Node distribution in a multi channel MoCA network
MoCA network management device and a method for channel allocation to nodes over a coaxial cable in a MoCA network, comprising the steps of detecting a connection attempt from a first node on one channel out of a list of channels; and selectively allowing connection to said channel based on a likelihood parameter (R) which is dependent on which channel in the list of channels the connection attempt is made on. The list of channels may be a scan sequence of channels, wherein the likelihood parameter is dependent on position in of the channel in that scan sequence. If a node is denied access, it may switch to a next channel in the scan sequence.
1. A method for channel allocation to nodes over a coaxial cable in a data communication network, comprising the steps of:
detecting a connection attempt from a first node on one available channel out of a list of channels, wherein the list of channels is a scan sequence of channels; and
selectively allowing connection of the first node to said one channel based on a likelihood parameter, which is dependent on position of said one channel in said scan sequence, wherein a likelihood for allowing connection is increasingly higher from a first to a last position in the scan sequence.
2. The method of claim 1 , wherein the likelihood parameter is an accept ratio R, and wherein the step of selectively allowing connection comprises evaluating a relation of a random number N with respect to the accept ratio R.
3. The method of claim 2 , further comprising the steps of:
denying connection of the first node to the channel; and
subsequently detecting a second connection attempt from the first node on a different channel from said list of channels.
4. The method of claim 2 , wherein the step of evaluating comprises determining the random number N, which is between 1 and 1/R, and allowing connection if N=1.
5. The method of claim 4 , further comprising the steps of:
denying connection of the first node to the channel; and
subsequently detecting a second connection attempt from the first node on a different channel from said list of channels.
6. The method of claim 2 , wherein said list of channels is a scan sequence of 1−n channel frequencies, where n is a number of channel frequencies, wherein a first frequency has a lowest likelihood for allowing connection and a last frequency has a highest likelihood for allowing connection.
7. The method of claim 6 , wherein the accept ratio R is 1/n for a first channel frequency and wherein the accept ratio R is 1 for a last channel frequency.
8. The method of claim 6 , wherein the accept ratio is R=1/(1+(n−s)), where s is a position of said channel frequency in the scan sequence of channel frequencies.
9. The method of claim 1 , further comprising the steps of:
denying connection of the first node to the channel; and
subsequently detecting a second connection attempt from the first node on a different channel from said list of channels.
10. The method of claim 9 , wherein the likelihood parameter is an accept ratio R, and wherein the step of selectively allowing connection comprises evaluating a relation of a random number N with respect to the accept ratio R.
11. The method of claim 9 , wherein said different channel is a next channel in a scan sequence of the list of channels, which next channel is associated with a likelihood parameter that is based on which connection is allowed with higher likelihood than said one channel.
12. A network management device for controlling connection to a node over a coaxial cable in a data communication network, comprising:
a data network connector connected to an external data network;
a coax connector;
a network controller; and
non-transitory computer readable memory comprising computer code which is executable by the network controller to:
detect a connection attempt from a first node on one channel from a list of channels, wherein the list of channels is a scan sequence of channels, and
selectively allow connection of the first node to said channel based on a likelihood parameter, which is dependent on position of said one channel in said scan sequence, wherein a likelihood for allowing connection is increasingly higher from a first to a last position in the scan sequence.
13. The network management device of claim 12 , further comprising a plurality of network controllers, each network controller comprising non-transitory computer readable memory comprising computer code which is executable by the network controller to selectively allow or deny connection to a different channel within the list of channels based on a likelihood parameter dependent on the respective channel.
14. The network management device of claim 12 , wherein the non-transitory computer readable memory comprises computer code that is executable by the network controller to evaluate a relation of a random number N with respect to the accept ratio R.
15. A data communication node configured to connect to a management device for controlling connection to a node over a coaxial cable in a data communication network, comprising:
a coax connector;
a signal transceiver;
a control unit; and
non-transitory computer readable memory comprising computer code which is executable by the control unit to control the signal transceiver to:
transmit a connection attempt of the node on one channel out of a list of channels, and
transmit a second connection attempt on a different channel out of the list of channels, wherein in the list of channels a likelihood of allowing connection is increasingly higher from a first to a last position in the scan sequence.
16. The data communication node of claim 15 , wherein the control unit is configured to control the signal transceiver to swap to a higher frequency channel in a scan sequence of said list of channels.