JP2910980B2 - Mobile station communication channel control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a communication channel in a mobile communication such as a mobile phone or a mobile phone while the mobile station is communicating via a base station through the communication channel.

[0002]

2. Description of the Related Art In a mobile communication system, while a mobile station is using a communication channel, a bit error rate high enough to affect communication in a wireless section is continuously detected due to deterioration of a reception level or the like. No conventional processing has been performed. For this reason, the unrecognizable voice is continuously heard or silenced during reception demodulation, giving the user discomfort.

[0003]

As described above, even if the bit error rate is detected continuously, it does not cause much discomfort to the user and the use of a useless communication channel that is not suitable for use. An object of the present invention is to provide a communication channel control method for a mobile station, which can reduce the number of radio channels and effectively use the radio channel frequency.

[0004]

According to the first aspect of the present invention, a mobile station measures a bit error rate of a received signal of an in-use communication channel from a base station and determines that a bit error rate equal to or higher than a prescribed value is continuously determined a predetermined number of times. If detected, an alarm is generated to notify the user.If the bit error rate below the specified value is continuously detected a predetermined number of times while the alarm is being generated, the alarm is stopped and the alarm is output. When a bit error rate equal to or greater than a specified value is detected continuously for a predetermined number of times in a generated state, the communication channel in use is forcibly disconnected.

[0005] In the invention of claim 2, the invention of claim 1 and
Measuring the bit error rate, generating an alarm, and stopping the alarm when the bit error rate is equal to or less than a specified value are the same. Then, the communication channel in use is forcibly disconnected. According to the invention of claim 3, the base station measures the bit error rate of the received signal of the busy communication channel from the mobile station, and reports the measurement result to the mobile station. When the error rate is equal to or higher than the specified value continuously for a predetermined number of times, an alarm is issued to notify the user of the error, and the bit error rate reported with the alarm generated is equal to or lower than the specified value. When the number of consecutive times reaches the predetermined number, the alarm is stopped, and when the bit error rate reported in the state where the alarm has occurred is equal to or more than the specified value continuously reaches the predetermined number of times, the communication channel in use is switched off. Disconnect forcibly.

The fourth aspect of the present invention is the same as the third aspect of the invention except that the communication channel in use is forcibly disconnected when a predetermined time has elapsed while an alarm is being generated.

[0007]

FIG. 1 shows an embodiment of the present invention. When communication via the base station through the communication channel is started in the mobile station, n1 = 0 is first initialized (S ₁ ), and measurement of the bit error rate of the signal received from the base station on the communication channel in use is started. (S ₂ ), it is checked whether or not the measurement result of the bit error rate is obtained (S ₃ ). When the measurement result is obtained, an alarm for notifying the user that the transmission quality is in a bad state, in the example checks whether the state notification sound is generated (S _4). If the notification sound is not generated, it is checked whether the measured bit error rate _Er is equal to or greater than a specified value T ₁ , for example, 3% (S ₅ ).
Is incremented by 1 (S ₆ ), and n1 is set to 0 if not greater than the specified value (S ₇ ).

[0008] Then n1 is examined whether greater than a predetermined value N1 (S _8), is greater than N1, if N1 times specified value above T ₁ bit error rate E _r of words was measured continuously,
Alarm for notifying that the transmission quality is degraded, for example, the notification sound generated (S _9), and zero both n2 and n3 returns to step S ₃ (S _10). Step S ₈ in N1
Immediately returns to the step S ₃ if there is no more significant.

[0009] states that notification sound sounded in step S _4, i.e. when it is notified that the state transmission quality is bad, the measured bit error rate E _r is the specified value T ₁
Determine or (S _11), and the n2 if above T ₁ zero (S _12), further n3 +1 Mr (S _13), checks whether the n3 is greater than a predetermined value N3 (S _14), n3 returns to the step S ₃ if it is not greater than N3. If n3 is greater than N3, that is, when it is to the N3 or more continuous bit error rate E _r in a state where the notification sound is ringing is specified value above T _1, transmission quality thus bad situation in forcibly disconnects the communication channel to continue communication using currently determined difficult (S _15).

[0010] In step S _11, the bit error rate E _r
If not but larger than the predetermined value T _1, the n3 zero (S _16), the n2 +1 Mr (S _17), the n2 is the predetermined value N
2 or whether the examined (S _18), the flow returns to step S ₃ unless N2 or more. If N2 or more, the notification sound is stopped (S
_19), the flow returns to step S ₃ of n1 to zero. That is, if n2 is equal to or greater than N2, it is determined that the transmission quality has become sufficiently good, and n1 is set to zero, and the process returns to step S3.

For example, N1 is 2-3, N2 is 2-3, N
3 is about 10. As described above, if the transmission quality deteriorates, this is notified to the user of the mobile station by sound, light, vibration, or the like.If the transmission quality improves in this state, the notification is stopped, and the transmission quality is notified during the notification. If the condition continues, the communication channel is disconnected, and the communication channel is made available to other mobile stations effectively.

FIG. 2 shows an embodiment of the second aspect of the present invention. Steps corresponding to those in FIG. 1 are denoted by the same reference numerals. In this embodiment, when the measurement of the bit error rate is started (S ₂ ), first, the timer is completed, that is, it is checked whether or not a timeout has occurred (S ₂₁ ). Thereafter, the flow returns to step S ₃ to obtain the measurement result of the bit error rate. A check is made to see if it has been done. Step S ₈ in n1 is determined to be greater than N1, as in the previous embodiment sounding notification sound (S ₉₎ is, Other starts a timer (S _22). Also the only step S ₁₀ the n2 to zero, in step S ₃ no, the process returns to step S _21. If the step S ₈ in n1 is not greater than N1 also returns to step S _21.

[0013] Bit error rate E _r at step S ₁₁ it is determined a specified value above T _1, after the n2 to zero (S _12), the procedure proceeds to step S _18, step S _13, S in FIG. 1 ₁₄ is omitted. The E _r is T in step S ₁₁
If not greater is determined from ₁ n2 to shift from the +1 to step S _18, step S ₁₆ is omitted. Further, when n2 in step S ₁₈ is determined to be equal to or greater than N2, it stops the notification sound, to stop and reset the timer (S
_23), the flow returns to step S ₂₁ to n1 as zero (S _21).
Step may n2 is determined not to be equal to or greater than N2 S ₂₁
Return to The step S ₂₁ in timer forcibly disconnects the communication channel in use and it is determined that the time-out (S _15).

That is, in the embodiment shown in FIG. 2, the communication channel is disconnected when a predetermined time elapses while the transmission quality is degraded, that is, while the notification sound is sounding. If it is determined that the transmission quality has returned to a good state during this predetermined time (n2> N2), the timer is reset. Therefore, in the embodiment of FIG.
Even in a state where time transmission quality degrades (notice sound generating state), the specified value above T ₁ bit error rate E _r is continuously N3
And the prescribed value T _{1 of the} error rate _Er.
Without becomes more than N2 times in succession below, or become the bit error rate E _r is the specified value above T _1, when it is repeated to or become T ₁ below, but continues communication,
In the embodiment of FIG. 2, the state in which the bit error rate E _r at occurrence of the notification sound that may become hereinafter may become a specified value above T ₁ are repeated becomes timer time, forcibly communication channel Disconnect.

FIG. 3 shows an embodiment of the third aspect of the present invention.
Steps corresponding to 1 are given the same symbols. This fruit
In the embodiment, the bit error of the communication channel from the mobile station during communication.
Rate E _rMeasurement at the base station, and the base station measures the bit error rate.
Measurement result E_rIs obtained each time the bit error rate E_rTo
Report to mobile station. Therefore, communication is started at the mobile station.
And after initializing n1, the bit error rate E from the base station is
_rWait for report (S₃₁), The bit error rate E from the base station_r
Is received, step S in FIG._FourMove on to Toes
Instead of measuring the bit error rate in FIG.
The other bit error rates in FIG.
Perform processing. Therefore, step S₈, S_Ten, S₁₈, S₂₀,
S₁₄To step S_ThreeWhen returning to step S3 in FIG.
₃₁Return to

FIG. 4 shows an embodiment of the fourth aspect of the present invention, in which steps corresponding to those in FIG. In this case, the mobile station receives a report of the result of measuring the bit error rate at the base station, and performs the processing shown in FIG. 2 on the received bit error rate _Er . only in that the result is the step S ₃₁ to wait for a report of a bit error rate E _r from the base station instead of the step S ₃ to wait for the obtained is used is different from FIG.

The transmission state may be different between the uplink (the line from the mobile station to the base station) and the downlink (the line from the base station to the mobile station) in the communication channel. Any one of the communication channel control methods shown in FIG.
And the communication channel control method shown in FIG. 4 may be used together. In this case, processing based on the bit error rate measured by the mobile station, processing based on the bit error rate reported from the base station When an alarm generation request is issued at any of the above, an alarm is generated, and when a forced disconnection request is generated at any of the above, the communication channel is forcibly disconnected according to the request. However, the alarm is stopped when a stop request is issued from both parties. Also in the embodiments shown in FIGS. 2 to 4, the notification of the state in which the transmission quality has deteriorated is not limited to the case of sound, but may be light or vibration.

[0018]

As described above, according to the present invention, when the transmission quality is degraded by using the bit error rate constantly measured by the mobile station or the base station while the communication channel is being used, an alarm is issued. To notify the user and warn,
When the bit error rate has been detected to be equal to or less than the specified value continuously for a predetermined number of times in a state in which this alarm is generated, the alarm is stopped and the user is notified that the transmission state has been improved. When the notification is made and the bit error rate becomes equal to or less than the specified value continuously or more than a predetermined number of times or when a predetermined time elapses in the alarm occurrence state, it is determined that the communication cannot be continued, and the communication channel in use is disconnected. Therefore, unrecognizable voices are not continuously heard, intermittently generated for a long time, silence continues, intermittently generated for a long time, or a state that causes discomfort to the user is not continued for a long time, and Such a useless communication channel, which is substantially difficult to continue communication, can be disconnected and released to be used for other users, and the communication channel is effectively used, that is, the frequency is effectively used. It can also be said. Also, when the communication channel is forcibly disconnected, the user can understand the cause of the disconnection because the alarm was present until then.

[Brief description of the drawings]

FIG. 1 is a flowchart showing an embodiment of the invention of claim 1;

FIG. 2 is a flowchart showing an embodiment of the invention of claim 2;

FIG. 3 is a flowchart showing an embodiment of the invention of claim 3;

FIG. 4 is a flowchart showing an embodiment of the invention of claim 4;

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kazumi Yuki 2-10-1 Toranomon, Minato-ku, Tokyo Inside NTT Mobile Communication Network Co., Ltd. (56) References JP-A-1-160123 (JP) , A) JP-A-60-182228 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04B 7/26-7/26 113 H04Q 7/04-7/38

Claims (4)

(57) [Claims] A mobile station measures a bit error rate of a received signal of the communication channel from the base station during communication through the base station using the communication channel, and a bit error rate equal to or greater than a specified value is continuously measured. If the bit error rate equal to or less than the specified value is continuously detected a predetermined number of times while the alarm is being generated, the alarm is stopped. The communication channel control of the mobile station, wherein the communication channel is forcibly disconnected when a bit error rate equal to or more than the specified value is continuously detected a predetermined number of times while the alarm is being generated. Method. 2. A mobile station measures a bit error rate of a signal received from the base station during communication through the base station using a communication channel, and detects a bit error rate equal to or higher than a specified value continuously for a predetermined number of times. Then, an alarm notifying the occurrence is generated, and when the bit error rate equal to or less than the specified value is continuously detected a predetermined number of times while the alarm is generated, the alarm is stopped, and the alarm is stopped. A communication channel control method for a mobile station, characterized in that the communication channel is forcibly disconnected after a certain period of time has elapsed. 3. During communication through a base station using a communication channel, the base station measures a bit error rate of a signal received on the communication channel, and compares the measurement result with a mobile station using the communication channel. When the bit error rate reported by the mobile station is equal to or greater than a specified value continuously for a predetermined number of times, an alarm notifying that is generated, and in a state where the alarm is generated When the reported bit error rate is continuously equal to or less than the specified value for a predetermined number of times, the alarm is stopped, and in a state where the alarm is generated, the reported bit error rate is equal to or less than the specified value. A communication channel control method for a mobile station, characterized in that the communication channel is forcibly disconnected when a predetermined number of times is equal to or more than the value. 4. During communication through a base station using a communication channel, the base station measures a bit error rate of a signal received on the communication channel, and sends the measurement result to a mobile station using the communication channel. When the reported bit error rate is equal to or greater than a specified value continuously at a predetermined number of times at the mobile station, an alarm notifying that is generated, and the alarm is generated in the state where the alarm is generated. When the reported bit error rate is equal to or less than the specified value continuously for a predetermined number of times, the alarm is stopped, and in a state where the alarm is generated, when a predetermined time elapses,
A communication channel control method for a mobile station, wherein the communication channel is forcibly disconnected.