JP3056138B2 - Incoming call system for mobile phone systems - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an incoming call system for a portable telephone system which ensures the establishment of synchronization with a radio base station and improves the incoming call rate.

[0002]

2. Description of the Related Art As a conventional portable telephone system, for example, there is one disclosed in Japanese Patent Application Laid-Open No. H5-252093. This is because a radio base station apparatus as a fixed station periodically transmits an annunciation signal in a fixed-period time slot, and a mobile station apparatus first receives an annunciation signal in a continuous reception mode, and a built-in reception cycle setting timer. After that, the receiver is driven for a fixed period of time slot in the non-continuous reception mode, and when the loss of synchronization is detected, the receiver is switched to the continuous reception mode to facilitate the reception of the broadcast signal. It is.

When the mobile station apparatus receives a radio wave by operating the receiving unit intermittently, the synchronization management timer of each mobile station apparatus is prevented from becoming out of synchronization, and the power of the mobile station apparatus is reduced. The consumption can be reduced. The mobile station apparatus performs intermittent reception in the discontinuous reception mode by using a timer in the mobile station.

FIG. 2 shows another conventional portable telephone system. This is a mobile station apparatus 1 that performs intermittent reception, a private branch exchange apparatus 2 that manages the area where the mobile station apparatus 1 is located and performs call processing, and a conversion between a private line and wireless of the private branch exchange apparatus 2 side. (Exchange), one or more radio base station apparatuses 3 are connected to the private branch exchange apparatus 2, and one or more mobile station apparatuses are connected to these radio base station apparatuses 3. 1 is in service.

In this portable telephone system, as shown in FIG. 3, the paging signal from the private branch exchange 2 causes the radio base station 3 to output one paging signal to the mobile station 1, and The radio unit of the station apparatus 1 is operated intermittently, and upon receiving the report signal of the incoming call state from the mobile station apparatus 1, the radio base station apparatus 3 returns a response to the private branch exchange apparatus 2 within a predetermined time, and if necessary. Such an operation is repeated. The mobile station apparatus 1 is called when the private branch exchange apparatus 2 generates a ringing tone.

[0006]

However, in the conventional portable telephone system described in the above publication, in the discontinuous reception mode, an incoming call to the own station is intermittently performed by a timer in the mobile station apparatus. There has been a problem that the radio base station apparatus cannot know whether or not the mobile station apparatus has established synchronization, and the incoming call rate decreases.

[0007] In the portable telephone system shown in FIG.
Since one paging signal is transmitted by one paging, the mobile station apparatus may not be able to synchronize with the paging signal in intermittent reception operation. In this case, a call may be lost and the power may be turned off. There is a problem that a mobile station device that is out of range or a mobile station device that is out of range cannot be reliably received.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and prevents a call loss from occurring while suppressing useless call processing such as repetition of a call or a redial of a call. It is an object of the present invention to obtain an incoming call system for a mobile phone system that can improve the incoming call rate and transmission efficiency.

[0009]

In order to achieve the above-mentioned object, the incoming call system of the portable telephone system according to the first aspect of the present invention comprises:
Causing the wireless base station device to perform grouping of mobile station devices by a unique number of the mobile station device coupled to the wireless base station by a radio wave,
By transmitting a paging signal for calling a specific mobile station device for each group, the radio section of the mobile station device is operated intermittently, and the paging signal is repeatedly transmitted to the radio base station device within a preset time. When you make it
In both cases, a paging signal is sent to the radio base station apparatus.
The return transmission timing is determined by the call processing of the private branch exchange.
It is made to be set to .

[0010]

According to a second aspect of the present invention, in the terminating system for a portable telephone system, a response time from a radio base station set in the private branch exchange is adjusted to a ringing tone time in the private branch exchange. It is like that.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a communication sequence diagram showing an incoming call system of the portable telephone system of the present invention. In FIG. The station device 3 is a wireless base station device that performs conversion between a private extension and wireless communication.

The radio base station apparatus 3 divides the mobile station apparatuses 1 into groups according to the unique numbers of the mobile station apparatuses 1, and outputs a paging signal for calling a specific mobile station apparatus 1 for each of these groups. 1 and the radio section (not shown) of the mobile station apparatus 1 is operated intermittently. Further, the radio base station apparatus 3 has a timer (not shown) for repeatedly transmitting the paging signal within a preset time. The transmission timing by this timer is set for each call processing by the private branch exchange device 2.

Next, an incoming call procedure of this portable telephone system will be described. Now, assuming that there is an incoming call to the mobile station apparatus 1 located within a specific private branch exchange apparatus 2, the private branch exchange apparatus 2 calls the wireless base station apparatus 3 located at the same time as the call. And transmits a ring back tone (RBT) to the calling side. At this time, the private branch exchange apparatus 2 sets in advance a time for waiting for a response to this call using a timer.

The radio base station apparatus 3 that has received the call from the private branch exchange apparatus 2 repeatedly transmits a paging signal to the mobile station apparatus 1 within a time set by a timer provided therein. Note that when the timer times out after the set time, the transmission of the paging signal is immediately stopped.

For this reason, the mobile station device 1 that performs intermittent reception
Starts receiving the paging signal at a timing set by a timer in its own station, and transmits an incoming state report signal to the wireless base station device 3 after a lapse of time set by the wireless base station device 3 . For this reason, the wireless base station device 2
Receives the report of the incoming call, returns a response to the private branch exchange device 2, and if a response is received within a timeout period for a response preset in the private branch exchange device 2, the response timing is timed out. As the top, the call processing is repeated again, and the same operation as described above is executed.

The time (timeout time) for waiting for a response set by the private branch exchange apparatus 2 is set to, for example, 3 seconds in accordance with the ringing tone time, and the repetition of the call due to the timeout is performed once. this is,
When the power of the mobile station apparatus 1 is turned off or when the mobile station apparatus 1
This is to prevent a caller who has made a call to the mobile station apparatus 1 from waiting for a response for a long time when is outside the service area.

Further, the time set by the timer in the radio base station apparatus 3 is set to, for example, about 3 seconds for enabling transmission of a paging signal as much as possible in order to ensure that the mobile station apparatus 1 receives one call. Is preferred.

[0019]

As described above, according to the present invention, the radio base station apparatus is divided into groups of mobile station apparatuses by the numbers unique to the mobile station apparatuses, which are coupled to each other by radio waves. By transmitting a paging signal for calling a specific mobile station apparatus, the radio unit of the mobile station apparatus is operated intermittently, and the paging signal is repeatedly transmitted to the radio base station apparatus within a preset time. Therefore, it is possible to prevent the occurrence of a call loss while suppressing useless call processing such as repetition of calls and redialing a call, and as a result, it is possible to improve the incoming call rate and transmission efficiency in the mobile station device. Can be

[Brief description of the drawings]

FIG. 1 is a communication sequence diagram showing an incoming call system of a mobile phone system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a general mobile phone system.

FIG. 3 is a communication sequence diagram showing an incoming call system of a conventional mobile phone system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mobile station apparatus 2 Private branch exchange apparatus 3 Radio base station apparatus

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04B 7/26 H04Q ⁷ /04-7/38

Claims (2)

(57) [Claims] 1. A radio base station apparatus divides mobile station apparatuses into groups according to a number unique to the mobile station apparatus, and transmits a paging signal for calling a specific mobile station apparatus for each group. doing, the incoming system of a mobile telephone system for intermittently operating the radio section of the mobile station apparatus, the radio base station apparatus, is repetitively transmitted in the time set the paging signal in advance, the radio base station apparatus Sends paging signal repeatedly
Is set for each call processing of the private branch exchange.
An incoming call system for a mobile phone system, characterized in that: 2. A mobile telephone system according to claim 1, characterized in that the response time from the radio base station apparatus set by the private branch exchange station, adapted to the ringing tone time in the private branch exchange station Incoming method.