JPH11146462A - Mobile station equipment, base station equipment, mobile communication system and mobile communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile communication system with excellent operability capable of reserving an information channel in base station equipment by a simple operation in a mobile station equipment. SOLUTION: This system is composed of mobile station equipment provided with an instruction means 1 for instructing calling with re-calling specification, a means 2 for transmitting an LCH(link channel) allocation request with the re-calling specification to base station equipment corresponding to the instruction, a standby means 3 for reporting to the effect and performing standby in the case of receiving LCH allocation denial information from the base station equipment in response to the transmission, and a reporting means 4 for reporting to the effect in the case of receiving LCH allocation-enable information from the base station equipment during the standby; and base station equipment provided with a storage means 5 for storing the LCH allocation request with the re-calling specification from the mobile station equipment, a means 6 for transmitting the LCH allocation denial information to the mobile station equipment in the case that the information channel is unavailable and an informing means 7 for informing the mobile station equipment of the fact that LCH allocation is made possible when the LCH allocation request with the re-calling specification is stored in the storage means in the case that the information channel becomes available.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile station apparatus and a base station apparatus, a mobile communication system using them, and a mobile communication method, and more particularly to a technique for coping with a case where a communication channel managed by the base station apparatus is blocked. About.

[0002]

2. Description of the Related Art In recent years, mobile communication systems such as automobile telephones, portable telephones, and simplified portable telephones (PHS) have been put into practical use. In these mobile communication systems, a mobile station such as a telephone and a base station are wirelessly connected.
The base station is connected to another telephone or the like via a communication network, and communication is performed. In the following, a simplified mobile phone system (PHS) will be described as an example.

In this simplified mobile phone system,
The base station communicates with a plurality of mobile stations. Therefore, before each mobile station starts communication with the base station, a radio channel for transmitting and receiving information (hereinafter referred to as “information channel TC (Traf)” is used.
fic Channel)) is assigned by the base station. In this simplified mobile phone system, one carrier frequency is time-division multiplexed, a time slot is allocated to each mobile station, and a time division mux (TDMA-TDD) that separates an uplink channel and a downlink channel by time.
ltiplex Access-Time Division Duplex).

In this simplified portable telephone system, when a user performs a calling operation at a mobile station, a link channel assignment request message requesting the base station to assign an information channel TC is transmitted to a control radio channel (hereinafter, referred to as a control channel). It is transmitted via a “control channel CCH (Control Channel)”. Upon receiving the link channel allocation request message, the base station first allocates the information channel TC to the mobile station according to the carrier frequency and slot of the wireless line and the availability of the wired line (the line connecting the communication network and the base station). Find out if you can.

[0005] If it can be assigned,
The base station transmits information on the information channel TC (carrier frequency, communication protocol, etc.) to the mobile station. Thus, transmission and reception of information is started. On the other hand, when the information channel TC cannot be allocated to the mobile station, the base station transmits a link channel allocation reject message to the mobile station. The mobile station that has received the link channel assignment rejection message notifies the user that the call cannot be transmitted, for example, by sound or display, and enters a reception waiting state.

The operation of the mobile station and the base station will be described in more detail with reference to the drawings. FIG. 12 and FIG.
3 shows a protocol of a phase of establishing a link channel between the mobile station and the base station. The paging channel (PCH) and the SCCH (Signaling Control Channel) for individual cells defined in this protocol.
l) and the like are defined in "2nd Generation Cordless Telephone System Standard (RCR-STD-28)" (published by the Japan Radio Industries Association), so please refer to the standard for details.

FIG. 12 shows an example of a protocol in a case where a calling process fails in this simplified portable telephone system. A mobile station that has completed location registration (details will be described later)
While receiving information transmitted by the PCH 101 and PCH 102, the mobile station enters a standby state of waiting for an outgoing call or an incoming call from the base station while synchronizing with the base station. When a call operation is performed in the mobile station (operating a call button provided on the operation unit of the mobile station to call another terminal device) in the standby state, the mobile station performs a call process. Start. The contents of this calling process are as follows.

First, a link channel establishment request message is transmitted to the base station using the uplink SCCH 103. When the base station receiving the link channel establishment request message cannot allocate the information channel TC for some reason, the base station transmits a link channel allocation rejection message to the mobile station using the downlink SCCH 104. The mobile station that has received the link channel assignment reject message interrupts the calling process and returns the PCHs 105 and 106 from the base station.
The mobile station returns to a standby state of waiting for a call from the mobile station or an incoming call from the base station while synchronizing with the base station by receiving the information transmitted by the mobile station.

FIG. 13 shows an example of a protocol in a case where the calling process is completed normally in the simplified portable telephone system. The mobile station for which the location registration has been completed, as described above,
The mobile station enters a standby state of waiting for a call from the mobile station or an incoming call from the base station while synchronizing with the base station by receiving information transmitted on the PCH 201 and PCH 202. When a calling operation is performed in the mobile station in this standby state, the mobile station starts calling processing. The contents of the calling process are as follows.

First, a link channel establishment request message is transmitted to the base station using the uplink SCCH 203. When the base station that has received the link channel establishment request message can allocate the information channel TC,
A link channel assignable message is transmitted to the mobile station using the downlink SCCH 204. The mobile station that has received the link channel assignable message starts transmitting and receiving information to and from the base station using the information channel TC205 specified by the message.

Next, operations of the mobile station and the base station for realizing the above protocol will be described with reference to flowcharts shown in FIGS.

First, the operation of the mobile station will be described with reference to the flowcharts of FIGS. When the power of the mobile station is turned on, first, a location registration process is performed (step S50). In this location registration process, the area number of the area to which the mobile station currently belongs is registered in the database of the simplified type telephone system. This location registration is performed every time the mobile station moves to a different area.
By this location registration, the mobile station and the base station always recognize each other's communication partners, and can immediately start communication when transmitting from the mobile station and when calling the mobile station from the base station. .

When the location registration is completed, the mobile station enters a standby state formed by repeatedly executing steps S51 and S52. In this standby state, PCH
The information sent by using 101 and 102 is
It is checked whether D is included (step S5).
1). Here, if it is determined that the own station ID is not included, then it is checked whether a calling operation has been performed (step S52). If it is determined that the calling operation has not been performed, the sequence proceeds to step S
Return to 51.

In this standby state, when it is determined in step S51 that the information transmitted using the PCH 101 and PCH 102 includes the ID of the own station, and in step S52, the calling operation is performed. If it is determined that the operation has been performed, the sequence proceeds to step S53.

In step S53, it is checked whether it is the uplink SCCH transmission timing. 14 to FIG.
Although not shown in the flowchart of FIG. 17, a broadcast channel BCCH (Broadcast Control Channel) is transmitted from the base station.
l) in the control information previously transmitted to the mobile station using
Information that defines the transmission timing of the CCH is included. Whether it is the transmission timing of the uplink SCCH,
The determination is made by monitoring a timer or the like that operates based on the control information.

If it is determined in step S53 that the timing is not the uplink SCCH transmission timing, the process waits until the uplink SCCH transmission timing comes while repeatedly executing step S53. When it is determined that the transmission timing of the uplink SCCH has come, the mobile station transmits a link channel assignment request message to the base station using the uplink SCCH (step S54).

Next, it is checked whether a message transmitted from the base station using the downlink SCCH has been received (step S55). If it is determined that the message has not been received, the process waits until the message is received while repeatedly executing step S55.

On the other hand, although the details will be described later, the base station which has received the link channel assignment request message transmits a link channel assignment reject message if the information channel TC cannot be assigned for some reason.
If C can be assigned, a link channel assignable message is transmitted to the mobile station using each downlink SCCH. Therefore, the mobile station performs the above-described step S55.
When it is determined that a message has been sent using the downlink SCCH, the message is analyzed (step S5).
6).

Next, based on the analysis result, it is checked whether the received message is a link channel assignment rejection message (step S57). here,
If it is determined that the message is a link channel assignment rejection message, the calling process is stopped, and the sequence proceeds to step S
Return to 51. Thus, the mobile station enters the standby state again. The above is the operation when the calling process fails.

On the other hand, if it is determined in step S57 that the link channel assignable message has been received, the process proceeds to the communication phase (step S58). Then, it is checked which process of calling or receiving should be performed (step S59). This corresponds to step S51.
In step S52, it is determined whether the step has been reached by determining "YES". In step S52, whether the step has been reached by determining "YES". If it is determined in step S59 that the call is an incoming call, the process proceeds to an incoming call process (step S60). If it is determined that the call is an outgoing call, the process proceeds to a dial sending process (step S61). The description of the incoming call processing and dial sending processing will be omitted.

Next, the operation of the base station will be described with reference to the flowcharts of FIGS. In the base station, first, normal processing is performed (step S70). In this normal processing, for example, in addition to the above-described location registration processing,
Various processes for functioning as a base station are performed. Next, it is checked whether a message sent using the uplink SCCH has been received (step S71). Here, when it is determined that the message has not been received, it is then checked whether it is the downlink SCCH transmission timing (step S74). Whether it is the transmission timing of the downlink SCCH is determined by monitoring a timer or the like that operates based on a predetermined rule.

If it is determined that the timing is not the downlink SCCH transmission timing, then it is checked whether it is the PCH timing (step S79). This PC
Whether the timing is H is determined by the downlink SCC described above.
Like the transmission timing of H, the determination is made by monitoring a timer or the like that operates based on a predetermined rule. If it is determined that the timing is not the PCH timing, the sequence returns to step S70. Hereinafter, step S70 → S
While repeatedly executing 71 → S74 → S79 → S70 →..., The mobile station enters a standby state of waiting for a message transmitted using the uplink SCCH, arrival of the downlink SCCH transmission timing, or arrival of the PCH timing.

In this standby state, the above-mentioned step S71
When it is determined that a message transmitted using the uplink SCCH has been received, it is checked whether the message is a link channel assignment request message (step S72). When it is determined that the message is a link channel assignment request message, a link channel assignment request flag is set (step S7).
3). Thereafter, the sequence returns to step S70 and returns to the standby state. If it is determined that the message is not a link channel assignment request message, the process of step S73 is skipped, and the sequence returns to step S70 to enter a standby state. As a result, whether or not the link channel assignment request has been accepted is stored in the link channel assignment request flag.

In the standby state, the step S74 is executed.
If it is determined that the timing is the downlink SCCH transmission timing, it is checked whether the link channel assignment request flag is on (step S75). Here, if it is determined that the link channel assignment request flag is not on, that is, that no link channel assignment request has been received from the mobile station, the sequence returns to step S70 and returns to the standby state. On the other hand, if it is determined in step S75 that the link channel assignment request flag is ON, that is, that the link channel assignment request has been received from the mobile station, it is checked whether link channel assignment is possible (step S75). S76).

Here, when it is determined that link channel allocation is possible, a link channel allocation possible message indicating the fact is transmitted to the mobile station (step S7).
7). Thereafter, the sequence branches to step S70,
Return to the standby state. On the other hand, if it is determined that the link channel assignment is impossible for some reason, a link channel assignment rejection message indicating the fact is transmitted to the mobile station (step S78). Thereafter, the flow branches to step S70, and returns to the standby state.

In the standby state, step S79
Is determined to be PCH timing,
Next, it is checked whether there is an incoming call from the communication network (step S80). When it is determined that there is no incoming call, the sequence branches to step S70, and returns to the standby state. On the other hand, if it is determined that there is an incoming call,
The base station recognizes that the mobile station has been called from the communication network, and transmits information to which the ID of the mobile station has been added to the mobile station using the PCH (step S81). Thereafter, the flow branches to step S70, and returns to the standby state.

By operating as described above, a handshake in the radio section between the mobile station and the base station is established, and thereafter information is transmitted and received between these two stations.

[0028]

As described above,
In a conventional mobile communication system, when a link channel assignment is requested to a base station by a call from a mobile station, an information channel on the base station side or a slot of a TDMA frame may be blocked. In such a case, since the base station only transmits the link channel assignment reject message to the mobile station, the mobile station has to manually repeat the calling operation until the information channel or the slot of the TDMA frame becomes empty. Further, such a state tends to occur frequently in a mobile communication system in which a small service area is covered with a small number of lines, and a phenomenon that a call becomes difficult when traffic is increased often occurs.

As a technique for solving such a problem, for example, a "wireless telephone apparatus" described in Japanese Patent Application Laid-Open No. 8-51664 is known. According to this technology, when a telephone line network is busy and a mobile station can make a call when the telephone network is released and a call can be made, the base station notifies the mobile station of the fact. Is automatically re-activated when answered.

However, this radio telephone apparatus is not applicable when the radio section between the mobile station and the base station is busy, for example, when the information channel is not vacant or the TDMA slot is not vacant. However, it cannot cope with a problem that occurs in a communication system that covers a small service area with a small number of lines.

[0031] The present invention has been made to solve such a conventional problem, and is excellent in operability in which an information channel can be reserved on the base station device side by a simple operation in the mobile station device. , A base station device, a mobile communication system, and a mobile communication method.

[0032]

In order to achieve the above object, a mobile station apparatus according to the present invention is a mobile station apparatus which communicates with another apparatus via a base station apparatus as shown in FIG. Instruction means for instructing a call with recall designation;
Link channel assignment request transmission means for transmitting a link channel assignment request with recall designation to the base station apparatus in accordance with the instruction of the indication means, and a link with recall designation designated transmitted by the link channel assignment request generation means When information of link channel assignment rejection is sent from the base station apparatus in response to the channel assignment request, standby means for notifying that link channel assignment is not possible and waiting, and during standby by the waiting means, And notifying means for notifying that link channel allocation has been enabled when information on link channel allocation is received from the base station apparatus.

Further, for the same purpose, as shown in FIG. 1, the base station apparatus of the present invention is a base station apparatus for controlling communication between a mobile station apparatus and another apparatus. Storage means for storing that a link channel assignment request with a recalling designation has been sent, and the mobile station apparatus, when the information channel for sending and receiving information is unavailable, the link channel assignment rejection information If the link channel assignment rejection sending means for sending the information channel becomes available, it is stored in the storage means that a link channel assignment request with recall designation has been sent. Notification means for notifying the mobile station device that link channel allocation has been enabled.

For the same purpose, the mobile communication system of the present invention is a mobile communication system for performing communication between a mobile station device and another device via a base station device as shown in FIG. The mobile station device includes: instruction means for instructing a call with recall designation, and link channel allocation for transmitting a link channel assignment request with recall designation to the base station device in accordance with the instruction of the instruction means. A request transmission unit, and a link channel rejection information transmitted from the base station apparatus in response to the link channel allocation request with recall designation transmitted by the link channel allocation request generation unit. A standby unit for notifying that the allocation cannot be performed, and a standby unit for notifying that the link channel can be allocated when the base station apparatus transmits information indicating that a link channel can be allocated during standby by the standby unit. Notification means for notifying that the channel assignment is enabled, wherein the base station apparatus stores that a link channel assignment request with recall designation has been sent from the mobile station apparatus. And link channel rejection transmitting means for transmitting link channel rejection information to the mobile station device when the information channel for transmitting and receiving information is unavailable, and the information channel becomes usable. In this case, if it is stored in the storage means that a link channel assignment request with a re-call designation has been sent, a notifying means for notifying the mobile station device that link channel assignment is enabled, And

According to this mobile communication system, when a calling operation is performed in the mobile station apparatus, the base station apparatus operates in a manner such as that a communication information channel (frequency channel) or a TDMA slot is blocked. If there is, the mobile station is notified of that fact and is made to wait. Then, when an empty slot or an empty carrier frequency is created, a normal call operation is performed from the base station apparatus side to the corresponding mobile station apparatus.
When a calling operation is performed in the base station apparatus in this state, it is possible to communicate with a target partner using an empty slot or an empty carrier frequency. In other words, the user can reserve an information channel on the base station apparatus side by a simple operation in the mobile station apparatus, so that even when traffic is high, a call can be made as soon as the channel becomes available.

Further, for the same purpose, a mobile communication method according to the present invention is a mobile communication method for performing communication between a mobile station device and another device via a base station device, wherein the mobile station device has a The base station device that has transmitted the link channel assignment request with the call designation to the base station device and has received the link channel assignment request with the recall call designation indicates that there is the link channel assignment request with the recall call designation. If the information channel for transmitting and receiving information is unavailable, the mobile station device transmits link channel assignment rejection information to the mobile station device, and the mobile station device receiving the link channel assignment rejection information is linked. Notifies that channel assignment is not possible and waits,
The base station apparatus, when the information channel becomes available, if it is stored that there is a link channel assignment request with re-call designation, the base station apparatus is waiting for the link channel assignment is possible The mobile station device, which is notifying the mobile station device and receiving the information indicating that the link channel can be allocated, notifies that the link channel has been allocated.

In this case, when there is a call from another device to the mobile station device, the base station device causes the mobile station device to perform communication between the mobile station device and the other device. After the completion of the communication, the mobile station device and the other device can communicate using the information channel used for the communication.

Further, when the mobile station apparatus performs handover, the mobile station apparatus synchronizes with the handover destination base station apparatus, and requests the base station apparatus to perform the link channel assignment request with the recalling designation. Can be automatically transmitted to the base station apparatus.

[0039]

FIG. 2 is a block diagram showing a configuration of a mobile station apparatus according to an embodiment of the present invention. This mobile station device includes an antenna 11, a radio unit 12, a signal processing unit 13,
It comprises a central processing unit (hereinafter referred to as “CPU”) 14, a signal processing unit 15, a display unit 16, an operation unit 17, and a speaker 18.

The antenna 11 receives a radio signal radio wave and supplies it to the radio unit 12 as a radio frequency band signal. The antenna 11 receives a signal from the wireless unit 12 and emits it as a radio signal radio wave.

The radio section 12 extracts a significant signal component from the radio frequency band signal received from the antenna 11 and supplies this to the signal processing section 13. Also, this wireless unit 12
Supplies the modulated signal from the signal processing unit 13 to the wireless unit 12.

The signal processing section 13 demodulates the signal received from the radio section 12. Thereby, a demodulated signal is obtained. This demodulated signal is supplied to the CPU 14 and the control unit 15. Further, the signal processing unit 13 modulates communication data from the CPU 14. The modulation / demodulation used in the signal processing unit 13 is, for example, π / 4 shift QPSK (Quadra
modulation / demodulation can be used.

The CPU 14 controls the entire operation of the mobile station device. The CPU 14 is connected to a signal processing unit 15, a display unit 16, and an operation unit 17 in addition to the signal processing unit 13 described above. The CPU 14 performs, for example, capture and analysis of a demodulated signal obtained by the signal processing unit 13, generation of data to be displayed on the display unit 16, processing according to data input from the operation unit 17, and the like. Details of the processing performed by the CPU 14 will be described later with reference to a flowchart.

The signal processing unit 15 generates an audio signal based on the signal from the signal processing unit 13 under the control of the CPU 14. The voice signal includes a signal for generating a normal ringing sound and a signal for generating a sound indicating that re-calling is enabled. The audio signal generated by the signal processing unit 15 is supplied to a speaker 18. The speaker 18 emits a sound based on the audio signal from the signal processing unit 15.

The display unit 16 is composed of, for example, an LCD, and displays the operation state of the mobile station device. For example,
The display unit 16 displays the type of operation mode, a guidance message in each operation mode, a telephone number stored in a memory included in the CPU 14, an incoming message, and the like.

The operation unit 17 includes various buttons (switches),
For example, in addition to a numeric keypad, an operation mode selection button, a normal call button, and the like, a recall button corresponding to the designation means of the present invention is provided. When the recall button is pressed, a call with recall designation is performed (details will be described later).

FIG. 3 is a block diagram showing a configuration of the base station apparatus according to the embodiment of the present invention. This base station device
Antenna 21, radio unit 22, signal processing unit 23, CPU2
4. Memory unit 25, line interface unit (line IF)
And a line 27.

The antenna 21, the radio unit 22, and the signal processing unit 23 correspond to the antenna 11, the radio unit 12, and the signal processing unit 13 in the mobile station apparatus, respectively, and their operations are substantially the same.

The CPU 24 controls the entire operation of the base station device. The CPU 24 is connected with a memory unit 25 and a line interface unit 26 in addition to the signal processing unit 23 described above. The CPU 24 captures and analyzes the demodulated signal obtained by the signal processing unit 23, controls the line interface 26, and the like. This CPU 14
The details of the process performed by will be described later with reference to a flowchart.

The memory 25 stores the states of a plurality of mobile station devices managed by the base station device and other various data. The line interface 26 is an interface circuit for connecting the base station device to a communication network. A line 27 is drawn from the line interface 26 and connected to a communication network (not shown).

[0051] A mobile communication system according to the present invention comprises the above-described mobile station apparatus and base station apparatus.
Although this mobile communication system is composed of a plurality of mobile station devices and a plurality of base station devices, one mobile station device and one base station will be described below in order to simplify the description. The device will be described.

FIG. 4 shows a format of a link channel assignment request message transmitted using the uplink SCCH. Optional part 5 of information sent on this uplink SCCH
00 is set with re-call designation data indicating that the re-call designation is added to the link channel assignment request.
The base station apparatus refers to the option section 500 to identify whether the message is a link channel assignment establishment message with a recalling request or a normal link channel assignment request message.

FIG. 5 shows a format of a link channel assignment reject message transmitted using the downlink SCCH. Optional part 5 of information transmitted on this downlink SCCH
01 is set with re-call acceptance data indicating that a link channel establishment request with re-call designation has been accepted. As a result, the mobile station device can know that the link channel assignment request has been rejected at this time, but the recalling designation has been accepted. For details of each data shown in FIGS. 4 and 5, please refer to the above-mentioned “Second generation cordless telephone system standard (RCR-STD-28)”.

In the above configuration, operations of the mobile station apparatus and the base station apparatus according to the embodiment of the present invention will be described.

First, a protocol of a link channel establishment phase of the mobile communication system will be described with reference to FIG. The mobile station device whose location registration has been completed is PCH3
The mobile station enters a standby state of waiting for an outgoing call from the mobile station or an incoming call from the base station while synchronizing with the base station by receiving information transmitted on the PCH 302 and the PCH 302. In this standby state, when the mobile station device performs a call operation with recall specification, that is, when the recall button of the operation unit 17 is pressed, the mobile station device starts a call process with recall specification described below. .

That is, first, the mobile station apparatus transmits the uplink SCCH3
Using No. 03, a link channel assignment request message in which retransmission call designation data is set in option section 500 is transmitted to the base station apparatus. When the base station apparatus that has received the link channel assignment request message cannot allocate the information channel TC such that the carrier frequency is completely occupied, the TDMA slot is empty, or the line 27 is completely occupied, Downlink SCCH
Using 304, a link channel assignment rejection message in which re-call acceptance data is set in option section 501 is transmitted to the mobile station apparatus. Thereafter, the mobile station apparatus receives a call from the base station apparatus and receives information transmitted on the PCH 305 and PCH 306, thereby synchronizing with the base station apparatus and calling the mobile station apparatus or receiving a call from the base station apparatus. Return to the standby state waiting for.

When a free space is created in the information channel TC, the base station apparatus transmits information with the ID of the mobile station apparatus to the PCH3.
06 to the mobile station apparatus. The mobile station device that has received the information with the ID transmits a normal link channel assignment request message without a recall designation to the base station device using the uplink SCCH 307. The base station apparatus that has received the link channel assignment request message uses the downlink SCCH 308 to transmit a link channel assignable message to the mobile station apparatus. In this state, since the information channel TC is secured in the base station device, a handshake in a wireless section between the mobile station device and the base station device is established, and the information channel TC is established.
Transmission and reception of information by C309 is started.

Next, the operation of the mobile station apparatus and the base station apparatus for realizing the above protocol will be described with reference to the flowcharts shown in FIGS.

First, the operation of the mobile station will be described with reference to the flowcharts of FIGS. In addition,
The processing shown in this flowchart is mainly performed by the CPU.
14 is performed.

First, when the power of the mobile station apparatus is turned on,
A position registration process is performed (Step S10). When the location registration is completed, the mobile station device enters a standby state formed by repeatedly executing steps S11 and S12.

In this standby state, it is checked whether or not the information transmitted using PCH 301 and PCH 302 includes the ID of the own station (step S1).
1). More specifically, a radio frequency band signal obtained by receiving a radio signal radio wave with the antenna 11 is
2 is supplied. The radio unit 12 extracts a significant signal component from the radio frequency band signal from the antenna 11 and supplies the signal component to the signal processing unit 13. The signal processing unit 13 demodulates a signal from the wireless unit 12 and supplies the signal to the CPU 14. The CPU 14
By analyzing the demodulated signal from the signal processing unit 13, it is checked whether or not the own station ID is included. The reception of various types of information described below is performed in the same manner as described above.

If it is determined in step S11 that the own station ID is not included, then it is checked whether a calling operation has been performed (step S12). That is, it is checked whether the call button or the recall button provided on the operation unit 17 of the mobile station device has been operated. Here, if it is determined that there is no call operation, the sequence returns to step S11, and thereafter, steps S11 and S1
2 enters a standby state in which it is repeatedly executed.

Although not shown in FIG. 7, in this standby state, the mobile station device transmits the PCH from the base station device.
By receiving the information transmitted using the communication, synchronization with the base station apparatus is established.

In the mobile station apparatus in the standby state, if it is determined in step S11 that the information transmitted using PCHs 301 and 302 includes its own ID, the sequence branches to step S15. I do.
This sequence occurs when there is an incoming call from another device and when the information channel TC changes from the unusable state to the usable state (details will be described later).

In the mobile station apparatus in the standby state, when a call button or a re-call button provided on the operation unit 17 of the mobile station apparatus is operated, step S1 is performed.
If it is determined in step 2 that the calling operation has been performed, then
It is checked whether the calling operation is a recall, that is, whether the recall button is pressed (step S1).
3).

If it is determined that the call operation with recall designation has been performed, CPU 14 sets the recall designation data in option portion 500 of the link channel assignment request message transmitted to the base station device. (Step S
14). Thereafter, the sequence branches to step S15. If it is determined in step S13 that a normal call operation has been performed, that is, that the normal call button has been operated, the sequence proceeds to step S15.

In step S15, it is checked whether it is the uplink SCCH transmission timing. This is determined by monitoring a timer or the like that operates based on control information transmitted to the mobile station apparatus in advance from the base station apparatus using the broadcast channel BCCH, as described above. If it is determined in step S15 that the timing is not the uplink SCCH transmission timing, the process waits until the uplink SCCH transmission timing comes while repeatedly executing step S15.

At step S15, when it is determined that the transmission timing of the uplink SCCH has come, the mobile station apparatus specifies a recalling call when a normal call button provided on operation unit 17 is pressed. A link channel assignment request message not attached is sent to the base station device using the uplink SCCH, and a link channel assignment request message attached with the recall designation is sent when the recall call button is pressed. (Step S16). More specifically, C
The PU 14 supplies data constituting the link channel assignment request message to the signal processing unit 13. Signal processing unit 1
3 modulates this and supplies it to the radio unit 12. Radio unit 12
Converts the modulated signal from the signal processing unit 13 into a radio frequency band signal and supplies the signal to the antenna 11. As a result, the link channel assignment request message is emitted into the air as a radio signal radio wave. Transmission of various types of information described below is performed in the same manner as described above.

Next, it is checked whether a message transmitted from the base station apparatus using the downlink SCCH has been received (step S17). Here, when it is determined that the message has not been received, the process waits until a message transmitted using the downlink SCCH is received while repeatedly executing step S17.

On the other hand, although the details will be described later, if the base station that has received the link channel assignment request message cannot allocate the information channel TC for the above-described reason, the base station that has transmitted the link channel assignment request message, The ID is stored in the memory unit 25, and a link channel assignment reject message is transmitted to the mobile station device using the downlink SCCH. At this time, the base station apparatus transmits the option part 5 of the received link channel assignment request message.
If the recalling designation data is set to 00, a link channel assignment rejection message in which recalling acceptance data is set in option section 501 is transmitted to the mobile station. If the information channel TC can be assigned, a link channel assignable message is transmitted to the mobile station device using the downlink SCCH.

When the mobile station device determines in step S17 that a message transmitted using the downlink SCCH has been received, it analyzes the message (step S18). Next, based on the analysis result, it is checked whether the received message is a link channel assignment rejection message (step S19). Here, if it is determined that the message is a link channel assignment rejection message, then it is checked whether or not the recalling reception data 501 is set in the message (step S20). Then, when it is determined that the re-call acceptance data 501 is set, the re-call acceptance flag is set, and the re-call acceptance display is turned on (step S21). Thereafter, the sequence returns to step S11 and enters a standby state.

The recall acceptance flag can be provided in a memory (not shown) included in CPU 14. The above-described recall acceptance display can be realized by displaying on the display unit 16 that a link channel assignment request with recall designation has been accepted. Alternatively, the recall button of the operation unit 17 may be constituted by a button with a display, and the button may be turned on to realize the recall button. Note that, in these cases, a configuration may be adopted in which a tone is further provided to notify that a link channel assignment request with a recalling designation has been received. In this case, it is preferable to notify the user with a tone having a tone different from the normal ringing tone and the tone notifying that re-calling has become possible. This allows
At this time, even if the link channel allocation request is rejected, a reservation state is made to wait for an available information channel TC. Therefore,
The user does not need to perform a call operation until a message indicating that the information channel TC has become free is received.

If it is determined in step S20 that the recall data has not been set, the sequence returns to step S11 to enter a standby state. This is the same operation as the conventional base station apparatus, and the call operation can be performed again.

If it is determined in step S19 that the message is not a link channel assignment rejection message, that is, it is a link channel assignable message, the flow shifts to a communication phase (step S22). Here, an optimal protocol and an optimal wireless channel are selected for each service. Next, it is checked which process of calling or receiving should be performed (step S23). This is performed by checking whether the step has been reached by determining “YES” in step S11 or by determining “YES” in step S12. If it is determined in step S23 that the call is a call, the process proceeds to a call process (step S23).
24).

On the other hand, if it is determined in step S23 that the call is an incoming call, then the incoming call is designated by a re-call designation, that is, the re-call acceptance data is stored in the option section 501 of the link channel assignable message previously received. It is checked whether it is set (step S25). Here, when it is determined that the re-call acceptance data is not set, the process shifts to a normal incoming call process (step S2).
6). On the other hand, if it is determined that the re-call acceptance data is set, it is recognized that the incoming call is a response to the request for the re-call, and a call processing instruction is displayed (step S27). That is, at the same time that a message prompting a call is displayed on the display unit 15,
Is activated, and a sound different from the normal ring tone is generated.
Thereafter, the sequence returns to step S11 and enters a standby state.

In this state, if the user performs a normal calling operation, the information channel TC is secured by the mobile station apparatus, so that the base station apparatus always returns a link channel assignable message. Therefore, the user can immediately talk with the target party. A detailed description of the incoming call processing and the outgoing call processing will be omitted.

Next, the operation of the base station apparatus will be described with reference to the flowcharts of FIGS. In the base station device, first, normal processing is performed (step S3).
0). In the normal process, for example, in addition to the above-described location registration process, various processes for functioning as a base station device are performed. Next, it is checked whether a message transmitted using the uplink SCCH has been received (step S31). More specifically, the radio signal wave is transmitted to the antenna 2
The radio frequency band signal obtained by the reception at 1 is supplied to the radio unit 22. The radio unit 22 extracts a signal component from a radio frequency band signal from the antenna 21 and supplies the signal component to the signal processing unit 23. The signal processing unit 23 demodulates a signal from the wireless unit 22 and supplies the signal to the CPU 24. The CPU 24 analyzes the demodulated signal from the signal processing unit 23 to check whether a message has been sent using the uplink SCCH. The reception of various types of information described below is performed in the same manner as described above.

At step S31, when it is determined that the message transmitted using the uplink SCCH has not been received, it is then checked whether or not it is the transmission timing of the downlink SCCH (step S36). Down S
Whether or not it is the CCH transmission timing is determined by monitoring a timer or the like that operates according to a predetermined rule as described above.

If it is determined that it is not the transmission timing of the downlink SCCH, then it is checked whether there is a vacancy in the information channel TC, that is, whether there is a vacancy in the carrier frequency, slot and line of the radio channel. (Step S43). If it is determined that there is no free space in the information channel TC, the sequence returns to step S30. Hereinafter, steps S30 → S31 → S36 → S43
→ S30 → ...
Reception of message sent using CCH, downlink S
The apparatus enters a standby state of waiting for the arrival of the CCH transmission timing and the availability of the information channel TC.

In this standby state, the above-mentioned step S31
When it is determined that a message transmitted using the uplink SCCH has been received, it is checked whether the message is a link channel assignment request message (step S32). Here, when it is determined that the message is a link channel assignment request message,
It is checked whether there is a recall designation (step S3).
3). This is performed by checking whether or not recalling designation data is set in the option section 500 of the received link channel assignment request message.

When it is determined in step S33 that there is a recall designation, the link channel assignment request flag is set and the recall flag is set (step S34). These link channel request flag and recall flag are defined in the memory unit 25. Thereafter, the sequence returns to step S30 and returns to the standby state. On the other hand, if it is determined that there is no recall designation, the link channel allocation request flag is set and the recall flag is cleared (step S35). Thereafter, the sequence returns to step S30 and returns to the standby state. If it is determined in step S32 that the message is not a link channel assignment request message, the processing in steps S33 to S35 is skipped, and the sequence returns to step S30 to enter a standby state. As a result, whether or not the link channel assignment request has been accepted is stored in the link channel assignment request flag, and whether or not the link channel assignment request has a recall designation is stored in the recall flag.

In the above standby state, step S36
When it is determined that the timing is the downlink SCCH transmission timing, it is checked whether the link channel assignment request flag is on (step S37). Here, if it is determined that the link channel assignment request flag is not on, that is, that no link channel assignment request has been received from the mobile station apparatus, the sequence returns to step S30, and returns to the standby state. On the other hand, if it is determined in step S37 that the link channel assignment request flag is ON, that is, that the link channel assignment request has been received from the mobile station apparatus, it is checked whether the link channel assignment is possible (step S37). Step S38).

Here, when it is determined that link channel allocation is possible, a link channel allocation possible message indicating that is determined is transmitted to the mobile station apparatus (step S).
39). More specifically, the CPU 24 transmits the data constituting the link channel assignment request message to the signal processing unit 2.
Supply 3 The signal processing unit 23 modulates this and supplies it to the radio unit 22. The wireless unit 22 converts the modulated signal from the signal processing unit 23 into a radio frequency band signal and supplies the signal to the antenna 21. As a result, the link channel assignment request message is emitted into the air as a radio signal radio wave. Transmission of various types of information described below is performed in the same manner as described above. Thereafter, the sequence branches to step S30, and returns to the standby state.

On the other hand, if it is determined in step S38 that link channel allocation is impossible for the above-described reason, it is checked whether the recall flag is on (step S40). Here, when it is determined that the re-calling flag is ON, a link channel assignment rejection message including the re-calling acceptance data is transmitted to the mobile station device (step S41). On the other hand, when it is determined that the recall flag is off, a link channel assignment reject message not including the recall acceptance data is transmitted to the mobile station device (step S42). Thereafter, the flow branches to step S30, and returns to the standby state.

In the standby state, the above step S43
When it is determined that there is a vacancy in the information channel TC, it is checked whether it is PCH timing (step S44). Whether or not the timing of the PCH is determined by monitoring a timer or the like that operates based on a predetermined rule, similarly to the transmission timing of the downlink SCCH described above. If it is determined that the timing is not the PCH timing, the sequence proceeds to step S30.
And returns to the standby state.

On the other hand, if it is determined in this step S44 that it is the PCH timing, then it is checked whether there is an incoming call from the communication network (step S45).
When it is determined that there is an incoming call, the base station apparatus recognizes that the mobile station apparatus managed by the base station apparatus has been called from the communication network, and adds the ID of the mobile station apparatus. The obtained information is transmitted to the mobile station device using the PCH (step S47). Thereafter, the flow branches to step S30, and returns to the standby state.

If it is determined in step S44 that there is no incoming call, it is then checked whether the recall flag is on (step S46). If it is determined that the recall flag is not on, the information channel TC
It is recognized that there is no mobile station device waiting for the vacancy, and the sequence branches to step S30. Thereby, the base station device enters a standby state.

If it is determined in step S46 that the recall flag is on, it is recognized that there is a mobile station apparatus waiting for the information channel TC to be available, and the mobile station apparatus determines that there is a mobile station apparatus. The information to which the device ID is added is transmitted to the mobile station device using the PCH (step S
47). Thereafter, the flow branches to sequence step S30.
Return to the standby state. Accordingly, when there is a mobile station apparatus waiting for the availability of the information channel TC, the PCH
Information to which the ID of the mobile station device is added at the timing is transmitted to the mobile station device.

The mobile station apparatus that has received the information to which the ID has been added waits for the uplink SCCH transmission timing as described above with reference to FIGS. 7 and 8 (step S15). Then, when the transmission timing of the uplink SCCH arrives, a link channel assignment request message in which retransmission call designation data has not been set is transmitted to the base station device (step S16). After that, the mobile station apparatus
It waits for a message sent using the CCH (step S17).

The subsequent operation has already been described, but will be briefly described again as follows. Since the base station apparatus that has received the link channel assignment request message transmitted using the uplink SCCH can allocate the information channel TC, the base station apparatus transmits link channel assignable data to the mobile station apparatus at the downlink SCCH transmission timing. .

The mobile station device which has received the link channel assignable message transmitted using the downlink SCCH analyzes the message (step S18). As a result, it is determined that the link channel can be allocated (step S19), and the process shifts to the communication phase (step S22). Then, it is determined that the incoming call has been shifted to the communication phase (step S23), and it is determined that the incoming call has been designated by re-calling (step S25), so that a call processing instruction is displayed. (Step S27). As a result, a message prompting a recall is displayed on the display unit 16 and at the same time, the speaker 18 is displayed.
Generates a sound different from the ringtone.

As described above, according to the radio selective calling receiver according to the embodiment of the present invention, when the mobile station device performs a calling operation, if the information channel TC is unusable, The base station apparatus notifies the mobile station apparatus of the fact, and then, when the information channel TC becomes available,
That effect is notified to the mobile station apparatus. Therefore, the user can perform the calling operation in a state where the user can surely connect to the communication partner, so that there is no need to perform a useless calling operation as in the related art. The situation that traffic rises can be avoided.

Next, another embodiment of the radio selective calling receiver of the present invention will be described. In a mobile station device,
If the information channel TC is unusable when the calling operation is performed by designating the re-call, the process enters a state of waiting for the information channel TC to become free. If there is an incoming call from the communication network during this time, an incoming call process for the incoming call is performed (sequence from step S25 in FIG. 8 to step S26).

In this case, after the call for the incoming call is completed, the base station apparatus secures the information channel TC used for the call and issues a call to the mobile station apparatus in the information channel TC idle waiting state. It can be configured to transmit a message prompting call operation. According to this configuration, the call in the mobile station device is reliably completed, and the information channel TC can be reliably ensured, so that the information channel TC can be used efficiently.

Further, in the above-described embodiment, a case has been described where the mobile station apparatus exists in the area managed by the predetermined base station apparatus. And handover between base station devices. In this case, after the synchronization with the base station device managing the new area is established, a process for realizing the calling operation by the re-calling designation shown in the flowcharts of FIGS. Can be automatically performed. According to this configuration, there is an advantage that a call can be made immediately if the information channel TC managed by the handover destination base station apparatus is free.

[0096]

As described in detail above, according to the present invention,
A mobile station device with excellent operability that can reserve an information channel on the base station device side by a simple operation in the mobile station device,
A base station device, a mobile communication system, and a mobile communication method can be provided.

That is, when a call from the mobile station apparatus cannot be shifted to the communication phase, the base station apparatus automatically returns the call from the base station apparatus without repeating the call operation a number of times until the call can be shifted to the communication phase. Therefore, the calling operation can be simplified, and the convenience for the user can be improved. Further, since the call is automatically returned from the base station without repeating the calling operation many times, unnecessary transmission using the SCCH from the mobile station device is eliminated, and effective use of radio waves can be achieved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a mobile station device, a base station device, and a mobile communication system of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a mobile station device according to the embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a base station apparatus according to the embodiment of the present invention.

FIG. 4 is an uplink SCCH used in an embodiment of the present invention.
FIG. 3 is a diagram showing a configuration of data transmitted in the example shown in FIG.

FIG. 5 is a downlink SCCH used in the embodiment of the present invention.
FIG. 3 is a diagram showing a configuration of data transmitted in the example shown in FIG.

FIG. 6 is a diagram showing a main part of a protocol performed between the mobile station device and the base station device according to the embodiment of the present invention.

FIG. 7 is a flowchart (part 1) showing an operation of the mobile station apparatus according to the embodiment of the present invention.

FIG. 8 is a flowchart (part 2) illustrating an operation of the mobile station apparatus according to the embodiment of the present invention.

FIG. 9 is a flowchart (part 1) showing an operation of the base station apparatus according to the embodiment of the present invention.

FIG. 10 is a flowchart (2) showing an operation of the base station apparatus according to the embodiment of the present invention.

FIG. 11 is a flowchart (part 3) illustrating an operation of the base station apparatus according to the embodiment of the present invention.

FIG. 12 is a diagram showing a main part of a conventional protocol in the case of a call failure between a mobile station device and a base station device.

FIG. 13 is a diagram showing a main part of a conventional protocol in a case where a call is successfully made between a mobile station device and a base station device.

FIG. 14 is a flowchart (part 1) showing an operation of a conventional mobile station device.

FIG. 15 is a flowchart (2) showing the operation of the conventional mobile station device.

FIG. 16 is a flowchart (part 1) showing the operation of the conventional base station apparatus.

FIG. 17 is a flowchart (part 2) showing the operation of the conventional base station apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Instruction means 2 Link channel assignment request transmission means 3 Standby means 4 Notification means 5 Storage means 6 Link channel assignment rejection transmission means 7 Notification means 11, 21 Antenna 12, 22 Radio unit 13, 23 Signal processing unit 14, 24 CPU 15 Signal Processing unit 16 Display unit 17 Operation unit 18 Speaker 25 Memory unit 26 Line interface unit

Claims (6)

[Claims] 1. A mobile station apparatus for communicating with another apparatus via a base station apparatus, comprising: instruction means for instructing a call with recall designation, and said instruction means in response to an instruction from said instruction means. Link channel assignment request sending means for sending a link channel assignment request with recall designation to the base station device; and the base station in response to the link channel assignment request with recall designation sent by the link channel assignment request generation means. A standby unit for notifying that link channel allocation is not possible when information of link channel allocation rejection is sent from the station device; and a standby channel that can be allocated by the base station device during standby by the standby unit. And a notifying unit for notifying that the link channel has been allocated when the above information is transmitted. 2. A base station apparatus for controlling communication between a mobile station apparatus and another apparatus, wherein said storage means stores information that a link channel assignment request with recalling designation has been sent from said mobile station apparatus. Link channel assignment rejection transmitting means for transmitting link channel assignment rejection information to the mobile station device when the information channel for transmitting / receiving information is unavailable, and the information channel has become usable In this case, if it is stored in the storage means that a link channel assignment request with a recalling designation has been sent, a notifying means for notifying the mobile station apparatus that link channel assignment is enabled, A base station device comprising: 3. A mobile communication system for performing communication between a mobile station device and another device via a base station device, wherein the mobile station device includes instruction means for instructing a call with recall designation. Link channel assignment request transmission means for transmitting a link channel assignment request with recall designation to the base station apparatus in accordance with the instruction of the indication means; and retransmission call designation transmitted by the link channel assignment request generation means. When information of link channel assignment rejection is sent from the base station apparatus in response to the link channel assignment request, a standby unit for notifying that link channel allocation cannot be performed and waiting; And notifying means for notifying that link channel allocation has been enabled when information on link channel allocation is received from the base station apparatus. A station device for storing that a link channel assignment request with a re-call designation has been sent from the mobile station device; and a link channel when an information channel for transmitting and receiving information is unavailable. Link channel assignment rejection transmitting means for transmitting assignment rejection information to the mobile station device; and when the information channel becomes available, a link channel assignment request with recall designation is sent to the storage means. Notification means for notifying the mobile station device that link channel allocation has been enabled, if the mobile station device has been stored. 4. A mobile communication method for performing communication between a mobile station device and another device via a base station device, wherein the mobile station device sends a link channel assignment request with re-call designation to the base station device. The base station apparatus, which has received the link channel assignment request with recall designation, stores that there is a link channel assignment request with recall designation, and uses an information channel for transmitting and receiving information. If it is not possible, the mobile station apparatus transmits link channel assignment rejection information to the mobile station apparatus, and the mobile station apparatus receiving the link channel assignment rejection information notifies that link channel allocation cannot be performed, and waits. When the information channel becomes available, if it is stored that there is a link channel assignment request with a recalling designation, the base station apparatus can assign the link channel. Notifying the mobile station apparatus that is waiting that the mobile station apparatus is waiting, the mobile station apparatus that is waiting to receive the information that the link channel allocation is enabled, notifies that the link channel allocation is enabled, Mobile communication method. 5. When there is a call from another device to the mobile station device, the base station device causes the mobile station device to perform communication between the mobile station device and the other device. 5. The mobile communication method according to claim 4, wherein the mobile station apparatus and the other apparatus perform communication using the information channel used for the communication after the completion. 6. When the mobile station apparatus performs a handover, the mobile station apparatus synchronizes with the handover destination base station apparatus, and requests the base station apparatus to assign a link channel with recall designation. The mobile communication method according to claim 4 or 5, wherein the mobile communication method automatically transmits to the base station apparatus.