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Mobile Phone Patent Abstract
The invention relates a method for detecting and controlling a standby
mobile phone, including the steps: simulating the function of a
standby mobile phone and selecting current service cell; monitoring
and recording the system information and the system signal strength
of the current cell; selecting a frequency as a new frequency; monitoring
and recording the Base Station Identity Code (BSIC); analyzing and
amending the system information; transmitting the pseudo-system
information and the amended BSIC; the standby mobile phone receiving
and analyzing the pseudo-system information and the amended BSIC;
the standby mobile phone voluntarily requesting to establish a radio
link connection; and the standby mobile phone being granted to access
and establish the requested radio link connection, thereafter the
phone being controlled. According to the method of the invention,
a standby mobile phone can be accurately detected and controlled
in those sensitive points so as to eliminate the influence of the
radio signals produced by the standby mobile phone. This method
may record the standby phone number.
Mobile Phone Patent Claims
What we claim is:
1. A method for detecting and controlling a standby mobile phone,
comprising the steps of: (1) simulating the function of a standby
mobile phone and selecting current service cell; (2) monitoring
and recording the system information and the system signal strength
of the current service cell; (3) selecting a frequency from a Broadcast
Control Channel (BCCH) frequency-list of an adjacent cell as a new
frequency; (4) monitoring and recording a Base Station Identity
Code (BSIC) issued in a Synchronization Channel (SCH) according
to said new frequency; (5) analyzing and amending the system information
obtained in step (2) and the BSIC recorded in step (4), wherein
the amended system information is pseudo-system information; (6)
transmitting the pseudo-system information in the BCCH and the amended
BSIC in Synchronization Channel (SCH) according to the new frequency
obtained in step (3); (7) the standby mobile phone receiving and
analyzing the pseudo-system information and the amended BSIC; (8)
the standby mobile phone voluntarily requesting to establish a radio
link connection; and (9) the standby mobile phone being granted
to access and establish the requested radio link connection, and
being controlled via said radio link connection.
2. A method as claimed in claim 1, wherein the current system information
monitored and recorded in step (2) includes the cell identity, the
location area identity, the BCCH frequency list of an adjacent cell,
the cell reselection parameters and the maximum power level of the
control channel.
3. A method as claimed in claim 1, wherein the new frequency is
selected from such a cell whose signal strength is weakest.
4. A method as claimed in claim 1, wherein the amended system information
in step (5) includes the cell identity, the location area identity,
the cell reselection parameters and the maximum power level of the
control channel.
5. A method as claimed in claim 4, wherein the signal strength
for transmitting the pseudo-system information and the amended BSIC
in step (6) are calculated by using the cell selection and reselection
equations and physics equations according to controlling radius
and network signal strength.
6. A method as claimed in claim 1, wherein the control step (9)
further includes the following steps: (1) the standby mobile phone
transmitting a Location Updating Request in a Stand-alone Dedicated
Control Channel (SDCCH); (2) the standby phone being inquired about
its identity in the SDCCH; (3) the phone transmitting its own identity
in the SDCCH in responding to the inquiring; and (4) the phone's
International Mobile Station Identity (IMSI) and International Mobile
Equipment Identification (IMEI) and Temporary Mobile Subscriber
Identity being recorded.
7. A method as claimed in claim 1, wherein the control step (9)
further includes the following steps: (1) the standby phone transmitting
a Location Updating Request; and (2) the Location Updating Request
transmitted by the standby phone being refused on the basis of the
phone is deemed illegal, so that the phone is disabled temporarily.
8. A method as claimed in claim 6, wherein the control step (9)further
includes the following steps: (1) the standby mobile phone transmitting
a Location Updating Request in a SDCCH; (2) the standby phone being
inquired about its identity in the SDCCH; (3) the phone transmitting
its own identity in the SDCCH in responding to the inquiring; (4)
the phone's International Mobile Station Identity (IMSI), International
Mobile Equipment Identification (IMEI) and Temporary Mobile Subscriber
Identity (TMSI) being recorded; and (5) the Location Updating Request
transmitted by the standby phone being accepted and the standby
phone receives a Paging signal to ring; alternatively, the Location
Updating Request being refused on the basis of the subscriber is
deemed illegal so that the phone is disabled temporarily.
Mobile Phone Patent Description
FIELD OF THE INVENTION
The present application relates to mobile communication, in particularly
to a method for detecting and controlling a standby mobile phone.
BACKGROUND OF THE INVENTION
Recently, as rapid development of economy, the number of subscribers
of mobile phone is significantly increasing. The high-tech mobile
communication has provided great convenience to people. However,
some points or sites such as radar stations, astronomic radio telescopes,
airplanes, which are sensitive to the strong radio signal are negatively
influenced. For instance, a mobile phone in working-state will produce
strong radio signals which interfere with the navigation of an airplane
even the phone is in standby state. In fact, the interference from
the mobile phone is always a big problem to be solved by the civil
aviation authorities in many countries. Up till now, no means or
instruments are provided to solve the problem effectively. Therefore,
it is a need to develop a method for detecting a standby mobile
phone in those sensitive points and controlling the detected phone.
An object of the present invention is to provide a method for detecting
and controlling a standby mobile phone. According to the method
of the invention, a standby mobile phone can be accurately detected
and controlled in those sensitive points so as to eliminate the
influence of the radio signals produced by the standby mobile phone.
This method may record the standby phone number.
SUMMARY OF THE INVENTION
According to the invention, a method for detecting and controlling
a standby mobile phone, comprising the following steps: (1) simulating
the function of a standby mobile phone and selecting current service
cell; (2) monitoring and recording the system information and the
system signal strength of the current cell; (3) selecting a frequency
from a Broadcast Control Channel (BCCH) frequency-list of an adjacent
cell as a new frequency; (4) monitoring and recording the Base Station
Identity Code (BSIC) issued in a Synchronization Channel (SCH) according
to said new frequency; (5) analyzing and amending the system information
obtained in step (2) and the BSIC recorded in step (4), wherein
the amended system information is called as pseudo-system information;
(6) transmitting the pseudo-system information in the Broadcast
Control Channel (BCCH) and the amended BSIC in synchronization channel
(SCH) according to the new frequency obtained in step (3); (7) the
standby mobile phone receiving and analyzing the pseudo-system information
and the amended BSIC; (8) the standby mobile phone voluntarily requesting
to establish a radio link connection; and (9) the standby mobile
phone being granted to access and establish the requested radio
link connection, thereafter the phone being controlled.
Said current system information monitored and recorded in step
(2) includes the cell identity, the location area identity, the
BCCH frequency list of an adjacent cell, the cell reselection parameters
(including cell reselection offset parameter) and the maximum power
level of the control channel. The pseudo-system information in step
(5) includes the cell identity, the location area identity, the
cell reselection parameters (including cell reselection offset parameter)
and the maximum power level of the control channel.
When step (3) is performed, it is best to select a frequency from
an adjacent cell with the weakest signal strength as a new frequency.
The signal strength for transmitting the pseudo-system information
and the amended BSIC in step (6) are calculated by using the cell
selection and reselection equations and physics equations according
to controlling radius and network signal strength.
After a standby mobile phone is under the control, several controlling
modes will be proceeding with in view of the controlled standby
mobile phone.
Mode I (1) the standby mobile phone transmits a Location Updating
Request in a Stand-alone Dedicated Control Channel (SDCCH); (2)
the standby phone is inquired about its identity in the SDCCH; (3)
the phone transmits its own identity in the SDCCH in responding
to the inquiring; and (4) the phone's International Mobile Station
Identity (IMSI) and International Mobile Equipment Identification
(IMEI) and Temporary Mobile Subscriber Identity (TMSI) are recorded.
Mode II (1) the standby phone transmits a Location Updating Request;
and (2) the Location Updating Request transmitted by the standby
phone is refused on the basis of the mobile phone is deemed illegal,
so that the phone is disabled temporarily.
Mode III (1) the standby mobile phone transmits a Location Updating
Request in a SDCCH; (2) the standby phone is inquired about its
identity in the SDCCH; (3) the phone transmits its own identity
in the SDCCH in responding to the inquiring; (4) the phone's International
Mobile Station Identity (IMSI), International Mobile Equipment Identification
(IMEI) and Temporary Mobile Subscriber Identity (TMSI) are recorded;
and (5) the Location Updating Request transmitted by the standby
phone is accepted and the standby phone receives a Paging signal
to ring; alternatively, the Location Updating Request is refused
on the basis of the mobile phone is deemed illegal so that the phone
is disabled temporarily.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a processing flow chart of detecting and controlling
a standby mobile phone.
FIG. 2 is a message sequence chart of detecting and controlling
a standby mobile phone.
DETAILED DESCRIPTION OF THE INVENTION
The below is to describe the method of the invention in detail
accompanying with the appended drawings.
In FIG. 2, BCCH means a Broadcast Control Channel. SCH means a
Synchronization Channel. RACH means a Random Access Channel. AGCH
means an Access Grant Channel. SDCCH means Stand-alone Dedicated
Control Channel. PCH means a Paging Channel. The function of a mobile
phone detection apparatus as shown in FIG. 2 may be implemented
by simulating the relevant functions of a mobile phone, a base station
subsystem (BSS) and a mobile switching center (MSC).
As shown in FIGS. 1 and 2, the first step is performed by simulating
a mobile phone to select a current serving cell. This step can be
practically carried out by simulating the radio resource management
of the phone. Then, the system information and the system signal
strength of the selected current cell are monitored and recorded.
The information to be recorded includes the cell identity, location
area identity, the BCCH frequency list of an adjacent cell, cell
reselection parameters (including cell reselection offset parameter),
and the maximum power level of the control channel. In order to
enhance the accuracy of the pseudo system information, all information
of the current service cell may be recorded.
The third step is to select a frequency from the broadcast control
channel (BCCH) frequency list of an adjacent channel as a new frequency.
The new frequency is usually selected from such a cell whose signal
strength is weakest. In this way, it is possible to transmit the
pseudo-system information and BSIC in a lowest transmission power,
because the transmission power is relevant to the signal strength
of the cell to be selected. The fourth step is to monitor and record
the BSIC transmitted in Synchronization Channel according to the
new frequency. In the fifth step, the system information recorded
in step (2) and the BSIC recorded in step (4) are analyzed and amended.
The amended system information (called pseudo-system information)
includes the cell identity, the location area identity, the cell
reselection parameters (including cell reselection offset parameter)
and the maximum power level of the control channel. The purpose
for amending the cell reselection offset parameters CELL_RESELECT_OFFSET
is to enhance the priority level of a cell reselection so that all
mobile phone in the coverage area can be attracted with lower signal
strength which may be lower than the currently mobile network signal
strength. Since the BSIC of the phone detection apparatus is different
from that of the base station with the same BCCH frequency, the
existing network cannot be interfered. The amendments to the maximum
power level of the control channel MS_TXPWR_MAX_CCH is to make the
access power of a phone as low as possible so that the interference
produced by the signals of a phone is reduced at the very first
stage.
At the sixth step, according to the new frequency, the pseudo-system
information is transmitted in the Broadcast Control Channel and
the amended BSIC is transmitted in the synchronization channel.
This function may be implemented by simulating the radio resource
management of the base station subsystem. The signal strength for
transmitting the pseudo-system information and the amended BSIC
may be accurately calculated by means of some physic equations and
some mobile communication protocol which has prescribed some equations
for selecting a cell and for reselecting a cell based on the determined
control radium and the existing network signal strength.
At the seventh step, the standby mobile phone receives the pseudo-system
information and the amended BSIC and analyzes the same. As the cell
identity and location area identity in the received pseudo-system
information and the BSIC have already been changed and the priority
level of the cell reselection is relatively higher according to
the received pseudo-system information, the standby phone will consider
it is a suitable base station transceiver (DT3) and thus, the phone
will perform the location updating procedure. Before the location
updation, the phone should establish a radio link connection. So,
in the eighth step, the standby mobile phone voluntarily requests
to establish a radio link connection. The phone sends a Random Access
Request in the Random Access Channel. At the ninth step, the standby
phone is granted to access and establish a radio link connection.
In this condition, the standby phone is under the control. An Access
Grant Response is transmitted to the controlled standby phone in
the Access Grant Channel so as to establish a radio link connection.
This function may be implemented by simulating the radio resource
management in the base station subsystem.
After the radio link connection has been established, the phone
will be controlled through a lot of ways matching different purposes.
For instance, the phone's number can be recorded, the phone can
be disabled temporarily, the phone's number is recorded then the
phone is disabled, or the phone's number is recorded and the ring
is initiated, etc.
As shown in FIG. 2, after the radio link connection has been established,
the standby phone transmits a Location Updating Request in the allocated
SDCCH. If it is necessary to record the phone number, the identity
requests of the IMSI (International Mobile Station Identity, namely
SIM number), IEI (International Mobile Equipment Identity, namely
mobile phone number) and TMEI (Temporary Mobile Station Number)
are transmitted to the phone concerned for inquiring the number.
This function may be implemented by simulating the Mobility Management
in the Mobile Switching Center (MSC) and the radio resource management
in the base station subsystem (BSS). After receiving a signaling
for inquiring the number, the phone sends a response in the SDCCH
to report its own IMSI, IMEI and TMSI. If not necessary to record
the phone number, the phone can be disabled temporarily. In this
way, a signaling for refusing the location updating request is transmitted
to the phone and the phone is deemed illegal MS. Without transmitting
any radio signals, the disabled phone will not produce any interference
over those sensitive apparatus. Once the standby phone leaves the
defined area, it will be restored. This function may be implemented
by simulating the Mobility Management in the Mobile Switching Center
(MSC) and the Radio Resource management in the Base Station Subsystem
(BSS).
When the IMSI, IMEI and TMSI of a standby mobile phone are recorded,
alternative control is to have the phone temporarily invalid or
have the phone ring. If the phone is to ring, a signaling for accepting
the location updating request should be transmitted in the SDCCH
to the phone and then a paging information is sent in a PCH to the
phone by using the recorded TMSI and IMSI so that the phone is to
ring. If the phone is to be temporarily disabled, a signaling for
refusing the location updating request is transmitted in SDCCH to
the phone which is deemed to be illegal. Having the phone ring can
be implemented by simulating the Mobility Management and Call Control
of MSC and the Radio Resource management of the Base Station Subsystem.
According to the method, a standby mobile phone can be detected
in those sensitive points and can be forced to ring by receiving
a paging information. In this way, the subscriber of the phone is
reminded of powering off his phone. In some urgent case, a standby
phone can be temporarily disabled (it will be recovered and used
normally when the urgent condition is vanished.). So, it is possible
to eliminate any interference produced by the signals of a phone
over those sensitive points or apparatus. In addition, by using
the method according to the invention, a standby phone number will
be recorded so that some subscribers with bad-faith will be tracked.
The present invention can be easily implemented under the existing
telecommunication circumstances and does not cause any negative
influence to the existing network. Therefore, it is discerned that
the present invention will have bright prospect. |