Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
1996-12-23
2001-01-23
Vo, Nguyen (Department: 2745)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S435100
Reexamination Certificate
active
06178325
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a communication device, and more particularly to a radio communication device in which a plurality of communication services can be utilized with one unit of radio communication device.
BACKGROUND OF THE INVENTION
In recent years, mobile satellite communications has been developing for commercial use. However, telephone charges in satellite communications are generally expensive, and power consumption is far greater as compared to that in a mobile terminal providing services from a ground station. Accordingly, a user usually uses services in a ground system as much as possible in an area where the ground system can be used, and uses a satellite system in an area where the ground system can not be used. In the system described above, it is desirable that services in the satellite system and those in the ground system are utilized with one terminal unit from view points of reduction in a required number of terminals as well as of user's convenience.
FIG. 10
is a block diagram showing a relation between a plurality of radio communication services and multiple services radio communication device in a communication system based on the conventional technology and showing the radio communication device for the same. In the figure, designated at reference numeral
1
is a cellular service radio communication device, at
2
a satellite service radio communication device, at
3
a multiple services radio communication device including therein the cellular service communication device
1
and the satellite service communication device
2
. The reference numeral
1
a
indicates a service A communication control section provided in the cellular service radio communication device
1
and for catching lines for service A and controlling communications, and the reference numeral
2
a
indicates a service B communication control section provided in the satellite service radio communication device
2
and for catching lines for service B and controlling communications. Herein, the service A corresponds to the cellular service, while the service B corresponds to the satellite service.
The reference numeral
4
indicates a base station of the communication system interfacing to radio communication services for providing services, for example services A and B, to the multiple services radio communication device
3
. The reference numerals
5
a
,
5
b
indicate a transmission path for position registration signals comprising analog signals or digital signals to the radio communication services A and B respectively. The reference numerals
1
b
,
2
b
indicate a transmission path for signals indicating a situation for catching receiving lines for each of services from the services A, B communication control sections respectively. The reference numeral
1
c
,
2
c
indicate a transmission path for signals indicating services each provided to a user respectively. The reference numeral
6
indicates multiple services switching communication control section. The reference numeral
6
a
indicates a transmission path for a signal indicating which of the services is being provided to a user, and the reference numeral
6
b
indicates a transmission path for a signal indicating contents of a service selected by and transmitted from a user.
Next description is made for an operation for switching services provided to a user and a position registering operation in the multiple services radio communication device.
Signals
1
b
,
2
b
each indicating a situation of catching receiving lines for services A and B respectively are transmitted from the service A communication control section
1
a
and service B communication control section
2
a
to the multiple services switching communication control section
6
. The multiple services switching communication control section
6
receives these signals
1
b
,
2
b
, and analyzes and determines which of the services from the service A and service B should be provided to a user.
Then the multiple services switching communication control section
6
outputs signals
1
c
,
2
c
each indicating a new service provided to a user as a result of analysis of the signals respectively to the service A communication control section
1
a
as well as to the service B communication control section
2
a
. The service A communication control section
1
a
and the service B communication control section
2
a
understand which of the services is to be provided to the user by receiving the result, and as a result, the communication control section
1
a
or
2
a
which is to control a service to be provided anew executes position registration. Furthermore the multiple services switching communication control section
6
informs the user of the service which has been selected with the signal
6
a.
The multiple services switching communication control section
6
switches the service to one to be provided to the user, in response to the request
6
b
from the user, by outputting the signals
1
c
,
2
c
indicating the service, and can execute position registration for the communication control section
1
a
or
2
a
for controlling the selected new service.
As described above, in the radio communication system based on the conventional technology, each time when a service to be provided to a user is changed, position registration for a base station for the next new service has to be executed.
Next, description is made for a mechanism of generation of unnecessary position registration between the base station and a terminal in the radio communication system based on the conventional technology.
FIGS. 11A
to
11
C are views showing a sequence of position registration in the radio communication system based on the conventional technology.
FIG. 11A
shows a state
1
,
FIG. 11B
shows a state
2
, and
FIG. 11C
shows a state
3
respectively.
At first, description is made for the state
1
with reference to FIG.
11
A. The multiple services radio communication device
3
, which is a terminal, catches a line for the service A, and executes position registration therefor. On the other hand, the multiple services radio communication device
3
does not execute position registration for the service B.
In this step, the service A in the side of base station recognizes that the position of this terminal has been registered under the service A. The multiple services radio communication device
3
, which is a side of terminal, also recognizes that the position registration for the service A is completed.
Next description is made for the state
2
with reference to FIG.
11
B. In the state
2
, it is assumed that a service provided to a user is automatically or manually switched from the service A to the service B. However, in a case where position registration for the service B is failed for some reasons or other, the service B, which is the side of base station, recognizes that position registration of the terminal, i.e. of the communication system device
3
, has not been executed under the service. On the other hand, the service A still has recognition that the position registration has continuously been kept under the service.
Furthermore, description is made for the state
3
with reference to FIG.
11
C. In the state
3
, it is assumed that a service provided to a user is automatically or manually returned to the service A. In this step, in the position registration control based on the conventional technology, a position is registered again to the service A. However, execution of the position registration at the second time is not required because the service A, which is the side of base station, still has kept the recognition that the position registration for the terminal has been completed even if the position registration has not been executed in this step.
As described above, by executing position registration each time when a service provided to a user is changed, an unnecessary control of position registration for the base station is generated, and the terminal side executes position registration which is unnecessary for
Mitsubishi Denki & Kabushiki Kaisha
Rothwell Figg Ernst & Manbeck
Vo Nguyen
LandOfFree
Communication device having position registration in a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Communication device having position registration in a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Communication device having position registration in a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2515578