Patent ID: 7995462
Filing Date: 2011-08-09
Classification: H04L,H04W

Abstract:
1. A media access control (MAC) module in a wireless receiver, the MAC module being interfaced to a physical layer receiver for receiving data packets and to a physical layer transmitter for sending data packets, wherein the data packets received comprise data packets of multicast message, and wherein the data packets sent comprise negative acknowledgement packets, the MAC module comprising: a detection module detecting errors in each of the data packets received; a multicast buffer for storing the data packets received sorted according to multicast messages; and a negative acknowledgement (NACK) packet preparation module for preparing a NACK packet responsive to a received one of the multicast messages, wherein the wireless receiver is configured to transmit the NACK packet in a selected one of a plurality of NACK times slots, the wireless receiver selecting the NACK time slot according to a specified number of errored packets in the received multicast message.