JP2760309B2 - Communication connection method of mobile communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention is applied to a mobile communication system. The present invention is used for outgoing or incoming call control. The present invention is suitable for use in a mobile communication system constituted by small wireless zones. In particular, the present invention relates to a technology for reducing a call connection time.

[0002]

2. Description of the Related Art In a conventional communication connection method of a mobile communication system, a radio base station reports control channel information of a peripheral radio zone to a mobile station. The mobile station first transmits a communication connection request to the radio base station through the control channel. At this time, the mobile station also reports the reception level of the peripheral radio zone having the reception level that can be accessed simultaneously. The base station controller recognizes the call request from the mobile station and returns a communication connection acceptance if the wireless base station receiving the call request has an available channel, and thereafter,
Upon completion of the authentication request and other transmission and reception, an instruction to shift to a traffic channel is issued, and a call on the traffic channel is established. However, if there is no vacant channel, the communication connection acceptance is not returned, a vacant channel is searched for from the accessible peripheral wireless zone reported from the mobile station, and an instruction is made to recall from the radio base station having the vacant channel. The process ends. The mobile station sends a new communication connection request to the designated wireless base station (Reference: Foundation
Published by Radio System Development Center, digital car phone system standard (RCR STD-27B).

[0003]

As described above, in the prior art, when a request for communication connection is received, the base station controller can instruct that a request for communication connection be made again from the peripheral wireless zone if there is no available channel. However, if the mobile station moves to one of the peripheral wireless zones before the communication connection and becomes in a communication disabled state, it is determined that the communication connection processing has abnormally ended, and the processing ends. Therefore, the mobile station has to perform the communication connection process from the beginning at the wireless base station of the destination wireless zone, and there is a disadvantage that the time until the communication state is long is long.

The present invention has been made in view of such a background, and an object of the present invention is to provide a communication connection method of a mobile communication system capable of shortening a communication connection time. An object of the present invention is to provide a communication connection method of a mobile communication system suitable for use in mobile communication moving in a small wireless zone.

[0005]

According to a first aspect of the present invention, when a mobile station is in a state where it can receive signals from a plurality of radio base stations, the mobile station receives signals from the plurality of radio base stations. A communication connection process between a first step of making a communication request to a radio base station transmitting a signal of the maximum level among the signals of the above and a radio base station transmitting the signal of the maximum level in response to the communication request And a second step of transmitting and receiving a signal related to the mobile communication method.

Here, a feature of the present invention is that, in the first step, the mobile station receives a signal from a radio base station capable of receiving signals other than the radio base station transmitting the signal of the maximum level. Also, when the communication with the wireless base station transmitting the signal of the maximum level becomes impossible in the course of the communication connection, a signal from the receivable wireless base station is received. When a signal from the receivable wireless base station includes a communication connection processing continuation instruction signal, the communication connection processing is to be continued with the wireless base station that transmitted the instruction signal.

[0007] The first aspect of the present invention relates to a radio base station. The feature of the present invention is that information on other radio base stations with which the mobile station can communicate with this communication request is also added. Receiving, when the signal from the mobile station cannot be received in the course of the communication connection processing, the communication connection processing is interrupted along with the information on the other radio base station to the base station controller. To notify.

[0008] The first aspect of the present invention is characterized in that a base station control apparatus is characterized in that the base station control apparatus instructs the other radio base station to continuously execute communication connection processing. Where you do it.

When the first aspect of the present invention is described with respect to another radio base station, the feature is that the other radio base station instructs the base station control device to continuously execute the communication connection processing. Then, a communication connection processing continuation instruction signal is transmitted to the mobile station, and when a response is received from the mobile station, the communication connection processing is continued.

A second aspect of the present invention is a radio base station that transmits a signal of the maximum level among signals from a plurality of radio base stations when signals from the plurality of radio base stations are receivable. And a means for making a communication request to the radio base station, and means for transmitting and receiving a signal relating to communication connection processing between the radio base station transmitting the signal of the maximum level in response to the communication request. It is a mobile station device.

Here, a feature of the present invention is that, at the time of the communication request, information on signal reception sensitivity from a receivable radio base station other than the radio base station transmitting the signal of the maximum level is also transmitted. Means, when communication between the wireless base station transmitting the signal of the maximum level is disabled in the course of communication connection, receive a signal from the receivable radio base station, the receivable When a signal from the wireless base station includes a communication connection processing continuation instruction signal, there is provided means for continuing communication connection processing with the wireless base station that transmitted the instruction signal.

[0012]

When a mobile station makes a communication request to a radio base station, it indicates a plurality of peripheral radio zones in which communication is possible together with this communication request. Thereby, for example, the base station control device can obtain candidate information of a wireless zone with which this mobile station can communicate.

When it is detected that communication with the mobile station, which has made a communication request until the mobile station and the radio base station are communicatively connected, becomes impossible, the radio base station receiving the communication request receives the communication request. The mobile station is notified that any one of the wireless base stations in the peripheral wireless zone will continue the communication connection process. Further, a communication connection processing continuation signal is repeatedly transmitted from wireless base stations in a plurality of communicable peripheral wireless zones. As a result, the mobile station can receive the communication connection process by the new wireless base station while holding the temporarily interrupted communication request procedure.

As a procedure, when the mobile station is instructed to continue the communication connection process from the radio base station which has requested the communication,
This mobile station synchronizes with the radio base station having the highest reception level among a plurality of communicable peripheral radio zones and continues the communication connection processing.

Thus, even if the mobile station loses communication with the radio base station during the communication connection processing, the mobile station can start the communication connection processing that is currently being performed by a radio base station in a newly communicable wireless zone. Can be resumed. Therefore, there is no need to restart the communication connection processing from the beginning, and the communication connection processing time can be reduced.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. FIG. 1 is an overall configuration diagram of a mobile communication system to which an embodiment of the present invention is applied. The mobile station 2 is moving from the wireless zone 6 of the wireless base station 3 to the wireless zone 8 of the wireless base station 5.

The present invention relates to a radio base station for transmitting a signal of the maximum level among signals from the radio base stations 3 to 5 when the mobile station 2 is in a state capable of receiving signals from the radio base stations 3 to 5. A first step of making a communication request to station 3;
A second step of transmitting and receiving a signal relating to communication connection processing to and from the wireless base station 3 transmitting the signal of the maximum level in response to the communication request.

Here, a feature of the present invention is that, in the first step, the mobile station 2 receives signals from the receivable radio base stations 4 and 5 other than the radio base station 3 transmitting the signal of the maximum level. When the communication with the radio base station 3 transmitting the signal of the maximum level becomes impossible in the course of the communication connection, the receivable radio base station 4 is transmitted. Or, when a signal from the wireless base station 4 or 5 that can receive a signal includes a communication connection processing continuation instruction signal, the communication with the wireless base station 5 that transmitted the instruction signal is performed. The connection process is to be continued.

In the present invention, the radio base station 3 transmits another radio base station 4 with which the mobile station 2 can communicate according to the communication request.
Or when information about the other radio base station 4 or 5 is received from the base station controller 1 when the signal from the mobile station 2 cannot be received in the course of this communication connection processing. A notification that the communication connection process is interrupted along with the information is provided.

In the present invention, the base station controller 1 instructs another radio base station 4 or 5 to continue the communication connection process.

In the present invention, another radio base station 4 or 5
Transmits a communication connection process continuation instruction signal to the mobile station 2 when instructed by the base station control device 1 to continue the communication connection process, and when a response is received from the mobile station 2, The communication connection process is continuously performed.

Next, the configuration of the mobile station will be described with reference to FIG. FIG. 2 is a block diagram of the mobile station apparatus.
The present invention relates to a radio base station 3 that transmits a signal of the highest level among signals from a plurality of radio base stations 3 to 5 when signals from the plurality of radio base stations 3 to 5 are receivable.
And a means for transmitting and receiving a signal related to a communication connection process between the wireless base station 3 and the wireless base station 3 transmitting the signal of the maximum level in response to the communication request. This is a mobile station device including a communication control unit 10.

Here, the feature of the present invention resides in that information on signal reception sensitivity from a receivable radio base station 4 or 5 other than the radio base station 3 transmitting the signal of the maximum level at the time of the communication request. When communication between the means for transmitting the signal and the radio base station 3 for transmitting the signal of the maximum level during the communication connection is disabled, the signal from the receivable radio base station 4 or 5 is transmitted. Is received, and when a signal from the receivable radio base station 4 or 5 includes a communication connection processing continuation instruction signal, the communication connection processing is continued with the radio base station 5 that has transmitted the instruction signal. The communication control unit 10 is provided with the means.

Next, the operation of the embodiment of the present invention will be described with reference to FIGS. 3 and 4 are diagrams showing the sequence of the embodiment of the present invention. The mobile communication system shown in FIG. 1 includes a base station control station 1 and a plurality of wireless base stations 3 to 5. It is assumed that a call is made when the mobile station 2 is near the boundary between the wireless zones 6, 7, and 8. The mobile station 2 measures the reception level at this time, and if the maximum reception level is accessible in the wireless zone 6 and the reception levels are in the wireless zone 7 and the wireless zone 8, as shown in FIG. A request for communication connection is made to S3 (S1), and the wireless zone numbers of the wireless zones 7 and 8 and the respective reception levels are reported as peripheral wireless zone information. The wireless base station 3 transfers a communication connection request including the peripheral wireless zone information from the mobile station 2 to the base station controller 1 (S2). In response to this, the base station controller 1 stores the accessible wireless zones 7 and 8 of the mobile station 2 in a storage device, activates a communication connection process, and sends out a communication connection acceptance to the wireless base station 3 (S
3). The wireless base station 3 transmits a communication connection acceptance (S4),
When the reception by the mobile station 2 is confirmed by the radio base station 3, the base station control device 1 transmits a call sequence (2).
(E.g., an authentication request signal for confirming whether the mobile station is compatible with the system).
5). The calling sequence (2) is transmitted to the mobile station 2 (S6). The answer is returned to the wireless base station 3 (S
7) Then, it is returned to the base station controller 1 (S8).
Further, the calling sequence (3) is transferred from the base station control device 1 to the wireless base station 3 (S9).

Here, when the mobile station 2 moves out of the radio zone 6 and moves to the radio zone 8 and cannot receive a signal from the radio base station 3, the reception level of the mobile station 2 in the radio base station 3 deteriorates. Therefore, it is detected that communication with the mobile station 2 has been disabled (S10). For this reason, the radio base station 3 sends the received electric field deterioration report of the mobile station 2 to the base station controller 1 (S11).

The base station controller 1 instructs the wireless base station 3 to transmit a communication connection processing continuation instruction (S12), and the wireless base station 3 transmits this to the mobile station 2 (S13). at the same time,
The base station control device 1 reads the accessible wireless zones 7 and 8 of the mobile station 2 from the storage device to select a destination candidate of the mobile station 2.
And instruct the wireless base stations 4 and 5 to transmit a communication connection processing continuation signal (S14). The wireless base stations 4 and 5 repeatedly transmit the communication connection processing continuation instruction signal (S15, S1
6) Wait for reception of a communication connection processing continuation response signal from the mobile station 2. When there is a communication connection processing continuation response from the mobile station 2 (S20), this is notified to the base station controller 1 (S2).
1). In response to this, the base station controller 1 instructs the wireless base station 5 to transmit the outgoing call sequence (3) which has been interrupted halfway (S22). The wireless base station 5 sends the calling sequence (3) to the mobile station 2 (S23). A reply to the calling sequence (3) from the mobile station 2 to the radio base station 5 is received by the radio base station 5 (S24). At this time,
If the wireless base station 4 has still transmitted the communication connection processing ongoing signal (S25), the base station control device 1 instructs the base station device 4 to stop transmitting the ongoing signal (S26).

Further, a calling sequence (n) required for communication connection is exchanged between the radio base station 5 and the mobile station 2 (S27, S28), and when the procedure is completed, a call is started (S29). .

Here, the purpose of the communication connection processing continuation instruction signal is that although the mobile station 2 has moved, it is impossible to transmit and receive signals in the direction 3 from the mobile station 2 to the radio base station, but as shown in FIG. When the signal can be transmitted / received in the direction from the mobile station 2 to the mobile station 2, the mobile station 2 instructs the radio base station 4 or 5 to synchronize immediately.

In FIG. 3, since the base station controller 1 cannot determine which direction has become impossible to transmit or receive first, a communication connection processing continuation instruction signal is transmitted in consideration of the case of FIG. I have.

On the other hand, at this time, the mobile station 2
If the reception level of the wireless zone 6 is deteriorated and it is detected that communication with the wireless base station 3 is impossible, the reception levels of the wireless zones 6 to 8 are measured again, and it is detected that the wireless zone 8 is at the maximum. , And starts receiving the control channel in synchronization with the frequency of the wireless base station 5. Then, the mobile station 2 transmits a communication connection processing continuation response to the radio base station 5 because the communication connection processing continuation instruction signal described above is received. In addition, the wireless base station 3
When the communication connection processing continuation instruction is received from, the communication connection processing continuation response is transmitted in synchronization with the frequency of the wireless base station 5 as described above.

When the wireless base station 5 receives the communication connection processing continuation response from the mobile station 2, it stops sending the communication connection processing continuation instruction signal, and transfers the communication connection processing continuation response to the base station controller 1. The base station controller 1 sends a transmission stop during the communication connection processing continuation to the wireless base station 4, and the wireless base station 4 stops sending the communication connection processing continuation instruction signal. The base station controller 1 continues the communication connection processing interrupted by the transmission and reception of the message in the radio base station 5.

The determination of the communication disabled state is made by the radio base station 3.
5, the mobile station 2 may use bit error rate degradation and no response time excess.

[0033]

As described above, according to the present invention,
Communication connection time can be reduced. Therefore, a decrease in service quality can be prevented. In particular, in a system in which the radio zone of the radio base station is configured by a microcell having a small radio zone, the mobile station has a greater chance of requesting communication from near the boundary, and this effect is significant.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a mobile communication system.

FIG. 2 is a block diagram of a mobile station device.

FIG. 3 is a diagram showing a sequence according to the embodiment of the present invention.

FIG. 4 is a diagram showing a sequence according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base station controller 2 Mobile station 3-5 Base station 6-8 Wireless zone 10 Communication control part

Claims (5)

(57) [Claims] When a mobile station is in a state capable of receiving signals from a plurality of radio base stations, the mobile station communicates with a radio base station transmitting a signal of the maximum level among the signals from the plurality of radio base stations. A mobile communication system comprising: a first step of making a request; and a second step of transmitting and receiving a signal relating to a communication connection process between the wireless base station transmitting the signal of the maximum level in response to the communication request. in connection, in the first step, the mobile station simultaneously transmit information signals reception sensitivity from receivable radio base station other than the wireless base station that transmits the maximum level of the signal, the second In the course of the communication connection process of the second step, the communication quality with the radio base station transmitting the signal of the maximum level is poor.
And communication with the wireless base station becomes impossible,
When a signal from the receivable radio base station is received, and a signal from the receivable radio base station includes a communication connection processing continuation instruction signal, the signal is transmitted to the radio base station that transmitted the instruction signal. A communication connection method of a mobile communication system, wherein communication connection processing is continued. 2. The communication connection method of a mobile communication system according to claim 1, wherein the radio base station receives a communication request from one mobile station and executes a communication connection process. information received together about possible other radio base station, sometimes can not be received the signal from the mobile station in the course of this communication connection processing for the another wireless base station to the base station controller A communication connection method of a mobile communication system, which notifies that the communication connection processing has been interrupted along with the information of the mobile communication system. 3. The communication connection method of a mobile communication system according to claim 2, wherein the base station control device instructs the other wireless base station to continuously execute a communication connection process. Communication connection method of mobile communication system. 4. The communication connection method of a mobile communication system according to claim 3, wherein the other radio base station is configured to perform the mobile communication when the base station control device instructs the mobile station to continue the communication connection process. A mobile communication connection method characterized by transmitting a communication connection processing continuation instruction signal to a station and continuing the communication connection processing when a response is received from the mobile station. 5. When a signal from a plurality of radio base stations is in a receivable state, a radio base station transmitting a signal of the maximum level among signals from the plurality of radio base stations is selected, and the radio base station is selected. A mobile station apparatus comprising: means for making a communication request to the communication base station; and means for transmitting and receiving a signal relating to communication connection processing between the base station transmitting the signal of the maximum level in response to the communication request. Means for transmitting together information on signal reception sensitivity from a receivable radio base station other than the radio base station transmitting the maximum level signal upon request; and transmitting the maximum level signal in a communication connection process. When communication with the wireless base station is disabled, a signal from the receivable wireless base station is received, and a communication connection processing continuation instruction signal is included in the signal from the receivable wireless base station. Means for continuing communication connection processing with the radio base station that has transmitted the instruction signal when there is a mobile station device.