Multicast system and multicast method using shortened address and apparatus applied to the same

摘要

Disclosed is a multicast system and a multicast method using a shortened address and an apparatus applied to the same. The multicast system using the shortened address according to the present disclosure has a address configuration for supporting a multicast in an IEEE 802.15.4 MAC (Medium Access Control) layer. Accordingly, when a device processes a multicast through an address configuration of the MAC layer, the device receives the multicast through a simple scheduling such as receiving a beacon signal of a coordinator device only when there is a broadcast of a group including the device. As a result, the device can efficiently perform the multicast in a power managing process or a power processing process.

主权项

1. A coordinator device of a multicast system using a local area network based on a shortened address, the coordinator device comprising:
a storage unit configured to store a group information on a group of a group table, the group formed in the local area network; a local area network communication unit configured to communicate with at least one device included in the local area network; a first address allocator configured to
form a shortened address by classifying a type of address, setting a class, allocating a group ID, and allocating a device ID based on the group information andallocate the shortened address to the at least one device; and a second address allocator configured to form a multicast address based on the shortened address and reallocate the multicast address for multicasting to one or more target groups, wherein the second address allocator is configured to form the multicast address based on the shortened address by
setting the type of address by inputting a bit value of the multicast address in a first bit section of the shortened address,setting the class in a second bit section such that the number of bits, which is allocated to a third bit section and a fourth bit section of the shortened address, varies depending on the setting of the class input in the second bit section of the shortened address,inputting the group ID of a target group for a multicast in each bit of the third bit section of the shortened address, andforming the multicast address by inputting identical bit values in bits of the fourth bit section of the shortened address.