| 摘要 |
Multicast data in a wireless network is encoded with FEC codes where K information symbols are encoded into N transmission symbols, N>K, where K-N represents redundancy, such that reception and decoding of any K+A transmission symbols is sufficient to recover the K information symbols, where A is small relative to K. The level of redundancy may be selected to provide adequate performance to a mobile terminal at the edge of a cell, or to the mobile terminal reporting the lowest quality link. Upon handoff, a mobile terminal may be directed to an ongoing multicast in the new cell of the same information, or alternatively the new cell may transmit only the multicast packets the mobile terminal has not received. Different time segments of the information may be separately encoded, or the same information encoded with different level of redundancy, and the encoded data transmitted on different wireless channels.
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