Method and apparatus for controlling channel quality reporting modes used by wireless communication network users

摘要

According to this disclosure, a base station or other controlling node within a wireless communication network determines which channel state information reporting mode should be used by individual users among a plurality of active users being supported by the network. In particular, the determination is made as to whether or not an individual user should use frequency-selective reporting and, if so, whether the user should report a frequency-selective channel quality indicator or a frequency-selective precoder matrix indicator.

主权项

1. A method in a wireless communication network node of choosing a reporting mode to be used by an individual user among a plurality of active users competing for resources within a defined system bandwidth used for serving said plurality of active users, said method comprising:
estimating a coherence bandwidth of a transmission channel to or from the user, said coherence bandwidth representing a frequency selectivity of the transmission channel; predicting a transmission bandwidth for the user, based at least in part on a total number of said active users; evaluating said transmission bandwidth with respect to said coherence bandwidth and said system bandwidth, wherein said step of evaluating yields a decision metric whose numeric value indicates whether frequency-selective channel quality reporting or frequency-selective precoder reporting is preferable; and determining whether to configure the user to use frequency-selective channel quality reporting or frequency-selective precoder reporting, or neither, in dependence on said evaluation.