Chung Ang University Industry Academic Cooperation

Jun Beom Hur

Ju Ho Lee

Tae Jin Kim

Sung Rae Cho

Jeong Seok Yu

Yun Seong Lee

Woong Soo Na

Zeynep Vatandas

Hyoung Chel Bae

Hyoung Chul Bae

A wireless device and method for managing a multicast group within a wireless network are disclosed. The wireless device is included in a first multicast group in which data is directly sent between member devices or data is sent using hopping between the member devices. The wireless device includes a reception unit, a determination unit, and a transmission unit. The reception unit receives a join request for joining a second multicast group from a joining device that attempts to join the second multicast group. The determination unit extracts information about the second multicast group from the join request, and determines whether the second multicast group is identical with the first multicast group based on the information about the second multicast group. The transmission unit forwards the join request to another device or sends a response to the join request to the joining device based on a result of the determination.

Device and method for managing multicast group in wireless network

The present invention discloses a method for providing reliable multicasting service in wireless network. The disclosed method groups a plurality of receiving nodes into a plurality of receiving groups, and decides the ACK transmission time point against each receiving group, which is not overlapped with other receiving groups. The receiving node contained in each receiving group transmits ACK against the received data frame at the ACK transmission time point, which is decided according to the corresponding receiving group.

Apparatus and method for receiving ACK in wireless network

Growing community of inventors

Yongin-si, South Korea

Jun Beom Hur