part on the channel power estimation and the noise plus interference.