Access Node Comprising VOIP Cards with Common IP/MAC Address
First Claim
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1. An access node configured to handle downstream RTP packets associated with an ongoing VoIP call, the access node comprising:
- a controller card connectable to an IP network; and
a first and at least one additional VoIP card connectable to the controller card, wherein the first VoIP card is the destination of the RTP packets and is configured with at least one UDP port number, the VoIP cards are assigned a common IP address and a common MAC address for the RTP packets;
means for receiving an RTP packet from the IP network, the RTP packet comprising the common IP address as a destination IP address, the common MAC address as a destination MAC address and a destination UDP port number; and
means for identifying a destination VoIP card based only on the destination UDP port number.
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Abstract
Disclosed are methods and arrangements in a VoIP access node for handling downstream and upstream RTP packets associated with an ongoing VoIP call. One common IP address can be assigned to the all of the RTP traffic of an access node instead of assigning one IP address per VoIP card, This may be done by identifying the destination VoIP card based on the destination UDP port number in a received RTP packet. The number of public IP addresses needed for VoIP service may be reduced without increasing the cost of the access node.
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Citations
24 Claims
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1. An access node configured to handle downstream RTP packets associated with an ongoing VoIP call, the access node comprising:
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a controller card connectable to an IP network; and a first and at least one additional VoIP card connectable to the controller card, wherein the first VoIP card is the destination of the RTP packets and is configured with at least one UDP port number, the VoIP cards are assigned a common IP address and a common MAC address for the RTP packets; means for receiving an RTP packet from the IP network, the RTP packet comprising the common IP address as a destination IP address, the common MAC address as a destination MAC address and a destination UDP port number; and means for identifying a destination VoIP card based only on the destination UDP port number. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method in an access node for handling downstream RTP packets associated with an ongoing VoIP call, the access node comprising a controller card connected to an IP network, and a first and at least one additional VoIP card connected to the controller card, wherein the first VoIP card is a destination of the RTP packets, and is configured with at least one UDP port number, the method comprising:
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assigning a common IP address and a common MAC address for the RTP packets to the VoIP cards; receiving an RTP packet from the IP network, the RTP packet comprising the common IP address as a destination IP address, the common MAC address as a destination MAC address and a destination UDP port number; and identifying a destination VoIP card based only on the destination UDP port number. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method in an access node for handling upstream RTP packets associated with an ongoing VoIP call, the access node comprising a controller card connected to an IP network, and a first and at least one additional VoIP card connected to the controller card, the first VoIP card being the origin of the RTP packets, and wherein the VoIP cards have been assigned a common IP address and a common MAC address for the RTP packets, the method comprising the following performed by the first VoIP card:
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generating an RTP packet comprising the common IP address as a source IP address and the common MAC address as a source MAC address; and forwarding the generated RTP packet to the IP network. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification