画出在AWGN信道下的多用户上行和下行信道容量范围，在保证用户通信公平性的前提下，用Time Sharing和Rate Spliting是上行链路达到香农极限，用Time Sharing和CRX优化使下行链路达到香农极限，并通过仿真图形展现。-Draw in AWGN channel multi-user uplink and downlink channel capacity range, to ensure the user communications fairness premise w