RELIABLE MULTICAST/BROADCAST FOR P2P COMMUNICATIONS

摘要

Methods and apparatus may be used to pro vide reliable multicast or broadcast for peer-to- peer (P2P) communications. A wireless transmit/receive unit (WTRU) may receive a medium access control (MAC) data frame. The MAC data frame may indicate a flexible acknowledgement (ACK) type (e.g., a subset of peers, a single peer, location based, context based, and/or packet type based). The MAC data frame may indicate an ACK sequence. The ACK sequence may indicate an ACK transmission sequence among peers. The WTRU may determine whether to send an ACK message based on the flexible ACK type and/or the ACK sequence. The WTRU may receive an ACK message from a peer. The WTRU may send the ACK message when it is determined that the ACK message should be sent.