The degree and delay constrained routing problem in overlay multicast is studied, and a new overlay multicast routing protocol called degree and delay constrained tree protocol (DDCTP) is proposed.

• 摘要研究了有度和延时约束的覆盖多播路由问题，提出了一个新的覆盖多播路由协议-度、延时约束树协议(DDCTP)。