METHOD AND APPARATUS FOR REPORTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM

摘要

Sub-band CQI reports are introduced for LTE systems having system bandwidth of narrow band, e.g. less than or equal to 6 resource blocks, which address issues pertinent to such narrowband systems. Three related methods are described: fixed, semi-static and adaptive sub-band size. To varying degrees they are each specified in accordance with the channel condition.

主权项

1. A method for reporting channel state information corresponding to a communication link between a terminal device and a base station in a wireless communications system, the wireless communication system having a system bandwidth divided into a plurality of sub-band parts having at least one characteristic sub-band size, the method comprising:
providing a plurality of communications resource elements across the system bandwidth; measuring one or more channel state parameter corresponding to the channel state in one or more of the communications resource elements; generating aggregate channel state information from at least one measured channel state parameter corresponding to the channel state of the communications resource elements, generating sub-band channel state information from at least one measured channel state parameter corresponding to the channel state of the communications resource elements within respective sub-band parts, wherein the size of the sub-band part is dependent upon radio propagation conditions.