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Machine translation
1. (WO2007092669) METHOD AND APPARATUS TO FACILITATE MULTICAST TRANSMISSIONS USING A SHARED INFRASTRUCTURE-SUPPLIED SOURCE ADDRESS
Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

CE13617N

We claim:

1. A method comprising, subsequent to facilitating for a first end user a transmission of at least one data packet for a first multicast transmission using an infrastructure-supplied source address:
using the infrastructure-supplied source address to facilitate transmission of at least one data packet for a second end user for a second multicast transmission.

2. The method of claim 1 wherein using the infrastructure-supplied source address to facilitate transmission of at least one data packet for a second end user for a second multicast transmission comprises using the infrastructure-supplied source address to facilitate transmission of at least one data packet for a second end user for a second multicast transmission to a same multicast destination address as was used for the first multicast transmission using a same Protocol Independent Multicast-Sparse Mode (PIM-SM) distribution tree to facilitate the transmission for the second end user as was used to facilitate the transmission for the first end user.

3. The method of claim 1 wherein the infrastructure-supplied source address comprises, at least in part, an Internet Protocol source address that comprises, at least in part, a subnet source address.

4. The method of claim 1 wherein using the infrastructure-supplied source address to facilitate transmission of at least one data packet for a second end user for a second multicast transmission further comprises not updating routing-related state
information when using the infrastructure-supplied source address to facilitate transmission of at least one data packet for a second end user.

5. The method of claim 1 further comprising:
associating the infrastructure-supplied source address with a plurality of subnets.

CE13617N

6. The method of claim 1 wherein using the infrastructure-supplied source address to facilitate transmission of at least one data packet for a second end user for a second multicast transmission further comprises:
substituting the infrastructure-supplied source address for a source address as has been initially provided by the second end user.

7. The method of claim 1 further comprising:
using a Foreign Agent (FA) to provide the infrastructure-supplied source address.

8. An apparatus comprising:
a memory having stored therein an infrastructure-supplied source address that is common to a plurality of end users;
a data packet-based multicast communication transmission facilitator operably coupled to the memory and being arranged and configured to use the infrastructure-supplied source address as a source address for corresponding uplink multicast data packets.

9. The apparatus of claim 8 wherein the apparatus comprises, at least in part, an end user platform.

10. The apparatus of claim 8 wherein the apparatus comprises, at least in part, an infrastructure platform.