JPH0442695A - Busy line exchange incoming call control system - Google Patents

Abstract

PURPOSE:To easily add a packet exchange system by registering a group of base stations including a base station during communication with a mobile equipment when the mobile equipment makes packet communication and making the procedure of a line exchange station independently of the presence of packet communication. CONSTITUTION:Even when a mobile equipment 1 is busy and its base station is determined, a position registration area 6 including a base station 2 in communication with the mobile equipment 1 is registered to a position registration center 10, and when the line exchange service is received, a line exchange station 8 being an anchor station makes a request of calling the mobile equipment 1 to base stations 2, 3 included in the line registration area 6. Since a base station making communication with the mobile equipment 1 actually is already decided at the point of the time on request in the base stations 2, 3, the call processing of the mobile equipment 1 is not actually implemented, but the line exchange anchor station 8 replies the request as if the station 8 were actually subjected to reception of call processing. That is, the line exchange station 8 makes the same processing independently whether or not the mobile equipment 1 is in packet communication. Thus, the addition of the packet exchange service is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control method in a mobile communication system that can simultaneously provide circuit switching services and packet switching services.

[Conventional technology]

In conventional mobile communication systems, a switching center called an anchor station is fixed while a mobile device is communicating, and even if the switching center to which it connects changes as the mobile device moves, communication always goes through the anchor station, and communication continues at the anchor station. By adopting a system that uses the same trunk, etc. for both calls, even if a new call occurs during communication, it always goes through the anchor station of the current call, and the anchor station can provide services that span both calls. By providing these services, the aim was to reduce processing costs and communication interruption times.

Therefore, as shown in Figure 1, when the mobile device is not communicating,
For a mobile device, a location registration area consisting of multiple base stations including base stations that can communicate with the mobile device is registered with a location registration center, and the switching center that becomes the anchor switching center when an incoming call is connected is registered in the registered location registration area. A request is made to the included base station or the wireless station that controls the base station to call the mobile device.

When the base station calls the mobile device in the radio section and responds to the anchor exchange that it has decided which base station to communicate with,
An incoming signal containing service information is transferred to the mobile device via the determined base station.

Also, as shown in Figure 2, when a mobile device is communicating, the anchor station for the mobile device is registered in the location registration center regardless of the base station with which the mobile device is actually communicating, and the mobile device is communicating with the base station. The anchor station manages the connection to the base station that is conducting the call, and transfers the incoming signal without calling.

[Problem to be solved by the invention]

In the conventional technology described above, when providing a packet-switched service, the anchor switching center also had to manage the communication status of the packet-switched service, and the processing when a circuit-switched call arrived was required to be performed depending on the packet-switched call status. .

The present invention provides circuit switching services and packet switching services at different switching centers in order to consolidate packet switching centers and improve line efficiency by changing the connection routes for circuit switching and packet switching, which have different traffic patterns. A system that provides circuit switching services when packet switching services are added to a mobile communication system that provides circuit switching services, using a control method that performs anchor station control for the same mobile device. The purpose of this invention is to realize a means by which both services can be provided to the same mobile device at the same time without major changes.

[Means to solve the problem]

The present invention has been made to achieve the above-mentioned object, and as described in the claims, a mobile device,
A base station that communicates with a mobile device using a wireless line, a circuit switching station that communicates with the base station, accepts circuit switching services, and connects to a circuit switched network, and a connection between the base station and the packet switched network. It consists of a packet switching center that performs communication with a base station or a mobile device, and a location registration center that registers the circuit switching center and packet switching center that are communicating with a base station or mobile device for each mobile device, and communicates with the mobile device when the mobile device is not communicating. The location registration center stores a group of base stations that are likely to be able to move, and when the switching center needs to communicate with a mobile device, it uses all of the group of base stations stored in the location registration center to communicate with a mobile device. In a mobile communication system in which a base station that can communicate with a mobile device is identified by calling a mobile device and receiving a response from the mobile device, even if the mobile device is performing packet communication, the registration center is not applicable. When a group of base stations is registered with a mobile device and it becomes necessary to perform circuit-switched communication, the circuit switching center performs a paging operation for the mobile device to the group of registered base stations, and calls the base station. is a circuit-switched call termination control system during communication that performs the same procedure as if a call had been made to the circuit switching center without calling the mobile station.

[For production]

According to the present invention, even when a mobile device is communicating with a packet switching service and a base station has been determined, the location registration area corresponding to the mobile device in communication is registered in a location registration center. When the line switching center requests a mobile device to call a base station included in the location registration area registered at the time of incoming call connection, or a wireless station that controls the base station (actually, the base station is The most important feature is that the system behaves as if it had made a paging operation to the circuit switching center without performing this process (because the mobile device does not need to perform paging processing on the mobile device). Therefore, the anchor switching center that provides the circuit switching service only manages the communication status of the circuit switching service and does not need to manage the call status of the packet switching service.

〔Example〕

FIG. 3 is a diagram showing an example of a system configuration for implementing the present invention, in which 1 is a mobile device, 2.3 is a base station, 4.5 is a wireless zone corresponding to each base station 2.3, and 6 is a wireless zone. zone 4
．． 5 is the device registration area, 7 is the base station 2.3
8 is the anchor station for the circuit switching service, 9 is the anchor station for the packet switching service, and 10 is the location registration center. Here, it is assumed that a physical or logical dedicated line is set up between the anchor station 9 of the packet switching service and the base stations 2 and 3.

FIG. 4 is a diagram showing an example of a circuit switching connection procedure when a mobile device is performing packet communication and there is a base station communicating with the mobile device. In the figure, even if the mobile device 1 is communicating and the base station has been determined, the location registration center 10
Location registration area 6 including base station 2 with which mobile device 1 is communicating
is registered, and when the circuit switching service arrives, the circuit switching station 8 serving as the anchor station transmits the mobile device 1 to the base station 2゜3 included in the location registration area 6 registered in the location registration center 10. Request a call. Base stations 2 and 3 do not actually perform paging processing for mobile device 1 because the base station that will communicate with mobile device 1 has already been determined at the time of the request; Respond as if the call had actually been processed.

In this way, the location registration area of the mobile device is registered in the location registration center even during packet communication, and furthermore, by making it appear as if the base station is calling the mobile device to the circuit switching center, The same processing can be performed regardless of whether the mobile device is in the middle of packet communication.

[Effects of the Invention] As explained above, when a mobile device is performing packet communication, a group of base stations including the base station in communication with the mobile device is registered, and circuit switching is performed regardless of whether packet communication is being performed. By making the procedures of the stations the same, there is no need for the circuit switching system to know the status of the packet switching system, and it becomes possible to easily add a packet switching system.

Note that this method can also be used when multiple stations manage multiple communications even for the same service.

Claims (1)

[Scope of Claims] A mobile device, a base station that communicates with the mobile device using a wireless line, a circuit switching station that communicates with the base station, accepts circuit switching services, and connects to a circuit switched network; It consists of a base station, a packet switching center that connects the packet switching network, and a location registration center that registers the circuit switching center and packet switching center communicating with the base station or mobile device for each mobile device. During non-communication, a group of base stations that may be able to communicate with the mobile device are stored in the location registration center, and when the switching center needs to communicate with the mobile device, the location registration center stores them. In a mobile communication system in which a group of base stations called by a mobile device all call the mobile device and one base station accepts a response from the mobile device to identify a base station that can communicate with the mobile device, the mobile device performs packet communication. Even in the case where a group of base stations is registered for the mobile device at the registration center, when it becomes necessary to perform circuit switched communication, the circuit switching center registers a group of base stations for the mobile device at the registration center. On the other hand, a communication circuit switching incoming call control method is characterized in that a mobile device is called, and the base station performs a procedure as if it were calling a circuit switching center without calling the mobile device.