JP2007274135A - Network device and simultaneous calling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow a mobile station device to respond to an incoming call even when it is out of a simultaneous calling area registered in a call control server, concerning a network device composed of the call control server and the base station devices. <P>SOLUTION: The network device composed of an SIP server and the base station devices 40 includes: an in-area simultaneous calling area storage 11 for storing by associating the mobile station devices 50, and simultaneous calling area information which indicates the simultaneous calling areas; a related simultaneous calling area obtaining part 43 for obtaining one or the plurality of simultaneous calling areas related to the simultaneous calling area which is indicated by the simultaneous calling area information stored in the in-area simultaneous calling area storage 11; and a related simultaneous calling area simultaneous calling section 44 for performing simultaneous calling in one or the plurality of simultaneous calling areas obtained by the related simultaneous calling area obtaining part 43 in a prescribed case. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a network device and a simultaneous call method, and more particularly to a technique for performing a simultaneous call of a mobile station device.

  In a mobile communication system that adopts a cellular system, a plurality of simultaneous paging areas (an area composed of one or a plurality of cells, which is a unit for performing a general paging) are generally set and installed on a network. In the call control server, a paging area is registered for each mobile station device. When an incoming call is received from a network to a mobile station apparatus, a general paging signal is transmitted in a plurality of cells constituting a general paging area registered in the call control server for the mobile station apparatus (for example, Patent Document 1).

  The general call area registered in the call control server is updated as the mobile station apparatus moves. The process related to this update is called a position registration process. Hereinafter, the location registration process will be described.

  The base station apparatus periodically broadcasts the general call area information indicating the general call area to which the cell configured by the base station apparatus belongs, and the mobile station apparatus always receives the general call area information. As the mobile station apparatus changes its own position, the paging area information different from the paging area information indicating the paging area that has been in the area (within the area) is received. Then, a new simultaneous call area is registered in the call control server via the base station apparatus. As a result, a new paging area is registered in the call control server in association with the mobile station device. The location registration process is performed in this way.

In the above background art, the location registration process is always performed when the mobile station apparatus moves from one general call area to another general call area. If the paging area where the mobile station device actually exists is not registered in the call control server, a paging signal is sent out in the paging area where the mobile station device does not exist, and the mobile station device makes a paging call. This is because it becomes impossible to respond.
JP 2005-217959 A

  However, in the above background art, position registration processing is performed proactively at a stage where it is not known whether there is actually an incoming call, and in many cases, the power held by the mobile station apparatus is consumed wastefully. It had become. Therefore, in order to reduce the power consumption of the mobile station device, the mobile station device can respond to incoming calls even when the mobile station device is located outside the general call area registered in the call control server. It is hoped to do.

  Therefore, one of the problems of the present invention is a network device composed of a call control server and a base station device, and even if the network device is located outside the simultaneous call area registered in the call control server, It is an object of the present invention to provide a network device and a simultaneous call method that enable a station device to respond to an incoming call.

  In order to solve the above problems, a network device according to the present invention comprises: a mobile station device; and a simultaneous call area storage unit that stores and stores in association with general call area information indicating a general call area; With respect to the general call area indicated by the general call area information stored in the call area storage means, the related general call area acquisition means for acquiring one or a plurality of general call areas related to the general call area, and in a predetermined case, In one or a plurality of general call areas acquired by the related general call area acquisition means, the related general call area simultaneous call means for performing a general call is included.

  According to this, even when the user is in a area other than the general call area stored in the local general call area storage unit, the user is in one or more general call areas acquired by the related general call area acquisition unit. The mobile station apparatus can respond to an incoming call.

  Further, in the network device, when an incoming call is made to a certain mobile station device, the paging call is performed in the paging area indicated by the paging area information stored in the located paging area storage unit for the mobile station device. The related simultaneous call area simultaneous call means is obtained by the related simultaneous call area acquisition means according to the result of the simultaneous call performed by the network device. It is good also as making a simultaneous call in one or several simultaneous call areas.

  According to this, the general call area can be expanded according to the result of the general call by the network device.

  In the network device, a plurality of paging areas related to the paging area are associated with the paging area indicated by the paging area information stored in the visited paging area storage unit. The related general call area storage means for classifying and storing the general call area information classified into a plurality of ordered types, and the related general call area acquisition means, the related general call area simultaneous call means for the incoming call, Based on the number of simultaneous calls made and the order of the general call area information stored in the related general call area storage means, for the general call area, one or more general calls related to the general call area It is good also as acquiring an area.

  According to this, the simultaneous call area can be gradually expanded.

  Further, the simultaneous call method according to the present invention is indicated by the general call area information stored in the in-area general call area storage means for storing the mobile station device and the general call area information indicating the general call area in association with each other. A related paging area acquisition step of acquiring one or a plurality of paging areas related to the paging area, and one or more acquired in the related paging area acquisition step in a predetermined case. And a related paging area paging step for performing a paging call in the paging area.

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

  FIG. 1 is a diagram showing a system configuration of a mobile communication system 1 according to the present embodiment. As shown in the figure, the mobile communication system 1 includes a SIP (Session Initiation Protocol) server 10, a network 20, a PDSN (Packet Data Serving Node) 30, a base station device 40, and a mobile station device 50. And comprising. The SIP server 10, the network 20, the PDSN 30, and the base station device 40 constitute one network device.

  The SIP server 10, the PDSN 30, the base station device 40, and the mobile station device 50 are all computers including a CPU and a memory. The CPU is a processing unit for executing a program stored in the memory, and performs processing for controlling each part of each device and realizes functions described later. The memory stores programs and data for carrying out the present embodiment. It also operates as a work memory for the CPU.

  The network 20 is configured by an IP network including IP network devices such as routers.

  The PDSN 30 is a relay device provided to relay packets transmitted and received between the network 20 and the base station device 40.

  Base station apparatus 40 is installed in various places. Each base station apparatus 40 communicates with a mobile station apparatus 50 existing in a geographical area (cell) where radio waves can be transmitted and received. The presence of the mobile station device 50 in a certain cell is said to be present in that cell. In addition, an area (simultaneous call area) that is a unit for performing a general call is configured by one or a plurality of cells, and the fact that the mobile station device 50 exists in the general call area is located in the general call area. It is said to be in a zone.

  The mobile station device 50 communicates with a communication device (not shown) connected to the network 20 by IP telephone.

  The SIP server 10 stores the telephone number of the destination IP phone and information indicating the IP address in association with each other in order to interconnect the IP phones. Specifically, the telephone number of the mobile station device 50 as the destination IP phone and the information indicating the general call area where the mobile station device 50 is located are associated and stored, and the general call area and the base station Information indicating the device 40 (such as the IP address of the base station device 40) is stored in association with each other, and when there is a call specifying the telephone number of the mobile station device 50, the information stored in association is stored. The base station device 40 constituting the calling area is configured to be able to make a simultaneous call.

  Hereinafter, functions of the SIP server 10 and the base station apparatus 40 according to the present embodiment will be described in detail with reference to functional blocks of the SIP server 10 and the base station apparatus 40.

  FIG. 2 is a diagram illustrating functional blocks of the SIP server 10 and the base station device 40. As shown in the figure, the SIP server 10 is functionally configured to include a visited general call area storage unit 11, a base station apparatus-general call area correspondence storage unit 12, and a visited general call area simultaneous call unit 13. The base station device 40 functionally includes a base station device-simultaneous call area correspondence storage unit 41, a related general call area storage unit 42, a related general call area acquisition unit 43, and a related general call area general call unit 44. Is done.

  The visited general call area storage unit 11 stores a visited general call area table that associates information indicating the mobile station device 50 with general call area information indicating the general call area. FIG. 3 shows an example of the visited simultaneous call area table. When the mobile station device 50 communicates with other communication devices, the mobile station device 50 notifies the SIP server 10 of the simultaneous call area in which it is located. The SIP server 10 associates the notified general paging area information indicating the general paging area with the information indicating the mobile station device 50 and stores it in the in-zone general paging area table.

  The base station apparatus-simultaneous call area correspondence storage unit 12 stores a base station apparatus-simultaneous call area correspondence table that associates the general call area with the base station apparatus. FIG. 4 shows an example of this base station apparatus-simultaneous calling area correspondence table. As shown in the figure, each paging area is usually associated with a plurality of base station devices 40. In this way, each base station apparatus 40 stored in association with each general paging area constitutes a corresponding general paging area.

  When there is an incoming call to a certain mobile station device 50, the located area simultaneous calling area simultaneous calling unit 13 performs the simultaneous calling indicated by the general calling area information stored in the visited general calling area table for the mobile station device 50. Make a general call in the area. Specifically, the base station device 40 constituting the general call area is acquired from the base station device-simultaneous call area correspondence table, and the mobile station device 50 that has received an incoming call is indicated to the base station device 40. Send an incoming signal.

  When the base station device 40 receives the incoming signal transmitted in this way, the base station device 40 informs the mobile station device 50 indicated by the incoming signal of information through the broadcast channel. If the mobile station device 50 has received one or more receivable broadcast channels and includes information indicating that the mobile station device 50 has received an incoming call, the mobile station device 50 receives the broadcast channel. Wireless communication is started with the base station apparatus 40 that is transmitting the broadcast channel having the best reception state. Then, communication is started with the communication device that has transmitted to the mobile station device 50 via the wireless communication.

  When the mobile station device 50 performs wireless communication with the base station device 40 in this way, the mobile station device 50 notifies the SIP server 10 of the simultaneous call area configured by the base station device 40. The SIP server 10 updates the visited general call area table based on this information.

  By the way, when the mobile station device 50 has moved from the general call area indicated by the general call area information stored in the visited general call area table, the mobile station device 50 displays information indicating that an incoming call has been received. Cannot receive. Therefore, a predetermined one of the base station devices 40 constituting the certain paging area (base station device 40-1 in FIG. 2) is a broadcast channel including information indicating information indicating that an incoming call has been received. Is transmitted, the wireless communication with the mobile station device 50 is monitored in any one or a plurality of base station devices 40 constituting the simultaneous call area, and any base station device is determined within a predetermined time. If the wireless communication with the mobile station device 50 is not started even at 40, a simultaneous call is performed in another simultaneous call area. Hereinafter, the function for this will be described.

  First, the base station apparatus-simultaneous calling area correspondence storage unit 41 stores a visited general call area table similar to the visited general call area table stored in the base station apparatus-simultaneous calling area correspondence storage unit 12. .

  The related paging area storage unit 42 associates each paging area with the paging area (the paging area where the paging by the paging unit 13) is configured by the base station device 40. A related general paging area table for storing a plurality of general paging area information respectively indicating a plurality of general paging areas associated with each of the plurality of general paging areas classified into a plurality of ordered types is stored. FIG. 5 shows an example of this related simultaneous call area table. In the figure, the order is represented by the notation of level 1, level 2, level 3,.

  The related paging area acquisition unit 43 acquires one or a plurality of paging areas related to the paging area for the paging area configured by the base station device 40. Specifically, for a certain incoming call, based on the number of simultaneous calls made by the related general call area simultaneous call unit 44 described later and the order of the general call area information stored in the related general call area table, With respect to the incoming call, the one or more general calling areas related to the general calling area are acquired for the general calling area where the general calling area 13 has made a general call.

  More specifically, the related paging area acquisition unit 43 sets the paging area ordered to level 1 when the number of paging performed by the related paging area paging unit 44 for the incoming call is zero. To get. Further, when the number of simultaneous calls made by the related general call area general call unit 44 for the incoming call is one, the general call area ordered in level 2 is acquired. Similarly, the related simultaneous call area acquisition unit 43 sequentially acquires the general call area.

  The related general call area general call unit 44 is one or a plurality of general call areas acquired by the related general call area acquisition unit 43 according to the result of the general call performed by the SIP server 10 or the base station device 40-1. In, make a general call. Specifically, one or a plurality of other base station devices 40 (the base station device 40-2 and the base station device 40-3 in FIG. 2) constituting the general call area are set in the base station device-general call area table. To the base station apparatus 40, and transmits an incoming signal indicating the mobile station apparatus 50 that has received the incoming call.

  The processing in the other base station device 40 that has received this incoming signal is the same as the processing in the case of receiving the incoming signal from the SIP server 10. After transmitting the incoming signal in this way, the base station device 40-1 monitors whether any of the base station devices 40 has started wireless communication with the mobile station device 50, and any base station within a predetermined time. If wireless communication with the mobile station device 50 is not started in the device 40, the related simultaneous call area simultaneous call unit 44 makes a general call again. At this time, since the number of simultaneous calls made by the related general call area general call unit 44 is increased by 1, the related general call area acquisition unit 43 sets the number of the general call area where the related general call area general call unit 44 has made a general call. Next, the paging area to be ordered is acquired. As a result, even when the related general call area general call unit 44 performs the general call again, the general call area is called in the general call area ordered next to the general call area where the general call has been performed.

  The processing described above will be described more specifically again with reference to the processing sequence of the mobile communication system 1.

  FIG. 6 is a diagram showing a processing sequence of the mobile communication system 1. FIG. 6 illustrates an example in which the general call areas are not ordered in the related general call area table. In the initial state of FIG. 6, it is assumed that the simultaneous call area stored in association with the mobile station device 50-1 in the visited general call area table is a general call area configured by the base station device 40-1 alone. .

  When there is an incoming call to the mobile station apparatus 50-1, the SIP server 10 uses the mobile station apparatus in the base station apparatus 40-1 acquired from the in-zone simultaneous call area table and the base station apparatus-simultaneous call area correspondence table. 50-1 simultaneous call. Specifically, an INVITE signal indicating mobile station apparatus 50-1 is transmitted (S1).

  Receiving the INVITE signal, the base station device 40-1 periodically transmits a broadcast channel (PCH) including information indicating that there is an incoming call to the mobile station device 50-1 over a predetermined time (S2). . On the other hand, when there is no response from the mobile station device 50-1, the base station device 40-1 acquires the related general call area from the related general call area table, and one or a plurality of base stations constituting the related general call area In the device 40 (the base station device 40-2 and the base station device 40-n in FIG. 6), the mobile station device 50-1 is collectively called. Specifically, a paging information message indicating the mobile station device 50-1 is transmitted to these base station devices 40 (S3). Receiving the paging information message, the base station device 40 periodically transmits a broadcast channel (PCH) including information indicating information indicating that there is an incoming call to the mobile station device 50-1 over a predetermined time (S4).

  Here, if the mobile station device 50-1 responds to the base station device 40-n, the mobile station device 50-1 performs a handover to the base station device 40-n (S5). The base station device 40-n that has received this handover establishes a session with the PDSN 30 (S6). The PDSN 30 transmits a communication start message indicating that communication of the mobile station device 50-1 is started to the base station device 40-1 (S7). The process (paging process) related to the general call related to the mobile station device 50-1 is stopped.

  When the base station device 40-n establishes a session with the PDSN 30, the base station device 40-n transmits an INVITE signal to the mobile station device 50-1 (S8). Receiving this, the mobile station device 50-1 establishes communication with the SIP server 10 (S9) and updates the in-zone simultaneous call area table of the SIP server 10. After that, the mobile station device 50-1 starts communication with the communication device that has transmitted to the mobile station device 50-1 (S10).

  FIG. 7 is also a diagram showing a processing sequence of the mobile communication system 1. FIG. 7 illustrates an example in which the general paging areas are ordered in the related paging area table. Even in the initial state of FIG. 7, as in FIG. 6, the simultaneous call area stored in association with the mobile station device 50-1 in the visited general call area table is a general call configured by the base station device 40-1 alone. Suppose that it is an area.

  When there is an incoming call to the mobile station apparatus 50-1, the SIP server 10 uses the mobile station apparatus in the base station apparatus 40-1 acquired from the in-zone simultaneous call area table and the base station apparatus-simultaneous call area correspondence table. 50-1 simultaneous call. Specifically, an INVITE signal indicating mobile station apparatus 50-1 is transmitted (S1).

  Receiving the INVITE signal, the base station device 40-1 periodically transmits a broadcast channel (PCH) including information indicating that there is an incoming call to the mobile station device 50-1 over a predetermined time (S2). . On the other hand, when there is no response from the mobile station device 50-1, the base station device 40-1 acquires the level 1 related general call area from the related general call area table and configures one or more of the related general call areas. In the base station apparatus 40, the mobile station apparatus 50-1 is simultaneously called. Specifically, a paging information message indicating the mobile station device 50-1 is transmitted to these base station devices 40 (S20). Receiving the paging information message, the base station device 40 periodically transmits a broadcast channel (PCH) including information indicating information indicating that there is an incoming call to the mobile station device 50-1 over a predetermined time (S21).

  When the mobile station device 50-1 does not respond to the PCH transmitted in S21 (when the communication start message does not reach the base station device 40-1 within a predetermined time), the base station device 40-1 A related general call area of level 2 is acquired from the general call area table, and the mobile station apparatus 50-1 is collectively called in one or a plurality of base station apparatuses 40 constituting the related simultaneous call area. Specifically, a paging information message indicating the mobile station device 50-1 is transmitted to these base station devices 40 (S22). Receiving the paging information message, the base station device 40 periodically transmits a broadcast channel (PCH) including information indicating information indicating that there is an incoming call to the mobile station device 50-1 over a predetermined time (S23).

  If the mobile station device 50-1 responds to the PCH transmitted in S23, the mobile station device 50-1 performs a handover to a specific base station device 40 (S5). The subsequent processing is the same as that in FIG.

  As described above, according to the mobile communication system 1, even when the mobile station device 50 is located in a region other than the general paging area stored in the local paging area table, the related paging area acquisition unit When the mobile station device 50 is in one or more general call areas acquired by the mobile phone 43, the mobile station device 50 can respond to the incoming call. Further, the simultaneous call area can be gradually expanded according to the result of the simultaneous call by the located general call area general call unit 13 and the related general call area general call unit 44.

  The present invention is not limited to the above embodiment. For example, in the above embodiment, the IP phone has been described as an example, but the present invention can be applied to other types of phones such as circuit switching. In the above embodiment, the base station device 40-1 includes the related simultaneous call area storage unit 42, the related simultaneous call area acquisition unit 43, and the related simultaneous call area simultaneous call unit 44. It is not necessary to be included in 40, but the present invention can be implemented by including it in any one or more of the devices constituting the network device. In this case, the related simultaneous call area may be stored in association with each of a plurality of general call areas in the related general call area table.

It is a figure which shows the system configuration | structure of the mobile communication system concerning embodiment of this invention. It is a figure which shows the functional block of the mobile communication system concerning embodiment of this invention. It is a figure which shows the example of the in-zone simultaneous call area table concerning embodiment of this invention. It is a figure which shows the example of the base station apparatus-simultaneous calling area correspondence table concerning embodiment of this invention. It is a figure which shows the example of the related simultaneous call area table concerning embodiment of this invention. It is a figure which shows the process sequence of the mobile communication system concerning embodiment of this invention. It is a figure which shows the process sequence of the mobile communication system concerning embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Mobile communication system, 10 SIP server, 11 Visited area simultaneous call area memory | storage part, 12 Base station apparatus simultaneous call area corresponding | compatible memory part, 13 Visited area simultaneous call area simultaneous call part, 20 Network, 30 PDSN, 40 Base station apparatus , 41 Base station device simultaneous call area correspondence storage unit, 42 related simultaneous call area storage unit, 43 related simultaneous call area acquisition unit, 44 related simultaneous call area simultaneous call unit, 50 mobile station device.

Claims (4)

In-zone simultaneous call area storage means for storing the mobile station apparatus and the general call area information indicating the general call area in association with each other;
A related paging area obtaining unit for obtaining one or a plurality of paging areas related to the paging area for the paging area indicated by the paging area information stored in the visited paging area storage unit;
In a predetermined case, in one or a plurality of simultaneous call areas acquired by the related simultaneous call area acquisition means, related simultaneous call area simultaneous call means for performing a simultaneous call;
A network apparatus comprising: The network device according to claim 1,
When there is an incoming call to a certain mobile station device, a visited paging area for making a paging call in the paging area indicated by the paging area information stored in the visited paging area storage means for the mobile station device Simultaneous calling means,
Further including
The related paging area paging means performs a paging call in one or a plurality of paging areas acquired by the related paging area acquisition unit according to the result of the paging performed by the network device.
A network device. The network device according to claim 2, wherein
A plurality of general call area information respectively indicating a plurality of general call areas related to the general call area is ordered in association with the general call area indicated by the general call area information stored in the visited general call area storage means. Related general call area storage means for classifying and storing a plurality of types
Further including
The related general call area acquisition means is based on the number of simultaneous calls made by the related general call area general call means for the incoming call and the order of the general call area information stored in the related general call area storage means. Obtaining one or more general call areas related to the general call area for the general call area;
A network device. The general call area indicated by the general call area information stored in the local general call area storage means for storing the mobile station device and the general call area information indicating the general call area in association with each other is stored in the general call area. A related paging area acquisition step of acquiring one or more related paging areas;
In a predetermined case, in one or a plurality of general call areas acquired in the related general call area acquisition step, a related general call area simultaneous call step for performing a general call;
A simultaneous calling method comprising:

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