Control node and method thereof
The disclosure relates to a control node. The first control node comprises a transceiver configured to receive a first set of Channel State Information, CSI, comprising CSI for radio channels between a plurality of first remote radio heads and a plurality of user devices, a processor configured to determine a first association based on the first set of CSI, wherein the first association comprises an association between the plurality of first remote radio heads and the first control node. Furthermore, the disclosure also relates to a corresponding method, a cellular wireless communication system, and a non-transitory computer readable medium.
1. A first control node for a wireless communication system, the first control node comprising:
a processor; and
a non-transitory computer readable medium storing computer executable instructions, that when executed by the processor cause the following steps to be executed:
receiving a first set of Channel State Information (CSI) comprising radio channels between a plurality of first remote radio heads and a plurality of user devices;
determining a first association based on the first set of CSI, wherein the first association comprises an association between the plurality of first remote radio heads and the first control node;
receiving a second set of CSI from a second control node, wherein the second set of CSI comprises CSI for radio channels between a plurality of second remote radio heads and the plurality of user devices; and
determining the first association based on a concatenation of the first set of CSI and the second set of CSI.
2. The first control node according to claim 1 , wherein determining the first association further includes instructions comprising:
computing at least one cross coupling between the plurality of first remote radio heads and the plurality of user devices based on the first set of CSI; and
determining the first association based on the computed cross coupling.
3. The first control node according to claim 2 , wherein determining the first association further includes instructions comprising:
computing a first cross coupling between the plurality of first remote radio heads and the plurality of user devices for a first candidate association;
computing at least one second cross coupling between the plurality of first remote radio heads and the plurality of user devices for a second candidate association,
determining the first association by selecting the first candidate association or the second candidate association having the lowest cross coupling.
4. The first control node according to claim 3 , wherein determining the first association further includes instructions for iteratively performing the following steps:
computing the first cross coupling;
computing the second cross coupling; and
determining the first association.
5. The first control node according to claim 1 , further including instructions comprising:
transmitting the first association to the second control node.
6. The first control node according to claim 1 , further including instructions comprising:
transmitting the first set of CSI to the second control node.
7. The first control node according to claim 1 , further including instructions comprising:
determining a first trigger comprising an instruction for the second control node to determine a second association between the plurality of second remote radio heads and the second control node; and
transmitting the first trigger to the second control node.
8. The first control node according to claim 1 , further including instructions comprising:
receiving a second trigger from the second control node, the second trigger comprising an instruction for the first control node to determine the first association; and
determining the first association in response to the reception of the second trigger.
9. The first control node according to claim 1 , further including instructions comprising:
transmitting the first association to the plurality of first remote radio heads.
10. The first control node according to claim 1 , wherein the association between the plurality of first remote radio heads and the first control node comprises assignment of the plurality of first remote radio heads to the first control node.
11. A method for a wireless communication system the method comprising:
receiving a first set of Channel State Information (CSI) comprising radio channels between a plurality of first remote radio heads and a plurality of user devices;
determining a first association based on the first set of CSI, wherein the first association comprises an association between the plurality of first remote radio heads and a first control node;
receiving a second set of CSI from a second control node, wherein the second set of CSI comprises CSI for radio channels between a plurality of second remote radio heads and the plurality of user devices; and
determining the first association based on a concatenation of the first set of CSI and the second set of CSI.
12. The method according to claim 11 , further comprising:
transmitting the first association to the second control node.
13. The method according to claim 11 , further comprising:
transmitting the first set of CSI to the second control node.
14. The method according to claim 11 , further comprising:
determining a first trigger comprising an instruction for the second control node to determine a second association between the plurality of second remote radio heads and the second control node; and
transmitting the first trigger to the second control node.
15. The method according to claim 11 , further comprising:
receiving a second trigger from the second control node, the second trigger comprising an instruction for the first control node to determine the first association; and
determining the first association in response to the reception of the second trigger.
16. A non-transitory computer readable medium storing a program code, the program code comprising instructions for performing a method comprising:
receiving a first set of Channel State Information (CSI) comprising radio channels between a plurality of first remote radio heads and a plurality of user devices;
determining a first association based on the first set of CSI, wherein the first association comprises an association between the plurality of first remote radio heads and a first control node;
receiving a second set of CSI from a second control node, wherein the second set of CSI comprises CSI for radio channels between a plurality of second remote radio heads and the plurality of user devices; and
determining the first association based on a concatenation of the first set of CSI and the second set of CSI.
17. The non-transitory computer readable medium according to claim 16 , further comprising instructions for:
transmitting the first association to the second control node.
18. The non-transitory computer readable medium according to claim 16 , further comprising instructions for:
transmitting the first set of CSI to the second control node.
19. The non-transitory computer readable medium according to claim 16 , further comprising instructions for:
determining a first trigger comprising an instruction for the second control node to determine a second association between the plurality of second remote radio heads and the second control node; and
transmitting the first trigger to the second control node.