JP3274983B2 - How to redial a mobile phone - 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 retransmitting a call in a mobile telephone such as a PHS telephone.

[0002]

2. Description of the Related Art When a call is made by a PHS telephone, a busy or degraded radio condition (however, a control channel is being caught), rejection of radio channel assignment, congestion (however, not the inter-network congestion but the There is a case where connection with the other party is not made due to, for example, slot congestion), transmission restriction, or transition from the control channel to the service channel. Disconnect from base station if connection failed (with reason display)
To release the radio, at this time the terminal (PHS telephone)
A BT (back tone) is sent out to notify that connection is not possible, and a transition is made to a standby (standby) state. In this case, the user times out the display such as “OK OKANANAKUKUDASI” on the display unit, or clears the display with the disconnection key, then calls the destination number with the redial key (redial key) operation and calls the call key. Redial (redial) is being performed by an operation.

[0003]

However, as described above, it is troublesome to perform a plurality of key operations when performing retransmission, and a simpler method is desired.

When the connection is not possible, the reasons other than the busy state are as described above, such as deterioration of the radio condition (we are in a place with a weak electric field strength), rejection of radio channel assignment, congestion, and the like. It is better for a person to move and make a call from another place, but in the past, since the user could not determine the reason for being unable to make a call, many attempts were made to make useless calls at the same place. Was inconvenient.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method for connecting a mobile phone to a mobile phone when a connection cannot be established by a previous call.
In the method of redialing a mobile phone that redials based on the analysis result of the reason for connection failure, the next candidate
If switched to a base station, wait for next candidate
When the retransmission key is pressed, retransmission is performed to the next candidate base station .

Also, in the method of re-transmitting a mobile telephone which performs re-transmission based on the result of analysis of the reason for connection failure when the connection cannot be established by the immediately preceding transmission, the mobile station is switched to the next candidate base station according to the analysis result. Enters the standby state with the next candidate, starts the retransmission
If the retransmission key is pressed before the expiration of the attached timer, retransmission is performed to the next candidate base station.

[0007] Further, the retransmission of the mobile telephone described above.
In the method, the same base station is selected according to the analysis result.
In such a case, a message is displayed to the user .

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a retransmission method for a mobile telephone according to the present invention;

FIG. 3 is an operation flowchart at the time of the first transmission. First, when a calling operation is performed in step S11, it is determined whether or not data exists in the dial data area of the memory.
If there is no data, the process proceeds to step S13 to wait for dial input. On the other hand, if there is data in the dial data area, the process proceeds to step S14, where the data in the dial data area is set as the called number, and in step S15, the data in the dial data area is copied to the redial dial data area. Then, in step S16, after setting other information elements related to transmission such as a protocol identifier, a call number, and a message type, the process proceeds to link channel establishment in step S17, and it is confirmed in step S18 that link channel allocation is completed. Then, the process proceeds to the service phase process of step S19. In this service phase process, various processes for appropriate operation of the link access procedure on the associated control channel, specifically, “basic procedure for securing a wireless transmission path”, and “omitting the link procedure” After performing processing such as "definition of commands that can be transmitted" and "management of sequence numbers", if it is confirmed in step S20 that this processing has been completed, the process proceeds to the communication phase processing of step S21, and further proceeds to step S21.
Proceed to call 22.

[0010] When a call is established, step S
To make a call again after disconnection of step 23, step S24
Or the normal retransmission processing in step S25. Here, the normal outgoing call processing is a method of inputting a destination number at a key input section and operating a call key to make a call, and the normal re-calling processing is to recall a stored destination number. This is a method in which after a call key is selected and specified, a call key is operated to make a call.

On the other hand, if the assignment of the link channel is not completed in step S18, or if the service phase is not completed and connection is not established in step S20, the process proceeds to step S26 to analyze the reason for connection failure.

FIG. 1 shows an operation flowchart after the analysis of the reason for the connection failure in step S26. First, the reason for the connection failure is analyzed in step S26. The reason for the connection failure is, for example, an assignment reject reason in the link channel assignment reject message sent from the base station, a reason display value of the reason display information element at the time of disconnection, or the like. Can be analyzed from If it is determined in step S27 based on this analysis that the reason for the connection failure is that the wireless channel is not established, such as rejection of wireless channel assignment or congestion regulation, the process proceeds to base station reselection and retransmission processing in step S28. . The base station reselection and retransmission processing will be described later in detail.

On the other hand, if it is determined in step S27 that the wireless channel has been established but the connection cannot be established, such as when the reason for connection failure is busy, the flow advances to step S29 to start the retransmission acceptance timer. Then, if the retransmission key is pressed as shown in step S31 before the retransmission reception timer expires in step S30, retransmission processing is performed as shown in step S32, and the data in the retransmission data area is changed to the called number. Set. Thereafter, as in the case of the immediately preceding call, link channel establishment (step S33), link channel assignment completion determination (step S34), service phase processing (step S35), service phase completion determination (step S36), communication phase processing (step S36) S3
Proceed to 7), and reach the call in step S38. At this time,
If the assignment of the link channel is not completed in step S34 or the service phase is not completed in step S36 and the connection with the partner is not made, the process returns to step S26 for analyzing the reason for the connection failure.

If the retransmission key is not depressed before the retransmission reception timer expires in step S30, the process proceeds to step S39, where the normal transmission processing is performed, and the fact that the normal transmission processing has been performed is displayed on the display. Is displayed.

FIG. 2 is a flowchart showing a case where the analysis result of the connection failure indicates that the wireless channel cannot be established, and the processing for reselecting and retransmitting the base station in step S28 is performed. In the base station reselection and retransmission process (step S28), first, in step S40, the next candidate of the base station is selected from the monitoring list. At this time, specifically, the base station having the strongest RSSI after the current base station is selected by checking the RSSI (electric field strength) of the monitoring list. Also, in the event of switch congestion or network failure,
Even if a base station in the same area is selected, it cannot be connected because there is a fault in the connected network side or the network, so if a base station in a different area is on the monitoring list, the base station in a different area Select When the next candidate is selected, if it is determined in step S41 that there is no next candidate, the process proceeds to step S42, where the same base station is selected. In step S43, a message, for example, "saihassin" is displayed on the display device, and the process enters a standby state (standby) in step S44. Thereafter, when the wireless channel is restored and re-transmission is performed, a normal re-transmission process, that is, a method of selecting and specifying a transmission destination number using a re-transmission key and transmitting using a call key is employed. Note that other methods of notifying the user that the connection is not immediately established even after the retransmission is performed include notification by light using an LED or the like, sound (beep sound), and vibration (vibration). In this way, when the mobile telephone using the wireless interface cannot be connected after calling, it releases the wireless channel and starts an operation of acquiring the control channel again for the next connection and standby. Then, when the redial key is pressed while capturing the control channel, the transmission process is started immediately after the capture of the control channel, and the connection is established.

On the other hand, when the next candidate for the base station is selected and the wireless channel is restored, the mobile station waits for the next candidate as shown in step S45. At the same time, the process proceeds to step S46, and the retransmission acceptance timer starts operating. Then, if the retransmission key is pressed as shown in step S48 before the retransmission reception timer expires in step S47, retransmission processing is performed as shown in step S49, and the data in the retransmission data area is set to the called number. Set. After that, as shown in FIG. 1, the link channel is established (step S33), the link channel assignment is completed (step S34), and the service phase process is performed (step S35), as in the case where retransmission is performed after a busy signal or the like. Then, the process proceeds to the service phase completion determination (step S36), the communication phase process (step S37), and reaches the call in step S38.

If the retransmission key is not depressed before the expiration of the retransmission reception timer in step S47 in FIG. 2, the process proceeds to step S50, where normal transmission processing is performed, and normal transmission processing is performed. Displayed on the display.

According to the retransmission method described above, if the connection cannot be established in the first transmission, the reason display /
The mobile terminal determines the status based on the notification, etc., and allows retransmission using only the redial key, except when the indication of the reason for disconnection corresponds to restrictions such as transmission restriction. Very easy. Further, the retransmission using only the retransmission key is performed only when retransmission is performed within a predetermined time (for example, 10 seconds) from the immediately preceding transmission, and when the predetermined time is exceeded, the normal transmission method is used. Therefore, it is possible to confirm the previously transmitted number by the retransmission key operation as in the related art, but it is possible not to transmit the number. Furthermore, when the wireless channel is not established and the same base station cannot retransmit, the base station is replaced, so that the probability of securing a call increases and the allocation and congestion of the base station are reduced. can do.
Furthermore, if a wireless channel is not established and connection cannot be established even after re-transmission, the user is notified of the fact, so that unnecessary re-transmission at the same location can be prevented from being repeated many times. This makes it possible to make efficient calls and make the phone very easy to use.

In the above-described embodiment, the present invention is applied to PH.
The case where the present invention is applied to an S telephone is applicable to a mobile telephone, an automobile telephone, and the like, as well as the present invention.

[0020]

As described above, according to the method for redialing a mobile telephone according to the present invention, when a call cannot be made, the redialing operation can be greatly simplified.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a retransmission method of a mobile phone according to an embodiment of the present invention and illustrating a part of the operation.

FIG. 2 is a flowchart showing a retransmission method of the mobile phone according to the embodiment of the present invention and illustrating a part of the operation.

FIG. 3 is a flowchart showing an embodiment of a method for re-transmitting a mobile phone according to the present invention, and illustrating a part of the operation.

Continuation of front page (56) References JP-A-7-107553 (JP, A) JP-A-53-73905 (JP, A) JP-A-8-298677 (JP, A) JP-A-8-182038 (JP) JP-A-5-37451 (JP, A) JP-A-6-315179 (JP, A) JP-A-6-9245 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB Name) H04Q 7/00-7/38 H04B 7/24-7/26

Claims (3)

(57) [Claims] 1. When a connection cannot be established by the immediately preceding call,
In the method of redialing a mobile phone that performs redialing based on the analysis result of the reason for connection failure, if the mobile terminal is switched to the next candidate base station according to the analysis result, the mobile station enters standby mode with the next candidate and presses the redial key. A method for retransmitting a mobile telephone, wherein retransmission is performed to a next candidate base station. 2. If a connection could not be established by the immediately preceding call,
In the method of redialing a mobile phone that redials based on the analysis result of the reason for connection failure, if the mobile station is switched to the next candidate base station based on the analysis result, the standby state is set for the next candidate and the retransmission reception timer starts operation. And retransmitting to the next candidate base station when the retransmit key is pressed before the retransmission reception timer expires. 3. The method according to claim 1 , wherein a message is displayed to a user when the same base station is selected according to the analysis result. Recall method.