Impact of Feedback Channel Delay over Joint User Scheduling Scheme and Separated Random User Scheduling Scheme in LTE-A System with Carrier Aggregation

Table 1

Delays in LTE-A that input to the gross feedback delay.

Duration (ms)	Delay type	Node and cause of delay
1	Process	User: downlink channel estimation encode
1	Transmit	User: uplink data and channel state information
1	Transmit	BS: downlink data and pilots
	Wait	Uplink subframe
≥1	Process	BS: resource allocation, encode
1	Process	BS: uplink channel estimation, decode
	Wait	Downlink subframe