CELL DEPENDENT MULTI-GROUP HYBRID AUTOMATIC REPEAT METHOD FOR MULTICAST IN WIRELESS NETWORKS

摘要

A method and apparatus are described including determining address using an access point address and a multicast group address, transmitting a recovery request message to a recovery server to request recovery data using the address and receiving the recovery data from the recovery server. Also described are a method and apparatus including receiving a registration message, transmitting a reply to the registration message, receiving a recovery request message, transmitting recovery data responsive to the recovery request message and transmitting a message to a recovery multicast group to determine status of the recovery multicast group.

主权项

1. An apparatus for automatic repeat request error recovery, comprising:
a control module, determining a recovery multicast group address using a function of a multicast group address and access point address; said control module in communication with a communications interface, transmitting a request to join a multicast group; said control module in communication with said communications interface, transmitting a request to join a recovery multicast group; said control module in communication with said communications interface, transmitting a registration message to a recovery server; said control module in communication with said communications interface, determining when a registration reply message has been received from said recovery server; an automatic repeat request module in communication with said communications interface, transmitting a recovery request message to a recovery server to request recovery data using said determined recovery multicast group address; and a data receiving module in communication with said communications interface, receiving said recovery data from said recovery server, wherein said recovery data is one of error recovery data generated by cross packet coding and re-transmitted data.