Method and apparatus of physical cell identifier allocation
AssigneeHuawei Technologies Co., Ltd.
InventorsHenrik Olofsson, Xuelong Wang, Binsong Tang, Huan Zhang, Xiaoli Shi
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Abstract
A method and apparatus of allocating a Physical Cell Identifier (PCI) is disclosed in an embodiment of the present invention allowing different cells to operate on different frequencies while eliminating or reducing risk of PCI conflicts. Thereby PCI allocation is provided that is effective also in a multi-frequency environment.
Claims23
A method for obtaining physical cell identifier for a first cell in a wireless cellular communication system, comprising:
- obtaining a first list of physical cell identifiers;
- obtaining a second list of physical cell identifiers;
- obtaining a third list of physical cell identifiers by removing, from the first list, the physical cell identifiers in the second list;
- selecting, for the first cell, a physical cell identifier from the third list;
- wherein the obtaining of the second list is performed by communicating frequency information and physical cell identifier over X2 interface.
A base station for obtaining physical cell identifier in a wireless cellular communication system, comprising:
- a first module configured to obtain a first list of physical cell identifiers;
- a second module configured to obtain a second list of physical cell identifiers;
- a third module configured to obtain a third list of physical cell identifiers by removing, from the first list, the physical cell identifiers in the second list;
- a fourth module configured to select, for a first cell served by the base station, a physical cell identifier from the third list;
- wherein the obtaining of the second list is performed by communicating frequency information and physical cell identifier over X2 interface.
A computer-readable medium having stored thereon computer-executable instructions for obtaining physical cell identifier for a first cell in a wireless cellular communication system, wherein the instructions comprises:
- obtaining a first list of physical cell identifiers;
- obtaining a second list of physical cell identifiers;
- obtaining a third list of physical cell identifiers by removing from the first list the physical cell identifiers in the second list;
- selecting, for the first cell, a physical cell identifier from the third list;
- wherein the obtaining of the second list is performed by communicating frequency information and physical identifier over X2 interface.
A method for communicating physical cell identifier in a wireless cellular communication system, comprising:
- receiving an X2 setup request message, wherein the X2 setup request message contains information of operating frequency of a first cell;
- sending an X2 setup response message, wherein the X2 setup response message contains information of the first cell's at least one neighboring cell;
- wherein the information of the first cell's the at least one neighboring cell comprises physical cell identifier.
Dependencies are inferred from the claim text.