METHOD 0F 3RD PARTY CONTROL FOR IP MULTICAST GROUP MEMBERSHIP IN 2-WAY RADIO SYSTEMS
Original Publication Date: 1999-Jun-01
Included in the Prior Art Database: 2002-Aug-19
IP Multicast is a packet based technology for transmitting information from a single source to multiple destinations. IP multicast is being pursued as the voice transport protocol for next generation RNSG (two-way radio) infrastructures. IP Multicast is a receiver oriented protocol. To receive IP Multicast packets, as described in RFC1112, hosts (i.e. base/repeaters) configure their LAN hardware and software stack to receive IP Multicast packets. In addition, hosts generate and transmit IGMP (Internet Group Management Protocol) join mes- sages on their LAN to inform neighboring routers which IP Multicast groups they wish to join. The routers then construct IP multicast distribution trees by sharing group membership information using an IP Multicast routing protocol.