JP4320416B2 - Mobile phone, switching execution determination method, switching execution determination program - Google Patents

Mobile phone, switching execution determination method, switching execution determination program Download PDF

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JP4320416B2
JP4320416B2 JP2005006164A JP2005006164A JP4320416B2 JP 4320416 B2 JP4320416 B2 JP 4320416B2 JP 2005006164 A JP2005006164 A JP 2005006164A JP 2005006164 A JP2005006164 A JP 2005006164A JP 4320416 B2 JP4320416 B2 JP 4320416B2
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environment
mobile phone
switching
success rate
reception level
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義朗 大森
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日本電気株式会社
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  The present invention relates to a mobile phone characterized by switching an active system used in a mobile phone corresponding to a plurality of mobile phone systems (hereinafter referred to as “systems”), and whether or not to perform the switching. The present invention relates to a switching execution determination method for determining the above and a switching execution determination program for executing the method. Examples of systems supported by mobile phones include GSM (Global System for Moblie Communications), which is one of the second-generation mobile phone wireless communication systems (hereinafter referred to as “2G”), and third systems. There is W-CDMA (Wideband Code Division Multiple Access) which is one of the wireless communication systems (hereinafter referred to as “3G”) of the next generation mobile phones. The mobile phone of the present invention is particularly compatible with both 2G and 3G systems, and the switching execution determination method and the switching execution determination program of the present invention particularly switch from a 2G system to a 3G system. And a method and program for switching from a 3G system to a 2G system.

  An index based on the value calculated from the reception level of a common channel such as 3GPP 25.304 (hereinafter referred to as “R”) is used as a method for determining whether to perform system switching in a mobile phone that supports multiple systems. Is generally used. “Reception level” is the strength of the radio wave received by the mobile phone. For example, in the case of 3G, CPICH (Common Pilot Channel) RSCP (Received Signal Code Power) and Ec / No (Received energy per chip divided by the Power density in the band) is typical.

  The index is expressed as “R (X)” as representing the level of reception level. Here, “X” may be a wireless communication system using one active system, or may be a parameter for performing a predetermined calculation for obtaining the magnitude of the reception level. For example, R (3G) and R (2G) are indices representing the magnitudes of reception levels when using a 3G system and a 2G system, respectively. R (Hyst) is a hysteresis for suppressing frequent switching of systems. At this time, if 3R is active and “R (3G) + R (Hyst) <R (2G)”, the system is switched from 3G to 2G. By this switching, it is possible to use a wireless communication system that can better make a call using a mobile phone. The above measures are the same when the system is switched from 2G to 3G.

  However, “R (X)” is a value calculated from the reception level, and does not necessarily match the user's usability. That is, it does not match the usage status of the mobile phone by the user, such as whether the mobile phone is stationary or moving, the usage frequency of the mobile phone, the call duration, and the type of data to be transmitted / received such as voice data / image data. For this reason, in the conventional method, for example, even in an environment where there is a high possibility that a failure of outgoing call or incoming call occurs in an active system of 3G, the reception level is “R (3G) + R (Hyst) < Since the condition of “R (2G)” is not satisfied, there arises a problem that the system is not switched to 2G. Conversely, the 3G active system satisfies the condition of “R (3G) + R (Hyst) <R (2G)” even in an environment where there is a low possibility of an outgoing or incoming call failure. There were problems such as switching the system to 2G.

  The above problem will be specifically described with reference to FIG. FIG. 5 shows the size of a reception level of a common channel or the like in each of the 3G and 2G systems related to a mobile phone, and the success rate (hereinafter simply referred to as “success rate”) in the past outgoing / incoming calls at that reception level. It is a figure showing these relationships. The success rate has the number of successes and failures of outgoing / incoming calls and can be expressed as “success number / (success number + failure number)”. In FIG. 5, the reception level is converted into a 10-level evaluation. “R (3G)” represents the magnitude of the 3G reception level, and “R (2G)” represents the magnitude of the 2G reception level. The active system is 3G. Here, R (Hyst) = 1. Although this relationship is an example, it is reasonable considering the normal usage situation of the mobile phone. The above problem appears in the following case.

Case 1 3G reception level = 2, 2G reception level = 2 environment.
According to the above-described conventional method, “R (3G) = 2 + R (Hyst) = 1 <R (2G) = 2” and the system switching condition is not satisfied. Therefore, without switching to a 2G environment with a success rate of 80%, the user will remain in a 3G environment with a success rate of 30%.

Case 2 3G reception level = 4, 2G reception level = 6 environment.
According to the above-described conventional method, “R (3G) = 4 + R (Hyst) = 1 <R (2G) = 6” is satisfied, and the system switching condition is satisfied. Therefore, system switching occurs. Therefore, even if the environment is a 3G environment with a success rate of 100%, a transition is made to 2G with a success rate of 90%.

  From the above description, when switching the system, it is more appropriate to determine from the success rate itself than to determine based on the reception level. The success rate is a parameter that well represents the user's usability, and is calculated from the past outgoing / incoming situations. And it is thought that a user's utilization condition will become excellent by switching to a system with a higher success rate.

For example, as described in Patent Documents 1 and 2, a specific value similar to the success rate is calculated from the number of successes and failures of incoming and outgoing calls, the quality of the communication line is obtained, and good based on the quality The technical contents that can perform simple communication are disclosed. However, there are no documents that disclose the technical contents used for determining whether or not to switch the system based on the number of successful calls and the number of failed calls, including Patent Documents 1 and 2, at the time of filing of the present application. .
JP 2002-095046 A Japanese Patent Laid-Open No. 9-219697

  In view of the above problems, the problem to be solved by the present invention is to improve the usage situation of the mobile phone by the user by switching the system based on the success rate in the past outgoing / incoming calls. That is.

An aspect of the present invention that solves the above problems includes a radio unit that receives radio waves and determines a reception level of the radio waves, and a control unit that comprehensively controls information processing in each unit. Correspondingly, in a mobile phone that switches the mobile telephone system under the control of the control unit, each mobile telephone system has a history regarding the success or failure of incoming / outgoing calls corresponding to each of the reception levels, and the control unit Whether to determine the success or failure of a call, calculate the success rate of incoming and outgoing calls by statistics of the history, and switch the mobile telephone system based on the success rate and the reception level determined by the radio unit It is to determine whether or not.

  Furthermore, it has a memory | storage part which memorize | stores the data concerning the said log | history, and when the said control part determines the success or failure of the incoming / outgoing call, the data concerning the said log | history are updated in the said memory | storage part.

At this time, when the number of times of switching base stations that transmit radio waves received by the radio unit is less than or equal to a predetermined number in a predetermined period, a stationary environment that is an environment in which a mobile phone is used, and radio waves that are received by the radio unit are transmitted. times for switching the base station when there is mobile environment is an environment that uses the mobile phone when the predetermined number of times or more in a predetermined period, before term memory unit, the data and the mobile environment according to the history of the stationary environment By storing both of the data related to the history in, the control unit performs both determination of success or failure of incoming and outgoing calls in the stationary environment and determination of success or failure of incoming and outgoing calls in the mobile environment, and statistics the history The success rate of incoming / outgoing calls in the stationary environment and the success rate of outgoing / incoming calls in the mobile environment are calculated, and either ring of the stationary environment or the mobile environment is calculated. It determines whether there are, and judging whether to execute switching of the mobile telephone system based on the determined reception level by the wireless unit and the success rate in the determined environment.

Another aspect of the present invention that solves the above problem is a switching execution determination method for determining whether or not to switch between a plurality of mobile telephone systems mounted on a mobile phone. A storage process for updating and storing data related to the success / failure of incoming / outgoing calls corresponding to each radio wave reception level, and calculating the success rate of incoming / outgoing calls at the received radio wave reception level by statistics of the history And a switching determination step of determining whether or not to switch the mobile telephone system based on the success rate and the reception level of the received radio wave .

At this time, when the number of times of switching the base station that transmits the received radio wave is equal to or less than the predetermined number of times in a predetermined period, the number of times of switching between the stationary environment in which the mobile phone is used and the base station that transmits the radio wave to be received is predetermined. There is a mobile environment that is an environment in which a mobile phone is used when the number of times is greater than or equal to a predetermined number of times, and in the storage step, both the data related to the history in the stationary environment and the data related to the history in the mobile environment And storing the success rate in the stationary environment and the success rate in the moving environment in the calculating step, and determining whether the environment is the stationary environment or the moving environment in the switching determination step. The mobile telephone system is switched based on the success rate in the determined environment and the reception level of the received radio wave. E and judging whether to execute the.

  Another aspect of the present invention that solves the above problem relates to a switching execution determination program characterized by causing a computer to execute the switching execution determination method.

  The determination by the switching execution determination method of the present invention makes the switching of the system appropriate, and the usage situation of the mobile phone by the user is excellent.

  The best mode for carrying out the cellular phone and the like of the present invention will be described below. In the description, the drawings submitted at the same time as this specification will be appropriately referred to. The cellular phone of this embodiment is equipped with both a 3G system and a 2G system.

  FIG. 1 is a block diagram illustrating a configuration of a mobile phone according to the present embodiment. This cellular phone includes a wireless unit 100, a control unit 200, a storage unit 300, an operation unit 400, a display unit 500, and a recording medium 600.

  The wireless unit 100 is a component having an antenna that receives external radio waves. Voice data, image data, and other data related to communication can be transmitted / received to / from a wireless communication terminal such as another mobile phone via the base station. It also has a function of determining the reception level of the received radio wave. It is assumed that both 2G system and 3G system are supported.

  The control unit 200 has a function of performing central processing control, that is, centralized control of information processing in each component constituting the mobile phone. The program stored in the recording medium 600 can be controlled to be executed. It has a function of determining whether to switch systems based on the reception level of radio waves received from the wireless unit 100. It is assumed that both 2G system and 3G system are supported.

  The storage unit 300 is a component that stores telephone number data, image data, and other data related to communication. Data of success / failure of incoming / outgoing calls (hereinafter referred to as “data 310”) can be stored for a predetermined number of times for each reception level. An example of the data format of the data 310 is shown in FIG. In FIG. 2, the number of success / failure of incoming / outgoing calls is stored for the past 50 times at each reception level. Accordingly, when storing the result exceeding 50 times, the storage unit 300 deletes the oldest stored data and stores new data. In addition, the data size of each reception level is 50 bits.

  The operation unit 400 is a component having buttons for inputting numbers, alphabets, symbols, and other characters, and buttons for performing specific functions when input. The display unit 500 is a component that displays data received by the wireless unit 100 as a result of input from the operation unit 400.

  The recording medium 600 is a component that stores a program that causes the control unit 200 to execute predetermined processing. A program for executing a system switching execution determination method to be described later is also stored.

  Next, processing contents of the system switching execution determination method performed by the mobile phone of this embodiment will be described. This method is divided into “success rate storage processing” in which data related to the success rate is stored in the storage unit 300 and “system switching execution determination processing” when system switching is performed. I will explain in order.

1. "Success rate memory processing"
FIG. 3 is a flowchart showing the success rate storage processing. This will be described with reference to FIG.

  First, when the user operates the operation unit 400, outgoing or incoming calls are started (S01). The control unit 200 obtains an average value of the reception levels obtained from the radio unit 100 until the transmission or reception process is completed and the voice data is opened or the call is disconnected (S02). ). Usually, it takes about 3 to 10 seconds. The control unit 200 determines whether or not a call disconnection occurs until the voice data is opened after the process of outgoing or incoming call is completed or until the call disconnection occurs (S03).

  If it is determined in S03 that the call disconnection has not occurred (No in S03), the control unit 200 updates the data 310 corresponding to the reception level calculated in S02 as an incoming / outgoing call “success” (S04).

  When it is determined that the call disconnection has occurred in S03 (Yes in S03), the control unit 200 determines whether the reason for the call disconnection is an operation by the user of the operation unit 400 or an instruction from the network (network side). (S05).

  If the reason for disconnecting the call in S05 is a user operation or a network (network side) instruction (Yes in S05), the statistically processed data 310 is not updated (S06). When the reason for call disconnection is other than a user operation or a network (network side) instruction (No in S05), the control unit 200 updates the data 310 corresponding to the reception level calculated in S02 as an incoming / outgoing call "failure" ( S07). The success rate is stored through the above procedure.

Here, a method for updating the data 310 will be described. Assume that the data 310 is as follows. “O” means success and “x” means failure.

Reception level 6 or higher: ○○○○ ・ ・ ・ ・ ・ ○○○ (50 times)
Reception level 4 or more and less than 6: ○○ × ○ ・ ・ ・ ・ ・ ○○○ (50 times)
Reception level 2 or more and less than 4: XXXXX XX (50 times)
Reception level 0 or more and less than 2: × ○ × ○ ・ ・ ・ ・ ・ × (for 48 times)

<Example 1> The reception level obtained in S02 is "1". As a result, in the case of “failure”, the data 310 is updated as follows.

Reception level 0 or more and less than 2: × ○ × ○ ・ ・ ・ ・ ・ × (for 48 times)

→ Reception level 0 or more and less than 2 : × ○ × ○ ・ ・ ・ ・ ・ ×× (49 times)

Since the data of the corresponding reception level is less than 50 statistics, the result “x” of this time is added to the end of the data.

<Example 2> The reception level obtained in S02 is "3". As a result, in the case of “failure”, the data 310 is updated as follows.

Reception level 2 or more and less than 4: “○” × ○○ ・ ・ ・ ・ ・ ○ × ○ (50 times)

→ Reception level 2 or more and less than 4: X XXXX X X (50 times)

Since the data of the corresponding reception level is 50 statistics, the oldest result “◯” is deleted and the current result “×” is added to the end of the data.

2. "System switching execution judgment process"
FIG. 4 is a flowchart showing a system switching execution determination process. This will be described with reference to FIG.

First, the control unit 200 obtains the current reception level of each system (here, 2G system and 3G system) from the radio unit 100 (S01). The control unit 200 obtains the past success count and failure count at the corresponding reception level from the data 310 and the current reception level obtained in S01 for each system (S02). That is, “○” and “×” of the corresponding reception level are counted. The control unit 200 calculates the success rate by “success count / (success count + failure count)” for each system (S03). The control unit 200 determines whether or not the success rate for each system obtained in S03 satisfies the following equation (S04).

Success rate of active system (%) + Hyst (%) <Success rate of inactive system (%)

Here, “Hyst (%)” is a hysteresis related to a success rate for suppressing frequent switching of the system.

  If the above equation is not satisfied (No in S04), nothing is done (S06). When the above equation is satisfied (Yes in S04), the control unit 200 performs system switching so that the inactive system becomes active (S05). The system switching execution determination process is performed through the above procedure.

(Concrete example)
Assume that the incoming / outgoing call success / failure history is in the state shown in FIG. Here, Hyst (%) = 20%.

Case 1 3G reception level = 2, 2G reception level = 2 environment.
According to the method of the present embodiment, the past success rate is found to be 30% from 3G reception level = 2. From the 2G reception level = 2, the past success rate is 80%.
Since “3G success rate (30%) + Hyst (20%) <2G success rate (80%)” is satisfied, switching from a 3G system to a 2G system can be performed. In other words, if there is a system with a high success rate in an environment with a low success rate, you can move to that system.

Case 2 3G reception level = 4, 2G reception level = 6 environment.
According to the method of this embodiment, the past success rate is obtained as 100% from the reception level = 4 of 3G. From 2G reception level = 6, the past success rate is 90%.
Since “3G success rate (100%) + Hyst (20%) <2G success rate (90%)” is not satisfied, switching from the 3G system to the 2G system is not performed. In other words, when there is no problem with the success rate, system switching does not occur.

  As described above, the past success / failure times of outgoing / incoming calls are statistically determined for each reception level, and the success rate of outgoing / incoming calls is determined from that. Compared with the switching determination method using the reception level as an index, it is possible to perform system switching that matches the user's convenience (that is, the success rate). In other words, with the conventional method, even in an environment where there is a high possibility of failure in outgoing / incoming calls, the system stays in the system, or on the contrary, switching from a system that is unlikely to fail in outgoing / incoming calls occurs to a higher system. The problem does not occur with the above method.

  The above embodiment is the best mode for carrying out the mobile phone of the present invention, but is not intended to be limited to this. Therefore, various modifications can be made without departing from the scope of the present invention.

  For example, the reception level and the success rate of outgoing / incoming calls at the reception level have different trends in the stationary environment and the mobile environment. “Static environment” refers to an environment in which a user uses a mobile phone without moving too much. “Mobile environment” refers to an environment in which a mobile phone is used when a user is moving greatly in a car or the like. Therefore, the data 310 is divided into a stationary environment and a mobile environment, and in the “success rate storage process”, it is determined whether the outgoing call / incoming call is in the stationary environment or the mobile environment. If it is determined that the environment is a static environment, the data for the static environment in the data 310 is updated. If the mobile environment is determined, the mobile environment data is updated. Similarly, in the “system switching execution determination”, it is determined whether the current environment is a stationary environment or a moving environment. That is, the success rates for the stationary environment and the mobile environment are obtained, and it is determined whether or not each success rate satisfies the formula of S04 in FIG. By distinguishing the data 310 referred to in S02 of FIG. 4 for the stationary environment and the moving environment, it is possible to further improve the accuracy of system switching determination. That is, it is possible to reflect a difference in success rate tendency due to a difference in the environment of stationary / moving.

  In addition, as a method for determining whether the environment is a stationary environment or a mobile environment, for example, if the number of occurrences of the process of switching between cells (base stations) per unit time is smaller than a threshold value, “static environment”, and if larger than the threshold value, “ The method of judging as "mobile environment" is sufficient.

  In addition, the system switching index used in this embodiment is the success rate of the previous call / incoming call for each reception level, but it may be an index related to the success rate, not the success rate itself. For example, instead of the success rate, BLER (Block Error Rate) of the past control channel may be statistically determined for each reception level, and this may be used as an index for determining system switching. If the BLER is high, control information cannot be exchanged between the NW (network side) and the terminal, and there is a high possibility that a call will be made / received. On the contrary, if the BLER is low, the possibility of a failure will be low. It is.

  Further, although the “average value” of the reception level is obtained in S02 of FIG. 3 of “success rate storage processing”, the “minimum value” of the reception level at the time corresponding to the change of the average value may be used. .

  In addition, when the number of statistics at each reception level (= success number + failure number) is small, the accuracy of the success rate at each reception level may be low. Therefore, when the number of statistics is less than a certain threshold, the system switching determination according to the present invention may not be performed. In this case, the system is switched by the conventional method based on the reception level. When the number of statistics is equal to or greater than the threshold, the system switching determination according to the present invention is performed.

  Further, in the present embodiment, a mobile phone corresponding to two systems is targeted, but a mobile phone corresponding to three or more systems can be handled in the same manner.

  Further, the configuration of the mobile phone may not be as shown in FIG. For example, there may be one wireless unit 100, one control unit 200, and one storage unit 300 for each system.

It is a block diagram which shows the structure of the mobile telephone of this form. It is an example of the data format of the data 310. FIG. The success of the incoming / outgoing call is described as “◯”, and the failure of the incoming / outgoing call is described as “×”. It is a flowchart showing the memory | storage process of a success rate. It is a flowchart showing a system switching execution determination process. It is a figure showing the relationship between the magnitude | size of the reception level, such as a common channel in each system of 3G and 2G which concerns on a mobile telephone, and the success rate in the past transmission and reception in the reception level.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Radio | wireless part 200 Control part 300 Memory | storage part 310 Data 400 Operation part 500 Display part 600 Recording medium

Claims (6)

  1. A radio unit for receiving radio waves and determining a reception level of the radio waves;
    It has a control part that controls the information processing in each part centrally,
    In a mobile phone that supports a plurality of mobile phone systems and performs switching of the mobile phone system under the control of the control unit,
    In each mobile phone system, there is a history regarding the success or failure of incoming and outgoing calls corresponding to each of the reception levels,
    The control unit determines success or failure of incoming and outgoing calls, calculates the success rate of incoming and outgoing calls by statistics of the history, and based on the success rate and the reception level determined by the wireless unit , A mobile phone characterized by determining whether or not to perform switching.
  2. A storage unit for storing data relating to the history;
    2. The mobile phone according to claim 1, wherein when the control unit determines whether the incoming / outgoing call is successful or not, data related to the history is updated in the storage unit.
  3. A stationary environment that is an environment in which a mobile phone is used when the number of times of switching base stations that transmit radio waves received by the wireless unit is a predetermined number or less during a predetermined period;
    There is a mobile environment that is an environment in which a mobile phone is used when the number of times of switching base stations that transmit radio waves received by the wireless unit is a predetermined number or more in a predetermined period,
    Before SL storage unit stores both data relating to the history of data and the mobile environment according to the history of the stationary environment,
    The control unit performs both determination of success / failure of an incoming / outgoing call in the stationary environment and determination of success / failure of an incoming / outgoing call in the mobile environment, and statistically records the history so that the success rate of incoming / outgoing calls in the stationary environment and the movement Calculate the success rate of incoming and outgoing calls in the environment, determine whether the environment is the stationary environment or the mobile environment, and based on the success rate in the determined environment and the reception level determined by the radio unit The mobile phone according to claim 2, wherein it is determined whether or not to switch the mobile telephone system .
  4. In the switching execution determination method for determining whether to perform switching of a plurality of mobile phone systems mounted on a mobile phone,
    In each mobile phone system, a storage step of updating and storing data relating to the history of success / failure of incoming / outgoing calls corresponding to each reception level of received radio waves,
    By calculating the history, a calculation step of calculating a success rate of incoming and outgoing calls at the reception level of the received radio waves,
    A switching execution determination method comprising: a switching determination step for determining whether or not to switch the mobile telephone system based on the success rate and the reception level of the received radio wave .
  5. A stationary environment that is an environment in which a mobile phone is used when the number of times of switching base stations that transmit received radio waves is less than or equal to a predetermined number in a predetermined period;
    There is a mobile environment in which the mobile phone is used when the number of times to switch the base station that transmits the received radio waves is greater than or equal to a predetermined number in a predetermined period,
    In the storing step, storing both the data related to the history in the stationary environment and the data related to the history in the mobile environment,
    In the calculating step, calculating the success rate in the stationary environment and the success rate in the mobile environment ,
    In the switching determination step, it is determined whether the environment is the stationary environment or the mobile environment, and the switching of the mobile telephone system is performed based on the success rate and the reception level of the received radio wave in the determined environment. The switching execution determination method according to claim 4, wherein it is determined whether or not to execute .
  6. On the computer,
    Switching execution determination program characterized by executing the switching execution determination method according to claim 4 or 5.
JP2005006164A 2005-01-13 2005-01-13 Mobile phone, switching execution determination method, switching execution determination program Expired - Fee Related JP4320416B2 (en)

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CN102271345A (en) * 2010-06-01 2011-12-07 中兴通讯股份有限公司 Statistical method and device for relevant information of network resident user
JP5899815B2 (en) * 2011-11-02 2016-04-06 株式会社バッファロー Portable network communication device, method for selecting use network interface, computer program, and computer-readable recording medium
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