Unicast to multicast conversion

• US 8,619,662 B2
• Filed: 11/02/2010
• Issued: 12/31/2013
• Est. Priority Date: 11/05/2004
• Status: Active Grant

• Current Assignee: ARRIS Enterprises LLC (CommScope Holding Company, Inc.)
• Original Assignee: Ruckus Wireless, Inc. (CommScope Holding Company, Inc.)
• Inventors: Kish, William, Gram, Charles Andrew
• Primary Examiner(s): Ly, Nghi H
• Application Number:
  US12/938,316
• Publication Number:
  US 20110096712A1
• Time in Patent Office: 1,155 Days
• Field of Search: 370/312, 370/349, 370/328, 370/338, 455/414.1, 455/456.3
• US Class Current: 370/312
• CPC Class Codes: H04L 45/16 Multipoint routing
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

Abstract

A method for unicast packet conversion whereby a unicast packet is received at a receiving node followed by a determination as to whether the destination address is identified in the packet. If the address is identified, then the unicast packets are converted to a multicast packet and forwarded to a connected station. If a destination network address is not identified, then the packet is forwarded to the connected station.

Claims

1. A packet-based transmission method, the method comprising:

receiving a unicast packet at a network interface communicatively coupled to a receiving node;

executing instructions stored in memory of the receiving node to determine that a destination address is identified in the packet;

converting the unicast packet to a multicast packet in accordance with a map of media access control (MAC) addresses accessible to the receiving node and corresponding to one or more connected stations in a wireless network; and

forwarding the converted packet to a connected station based on the MAC conversion map and using an 802.1x protocol.

2. The method of claim 1, wherein the connected station is in a wireless network, and the wireless network utilizes an 802.11 protocol.

3. The method of claim 1, further comprising:

determining a minimum data rate for forwarding the converted packet to the connected station;

determining an effective converted packet rate for forwarding the converted packet to the connected station; and

not forwarding the converted packet to the station and instead forwarding the unicast packet to the station when the effective converted packet rate does not exceed the minimum data rate.

4. The method of claim 1, further comprising:

determining an antenna configuration on which to transmit to the connected station;

determining a physical data rate at which to transmit to the connected station;

transmitting the converted packet on the antenna configuration and at the physical data rate over the wireless network from the receiving node to the connected station.

5. The method of claim 1, further comprising:

transmitting a join request from the connected station a source of the unicast packet; and

associating the connected station to an address of the unicast packet based on the join request.

6. A non-transitory computer readable storage medium having embodied thereon a program, the program being executable by a processor to perform a packet-based transmission method, the method comprising:

receiving a unicast packet;

determining that a destination address is identified in the packet;

converting the unicast packet to a multicast packet in accordance with a map of media access control (MAC) addresses corresponding to one or more connected stations in a wireless network; and

forwarding the converted packet to a connected station based on the MAC conversion map and using an 802.1x protocol.

7. The non-transitory computer readable storage medium of claim 6, wherein the connected station is in a wireless network, and the wireless network utilizes an 802.11 protocol.

8. The non-transitory computer readable storage medium of claim 6, further comprising:

determining a minimum data rate for forwarding the converted packet to the connected station;

determining an effective converted packet rate for forwarding the converted packet to the connected station; and

not forwarding the converted packet to the station and instead forwarding the unicast packet to the station when the effective converted packet rate does not exceed the minimum data rate.

9. The non-transitory computer readable storage medium of claim 6, further comprising:

determining an antenna configuration on which to transmit to the connected station;

determining a physical data rate at which to transmit to the connected station;

transmitting the converted packet on the antenna configuration and at the physical data rate over the wireless network to the connected station.

10. The non-transitory computer readable storage medium of claim 6, further comprising:

transmitting a join request from the connected station a source of the unicast packet;

associating the connected station to an address of the unicast packet based on the join request.