| US 7,577,407 B2 | ||
| System and apparatus for performing broadcast and localcast communications | ||
| Lawrence J. Karr, Santa Monica, Calif. (US); and William H. Mitchell, Redmond, Wash. (US) | ||
| Assigned to Microsoft Corporation, Redmond, Wash. (US) | ||
| Filed on Nov. 13, 2003, as Appl. No. 10/714,092. | ||
| Application 10/714092 is a division of application No. 10/044294, filed on Oct. 26, 2001. | ||
| Claims priority of provisional application 60/302831, filed on Jul. 03, 2001. | ||
| Prior Publication US 2004/0242163 A1, Dec. 02, 2004 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H04B 1/66 (2006.01); H04M 1/00 (2006.01) | ||
| U.S. Cl. 455—102 [455/561; 455/552.1; 455/108; 455/110] | 20 Claims |
| 1. A method of re-transmitting data transmitted over an FM subcarrier, comprising the steps of:
receiving at a localcast transmitter the transmitted data;
locally formatting the transmitted data for local-area wireless transmission; wherein locally formatting the transmitted data
includes encoding the transmitted data at a data encoder when retransmitting using a first transmission speed and bypassing
the data encoder when retransmitting using a second transmission speed;
interleaving the locally formatted data that includes data encoded at the data encoder when retransmitting using the first
transmission speed and data encoded through bypassing the data encoder when retransmitting using the second transmission speed;
wherein interleaving includes interleaving a first portion of the locally formatted data and a second portion of the locally
formatted data over a broadcast frame that includes sub frames; wherein the first portion is for transmission at a first latency
and the second portion is for transmission at a second latency, the second latency being lower than the first latency; and
wherein each sub frame includes data associated with the first portion and data associated with the second portion that are
interleaved together; and
retransmitting the interleaved locally formatted data from a localcast transmitter to a local area.
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