Mobile communication system

• US 9,705,648 B2
• Filed: 03/18/2016
• Issued: 07/11/2017
• Est. Priority Date: 04/28/2009
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Mochizuki, Mitsuru, Maeda, Miho, Saegusa, Taiga, Iwane, Yasushi
• Primary Examiner(s): CHAN, SAI MING
• Application Number:
  US15/073,683
• Publication Number:
  US 20160198392A1
• Time in Patent Office: 480 Days
• Field of Search: 370328
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04B 7/0689 using different transmission schemes, at least one of them being a diversity transmission scheme
• CPC Class Codes: H04L 5/0033 each allocating device acting autonomously, i.e. without negotiation with other allocating devices
• CPC Class Codes: H04W 40/28 for reactive routing
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 72/52 based on load
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: H04W 88/16 Gateway arrangements

Abstract

The present invention relates to a mobile communication system having a coordinated communication mode in which radio communication is performed between a user equipment and a plurality of base stations in a coordinated manner and an uncoordinated communication mode in which radio communication is performed between a user equipment and a base station without coordinating with another base station, in which radio communication is performed by selectively using any of the coordinated communication mode and the uncoordinated communication mode. The coordinated communication in which radio communication is performed between a user equipment and a plurality of base stations in a coordinated manner and the uncoordinated communication in which radio communication is performed between a user equipment and a base station without coordinating with another base station are selectively used in an appropriate manner, with the result that a mobile communication system capable of exerting its performance in accordance with a situation can be provided.

Claims

1. A mobile communication system, which has a coordinated communication mode in which radio communication is performed between a user equipment and a plurality of base stations in a coordinated manner and an uncoordinated communication mode in which radio communication is performed between a user equipment and a base station without coordinating with another base station,

wherein radio communication is performed by selectively using any of said coordinated communication mode and said uncoordinated communication mode in accordance with an operation state of said user equipment.

4. The mobile communication system of claim 1, wherein the operation state of said user equipment is one of a connected state and an idle state.

2. A base station, which has a coordinated communication mode in which radio communication is performed between a user equipment and said base station with coordinating with another base station and an uncoordinated communication mode in which radio communication is performed between a user equipment and said base station without coordinating with another base station,

wherein radio communication is performed by selectively using any of said coordinated communication mode and said uncoordinated communication mode in accordance with an operation state of said user equipment.

3. A user equipment, which has a coordinated communication mode in which radio communication is performed between a base station coordinated with another base station and said user equipment and an uncoordinated communication mode in which radio communication is performed between a base station uncoordinated with another base station and said user equipment,

wherein radio communication is performed by selectively using any of said coordinated communication mode and said uncoordinated communication mode in accordance with an operation state of said user equipment.