Transmission links
View Patent ↗An apparatus and method is disclosed with a circuit selecting a first number of transmission channels from a plurality of transmission channels for a first number of transmission links, wherein the selection depends on channel capacities of the first number of transmission channels. A second number of transmission channels is selected from the plurality of transmission channels for a second number of transmission links, wherein the selection depends on channel capacities of the second number of transmission channels.
1. A method, comprising:
selecting a first number of transmission channels from a plurality of transmission channels to correspond to a first transmission link by analyzing transmission characteristics of a first number of transmission links by a first selection circuit, wherein the selection depends on channel capacities of the first number of transmission channels;
transmitting a first signal over the selected first number of transmission channels;
selecting a second number of transmission channels from the plurality of transmission channels to correspond to a second transmission link by analyzing transmission characteristics of a second number of transmission links by a second selection circuit, wherein the selection depends on channel capacities of the second number of transmission channels and wherein the second number of transmission links comprises a subset of the first number of transmission links associated with the plurality of transmission channels; and
transmitting a second signal over the selected second number of transmission channels.
2. The method of claim 1 , wherein:
the first number of transmission channels is selected such that a sum of the channel capacities of the first number of transmission channels is maximized, or
the second number of transmission channels is selected such that a sum of the channel capacities of the second number of transmission channels is maximized.
3. The method of claim 1 , wherein the second number of transmission channels is greater than the first number of transmission channels.
4. The method of claim 1 , wherein the second number of transmission links is chosen, based upon transmission link length, to comprise the subset of the first number of transmission links.
5. The method of claim 1 , wherein the second number of transmission links comprises the first number of transmission links except one transmission link, the excluded link comprising the transmission link of the first number of transmission links having the lowest signal-to-noise ratio.
6. The method of claim 1 , wherein the second number of transmission links comprises the first number of transmission links except one transmission link, the excluded link comprising the transmission link of the first number of transmission links having the longest length.
7. The method of claim 1 , wherein the transmission links comprise hard-wired transmission lines.
8. The method of claim 1 , wherein for each of the transmission links a maximum transmit power is pre-determined.
9. The method of claim 1 , wherein the channel capacity of each of the transmission channels depends on signal-to-noise ratios of signals transmitted over the respective transmission channel.
10. The method of claim 1 , wherein transmit power levels of signals transmitted over the transmission links are adjusted such that signals transmitted over the same transmission channel have the same signal-to-noise ratio after transmission.
11. The method of claim 1 , wherein for each of the transmission channels a single signal-to-noise ratio is used to determine the channel capacity of the respective transmission channel.
12. A method, comprising:
selecting a first number of transmission channels from a plurality of transmission channels by a first selection circuit, wherein the selection depends on signal-to-noise ratios of signals transmitted over a first number of transmission links associated with the plurality of transmission channels;
transmitting a first signal over the selected first number of transmission channels;
selecting a second number of transmission channels from the plurality of transmission channels by a second selection circuit, wherein the selection depends on signal-to-noise ratios of signals transmitted over a second number of transmission links associated with the plurality of transmission channels and the second number of transmission links comprises a subset of the first number of transmission links; and
transmitting a second signal over the selected second number of transmission channels.
13. The method of claim 12 , wherein:
for each of the transmission channels a single signal-to-noise ratio is used to select the first number of transmission channels, or
for each of the transmission channels a single signal-to-noise ratio is used to select the second number of transmission channels.
14. The method of claim 12 , wherein transmit power levels of signals transmitted over the transmission links are adjusted such that signals transmitted over the same transmission channel have the same signal-to-noise ratio after transmission.
15. A device, comprising:
a first selection circuit configured to select a first number of transmission channels from a plurality of transmission channels for a first transmission link by analyzing transmission characteristics of a first number of transmission links, wherein the selection depends on channel capacities of the first number of transmission channels; and
a second selection circuit configured to select a second number of transmission channels from the plurality of transmission channels for a second transmission link by analyzing transmission characteristics of a second number of transmission links, wherein the selection depends on channel capacities of the second number of transmission channels and the second number of transmission links comprises a subset of the first number of transmission links.
16. The device of claim 15 , wherein:
the first selection circuit selects the first number of transmission channels such that a sum of the channel capacities of the first number of transmission channels is maximized, or
the second selection circuit selects the second number of transmission channels such that a sum of the channel capacities of the second number of transmission channels is maximized.
17. The device of claim 15 , wherein the second number of transmission links comprises the first number of transmission links except one transmission link, the excluded link comprising the transmission link of the first number of transmission links having the lowest signal-to-noise ratio.
18. The device of claim 15 , wherein the second number of transmission links comprises the first number of transmission links except one transmission link, the excluded link comprising the transmission link of the first number of transmission links having the longest length.
19. The device of claim 15 , wherein the channel capacity of each of the transmission channels depends on signal-to-noise ratios of signals transmitted over the respective transmission channel.
20. The device of claim 15 , further comprising an adjustment circuit configured to adjust transmit power levels of signals transmitted over the transmission links such that signals transmitted over the same transmission channel have the same signal-to-noise ratio after transmission.
21. The device of claim 15 , wherein for each of the transmission channels a single signal-to-noise ratio is used to determine the channel capacity of the respective transmission channel.
22. The device of claim 15 , wherein the second number of transmission links is chosen, based upon transmission link length, to comprise the subset of the first number of transmission links.
23. A device, comprising:
a first selection circuit configured to select a first number of transmission channels from a plurality of transmission channels, wherein the selection depends on signal-to-noise ratios of signals transmitted over a first number of transmission links associated with the plurality of transmission channels; and
a second selection circuit configured to select a second number of transmission channels from the plurality of transmission channels, wherein the selection depends on signal-to-noise ratios of signals transmitted over a second number of transmission links associated with the plurality of transmission channels and the second number of transmission links comprises a subset of the first number of transmission links.
24. The device of claim 23 , wherein:
for each of the transmission channels a single signal-to-noise ratio is used to select the first number of transmission channels, or
for each of the transmission channels a single signal-to-noise ratio is used to select the second number of transmission channels.
25. The device of claim 23 , further comprising an adjustment circuit configured to adjust transmit power levels of signals transmitted over the transmission links such that signals transmitted over the same transmission channel have the same signal-to-noise ratio after transmission.
26. A method for increasing bit rate of longer transmission links, while reducing bit rate of shorter transmission links, comprising:
selectively choosing a number of transmission frequency channels, based upon channel capacities, for one or more transmission links, wherein the number of transmission frequency channels are chosen to allow for a transmission link transmit power that is proportional to a length of the one or more transmission links to increase transmission bit rates for longer transmission links while reducing transmission bit rates for shorter transmission links; and
transmitting a signal over the chosen number of transmission frequency channels.