JP6274824B2 - Wireless mobile station equipment - Google Patents

Description

  The present invention relates to a radio mobile station apparatus in a radio communication system, and more particularly to selection of a base station apparatus of a radio mobile station apparatus.

A conventional radio mobile station apparatus will be described with reference to FIGS.
FIG. 6 is a diagram for explaining a configuration example of a radio communication system including a general radio mobile station apparatus.
The wireless communication system in FIG. 6 includes a wireless mobile station apparatus 601 (hereinafter referred to as a mobile station), a base station apparatus 102 (hereinafter referred to as a base station), an exchange station 103, and a public network 104. The mobile station 601 performs communication such as voice and packet data with the base station 102 using radio waves as a medium. In this example, the base station 102 constantly transmits to the mobile station 601 broadcast information including information such as which operator the base station 102 belongs to using one of a plurality of frequencies. Yes.

FIG. 7 is a block diagram for explaining a conventional radio mobile station apparatus.
The mobile station 601 in FIG. 7 communicates with the base station 102 using voices, packet data, and the like using radio waves as a medium.
The radio wave transmitted from the base station 102 is received by the wireless transmission / reception unit 201 and converted into a signal by the baseband processing unit 202. The converted signal data is sent to an application (AP) unit 211 and a call processing control unit 212 of the main control unit 710, and a display unit 205 such as an LCD (Liquid Crystal Display) and an audio output unit such as a speaker according to the attributes. 206. Data input from a voice input unit 207 such as a microphone and another input unit 208 such as a numeric keypad is an AP unit 211,
The signal is converted by the call processing control unit 212, converted by the baseband processing unit 202, and transmitted to the base station 102 as a radio wave by the wireless transmission / reception unit 201. When the mobile station 601 receives various control signals, after being processed in the AP unit 211 and the call processing control unit 212, the baseband processing unit 202, wireless communication is not performed via the display device 205 to the other input device 208. In some cases, the data is transmitted to the base station 102 via the transmission / reception unit 201.

FIG. 8 is a diagram for explaining an operation in which a conventional radio mobile station apparatus captures a distant base station.
A basic part of a base station selection criterion in a general wireless communication system is defined as a specification of the wireless communication system, but is not a definition covering all situations. In the case of wireless communication, a situation change around the mobile station due to an external factor can always occur in the system, and the situation is different in each case. Therefore, it is very difficult to establish a specification considering all situations. For this reason, the mobile station may actually select a base station that is not capable of bidirectional communication.

For example, since the mobile station 601 has good conditions such as the absence of an obstacle between the base station and not the adjacent base stations 803 and 804, the broadcast information can be received farther than expected. There is a case where a station selects a distant base station 805 as a communication destination base station (hereinafter referred to as far base station acquisition). In this case, even if the mobile station 601 actually attempts to communicate with the base station 805, communication is not possible because the distance is long. In particular, if the frequency of the radio wave that transmits the notification information is low, the probability that this event will occur increases because the notification information is difficult to attenuate due to its characteristics.
Further, for example, even when neighboring base stations 803 and 804 are selected, there are cases where communication is impossible due to the influence of obstacles 802 and 806, interference waves, etc., even if communication is actually performed.
The communication range between the base station 803 and the mobile station is 813, the communication range between the base station 804 and the mobile station is 814, and the communication range between the base station 805 and the mobile station is 815.

  In addition, as another prior art, in order to provide a wireless mobile station device that can select a base station device that can stably perform communication, the wireless mobile station device is a signal that is wirelessly communicated with the base station device. A wireless transmission / reception unit that transmits / receives data, a reception strength determination unit that determines whether the reception strength of the reception signal received by the wireless transmission / reception unit is equal to or higher than a reference value, and whether the reception quality of the reception signal is higher than a reference value A reception quality determination unit that determines whether or not the number of communication failures that have occurred between the base station apparatus exceeds a predetermined threshold, a determination of reception strength, and a reception quality And a base station selection unit that sets the priority order of base station selection based on whether or not the number of communication failures exceeds a predetermined threshold (see, for example, Patent Document 1).

JP 2012-49877 A

  An object of the present invention is to enable reselection of another communicable base station apparatus even when the radio mobile station apparatus selects a base station apparatus that can receive broadcast information but cannot communicate.

  The radio mobile station apparatus of the present invention includes a radio transmission / reception unit that transmits and receives a signal wirelessly communicated with the base station apparatus, a transmission from the radio transmission / reception unit to the base station apparatus, and a response from the base station apparatus A time counting unit that counts time, a retry counting unit that retransmits from the wireless transmission / reception unit when the time counting unit does not respond from the base station device within a predetermined time, and a retry counting unit that counts the number of times of retransmission And a base station selection unit having a function of removing a base station device from a selection target for a predetermined time when a predetermined number of times is exceeded.

  The radio mobile station apparatus of the present invention is the above-described radio mobile station apparatus, wherein the base station selection unit can set whether to enable or disable the function of excluding a base station apparatus whose number of retries exceeds a predetermined number from selection targets. Features.

  The wireless mobile station apparatus communication method of the present invention includes a transmission step of transmitting to the base station apparatus, a time counting step of counting the time until the base station apparatus responds, and no response from the base station apparatus within a predetermined time. And a retry counting step for counting the number of retransmissions, and a base station device selection excluding step for excluding a base station device that has been retransmitted over a predetermined number of times from being selected. And

  A radio mobile station apparatus communication method according to the present invention is the above-described radio mobile station apparatus communication method, comprising a base station apparatus selection exclusion setting step for setting validity or invalidity of a base station apparatus selection exclusion step. And

  ADVANTAGE OF THE INVENTION According to this invention, even when a radio | wireless mobile station apparatus selects the base station apparatus which can receive alerting | reporting information and cannot communicate, it can reselect the other base station apparatus which can communicate.

It is a figure for demonstrating the radio | wireless communications system structure containing the radio | wireless mobile station apparatus which is one Example of this invention. It is a block diagram for demonstrating the radio | wireless mobile station apparatus which is one Example of this invention. It is a figure for demonstrating the operation | movement of the base station reselection at the time of the radio | wireless mobile station apparatus which is one Example of this invention catching a distant base station. It is a flowchart for demonstrating operation | movement of the radio | wireless mobile station apparatus which is one Example of this invention. It is a figure for demonstrating the use prohibition table memorize | stored in the radio | wireless mobile station apparatus which is one Example of this invention. It is a figure for demonstrating the structural example of the radio | wireless communications system containing a radio | wireless mobile station apparatus. It is a block diagram for demonstrating the conventional radio | wireless mobile station apparatus. It is a figure for demonstrating the operation | movement in which the conventional radio | wireless mobile station apparatus captures a distant base station.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram for explaining a system configuration including a wireless mobile station apparatus according to an embodiment of the present invention.
In FIG. 1, a radio communication system according to this embodiment includes a radio mobile station apparatus 101 (hereinafter referred to as a mobile station), a base station apparatus 102 (hereinafter referred to as a base station), an exchange 103, The mobile station 101 is configured by a network 104 and performs communication such as voice and packet data with the base station 102 using radio waves as a medium. In this example, the base station 102 constantly transmits to the mobile station 101 broadcast information including information such as which operator the base station 102 belongs to using one of a plurality of frequencies. Yes.

FIG. 2 is a block diagram for explaining a radio mobile station apparatus according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating a configuration example of a radio mobile station apparatus according to the present invention.
The mobile station 101 in this example is a mobile station in a mobile communication system, and includes a radio transmission / reception unit 201, a baseband signal processing unit 202, a main control unit 210, a storage unit 220, a display device 205, and voice input. A device 206, an audio output device 207, and another input device 208 are provided.
A wireless communication module for the mobile station 101 to be installed in another electronic device or the like for the main purpose of data communication and to communicate with the electronic device and a network side device (not shown) connected to the public network. The display device 205, the audio input device 206, the audio output device 207, and the other input device 208 are not necessarily required, and may be only an interface with an installed electronic device or the like. The display device 205, the voice input device 206, the voice output device 207, and the other input device 208 may be provided in an electronic device or the like.

  The main control unit 210 includes, as functions, an application unit (AP unit) 211, a call processing control unit (call control unit) 212, a time counting unit 213, a retry counting unit 214, and a base station selection unit 215. The hardware configuration includes a CPU and a memory. Further, the main control unit 210 performs overall control of the wireless transmission / reception unit 201, the baseband signal processing unit 202, the display device 205, the audio input device 206, the audio output device 207, and the other input device 208.

  The wireless transmission / reception unit 201 transmits / receives a signal wirelessly communicated between the base station 102 and the mobile station 101, and performs band conversion between a radio frequency band signal and a baseband signal. The baseband signal processing unit 202 is a baseband transmission process for transmitting data to the base station via the wireless transmission / reception unit 201 of the baseband reception processing of the signal converted into the baseband band by the wireless transmission / reception unit 201, wireless The reception signal received by the transmission / reception unit 201 is processed.

  The display device 205 includes an LCD or the like, and displays received data, input data, and the like. The voice input device 206 is composed of a microphone or the like and accepts input of voice or the like. The audio output device 207 is configured by a speaker or the like, and outputs a received audio signal or the like as sound. The other input device 208 is composed of a key including a numeric keypad and receives a key input or the like.

The application unit 211 performs data transmission / reception processing associated with a communication application executed by the mobile station 101.
The call processing control unit 212 controls call processing of the mobile station 101, and outputs the received signal data baseband processed by the baseband signal processing unit 202 to the voice output device 207 or the voice input device 206. The baseband signal processing unit 202 performs baseband processing on the audio data input from, and transmits it via the wireless transmission / reception unit 201.

  The time counting unit 213 transmits a transmission signal (hereinafter referred to as A-req) from the wireless transmission / reception unit 201 to the base station 102, and receives a response signal (hereinafter referred to as A-cnf) returned from the base station 102. Count the time to complete.

  The retry counter 214 retransmits from the wireless transceiver 201 when the time counter 213 does not reply A-cnf from the base station 102 within a predetermined time, for example, within 60 seconds, and counts the number of retransmissions.

  When the base station 102 is selected, the base station selection unit 215 keeps the corresponding base station 102 for a predetermined time (for example, 10 times in advance) when the retry counting unit 214 exceeds the predetermined number (for example, 5 is set in advance). (Set minutes) has a function to remove from the selection target. Note that the base station selection unit 215 can set whether the function is valid or invalid.

  The storage unit 220 includes a table storage unit 221, a frequency storage unit 222, and a base station state storage unit 223. An example of the table stored in the table storage unit 221 is shown in FIG. 5 and will be described in detail later.

The frequency storage unit 222 stores a communication frequency used for communication with the base station 102. The communication frequency used for communication is, for example, 212.8 MHz, 2137.6 MHz, or the like.
The base station state storage unit 223 stores the counting results of the time counting unit 213 and the retry counting unit 215 for each base station.

Next, the base station reselection operation when the radio mobile station apparatus captures the remote base station will be described with reference to FIG.
FIG. 3 is a diagram for explaining an operation of reselecting a base station when a radio mobile station apparatus according to an embodiment of the present invention acquires a remote base station.
The mobile station receives broadcast information from the base station, transmits A-req to the base station based on the received broadcast information, and starts communication after receiving A-cnf returned from the base station. However, since the transmission range of the mobile station is generally narrower than the transmission range of the base station, even if the mobile station can receive the broadcast information transmitted from the base station, the transmission radio wave of the mobile station is transmitted to the remote base station. It may not arrive. This state is when the mobile station captures the far base station.
One embodiment of the present invention is an operation for a mobile station to reselect another base station when a remote base station is acquired.

In FIG. 3, the mobile station 101 determines whether or not acquisition of a distant base station 304 has occurred based on the “A-req retransmission count”. The call processing control unit 212 of the mobile station 101 cannot receive the A-cnf (C314-2) within a predetermined time (for example, within 60 seconds) after transmitting the A-req (C314-1) from the mobile station 101. When the situation is detected, A-req (C314-1) is retransmitted to the base station.
The call processing control unit 212 cannot receive the A-cnf (C314-2) even if the number of retransmissions of the A-req (C314-1) exceeds a predetermined number (for example, 5 times) as the “A-req retransmission number”. In this case, the mobile station 101 determines that the far base station acquisition has occurred. When the mobile station 101 receives A-cnf (C314-2), bidirectional communication is possible, and the remote base station is not captured.

When the mobile station 101 determines that the base station 304 is in the far base station capture state, the frequency used at the time of A-req transmission or the combination of the far base station or the far base station and the used frequency is determined for a predetermined period within the mobile station. Use prohibited (for example, for 10 minutes).
As a result, the mobile station 101 temporarily cannot use the frequency that has failed in communication with the base station 304, and thus searches for another frequency or base station. If another base station exists in the vicinity, the base station The station can be detected.

Next, the mobile station 101 transmits A-req (C313-1) to another base station 303 that has received the broadcast information, and then transmits A-cnf (C313-2) within a predetermined time (for example, within 60 seconds). Is detected, the A-req (C313-1) is retransmitted to the base station.
The call processing control unit 212 cannot receive the A-cnf (C313-2) even if the number of retransmissions of the A-req (C313-1) exceeds a predetermined number (for example, 5 times) as the “A-req retransmission number”. In this case, the mobile station 101 determines that the remote base station acquisition has occurred, and prohibits the base station 303 from acquiring the base station or using the frequency for a predetermined time (for example, 10 minutes).
Further, the mobile station 101 transmits A-cnf (C312-2) within a predetermined time (for example, within 60 seconds) after transmitting A-req (C312-1) to another base station 302 that has received the broadcast information. If received, start communication.

The frequency used when the mobile station 101 determines that the remote base station has been captured or the time during which the mobile station prohibits the use of the base station is determined in advance as a fixed value. Alternatively, the user can change the use prohibition time and set a use prohibition time suitable for the operation status of the mobile station.
The frequency of the mobile station 101 or the use prohibition time of the base station is controlled by a timer (not shown) inside the mobile station, and can be used after a predetermined time has elapsed. This is because even if the base station exists at a distant place when use is prohibited, it is necessary to take into account the case where the mobile station moves or two-way communication with the prohibited base station becomes possible due to changes in surrounding conditions. It is. In addition, this timer can manage a prohibited frequency or a usable / unusable state for each base station. This is because it is possible to prohibit the use of a plurality of frequencies.
In order to implement one embodiment of the present invention, the mobile station manages information that is currently prohibited from use in the mobile station using a management table (hereinafter referred to as a use prohibition table).
Information to be managed includes frequency information to be prohibited from use, base station information to be prohibited from use, information related to a timer for managing the prohibited time, and the like.

Next, the detailed operation of one embodiment of the present invention will be described with reference to FIGS.
FIG. 4 is a flowchart for explaining the operation of the radio mobile station apparatus according to the embodiment of the present invention.
The mobile station 101 receives broadcast information of the base station 304, for example, as base station selection processing for communicating with the base station (S401).
The mobile station 101 extracts the frequency α used and the individual base station identification number 304 from the received broadcast information of the base station 304 (S402).

  The mobile station 101 determines whether or not there is a list including only the frequency α in the use prohibition table stored in the table storage unit 221 (S403). If there is a list including only the frequency α (YES), the process proceeds to S407. The process proceeds to the process of S404 if there is no list including only the frequency α (NO).

  The mobile station 101 determines whether or not there is a list including only the individual base station identification number 304 in the use prohibition table stored in the table storage unit 221 (S404), and there is a list including only the individual base station identification number 304. If yes (YES), the process proceeds to S407. If there is no list including only the individual base station identification number 304 (NO), the process proceeds to S405.

  The mobile station 101 determines whether or not there is a list including both the frequency α and the individual base station identification number 304 in the use prohibition table stored in the table storage unit 221 (S405), and the frequency α and the individual base station identification number. When there is a list including only 304 (YES), the process proceeds to S407, and when there is no list including only the frequency α and the individual base station identification number 304 (NO), the process proceeds to S406.

The mobile station 101 determines that bidirectional communication can be started with the base station having the individual base station identification number 304 in the process of S406.
Also, the mobile station 101 proceeds to another base station selection process in step S407.

Next, a use prohibition table according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 5 is a diagram for explaining a use prohibition table stored in a radio mobile station apparatus according to an embodiment of the present invention.
The mobile station 101 in FIG. 3 determines that the base station 304 has captured the far base station, forbids the frequency, and selects another base station 303, but the base station 303 is also in the far base station capture state, The case of selecting another base station 302 will be described using the use prohibition table of FIG.

  In one embodiment of the present invention, the frequency used by the base station 304 is α, and the frequency used by the base station base station 303 is β. When the base station 303 is selected, but it is determined that the base station 303 also captures a distant base station, it is necessary to prohibit the frequency of the propagation wave used for communication between the base stations 304 and 303 for a predetermined time.

The mobile station 101 stores in the use prohibition table the frequency α determined to be the remote base station acquisition and the base station 304. Thereafter, a timer for measuring the use prohibition time is started, and related timer information (Tα) that can identify the active timer is stored in the use prohibition table. This use prohibition table is shown in FIG.
The mobile station 101 does not use the frequency or base station stored as information in the use prohibition table for various communications.

When the mobile station 101 selects the base station 303 and, as a result, determines that the remote base station is captured, the frequency prohibition table uses the frequency information β, the base station information 303, and the related timer information Tβ in the same manner as when the base station 304 is selected. And start a timer that manages the time for which use is prohibited. This use prohibition table is shown in FIG.
Then, the mobile station 101 searches for selectable base stations that are not stored in the use prohibition table.

Next, an example when the use prohibition time expires will be described.
When the use prohibition time expires while the frequency α and the base station 304 are in the use prohibition state, the mobile station 101 ends the measurement of the timer that has been measuring the use prohibition time.
The mobile station 101 identifies from the related timer information in the use prohibition table which frequency information the timer that has finished measuring has been prohibited from use, and the frequency information α, the base station 304 information, and the related timer information from the use prohibition table. delete. FIG. 5C shows this use prohibition table.
Through these processes, the frequency α or the base station 304 can be used again by the mobile station 101.

When the mobile station 101 stores both the frequency information and the individual base station identification information in the use prohibition table, the mobile station 101 manages whether to prohibit the use with the combination of the frequency information and the individual base station identification information as one unit.
When the management status becomes the status shown in FIG. 5D, the mobile station 101 prohibits the base station 304 from attempting bi-directional communication using the frequency α. When the base station 304 using β is selected, bidirectional communication can be attempted.

  Also, the mobile station 101 can manage different remote base station acquisition states by storing and managing only individual base station identification information without storing frequency information in the use prohibition table. When the management status becomes the status shown in FIG. 5E, the mobile station 101 prohibits the base station 304, 303 from attempting bi-directional communication, specifying the frequency information.

  Further, the mobile station 101 does not store the individual base station identification information in the use prohibition table, but stores and manages only the frequency information, so that the same remote base station as in FIGS. 5 (A) to 5 (C) The capture state can also be managed. When the management status becomes the status shown in FIG. 5F in Table 6, the mobile station 101 specifies the base station and prohibits the use of the frequency only for the bidirectional communication.

As an embodiment of the present invention, a function is provided that allows the user to select whether to enable or disable the function of reselecting the base station.
An example of invalidating the function of reselecting the base station of the present invention is shown below.
When the user selects invalidation of the above-described function of reselecting the base station, “A-req retransmission count” is invalidated or changed to the retransmission count based on a known specification. In addition, if the A-cnf cannot be received by the call processing control unit even if the predetermined number of times is exceeded by the “A-req retransmission count”, the frequency information and the related timer information are not stored in the use prohibition table, and the prohibition time measurement The timer does not start. By performing these controls in the mobile station 101, no information is stored in the use prohibition table, so that the function of reselecting the base station can be invalidated.

  According to the above-described embodiment, even when the radio mobile station apparatus selects a base station apparatus that can receive broadcast information but cannot communicate, it can reselect another base station apparatus that can communicate.

  Although the present invention has been described in detail above, it is needless to say that the present invention is not limited to the radio mobile station apparatus described herein, and can be widely applied to radio mobile station apparatuses other than those described above.

  101: wireless mobile station device, 102: base station device, 103: switching center, 104: public network, 201: wireless transmission / reception unit, 202: baseband signal processing unit, 210: main control unit, 211: AP unit, 212: Call processing control unit, 205: display device, 206: voice input device, 207: voice output device, 208: other input device, 220: storage unit.

Claims (2)

A wireless transmission / reception unit for transmitting / receiving a signal wirelessly communicated with the base station device;
When transmission is performed from the radio transmission / reception unit to the base station apparatus based on the broadcast information received from the base station apparatus, the time until the response to the transmitted signal is made from the base station apparatus is counted. A time counting unit;
The number of retransmissions that are retransmitted from the radio transceiver unit to the base station device when no response is made from the base station device to the transmitted signal within a predetermined time counted by the time counting unit A retry counting unit for counting
If the number of retransmissions the retry count unit counts exceeds a predetermined number, and a base station selecting unit having a function of the frequency used for communication with the base station apparatus to a predetermined time disabled ,
Further, the base station selection unit sets the validity or invalidity of a function for prohibiting the use of a frequency used for communication with a base station apparatus whose number of retries exceeds a predetermined number of times, and prohibits the use. A radio mobile station apparatus characterized in that time can be set by a user . A transmission step of transmitting to the base station device based on the broadcast information received from the base station device;
A time counting step of counting a time until a response to the transmitted signal is made from the base station device;
A retry counting step of retransmitting to the base station device when a reply is not made from the base station device within a predetermined time, and counting the number of retransmissions;
A base station apparatus selection excluding step for prohibiting the use of a frequency used for communication with a base station apparatus whose number of retransmissions exceeds a predetermined number of times, and
Have
The wireless mobile station apparatus communication method further comprises a base station apparatus selection exclusion setting step for setting validity or invalidity of the base station apparatus selection exclusion step and setting a time during which the use is prohibited.

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