Priority rules of periodic CSI reporting in carrier aggregation

摘要

A method of determining priority rules for periodic CSI reporting in carrier aggregation is proposed. A UE obtains channel state information (CSI) feedback for multiple downlink component carriers (CCs) in a multi-carrier wireless communication network. Each downlink CC is associated with a feedback mode, and each feedback mode comprises a set of feedback types to be reported to a base station at time slots configured by an upper layer. The UE then determines a prioritized downlink CC for CSI reporting based on priority levels of the feedback types to be transmitted for each downlink CC at a given time slot. The UE then transmits the corresponding CSI feedback for the prioritized downlink CC at the given time slot via a feedback channel over a primary uplink CC. In one embodiment, different feedback types are prioritized by groups, and each group has several feedback types sharing the same priority.

主权项

1. A method comprising:
obtaining channel state information (CSI) feedback for multiple downlink component carriers (CCs) by a user equipment (UE) in a multi-carrier wireless communication network, wherein each downlink CC is associated with a feedback mode, and wherein each feedback mode comprises a set of feedback types to be reported to a base station; determining a prioritized downlink CC for CSI reporting based on feedback types and feedback modes to be transmitted for each downlink CC, wherein different feedback types are organized into feedback type groups based on CSI information types, wherein multiple feedback types within the same feedback type group share the same priority level, wherein different feedback modes are organized into feedback mode groups based on transmission modes, and wherein multiple feedback modes within the same feedback mode group share the same priority level; and transmitting corresponding CSI feedback for the prioritized downlink CC over a primary uplink CC.