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Communication System, Communication Terminal Device And Primary Cell
Abstract: The present invention has an object to provide a communication system capable of appropriately providing services while improving a data rate using carrier aggregation. In Step ST1408, of a cell 1 and a cell 2 of a base station A, RRC connection is established between the cell 1 and a UE, and the cell 1 becomes a primary cell (PCell). Then, in step ST1418, the cell 1 determines to configure the cell 2 as a secondary cell (SCell) to be aggregated with the own cell. Then, the cell 1 notifies the UE of the above in Step ST1419. Upon this notification, the operation of restricting access to the cell 2 from the UE is stopped by an MME, and thereafter, communication between the UE and the cell 2 is started in Step ST1422. Fig 14.
Notices, Deadlines & Correspondence
Patent Information
Applicants
MITSUBISHI ELECTRIC CORPORATION
Inventors
1. MAEDA, Miho
2. MOCHIZUKI, Mitsuru
Specification
We Claim:
1. A communication system comprising:
a communication terminal device; and
a plurality of cells configured to perform radio communication with the communication terminal device, wherein
on a condition that a connection is established between the communication terminal device and a primary cell that is one of the plurality of cells,
the communication terminal device judges whether or not access to a candidate cell that is a candidate for a secondary cell to perform radio communication in parallel with the primary cell is allowed, and notifies the primary cell of a judgment result, and
the primary cell configures the candidate cell as the secondary cell when the judgment result of the communication terminal device indicates that the communication terminal device is allowed access to the candidate cell.
2. The communication system as claimed in claim 1, wherein
the plurality of cells include a cell for specific subscribers that
specifies a connectable communication terminal device,
the candidate cell notifies the communication terminal device of specific subscribers information that is information regarding the specific subscribers of the candidate cell, on the condition that the connection is established between the communication terminal device and the primary cell that is one of the plurality of cells, and
the communication terminal device judges whether or not access to the candidate cell is allowed based on the specific subscribers information notified from the candidate cell.
3. A communication terminal device in a communication system
comprising:
the communication terminal device; and
a plurality of cells configured to perform radio communication with the communication terminal device, wherein
on a condition that a connection is established between the communication terminal device and a primary cell that is one of the plurality of cells, the communication terminal device judges whether or not access to a candidate cell that is a candidate for a secondary cell to perform radio communication in parallel with the primary cell is allowed, and notifies the primary cell of a judgment result.
4. A primary cell in a communication system comprising:
a communication terminal device; and
a plurality of cells configured to perform radio communication with the communication terminal device, wherein
on a condition that a connection is established between the communication terminal device and a primary cell that is one of the plurality of cells, the communication terminal device judges whether or not access to a candidate cell that is a candidate for a secondary cell to perform radio
communication in parallel with the primary cell is allowed, and notifies the primary cell of a judgment result, and
the primary cell configures the candidate cell as the secondary cell when the judgment result of the communication terminal device indicates that the communication terminal device is allowed access to the candidate cell.