Hi, I am a user of ns-2.1b8. My major interest is in MAC layer. I have seen that there is a mac_multihop.h and cc file in ns, but I can not use this file, can you explain why. Thanks. Sincerely yours, Li ================================================== ������������ ���羫������ http://player.163.com �������������������� http://www.166.com ͬ�������� �����˵��������� http://dating.163.com