| US 7,590,064 B1 | ||
| Method and system of flow control in multi-hop wireless access networks | ||
| Hang Zhang, Nepean (Canada); and Shalini Periyalwar, Nepean (Canada) | ||
| Assigned to Nortel Networks Limited, St. Laurent, Quebec (Canada) | ||
| Filed on Jul. 20, 2004, as Appl. No. 10/894,037. | ||
| Int. Cl. G01R 31/08 (2006.01); H04B 7/14 (2006.01) | ||
| U.S. Cl. 370—235 [370/236; 370/315] | 13 Claims |
| 1. A relay transceiver comprising:
a receiver adapted to receive packets on a first wireless link collectively destined for at least one mobile terminal;
a transmitter adapted to transmit the packets on a second wireless link;
a buffer adapted to buffer the packets between their receipt and transmission; and
a flow control function adapted to:
participate in flow control over the first wireless link to limit an amount buffered in the relay transceiver for a given
mobile terminal; and
transmit a message when a number of packets reaches a threshold selected to substantially guarantee the buffer will be emptied
within a predetermined time, wherein the threshold is based on α R Tc, where Tc is the predetermined time, R is a minimum
data rate on the second wireless link, and α is an average availability of the second wireless link for transmitting to the
given mobile terminal.
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