Method and apparatus for avoiding collision of uplink preamble using cell identifier
AssigneeElectronics and Telecommunications Research Institute
InventorChan Yong Lee
Life of this patent
Estimating the term…
Abstract
A method and apparatus for avoiding a collision of an uplink preamble using a cell identifier. In a case of installing a new small-sized base station in a mobile communication system, the method and apparatus may set a code parameter, a time parameter, and a frequency parameter, differently from a neighboring small-sized base station using the cell identifier even when dedicatedly using a preamble in a contention-free scheme to avoid a collision of the preamble, so that a random access preamble may be managed without occurrence of the collision with the neighboring small-sized base stations.
Claims11
An apparatus for avoiding collision of a preamble in a small-sized base station, the apparatus comprising:
- a neighboring cell identifying unit to collect a cell identifier of a neighboring cell to verify presence/absence of the neighboring cell and to identify the neighboring cell;
- a parameter requesting unit to generate a parameter request message requesting a setting of parameters and including the cell identifier of the neighboring cell, and to transmit the generated parameter request message to an operation administration maintenance (OAM);
- and
- a parameter setting unit to verify an allocated cell identifier included in a parameter response message and parameters corresponding to the allocated cell identifier when receiving the parameter response message from the OAM, and to set a preamble using the verified parameters.
An apparatus for avoiding collision of a preamble in an operation administration maintenance (OAM), the apparatus comprising:
- a parameter request reception unit to verify a cell identifier of a neighboring cell included in a parameter request message when receiving the parameter request message from a small-sized base station being incapable of independently setting a parameter;
- a mapping database to store predetermined parameters corresponding to each of predetermined cell identifiers;
- a cell identifier allocation unit to select, from the mapping database, a cell identifier unused in neighboring cells, and to allocate the selected cell identifier to a corresponding small-sized base station;
- and
- a parameter response processing unit to verify, in the mapping database, parameters corresponding to the allocated cell identifier, to generate a parameter response message including the allocated cell identifier and the parameters corresponding to the allocated cell identifier, and to transmit the generated parameter response message to the small-sized base station.
A method for avoiding a collision of a preamble in a small-sized base station, the method comprising:
- collecting a cell identifier of a neighboring cell to verify presence/absence of the neighboring cells, and to identify the neighboring cell;
- generating a parameter request message including the cell identifier of the neighboring cell requesting a setting of parameters, transmitting the generated parameter request message;
- and
- verifying an allocated cell identifier included in the parameter request message and parameters corresponding to the allocated cell identifier when receiving a parameter response message from an OAM;
- and
- setting the preamble using the verified parameters.
A method for avoiding collision of a preamble in an OAM, the method comprising:
- verifying a cell identifier of a neighboring cell included in a parameter request message when receiving the parameter request message from a small-sized base station being incapable of independently setting a parameter;
- selecting, from a mapping database where predetermined parameters corresponding to each of predetermined cell identifiers are stored, a cell identifier unused in neighboring cells, and allocating, to the small-sized base station, the selected cell identifier as a cell identifier of the small-sized base station;
- verifying, in the mapping database, parameters corresponding to the allocated cell identifier;
- and
- generating a parameter response message including the allocated cell identifier and parameters corresponding to the allocated cell identifier, and transmitting the generated parameter response message to the small-sized base station.
Dependencies are inferred from the claim text.