COMMUNICATION SYSTEM

• US 20150237514A1
• Filed: 05/05/2015
• Published: 08/20/2015
• Est. Priority Date: 02/10/2011
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: MAEDA, Miho, Mochizuki, Mitsuru
• Granted Patent: US 9,386,467 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 48/02 Access restriction performed under specific conditions
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 76/15 Setup of multiple wireless link connections
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

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 cell1 and a cell2 of a base station A, RRC connection is established between the cell1 and a UE, and the cell1 becomes a primary cell (PCell). Then, in Step ST1418, the cell1 determines to configure the cell2 as a secondary cell (SCell) to be aggregated with the own cell. Then, the cell1 notifies the UE of the above in Step ST1419. Upon this notification, the operation of restricting access to the cell2 from the UE is stopped by an MME, and thereafter, communication between the UE and the cell2 is started in Step ST1422.

Claims

1. A communication system comprising a communication terminal device, a base station device configured to perform radio communication with said communication terminal device, and a host node device that restricts the connection between said communication terminal device and said base station device, wherein

said base station device provides a plurality of cells formed of component carriers having different frequencies, said base station device aggregating two or more cells of said plurality of cells and transmitting and receiving component carriers of the aggregated cells in parallel to perform radio communication with said communication terminal device,

upon establishment of radio connection between any one of said plurality of cells and said communication terminal device, the connected cell configures any of other cells as an aggregable cell that is allowed to be aggregated with the own cell, said connected cell being a cell in which radio connection with said communication terminal device has been established, and

upon said aggregable cell being configured by said connected cell:

said host node device stops an operation of restricting access to said aggregable cell; and

said communication terminal device stops an operation of restricting access to said aggregable cell.