[求助]帮忙选个好的研究课题

wrenwang

做PHD 不知道选哪一个。高手指点一下
1Evolution of Internet-friendly radio/satellite link layer protocols to support the IP traffic of next generation networks.
2investigating TCP performance (and application layer performance!!) over satellite and/or bandwidth-on-demand (BoD) links
3packet protocols over satellite
4 IP multicast
具体分析原因。谢了。很迷茫。。。