同意3楼的思路。往往PDCCH capacity会成为最先出现的短板;而且上行PUCCH的传统的2~3个RB的资源分配方式也会在cell load较高时显现不足。如果只考虑用户面,那么推荐参考R1-071354 "Max #UEs/Subframe for Optimum E-UTRA DL Performance (5-20MHz)",里面提到:
"Conclusion: For FB and HTTP traffic, close to optimum spectral efficiency and 5%-ile user t-put are achieved when the maximum UEs scheduled per SF is 6 for 5MHz, 10 for 10MHz, and 18 for 20MHz correspondingly. It is proposed that this conclusion summarized in Table 2 be used when determining the DL L1/L2 control channel design."
最后要说明一下,这个不一定就代表任何厂家的实现。