JP2002051376A - Call signal transmission method and device in mobile communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid aborted call signals, by a method in which the call signals are set to be managed in the order of priority and changed in transmission order, and the transmission of call signals occurring at random is averaged temporally at a base station. SOLUTION: Call signals are divided in two groups, one is voice call signals (hereafter referred to as PCHV), that are required to be sent and responded instantaneously, and the other is data-call signals (hereafter referred to as PCHP), that are not required to be sent and responded instantaneously. At a base station 100, an immediate buffer 111 and a non-immediate buffer 112 are prepared, and signals from a control station 200 are received. A decision part 113 stores the received signals in the buffer 111 is they are PCHB or in the buffer 112, if they are PCHP. Successively, PCHV are sent preferentially to a mobile station 300 from the real-time buffer 111. When a wireless section is idle, PCHP are sent to the mobile station 300 from the non-immediate buffer 112.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a paging signal transmission method and apparatus in a mobile communication system, and more particularly, to a paging signal transmission method and apparatus in a mobile communication system transmitting paging signals having different characteristics.

[0002]

2. Description of the Related Art First, a P service currently provided in Japan.
A paging signal transmission method in a DC (Personal Digital Cellular) method will be described.

FIG. 4 is a diagram for explaining a conventional paging signal transmission method.

In FIG. 1, a voice call signal is represented by PCHV, and a data call signal is represented by PCHP. Since the incoming call to the mobile station occurs at random, the exchange station transmits a paging signal to the control station at random. The control station transmits the paging signal to the base station, and the base station converts the received paging signal into a radio signal and transmits the radio signal to the mobile station. At this time, the voice call signal and the data call signal are collectively managed and transmitted to the mobile station in the order of reception from the control station. Next, a paging signal processing method in the base station will be described.

FIG. 5 is a diagram for explaining a conventional paging signal processing method.

[0006] When the base station 10 receives the call signal from the control station 20, the base station 10 stores the call signal in the buffering unit 11 inside the base station 10. The buffering unit 11 passes the stored call signals to the wireless modulation / demodulation unit 12 in the order stored at each predetermined timing and transmits the signals to the wireless section. P
In the DC system, one frame period is 40 ms (six-slot configuration), 20 ms (three-slot configuration) is defined as a subframe period in a frame, and one superframe period is 720 ms. Since the paging signal is transmitted only in a specific time slot as shown in FIG.
A paging signal is transmitted every superframe (720 ms). In the example of FIG. 4 and FIG. 5, the exchange office sends PCHP1 PCHP2 PCHV1 PCH
It is assumed that the paging signal is transmitted to the control station in the order of V2 PCHV3 PCHP3. The control station 20 transmits the call signal to the base station 10 in the same order. Inside the base station, the call signal is stored in the buffering unit 11 at a time, and the call signal is passed to the radio modulation / demodulation unit 12. The wireless modem 12 performs the same order, PCHP1 PCHP2 PCHV1 PCH
A call signal is transmitted to the mobile station by V2 PCHV3 PCHP3.

[0007]

However, in the above-mentioned conventional technique, a plurality of paging signals having different properties are randomly generated in the exchange, and transmitted in the order in which the control station and the base station receive the signals from the exchange. For this reason, the call signal is generated at random because of random occurrence, and when a large number of calls are instantaneously generated, the call signals cannot be stored in a finite number of buffers and may not be transmitted to a wireless section. As an example, the problem in the above-described conventional technique will be described under the condition that the number of buffers is four, and the number of paging signals transmitted to the wireless modem in one superframe is two. FIG. 7 is a diagram for explaining a conventional problem.

<Super frame 1> The paging signal is PCHP1 PCHV1 PCHP2 PCH
The base station receives from the control station in the order of V2PCHP3 and stores it in the buffer in the same order. However, the signal of PCHP3 cannot be stored in the buffer and is discarded. Then, the first two signals PCHP1 PCHV1 of the buffer are transmitted to the radio section.

<Super frame 2> The call signal is PCHV3 PCHP4 PCHV4 PCH
The base station receives from the control station in the order of P5 PCHV5 PCHV6 PCHP6 and stores it in the buffer in the same order. However, it cannot be stored in the buffer, and PCHV4 PCHP5 PCHV5 PCH
The signal of V6 PCHP6 is discarded. Then, the first two signals PCHP2 PCHV2 of the buffer are transmitted to the radio section.

<Superframe 3> Since there is no paging signal, the first two signals PCHV3PCHP4 of the buffer are transmitted to the radio section.

<Superframe 4> There is no call signal,
Nothing is transmitted because there is no signal in the buffer.

In the operation example of FIG. 7, superframe 1: PCHP3 superframe 2: PCHV4 PCHP5
PCHV5 PCHV6 PCHP6 is a paging signal that is discarded because there is no free space in the buffer and cannot be stored, and is not transmitted to the mobile station.

[0013] Increasing the number of buffers reduces the number of call signals that are not stored in the buffer and are discarded. However, since the number of paging signals that can be transmitted for each superframe is limited, it takes time until the paging signal stored at the end of the buffer is transmitted, and as a result, the response from the mobile station is delayed, and real-time paging is performed. In some cases, a response signal of the signal is not accepted by the exchange. Therefore, it is not always possible to avoid discarding the call signal by simply increasing the number of buffers.

The present invention has been made in view of the above points, and provides a paging signal transmission method and apparatus in a mobile communication system capable of reducing the number of discarded paging signals without increasing the number of buffers. With the goal.

[0015]

Means for Solving the Problems The present invention (claim 1) provides:
A paging signal transmission method in a mobile communication system in which a plurality of paging signals having different properties are randomly generated in a switching station and the paging signal is transmitted to the mobile station via the control station and the base station. The paging signal is separately managed according to the properties of the received paging signal, and the paging signal generated at random is temporally averaged and transmitted to the mobile station.

According to the present invention (Claim 2), a priority is given to a paging signal that is managed separately, and the paging signal is transmitted to the mobile station in the descending order of the priority. At a certain point, a lower priority call signal is transmitted.

According to the present invention (claim 3), a paging signal having a high priority is a signal requiring real-time transmission and response, and a paging signal having a low priority is not required to be transmitted in real time. A paging signal that does not require a response.

The present invention (Claim 4) provides a paging system in a mobile communication system in which a plurality of paging signals having different properties are randomly generated in an exchange, and the paging signals are transmitted to a mobile station via a control station and a base station. A signal transmitting device, comprising: buffering means for separately managing the paging signal according to the nature of the paging signal received from the control station; and transmitting means for temporally averaging a randomly generated paging signal and transmitting the averaged paging signal to the mobile station. Having.

According to the present invention (claim 5), the buffering means has priority order assigning means for assigning a priority to the paging signal managed separately, and the transmitting means calls the calling signal in descending order of priority. Means for transmitting a signal to the mobile station and transmitting a low-priority paging signal at some point in the sky in a wireless space with little traffic;

According to the present invention (claim 6), in the buffering means, a signal requiring real-time transmission and response is set to a call signal having a high priority order, and it is not necessary to transmit the signal in real time. Signal determining means for determining a no-call signal as a low-priority call signal.

Conventionally, a plurality of paging signals having different properties are generated at random and the paging signals are discarded because the paging signal transmissions are not averaged over time. For example, the paging signal is separately managed for each property in the base station, priorities are assigned, the transmission order is changed, and the paging signal transmission generated at random is temporally averaged, thereby avoiding the discard of the paging signal. It becomes possible.
In other words, in a mobile communication system, a paging signal is stored in separate buffers for a voice paging signal requiring a response and a data paging signal requiring no real-time response, and the voice paging signal is transmitted preferentially. This makes it possible to avoid discarding the signal.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention separately manages paging signals for each property in a base station, assigns priorities, changes the transmission order, and averages out the transmission of randomly generated paging signals over time. This avoids discarding the call signal.

Here, for example, a voice call signal (hereinafter, PCHV) requiring a signal transmission / response in real time as a call signal having different properties, and a data call signal (hereinafter, referred to as PCHV) not requiring signal transmission / response in real time. PCH
A mobile communication system having two types of call signals P) will be described.

FIG. 1 shows a configuration of a paging signal transmission system in a mobile communication system according to the present invention. The configuration shown in FIG. 1 includes a base station 100, a control station 200, and a mobile station 300.

The base station 100 includes a buffering unit 110
And a wireless modem unit 120. The buffering unit 110 includes a real-time buffer 111 that stores a voice call signal (PCHV) that requires signal transmission and response in real time, and a buffer that stores a data call signal (PCHP) that does not require signal transmission and response in real time. A real-time buffer 112 and a determination unit 113 for determining whether the received call signal is one of these two types of signals.
Consists of

FIG. 2 is a flowchart of the operation of the base station according to the present invention.

Step 101) In the base station 100, two buffers, a real-time buffer 111 and a non-real-time buffer 112, are prepared in the buffering unit 110, and a signal is received from the control station 200.

Step 102) If the received signal is PCH
The determination unit 113 determines whether the signal is V or PCHP. If the signal is PCHV, the process proceeds to step 103. If the signal is PCHP, the process proceeds to step 104.

Step 103) The PCHV is stored in the real-time buffer 111, and the process proceeds to step 105.

Step 104) The PCHP stores the non-real time buffer 112 in the non-real time buffer 112 and proceeds to step 106.

Step 105) PCHV is preferentially transmitted from the real-time buffer 111 to the mobile station 300, and PCHP is postponed.

Step 106) It is determined whether the PCHV is reduced and the wireless section is vacant. If not, the process proceeds to step 105 to continue the process of transmitting the PCHV to the mobile station 300.

Step 107) If a vacancy is created in the wireless section, the PCHP is stored in the non-real-time buffer 111.
To the mobile station 300.

In the above processing, the PCHP signal transmission / response is delayed as compared with the prior art, but is not a problem because it is a non-real-time paging signal. Therefore, unlike the case where the number of buffers is simply increased, the phenomenon that the response signal of the real-time paging signal cannot be accepted by the exchange is reduced.

By performing the above control, the transmission of the randomly generated paging signal is temporally averaged to avoid discarding the paging signal.

[0036]

Embodiments of the present invention will be described below with reference to the drawings.

In the following description, the number of real-time buffers and the number of non-real-time buffers are assumed to be 4 and 6, respectively. The number of real-time buffers: 4 The number of non-real-time buffers: 6 The radio modulation / demodulation unit in one superframe The number of call signals to be transmitted to 120: 2 signals will be described with reference to FIG.

<Superframe A> The call signal is PCHP1 PCHV1 PCHP2 PCH
The base station 100 receives from the control station 200 in the order of V2 PCHP3 and manages the call signal separately. Real-time buffer: PCHV1 PCHV2 Non-real-time buffer: PCHP1 PCHP
2 PCHP3. Then, the first two signals PCHV1 PCHV2 of the real-time buffer 111 are transmitted to the wireless section.

<Superframe B> The paging signal is PCHV3 PCHP4 PCHV4 PCH
The base station 100 receives from the control station 200 in the order of P5 PCHV5 PCHV6 PCHP6, separately manages a call signal, and a buffer for real time: PCHV3 PCHV4
PCHV5 PCHV6 Non-real-time buffer: PCHP1 PCHP
2 PCHP3 PCHP4 is stored. Then, the first two signals PCHV3 and PCHV4 of the real-time buffer 111 are transmitted to the wireless section.

<Superframe C> Since there is no call signal, the first two signals PCHV5 and PCHV6 of the real-time buffer 111 are transmitted to the radio section.

<Superframe D> Since there is no paging signal and there is no paging signal in the real-time buffer 111, the first two signals PCHP1 and PCHP2 of the non-real-time buffer 112 are transmitted to the radio section.

<Superframe E> Since there is no paging signal and no paging signal in the real-time buffer 111, the first two signals PCHP3 PCHP4 of the non-real-time buffer 112 are transmitted to the radio section.

As described above, by transmitting the real-time paging signal preferentially and postponing the non-real-time paging signal, the transmission of the randomly generated paging signal is temporally averaged, and the conventional paging signal is generated. It is possible to avoid discarding the call signal.

It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified and applied within the scope of the claims.

[0045]

As described above, according to the present invention, the transmission of a paging signal which is randomly generated is temporally averaged, the discard of the paging signal is reduced, and the paging signal is transmitted to the radio section efficiently. It becomes possible.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a paging signal transmission system in a mobile communication system of the present invention.

FIG. 2 is a flowchart of the operation of the base station of the present invention.

FIG. 3 is a diagram for explaining a call signal transmission system according to one embodiment of the present invention.

FIG. 4 is a diagram for explaining a conventional paging signal transmission method.

FIG. 5 is a diagram for explaining a conventional paging signal processing method.

FIG. 6 is a diagram showing a timing of transmitting a paging signal within one superframe according to the related art.

FIG. 7 is a diagram for explaining a conventional problem.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 base station 110 buffering unit 111 real-time buffer 112 non-real-time buffer 113 determination unit 120 radio modulation / demodulation unit 200 control station 300 mobile station

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazunori Obata 2-1-1, Nagatacho, Chiyoda-ku, Tokyo F-term in NTT Docomo (reference) 5K067 AA25 BB04 DD13 DD24 DD51 EE02 EE10 EE16 FF02 GG11 HH23 JJ12 JJ17 KK15

Claims (6)

[Claims] 1. A paging signal transmission method in a mobile communication system in which a plurality of paging signals having different properties are randomly generated in an exchange, and the paging signals are transmitted to a mobile station via a control station and a base station. A mobile communication system, wherein the station manages the paging signal separately according to the nature of the paging signal received from the control station, and averages the randomly generated paging signal over time and transmits the averaged paging signal to the mobile station. Paging signal transmission method. 2. A priority is given to the paging signal which is separately managed, and the paging signal is transmitted to the mobile station in the descending order of the priority, and when the paging signal is empty in a radio space where traffic is small. The paging signal transmission method in a mobile communication system according to claim 1, wherein the paging signal having a lower priority is transmitted. 3. The paging signal having a higher priority is a signal requiring real-time transmission and response, and the paging signal having a lower priority is not required to be transmitted in real time and does not require a response. Claim 2 which is a calling signal
A paging signal transmission method in the mobile communication system according to the above. 4. A paging signal transmitting apparatus in a mobile communication system in which a plurality of paging signals having different properties are randomly generated in an exchange, and the paging signals are transmitted to the mobile station via a control station and a base station. Buffering means for separately managing the paging signal according to the nature of the paging signal received from the control station; and transmission means for temporally averaging the randomly generated paging signal and transmitting the averaged paging signal to the mobile station. A paging signal transmitting apparatus in a mobile communication system. 5. The buffering means includes priority order assigning means for assigning a priority to the separately managed paging signal, and the transmitting means comprises: the paging signal in descending order of the priority. 5. The paging signal transmitting apparatus according to claim 4, further comprising means for transmitting the paging signal to the mobile station, and transmitting the paging signal having a low priority when there is an empty space in a radio space with little traffic. 6. The buffering means sets a signal requiring a real-time transmission and a response to a paging signal having a high priority order, and generates a paging signal which does not need to be transmitted in real time and which does not require a response. The paging signal transmitting apparatus in a mobile communication system according to claim 5, further comprising signal determination means for determining a paging signal having a low priority.