Abstract
To suppress concentration of channel quality information requests and reports in a case of discontinuously transmitting reference signals at specific resources in a time domain and thereby preventing degradation in throughput. A transmission apparatus (eNB) transmits an instruction of CSI request distributed for each reception apparatus in a subframe concurrently with or earlier than a reference signal CSI-RS to each of reception apparatuses (UE 1 UE2). Each of the reception apparatuses (UE1 UE2) detects the CSI request from the transmission apparatus and calculates CSI from a channel estimation value of CSI-RS received thereafter. Then the reception apparatus identifies CSI report subframe of the own apparatus from CSI report interval information of a given time interval notified in advance the subframe in which the CSI request is detected and transmission timing of CSI-RS and transmits a feedback signal including CSI report value by using PUSCH at the timing of the CSI report subframe.
Technology
Resource configuration
Product
Use Cases
Wireless communication
Services
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