Physical cell identifier (PCI) adaptation to mitigate interference in heterogeneous cellular network
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsMuhammad Kazmi, Gary Boudreau, Iana Siomina
Life of this patent
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Abstract
A first radio network node (HBS1) adapts its physical cell identifier (PCI1) based on a comparison of its PCI1 to a second PCI (PCI2) used by a neighboring interfering second radio network node (e.g., another HBS2 or a macro node). The first radio network node HBS1 determines the second PCI based on one or more radio measurements performed on a cell 402 and/or on a UE 404 served by the second node. The adaptation of the cell identifier PCI1 is used for one or more radio network management tasks, e.g., resource management such as interference mitigation in a heterogeneous network, radio network planning, etc.
Claims26
A method in a first radio network node associated with a first cell having a first cell identifier, comprising the steps of:
- performing radio signal measurements on radio signals in at least a second cell associated with a second radio network node
- determining a second cell identifier associated with the second cell based on the performed measurements,
- comparing the first cell identifier of the first radio network node with the determined second cell identifier of the second radio network node, and
- adapting the first cell identifier with the second cell identifier based on the comparing step including replacing the first cell identifier with the second cell identifier when the first cell identifier and the second cell identifier do not match.
A first radio network node associated with a first cell having a first cell identifier, comprising:
- processing circuitry configured to:
- perform radio signal measurements on radio signals in at least a second cell associated with a second radio network node,
- determine a second cell identifier associated with the second cell based on the performed measurements,
- compare the first cell identifier of the first radio network node with the determined second cell identifier of the second radio network node, and
- adapt the first cell identifier with the second cell identifier, based on the comparison, by replacing the first cell identifier with the second cell identifier when the first cell identifier and the second cell identifier do not match.
Dependencies are inferred from the claim text.