Method and a controlling node for controlling resources in a shared channel
A method in a controlling node for controlling resources in a shared channel is provided. The method comprises: receiving from a network node, a request for resources in the shared channel; in response to the request, determining a utility function representing a performance metric for the network node based on transmissions from other network nodes using the shared channel; and in response to determining that the utility function satisfies a threshold, granting the resources in the shared channel to the network node. A controlling node is also provided for performing this method. The controlling node can be a Spectrum Access System (SAS), for example.
1. A method in a controlling node for controlling resources in a shared channel, the method comprising:
receiving from a network node, a request for resources in the shared channel;
in response to the request, determining a utility function representing a performance metric for the network node based on transmissions from other network nodes using the shared channel; and
in response to determining that the utility function satisfies a threshold, granting the resources in the shared channel to the network node;
wherein the utility function comprises an interference function that measures an impact of an interference level due to transmissions of the network node requesting the resources to the other network nodes, in the shared channel, and wherein the interference level is determined through a user value function and an evaluation grid.
2. The method of claim 1 , wherein the interference function comprises one of Signal-to-Interference-plus Noise Ratio (SINR) and Signal Leakage-to-Noise Ratio (SLNR).
3. The method of claim 1 , wherein the user value function reflects a service value that a user will receive from the network node.
4. The method of claim 1 , wherein the user value function is dependent on a signal received from the network node and interferences generated by the other network nodes.
5. The method of claim 1 , further comprising calculating a relative user value, in a coverage area of the network node, wherein the relative user value is a difference of the user value before the network node is granted the resources in the shared channel and after the network node is granted the resources in the shared channel.
6. The method of claim 5 , further comprising determining an average relative user value, in which the determined relative user value is averaged over the coverage area of the network node.
7. The method of claim 6 , further comprising determining a total average relative user value, in which the determined total average relative user value is averaged over all the other network nodes using the shared channel.
8. The method of claim 7 , wherein determining that the utility function satisfies a threshold comprises determining that the total average relative user value is equal or superior to the threshold.
9. A controlling node for controlling resources in a shared channel, the controlling node comprising a processor and a memory, the memory containing instructions executable by the processor, whereby the network node is operative to:
receive from a network node, a request for resources in the shared channel;
in response to the request, determine a utility function representing a performance metric for the network node based on transmissions from other network nodes using the shared channel; and
in response to determining that the utility function satisfies a threshold, grant the resources in the shared channel to the network node; wherein the utility function comprises an interference function that measures an impact of an interference level due to transmissions of the network node requesting the resources to the other network nodes, in the shared channel, and wherein the interference level is determined through a user value function and an evaluation grid.
10. The controlling node of claim 9 , wherein the interference function comprises one of Signal-to-Interference-plus Noise Ratio (SINR) and Signal Leakage-to-Noise Ratio (SLNR).
11. The controlling node of claim 9 , wherein the user value function reflects a service value that a user will receive from the network node.
12. The controlling node of claim 9 , wherein the user value function is dependent on a signal received from the network node and interferences generated by the other network nodes.
13. The controlling node of claim 9 , wherein the processor is further configured to calculate a relative user value, in a coverage area of the network node, wherein the relative user value is a difference of the user value before the network node is granted the resources in the shared channel and after the network node is granted the resources in the shared channel.
14. The controlling node of claim 13 , wherein the processor is further configured to determine an average relative user value, in which the determined relative user value is averaged over the coverage area of the network node.
15. The controlling node of claim 14 , wherein the processor is further configured to determine a total average relative user value, in which the determined total average relative user value is averaged over all the other network nodes using the shared channel.
16. The controlling node of claim 15 , wherein the processor is further configured to determine that the total average relative user value is equal or superior to the threshold.