IP Library Granted Patent US 9,730,213
Granted Patent B2
US 9,730,213 · App. 15/181,129 · Granted Aug 8, 2017

Communication system

Inventors: Miho Maeda (Tokyo, JP); Mitsuru Mochizuki (Tokyo, JP)
Assignee: MITSUBISHI ELECTRIC CORPORATION
H04W72/0426H04B17/327H04W52/143H04W52/146H04W52/244H04W52/40H04W72/04H04B7/022
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Quick Facts
Patent No.
US 9,730,213
App. No.
15/181,129
Granted
Aug 8, 2017
Kind
B2
Abstract

A communication system includes a movable terminal device and a plurality of communication devices configured to perform radio communication with the terminal device. The communication devices include a large-scale communication device having a first range in which communication with said terminal device is possible and a small-scale communication device having a second range in which said communication is possible. The first range is larger than the second range. A handover of the terminal device from the large-scale communication device to the small-scale communication device is prohibited whenever (a) the small-scale communication device is connected with the large-scale communication device by a dedicated line, (b) said small-scale communication device operates by using functionality of the large-scale communication device, or (c) the small-scale communication device is located within the first range of the large-scale communication device.

Claims (7)

1. A communication system comprising:

a movable terminal device; and

a plurality of communication devices configured to perform radio communication with said terminal device, wherein

said plurality of communication devices include a large-scale communication device having a first range in which communication with said terminal device is possible and a small-scale communication device having a second range in which said communication is possible, the first range being larger than the second range,

a handover of said terminal device from said large-scale communication device to said small-scale communication device is prohibited whenever (a) said small-scale communication device is connected with said large-scale communication device by a dedicated line, (b) said small-scale communication device operates by using functionality of said large-scale communication device, or (c) said small-scale communication device is located within the first range of said large-scale communication device.

2. The communication system according to claim 1 , wherein said handover is prohibited when the second range is larger than a threshold range.

3. The communication system according to claim 2 , wherein said threshold range of said small-scale communication device is determined based on a currently active downlink transmission power of said small-scale communication device.

Priority Claims (1)
JP 2011-081799 · Apr 1, 2011 · national
Continuity (2)
Continuation 14009226
Related Publication 20160323877A1 · Nov 3, 2016