JP4825285B2 - Mobile communication network - Google Patents

Description

  The present invention relates to a location registration method for a mobile station on the base station side in a mobile communication network system, and more specifically, without using normal location information when a user who owns a mobile device moves on a train, for example. The present invention relates to a mobile communication network using a moving network that performs location registration using specific location information previously assigned to a specific range.

  In a mobile communication system, when an incoming call is made to a specific mobile device existing in the service area, the position where the mobile device exists in the service area is specified within a certain range, and only radio base stations within that range are specified. The operation of calling the mobile device from is performed.

  Therefore, it is necessary for each mobile device to register its existing location in advance on the network side, for example, the core network side. This operation is called location registration, and a range serving as a location registration unit is called a location registration area.

  Each mobile device needs to perform location registration, for example, on the core network side every time the location registration area to which the mobile device belongs changes. In order to perform such location registration, the mobile device stores location registration area information of the current location, monitors changes in location registration area information every time the wireless zone to which it belongs changes, and detects such changes In this case, a new location registration signal is transmitted to the core network side. Here, the wireless zone means a wireless signal reachable range by one wireless base station, and generally a plurality of wireless zones are combined into one location registration area.

  There are the following documents concerning location registration by a mobile device in such a mobile communication system, a method for setting a location registration area, a method for switching to a train movement mode, and a mobile phone system on a toll road.

  In Patent Document 1, it is only necessary to install radio base stations at the entrance and exit of a toll road, and without using a special dedicated device for toll collection using an existing mobile phone system, the capital investment cost A mobile phone system for toll roads that can reduce the amount of traffic is disclosed.

  In Patent Document 2, when a mobile device is in a mobile space such as a train or a bus and moves together with the mobile space, the registration position of the mobile device is updated depending on the update of the location registration of the mobile space, For example, a position registration method is disclosed in which the position registration operation of n mobile devices in the movement space can be represented by the position registration operation in the movement space, and the number of position registrations can be reduced to 1 / n.

  Patent Document 3 discloses that a mobile communication system can reduce the frequency of location registration by each mobile communication terminal by allowing a mobile communication terminal to set a range with a high coverage ratio as a logical location registration area. Discloses a technique capable of reducing the load of the location registration process.

  In Patent Document 4, when the position information Pb reported from the microcell base station is different from the position information Pa reported from the mobile phone service base station, the position information Pb is transmitted to the mobile phone switch. Discloses a technique capable of detecting the position of a terminal within a radio zone corresponding to a microcell base station.

  In Patent Document 5, dynamic traffic information of mobile devices is collected, and when the number of location registration requests exceeds a predetermined value, the location registration area of the movement destination is integrated into the location registration area of the movement source to create a new location. A technique for suppressing the occurrence of a registration request is disclosed.

  Patent Document 6 includes a plurality of types of division patterns for dividing a communication service area into a plurality of location areas, and a mobile device selects a division pattern generated in its movement characteristics and performs position registration processing, thereby performing position registration processing. A technology that can eliminate waste of traffic related to registration and incoming calls is disclosed.

  Patent Document 7 discloses a technique for reliably determining that a user having a mobile device is on a train and automatically switching the own device to a train movement mode such as power-off and manner mode based on the result. Is disclosed.

  However, in the conventional technology as described above, when a user who has a mobile device gets on a public transportation such as a train, a bus, or an airplane and travels a long distance, for example, along with the movement of the train Whenever the location registration area to which the mobile device belongs changes, it is unavoidable that a large number of mobile devices possessed by a user on the train cannot perform location registration all at once. This problem also occurs on a highway where a user who owns a mobile device travels, for example, by riding a car, and there are a large number of train and bus routes and location registration areas corresponding to the highway. However, the location registration area can be defined in advance as a set.

  Thus, for example, when a user having a mobile device moves on a train, firstly, the problem that the load on the network due to location registration accompanying the movement of the mobile device increases, and secondly, the location The problem is that the power consumption on the mobile device side and the network side increases due to the registration processing, and thirdly, the quality of the radio transmission path for other mobile devices deteriorates due to the location registration processing. is there. These problems will be further described with reference to FIGS.

  In 3GPP (Third Generation Partnership Project) as an organization for creating specifications for third generation mobile communication systems, W-CDMA (Wideband Code Devision Multiple Access) system is used for wireless access systems. The extended version of GSM (Global System for Mobile Communication) is adopted as the core network system. In this 3GPP specification, the wireless communication service area is defined as a location area LA for a plurality of circuit switches (CS) or a packet switch ( PS) is defined by the routing area RA, and the location information is managed on the core network side. For example, when receiving an incoming call to a mobile device, paging is performed on a radio network controller RNC (radio network controller) existing between the core network and a radio base station using position information managed by the core network. A request is made. In response to the paging request, the RNC performs paging on the area where the incoming request should be notified.

  FIG. 30 is an explanatory diagram of the relationship between the location area LA and the routing area RA in the 3GPP system. In the figure, one LA generally includes one or more RAs, one or more LAs are respectively managed by a mobile switching center MSC (Mobile Switching Center), and one or more RAs are respectively Managed by a subscriber node SGSN (Serving GPRS Support Node).

  FIG. 31 is an explanatory diagram of a position registration generation process associated with a moving route of a train, for example. When a large number of users having mobile devices move by train in the mobile communication network, many mobile devices perform location registration processing for changing the location information LA / RA all at once. For this reason, in the mobile communication network and the core network, an instantaneous load increase due to the location registration request occurs.

  FIG. 32 is an explanatory diagram of radio channel quality deterioration due to an increase in the number of location registrations. In the figure, for example, it is shown that the number of location registrations and the increase in power consumption corresponding to the movement of a train occur at the same time, that is, at the time when the train passes the location registration occurrence point. That is, the wireless transmission path quality deteriorates due to the rapid increase in location registration, and power consumption increases due to location registration processing required on both the network side and the mobile device side. In particular, the mobile station side is battery-driven, and it is necessary to reduce the number of occurrences of the location registration operation as much as possible in order to reduce power consumption as much as possible.

  However, even if the above-described conventional technology is used, it is basically impossible to prevent an increase in position registration processing when a large number of users having mobile devices move using a train or the like. Even if the technique of Patent Document 2 is used, a position registration process accompanying the movement of the train itself is necessary, and a process for updating all of the position information of each mobile device is required corresponding to the registration process. There was a point.

Japanese Patent Laid-Open No. 11-7562 JP-A-11-355835 JP 2000-23234 A JP 2000-152314 A JP 2001-169332 A JP 2002-165255 A Japanese Patent Laid-Open No. 2002-300632

  In view of the above-mentioned problems, the subject of the present invention is that, when a large number of subscribers having a mobile device move by, for example, a train, location registration is performed using specific location information corresponding to the travel route of the train. By doing so, location registration accompanying the movement of the train is completely unnecessary, and an increase in network load and power consumption due to an increase in location registration processing, and deterioration in transmission path quality are prevented.

  FIG. 1 is a block diagram showing the principle configuration of a mobile communication network according to the present invention. FIG. 1 is a block diagram illustrating the principle configuration of a mobile communication network including a plurality of base stations 1 and a plurality of mobile devices 2. This mobile communication network further includes at least specific location information notification means 3.

  The specific position information notifying means 3 gives specific position information given to a predetermined specific range, for example, a range of a moving route of a train, to the mobile device 2 moving within the specific range. Each mobile device 2 registers its location with the base station 1 using the specific location information when it enters the specific range.

  In the present invention, the base station 1 notifies the mobile station 2 of parameters necessary for receiving information notified from the specific position information notification means 3, and the mobile station 2 uses the parameters to specify the specific position information. Can also be received.

  In addition, the mobile device 2 can perform call processing including incoming / outgoing in a normal procedure without being involved in the specific location information notifying unit 3 during the period of location registration using the specific location information.

  Further, the specific location information notifying means 3 indicates the presence of the above-mentioned predetermined specific range, and the reception can be used by the mobile device 2 as one of the conditions of location registration using the specific location information for the base station 1 A pilot signal can be transmitted to the mobile device 2.

  Further, in the present invention, the specific location information notifying means 3 is provided in the moving network device 4 located between the mobile device 2 and the base station 1, and the mobile device 1, the moving network device 4, and the base station 1 described above A moving network corresponding to the range is configured, and the mobile device 2 can join the moving network by location registration using the specific location information described above.

  In the embodiment of the invention, the mobile device 2 receives a notification signal for searching for a moving network from the base station 1, and uses the notification signal to relate to the moving network including the specific location information from the moving network device 4. When the information is received, it is possible to subscribe to the moving network, or in addition to receiving the moving network related information, the subscription point GPS information further included in the moving network related information and the GPS information possessed by the mobile device 2 itself, Can be added to the moving network when further matching is detected, or can be added to the moving network when the reception level of the pilot signal received from the moving network device 4 exceeds a certain threshold. .

  Further, in the embodiment, when the mobile station 2 receives a pilot signal transmitted from the moving network device 4 while joining the moving network, the reception level of the pilot signal falls below a certain threshold value, instead of the above-described specific position information, the normal position information of the current location It is possible to leave the moving network by performing location registration using the mobile network 2, or the mobile device 2 has a moving network subscription continuation range corresponding to the departure point GPS information while the mobile device 2 is subscribed to the moving network, and the GPS that the mobile device 2 itself has. When it is detected that it is out of the subscription continuation range by comparing with the information, it is possible to leave the moving network by performing location registration using the normal location information of the current location.

  In the embodiment of the invention, the specific position information can be defined as a set of a plurality of normal position information corresponding to a plurality of areas included in the specific range. Further, in the embodiment, in response to the location registration performed from the mobile device 2 to the base station 1 side on the core network side connected to the mobile communication network, the location of the mobile device is determined using the specific location information described above. A mobile device location information management means for managing can also be provided, and a location information correspondence management means for managing the correspondence between specific location information and a plurality of normal location information can also be provided on the core network side.

  In the embodiment, the radio network controller that connects the mobile communication network side and the core network side includes a location information correspondence management unit that manages the correspondence between the specific location information and a plurality of normal location information. You can also.

  As described above, according to the present invention, the position of a mobile device is managed using specific position information defined as a set of a plurality of normal position information corresponding to a specific range, for example.

  According to the present invention, the mobile device is defined as a set of a plurality of normal position information corresponding to the travel route of the train, for example, at the time of joining the moving network, for example, when the user carrying the mobile device gets on the train. The location registration is performed using the specified location information and no location registration is performed while subscribing to the moving network, so the number of location registration processes for the entire mobile communication network can be greatly reduced. It is possible to prevent an increase in load and power consumption, and to prevent quality deterioration in the wireless transmission path.

It is a block diagram which shows the principle structure of the mobile communication network in this invention. It is a block diagram which shows the basic composition of the mobile communication network in this invention. It is a figure which shows the structural example of a moving network apparatus. It is explanatory drawing of the definition of the positional information with respect to a moving network. It is a flowchart of the presence confirmation process of a moving network. It is a flowchart of the search process of a moving network. It is a flowchart of the joining process to a moving network. It is a figure which shows the storage content of the moving network related information in the system information block in a 1st Example. It is explanatory drawing of the registration sequence of moving network position information. It is a sequence of the 1st example of a paging process. It is a sequence of the 2nd example of a paging process. It is an example of the storage content of the table for showing the correspondence with the positional information on a moving apparatus, a moving network positional information, and normal positional information. It is an example of the positional information management table of a mobile apparatus. It is an example of the table which shows a response | compatibility with moving network position information and normal position information. It is an example of the table which shows a response | compatibility with the moving network position information for every radio network controller, and normal position information. It is explanatory drawing of the addition method of the system information by a moving network apparatus. It is a figure explaining the example of the joining / leaving point with respect to a moving network. It is explanatory drawing of the leaving point information update method corresponding to the notification from Node B. It is a figure which shows a response | compatibility with cell information and leaving point information. It is explanatory drawing of the format of a pilot channel. It is a figure which shows a leaving point information update sequence. It is explanatory drawing of the pilot channel reception area | region in a 2nd Example. It is a figure explaining the threshold value with respect to the reception level of a pilot channel. It is explanatory drawing of the moving network subscription condition setting method corresponding to the coincidence of GPS information and the reception level of the pilot channel. It is explanatory drawing of the specific example from which the subscription range to a moving network differs from the subscription continuation range. It is a figure explaining the frequency | count of position registration in FIG. It is explanatory drawing of the hysteresis characteristic in joining / leaving to a moving network. It is a flowchart of the detachment | leave process from a moving network. It is explanatory drawing of a system information reception format when a moving network is not involved. It is a figure which shows the relationship between LA and RA in a 3GPP system. It is explanatory drawing of the position registration generation | occurrence | production situation when many mobile machines move, for example by a train. It is explanatory drawing of radio | wireless transmission path quality degradation by the increase in the frequency | count of position registration.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As described above, in the present embodiment, a moving network is constructed in a form that does not change the 3GPP system as much as possible based on the specifications of the 3GPP system. It shall be. In addition, the moving network itself does not change the location registration, the mobile device that has joined the moving network does not perform the location registration associated with the movement during the subscription, and the incoming / outgoing calls to and from the base station side are, for example, a moving network device to be described later In the following, the embodiment will be described based on the principle that it is performed without going through the above.

  FIG. 2 is an overall configuration block diagram of a mobile communication network including a moving network. In the figure, a moving network including a moving network device 12 is defined between a mobile device UE (user equipment) 10 and a node B 11. Here, the node B11 means a base station in 3GPP, which is a node that logically performs radio transmission / reception, and physically refers to a radio base station apparatus. Although the physical moving network device 12 is provided between the UE 10 and the node B11, the moving network device 12 may be basically a logical device, for example, a radio base station device as the node B11. Of course, it can be realized as a part of the above.

  In FIG. 2, the node B11, that is, the radio base station apparatus is connected to a radio network controller RNC (radio network controller) 13 that performs resource management, and the RNC 13 is a mobile switching center (MSC (mobile switching center)). ) 14 and xGSN 15, the above SGSN, or GGSN (Gateway GPRS Support Node) as a gateway node for controlling access to the Internet service provider, and MSC 14 has a location register VLR (Visitor Location Register). Register).

  FIG. 3 is a block diagram of a configuration example of the moving network device 12 of FIG. In the figure, the moving network device 12 includes a control unit 20 that controls the whole, a transmission / reception unit (TRX) 21 for transmission / reception with the node B 11, a transmission unit (TX) 22 for transmission to the UE 10, and broadband (BB) A broadband processing unit 23 that performs processing and the like is provided. That is, in the present embodiment, bidirectional communication is performed between the moving network device 12 and the Node B 11, but only downlink communication from the moving network device 12 is performed with the UE 10, and the UE 10 and the node In principle, upstream communication with B11 is performed without going through the moving network device 12.

  The moving network (MN) apparatus 12 has a function of notifying system information related to the moving network as an essential function. In addition, as an optional function used as necessary, it has a function of simply transmitting the physical channel transmitted from the Node B 11 side and a function of adding information, and as an optional function, broadcast from the MN device 12 as described later. It is assumed that a pilot channel broadcast function for notifying the UE 10 of an update of information to be performed and a function of receiving broadcast information from the Node B 11 and updating system information are provided.

  In the present embodiment, by defining special location information for the moving network, the UE 10 performs location registration using the special location information when joining the moving network. The location information in UTRAN (Universal Telescopic Radio Access Network) in 3GPP is defined by the location area LA for the circuit switch or the routing area RA for the packet switch, and the location information is managed in the core network. When receiving an incoming call, a paging request is made to the RNC 13 together with location information managed on the core network side. In response to this paging request, the RNC 13 acquires an area where an incoming call request should be notified, and performs paging on that area.

  In the present embodiment, for the sake of simplicity, the following description will be given assuming that the location area LA and the routing area RA coincide with each other, but the present invention is not limited to such conditions.

FIG. 4 is an explanatory diagram of a location information definition example corresponding to a moving network. In the figure, it is assumed that a location area LA _MN and a routing area RA _MN for one MN (moving network) coincide with each other, and are defined as, for example, a set of a plurality of LA / RAs along railroad rails. That is, in FIG. 4, the set of hatched circles is LA _MN or RA _MN , and the definition image is given by the following equation.

LA _MN / RA _MN = ΣLA _i / RA _{i where} LA = RA
2, the location information management register for managing the location of the UE 10 on the core network side, that is, the MSC 14 and the xGSN 15 side, for example, the VLR for the MSC 14, uses the location information definition for the moving network to Implement management. By using this definition, the moving network itself does not change the location registration even if the train moves, for example, and the mobile station that has joined the moving network can set LA _MN / RA _MN for the _MN at the time of subscription. It is only used to perform location registration, and there is no need to perform location registration accompanying movement.

Next, UE processing at the time of joining the moving network will be described with reference to FIGS. As described above, the UE 10 side performs location registration using the location information LA _MN / RA _MN corresponding to the moving network as described above when the user having the UE 10 gets on the train, for example. It is assumed that the registration procedure for the moving network is completed by performing the location registration.

In order to join the moving network, first, it is known that there is a moving network around the current location, that is, that it is close to the set of hatched circles as described in FIG. It is necessary to search for the value of the registration information LA _MN / RA _MN .

  Information necessary for joining the moving network is basically given as system information from the RNC 13 side in FIG. 2, and is added to the UE 10 by the moving network device 12 as necessary. Shall be.

  As a format of the system information given from the RNC 13 side through the node B11, a downlink common channel PCCPCH (primary common control physical channel) for broadcast information transmission is used as a physical channel, and a logical channel BCCH (broadcast control control channel) is used. Broadcasting to the UE 10 is performed in a format including an MIB (Master Information Block) and an SIB (System Information Block) inside the channel. In the present embodiment, generally, information related to the moving network is included in a plurality of SIBs, and this information includes information such as a scrambling code for acquiring information broadcast by the moving network device 12. To do.

  Details of such system information relating to the moving network will be described with reference to FIG. 8, and the flowchart of the moving network presence confirmation process of FIG. 5 will be described before that. In the figure, first, broadcast information in the logical channel BCCH is transmitted from the RNC 13 side of FIG. 2 to the UE 10, and the UE 10 receives SIB as broadcast information from the Node B 11 side and knows that a moving network exists in the vicinity. If it exists, it is determined whether or not it is possible to join the moving network, for example, whether or not it is going to get on the train, and if it can be subscribed, the moving network is searched, and if there is no moving network No processing is performed.

  FIG. 6 is a flowchart of the moving network search process when it is determined that the moving network can be joined. If it is determined that the moving network can be subscribed to, using the parameters included in the SIB and stored in the system information sent from the Node B 11 side as described above, the moving network broadcast information, that is, The system information added by the moving network device 12 is received. If it can be received, a procedure for joining the moving network is performed. If it cannot be received, a retry process is executed.

FIG. 7 is a flowchart of a procedure for joining a moving network. In the figure, the UE 10 receives system information broadcast from the moving network, that is, system information added by the moving network device 12, and determines whether or not to join the moving network. As will be described later, for example, when GPS information indicating a range to be subscribed to the moving network is stored in the system information, the UE 10 compares with the GPS information that the UE 10 has and whether or not it has entered the subscription range. To determine whether to join. When joining, location registration is performed using the location information LA _MN / RA _MN of the moving network, and when not joining, no processing is performed.

  5 to 7, the outline of the process for joining the moving network in the present embodiment has been described. However, in this embodiment, the moving network device 12 adds the system information sent from the node B11 side in FIG. 2. For example, GPS information indicating a subscription range for the moving network may be stored or not stored in the system information, and if not stored, the UE 10 may enter the subscription range, for example, It is also possible to receive notification of GPS information at the ticket gate of the station and determine whether to join the moving network using the GPS information.

  The GPS information indicating the range of joining the moving network for the UE 10 or the continuing range for determining the departure from the moving network is given by the system information added by the moving network device 12 or, for example, a station Since there is a great difference in whether the notification is made by the joining / leaving point information notifying device installed at the ticket gate, the case where it is notified as system information added from the moving network device 12 in the following description is the first. The embodiment of the present invention will be further described as a second example in the case where the notification is made at the ticket gate of the station, for example.

  Before entering the description of the first example, the conditions for joining the moving network in the present embodiment will be further described. There are two prerequisites for this subscription condition. The first precondition is that the UE 10 receives information indicating that the moving network exists in the vicinity as system information from the Node B 11 side, and the second precondition is that the moving network device uses the contents of the system information. 12 can receive the system information added by 12 or the information of the pilot channel sent from the moving network device 12. In the present embodiment, even if these two preconditions are satisfied, the conditions for joining the moving network are satisfied. Satisfied.

  Furthermore, as a condition for joining the moving network, individual conditions can be added to these preconditions. The first of the individual conditions is that GPS information indicating a point of joining or leaving the moving network is transmitted as system information added by the moving network device 12 or separately from the system information from the moving network device 12, for example. The information is received as the content of the pilot channel, and the GPS information of the UE 10 itself and the information match, that is, the UE 10 exists at the subscription point, and the subscription condition is satisfied when this condition is satisfied together with the above two prerequisites. Can be treated as satisfying.

  Alternatively, as the second individual condition, the GPS information indicating the subscription point is not received from the moving network device 12 side, but received from, for example, the subscription point information notification device installed at the ticket gate of the station, and received GPS information Is consistent with the GPS information that the UE 10 itself has, and the pilot pattern information from the moving network device 12, such as a pilot channel signal, can be received in a state where the reception level exceeds a certain threshold, for example, as will be described later. In addition, when this condition is satisfied together with the above two preconditions, the condition for joining the moving network can be treated as being satisfied.

  In the first individual condition, the GPS information is received from the moving network device, and in the second individual condition, the GPS information is received at the ticket gate. However, the method of receiving the GPS information is not essential. Is the essential condition. For example, GPS information may be received from the moving network device in the determination of the second individual condition.

  Next, the first embodiment will be described with reference to FIGS. FIG. 8 is an explanatory diagram of the contents of the moving network related information notification using the system information in the first embodiment, and FIG. 9 is an explanatory diagram of a location registration sequence by the UE 10 corresponding to the notification of the moving network related information.

  In the first embodiment, among the moving network related information, especially the GPS information as the joining / leaving point is added to the system information by the moving network device 12, for example, and is notified to the UE 10. In a second embodiment to be described later, for example, this GPS information is notified to the UE 10 from, for example, a joining / leaving point information notifying device installed at a ticket gate of a station without the moving network device 12 being involved. However, in the first embodiment, the notification method from the moving network device 12 to the UE 10 is not necessarily limited to being notified by adding to the system information. For example, GPS information is stored in another pilot channel. Of course, it is also possible to notify the UE 10.

  In FIG. 8, when the system information block SIB included in the downlink common channel PCCPCH for broadcast information transmission is sent from the node B11 to the moving network device 12, for example, n blocks from SIB # 1 to SIB # n are included. Contains. SIB # n is the presence / absence of the moving network as the moving network related information to be notified to the UE 10 from the Node B 11 side, the n + 1th block added by the moving network device 12 as the system information block, that is, SIB # n + 1 Includes a decoding scrambling code for the downlink common channel PCCPCH, temporal offset information, pilot pattern information, and the like.

In the moving network related information added by the moving network device 12, that is, SIB # n + 1, the LA _MN / RA _MN of the moving network (in this case, LA _i / RA _i in the set may be listed), the moving network Type, that is, information indicating whether to use GPS information and / or pilot channel to determine when to leave the moving network, GPS information of the leaving point, and changing the leaving point described later It includes a signal for notification in the case of failure.

  In FIG. 9, a system information block up to SIB # n is sent from the node B11 to the UE10 via the moving network device 12, and a system information block of SIB # n + 1 is added from the moving network device 12 to the UE10. Sent to. Correspondingly, location registration using the location information of the moving network is performed from the UE 10 to the Node B 11 side, and the location registration information is also sent to the RNC 13, MSC 14, and xGSN 15 to perform corresponding processing.

  After performing location registration using the location information of the moving network, that is, after joining the moving network, the UE 10 does not perform location registration while moving on a train, for example, on a train. Further, the moving network apparatus 12 in FIG. 2 is not involved in making and receiving calls to and from the UE 10, and making and receiving calls to the UE 10, that is, paging is performed from the MSC 14 or the xGSN 15 side via the RNC 13 and the node B11. In this paging, the UE 10 performs location registration using the location information of the moving network, that is, location information indicating a set of normal location information, so the location information of the moving network is included in all the location information in the set. It is necessary to convert and perform paging corresponding to all of the normal position information. This paging is performed in the same manner in the second embodiment to be described later, but will be described in the first embodiment as an order of description.

FIG. 10 is an explanatory diagram of a first example of a paging sequence. In this first example, the correspondence between the location information of the moving network and the normal location information in the set corresponding thereto is provided as a correspondence table on the core network side, that is, the MSC 14 and xGSN 15 side, and the MSC 14 or The xGSN 15 detects that the location information LA _MN / RA _MN # 0 of the moving network is a set composed of the normal location information LA # 0 and LA # 7, and sends it to the RNC # 1 and LA # 7 corresponding to LA # 0. RANAP (Radio Access Network Application Part): sends a paging to the corresponding RNC # 0, and in response to this, each RNC sends an RRC (to the Node B corresponding to LA # 0 and LA # 7). Radio resource control): send paging and define moving network Paging is made to the UE10 that exists somewhere in the range.

FIG. 11 is an explanatory diagram of a second example of the paging sequence. In this second example, the RNC 13 in FIG. 2 is provided with a correspondence table indicating the relationship between the location information for the moving network and the normal location information, and paging is performed using the contents of this table. That is, the RANAP: paging is sent from the MSC 14 or the xGSN 15 side to the RNC # 0 using the moving network location information LA _MN # 0, and the RNC # 0 that receives the RANAP: paging RRC: Paging is transmitted to the Node B corresponding to the location information LA # 0 and LA # 7.

  12 to 14 are examples of a correspondence table provided on the MSC 14 or xGSN 15 side corresponding to the first paging example of FIG. 10 and a registered location management table for the UE 10. FIG. 12 is an explanatory diagram of a table that serves both as a registration location management table and a correspondence table for the UE. In the figure, MN validity / invalidity indicates whether MN registration information, that is, registration location information is valid or invalid, and normal location registration information is location registration before or after the UE joins the moving network. This normal location registration information becomes valid when the MN is invalid.

  In FIG. 12, the correspondence between the location information of the moving network (MN registration information) and the LA / RA information as the normal location information is also stored, but the location information of the moving network and the normal LA / RA information are Correspondence is essentially irrelevant to UE registration, and the registration location management table for UE and the correspondence table of moving network location information and LA / RA information are separately provided as shown in FIGS. Of course it is also possible.

In the second example of paging described in FIG. 11, a registration location management table for the UE similar to that in FIG. 13 is provided on the MSC 14 / xGSN 15 side. As shown in FIG. 15, the RNC 13 stores a table indicating the correspondence between the location information of the moving network and the normal LA / RA information corresponding to each RNC. For example, the correspondence table of RNC # 0 in FIG. 11 stores LA / RA information corresponding to LA _MN # 0 and RA _MN # 0 as location information of the moving network.

  Next, update of system information during the joining of the UE 10 to the moving network will be described with reference to FIG. In FIG. 2, when updating the system information sent from the Node B 11 side to the UE 10, there are cases where the moving network device 12 is involved in the update and when it is not involved. The case where it is not involved will be described in a second embodiment described later, and here, the case where it is involved will be explained.

As described in FIG. 8, when conforming to 3GPP, the PCCPCH _{MN of} the moving network synchronized with the PCCPCH sent from the Node B 11 at the chip level is defined, and the SIB # n + 1 described above is added to the moving network individual information. 16, the UE 10 is notified from the Node B 11 by receiving only the notification information from the moving network device 12 not only when joining the moving network but also when joining the moving network as shown in FIG. The system information can be received, and the system information can be updated in the same manner. In addition, a common control channel SCCPCH (secondary common control physical channel) used for transmission of a paging signal or the like sent from the node B11 side, a PICH (paging indication channel) indicating presence / absence of incoming information, etc. Similarly, the moving network device 12 can relay the information to the UE 10 side as it is.

  Next, a method for notifying the UE 10 of joining / leaving point information from the moving network will be described. FIG. 17 is an explanatory diagram of positions of joining / leaving points with respect to the moving network. The location information of the joining / leaving point is given as fixed information when using the moving network. For example, when applied to a train, the joining / leaving point is always present somewhere in the station, and therefore can be set as moving network specific information. In FIG. 17, for example, the coordinates of the four vertices of the square of the entry are given corresponding to each entry as a joining / leaving point.

  After the UE 10 joins the moving network, it is necessary to notify the UE 10 of the leaving point information in order to determine whether to leave the moving network. In such notification of joining / leaving point information to the UE 10, there are cases where the moving network device 12 is involved or not involved. In the first embodiment, the notification method will be described assuming that the moving network device 12 is involved.

  Even when the moving network device 12 is involved in the notification of the joining / leaving point information, the location information for all of the leaving points from the moving network is notified when joining the moving network, and all the leaving point information when joining. It is conceivable to notify the information of the leaving point at a location close to the current position with the movement of the UE 10 without notification.

  When notifying all the leaving point information at the time of joining, for example, as described with reference to FIG. 8, GPS information of all leaving points is stored in SIB # n + 1 and notified to the UE 10. This leaving point GPS information is, for example, GPS information corresponding to each entry described in FIG. The UE 10 performs the leaving determination by comparing with the GPS information held by itself using these notified leaving point GPS information.

  In the case of not notifying all the leaving point information when joining the moving network, the UE 10 needs to receive the leaving point information close to the current position of the UE by continuously receiving the information notified from the moving network device 12. It becomes. For this reason, the moving network device 12 updates the departure point information according to, for example, the movement of the train. As a method for this, it is conceivable that the moving network device 12 can communicate with the node B11 and update the leaving point information triggered by communication with a nearby node B11.

  FIG. 18 is an explanatory diagram of a leaving point information update method (part 1) in the moving network device 12. In the figure, the moving network device 12 receives the leaving point information notified from each Node B 11, and detects the mismatch between the received information and the leaving point information held in the moving network device 12. Update point information. In FIG. 18, the departure point information #A is retained while the departure point information #A from the node B # 0 is received, and then the departure point information #B from the node B # 1 is received. The information is updated to the leaving point information #B.

  FIG. 19 is an explanatory diagram of the leaving point information update method (part 2). The moving network device 12 is provided with a table of departure point information corresponding to the information of cells under the control of the node B in order to determine the trigger for changing the departure point information in advance. By receiving the cell information from the node B11, update to the departure point information corresponding to the newly received cell information is performed.

  For example, at first, departure point information 15, 1F, 3F, 4B for a cell #AB under a certain node B is transmitted as notification information from the moving network device 12 to the UE 10, but for example, a train is in the area of the cell # 57. Due to the movement, the cell information is received from the corresponding node B, and the departure point information is updated to 5A, 5E, 66, 71, and 7E.

  In this way, when the moving network apparatus 12 notifies the UE 10 while updating the leaving point information, a method for the UE 10 to receive this information will be described with reference to FIGS. FIG. 20 is an explanatory diagram of a change notification method in which a notification indicating that the change of the broadcast information has occurred is included in the pilot channel. The UE 10 always observes the signal of the pilot channel, and when the change notification of the broadcast information related to the moving network is included in the pilot channel, the broadcast information that actually includes the change content, for example, described in FIG. By receiving SIB # n + 1, updated departure point information can be acquired.

  FIG. 21 is an explanatory diagram of the departure point information update sequence. In the figure, the moving network device 12 notifies the UE 10 of the change of the leaving point using the pilot channel at the time of detecting the occurrence of the leaving point change, and sends the leaving point information as the update result to the broadcast channel, for example, SIB # n + 1. It is included and sent to the UE 10 side. The UE 10 recognizes the change of the leaving point according to the content of the pilot channel, and updates the leaving point using the information in SIB # n + 1.

  In FIG. 20 and FIG. 21, the UE 10 first observes the pilot channel to detect a leaving point change notification, and receives the update result of the leaving point information included in, for example, SIB # n + 1 in response to the detection. However, when the UE 10 periodically receives broadcast information from the moving network device 12, for example, SIB # n + 1, and the leaving point information included in the block does not match the leaving point information held on the UE 10 side. It is also possible to update the leaving point information.

  Next, a second embodiment will be described. As described above, in the second embodiment, unlike the first embodiment, the UE 10 does not receive the GPS information of the joining / leaving points to / from the moving network in a manner in which the moving network device 12 is involved. The method, for example, receiving at the ticket gate of a train is basically different, and the subscription condition to the moving network may be a subscription condition in which only the coincidence detection of GPS information is added in addition to the above two preconditions. It is also possible to use a subscription condition to which a condition that the reception level of the pilot channel from the moving network device 12 is equal to or higher than a certain threshold is added in addition to this, but here, a condition related to the reception level of the pilot channel is added. The second embodiment will be described using the joining conditions.

  As described above, in the second embodiment, the condition that the reception level of the pilot channel transmitted from the moving network device 12 is equal to or greater than a certain threshold is used as the joining condition to the moving network and the trigger for leaving. For example, as an opportunity for leaving from the moving network, as described in the first embodiment, the condition may be a comparison result between the leaving point GPS information sent from the moving network device 12 and the GPS information held by the UE 10 itself, The broadcast information sent from the moving network device 12, for example, SIB # n + 1, or the condition that the pilot channel including the broadcast information change occurrence notification described in FIG. Although it may be a condition that includes both cases where broadcast information from the moving network device 12 cannot be received, a comparison between the reception level of the pilot channel and the threshold value will be described with reference to FIGS. .

  FIG. 22 is an explanatory diagram of the reception range of the pilot channel. If the moving network device 12 exists on the right side and transmits the pilot channel, for example, the reception level of the pilot channel in the circle decreases as the distance from the moving network 12 increases.

  FIG. 23 shows the pilot channel power when the horizontal axis is, for example, the position. If it is determined that the power falls below a certain threshold as an opportunity to leave the moving network, the UE 10 always receives the pilot channel from the moving network device 12 while joining the moving network. Need to be.

  FIG. 24 is an explanatory diagram of a method for setting conditions for joining a moving network in the second embodiment. In the figure, the GPS designated area as the subscription range is indicated by a rectangle, and as described in FIG. 23, the pilot channel reception area where the reception power of the pilot channel is equal to or greater than a certain threshold is indicated by a thin ellipse. . A moving network subscription area to be subscribed to the moving network is set as a range where these figures overlap. For example, when taking a train, the user with the UE 10 must be on the platform, and the pilot channel reception area from the moving network device 12 becomes wide if the user is on the platform. In addition, it is prevented that the mobile network is easily joined.

  In the second embodiment, for example, the departure point GPS information acquired at the ticket gate and the GPS information of the UE 10 are compared to determine whether to leave the moving network. The subscription continuation range can be made equal or different. A case where the subscription range and the subscription continuation range are different will be described with reference to FIGS.

  FIG. 25 is an explanatory diagram of the relationship between the subscription range to the moving network and the subscription continuation range when, for example, the platform is the subscription range and the range including the surrounding ticket gates is the subscription continuation range. For example, when joining / leaving a train moving network, it is possible to make a join determination when entering a platform as a joining range, and when leaving, it is possible to make a leave judgment at a ticket gate.

  In this way, when notifying the UE 10 of the joining / leaving point information at the gate such as the ticket gate, the joining point information at the gate where the joining to the moving network and the movement between the two moving networks are predicted, It is also possible to notify the leaving point information at a gate that is expected to leave the moving network.

  FIG. 26 is an explanatory diagram of moving network location registration for the arrangement of FIG. When the user having UE 10 changes from the train stopped on the horizontal platform in FIG. 25 to the train stopped on the vertical platform, the moving network is moving while moving around the white area around the platform. The location registration is performed using the location information of the moving network B corresponding to the platform when entering the vertical platform while leaving the moving network A corresponding to the platform in the horizontal direction without leaving the network. become. As a result, location registration by leaving the moving network can be omitted. In that case, as shown in FIG. 26, even if the UE 10 can receive the information notified from the moving network device 12, the node does not receive the notification information from the moving network device 12 while moving between platforms. Only the broadcast information from B is received.

  FIG. 27 is an explanatory diagram of the hysteresis characteristic of joining / leaving when the joining range and the joining continuation range are different as described with reference to FIG. As shown in the figure, by setting the joining point and the leaving point at different positions, the joining route to the moving network and the leaving route from the moving network differ according to the position on the route on which the UE 10 moves. Thus, the hysteresis characteristic is realized, and it is possible to prevent repeated joining / leaving that may occur when the joining range and the joining continuation range are the same.

  FIG. 28 is a flowchart of the leaving process from the moving network in the second embodiment. In FIG. 23, as described with reference to FIG. 23, the departure determination process is performed based on the condition that the reception level of the pilot channel falls below a certain threshold value and the departure area (outside the continued continuation range) by comparison of GPS information. .

  In FIG. 28, first, the reception area of the pilot channel notified from the moving network device 12 and the departure area are monitored using the GPS information. When the pilot channel cannot be received, that is, when the reception level is lower than the threshold value, it is determined whether or not the mobile station is in the leaving area. If the pilot channel is in the leaving area, the location registration with the normal location information is performed to leave the moving network. Done. When not in the departure area, the state is maintained as it is.

  If it is determined that the vehicle is in the departure area, it is determined whether the pilot channel can be received and whether the reception level is equal to or higher than a threshold value. If it cannot be received, it is removed from the moving network, that is, location registration with normal location information is performed. If the pilot channel can be received, the same state is maintained.

  FIG. 29 is an explanatory diagram of a method of updating system information when compared with FIG. 16 for the first embodiment. In the second embodiment, once the UE 10 joins the moving network, the notification of the leaving point information is performed at, for example, the ticket gate of the station, so basically the notification information from the moving network device 12, For example, it is not necessary to receive SIB # n + 1, and therefore it is only necessary to receive broadcast information from Node B11. Therefore, as shown in FIG. 29, while joining the moving network, the UE 10 can receive the update information of the system information by receiving the notification information from the node B until detecting the timing of withdrawal from the moving network. It becomes.

(Appendix 1) A mobile communication network comprising a plurality of base stations and a plurality of mobile devices,
Specific position information notifying means for giving specific position information given to a predetermined specific range to a mobile device moving within the specific range;
A mobile communication network, wherein each mobile device performs location registration with respect to a base station using the specific location information when entering the specific range.

(Supplementary Note 2) The base station transmits parameters necessary for receiving information broadcast from the specific location information notification means to the mobile device,
The mobile communication network according to supplementary note 1, wherein the mobile device receives the specific location information using the parameter.

  (Supplementary Note 3) During the period in which the mobile device performs location registration using the specific location information, call processing including outgoing / incoming calls is performed in a normal procedure without being involved in the specific location information notification means. The mobile communication network according to supplementary note 1, wherein:

  (Additional remark 4) The said specific location information notification means shows presence of the said predetermined specific range, and the pilot signal which can be used as one of the conditions of the location registration with respect to the said base station by the mobile station is received. The mobile communication network according to appendix 1, wherein the mobile communication network transmits to a mobile device.

(Supplementary Note 5) The specific location information notification means is provided in a moving network device located between the mobile device and a base station,
A moving network corresponding to the specific range is configured by the mobile device, the moving network device, and the base station,
The mobile communication network according to appendix 1, wherein the mobile device joins the moving network by location registration using the specific location information.

  (Supplementary Note 6) The mobile station receives a notification signal for searching the moving network from the base station, and uses the notification signal to transmit moving network related information including the specific location information from the moving network device. 6. The mobile communication network according to appendix 5, wherein the mobile communication network is subscribed to the moving network when received.

  (Supplementary note 7) The mobile station receives a notification signal for searching a moving network from the base station, and uses the notification signal to determine a boundary of a moving network subscription range as the specific range from the moving network device. When receiving network-related information including the indicated subscription point GPS information and the specific location information, and detecting a match between the subscription point GPS information and the GPS information possessed by the mobile device itself, the subscription to the moving network is performed. The mobile communication network according to appendix 5, characterized in that:

  (Supplementary Note 8) The mobile device receives a notification signal for searching a moving network from the base station, and receives the moving network related information including the specific location information from the moving network device using the notification signal. Further, the GPS information of the mobile station itself and the GPS information of the mobile station itself, and the GPS information of the mobile station itself, which indicates the boundary of the moving network subscription range as the specific range notified from the subscription point notification device set at the mobile network subscription gate. The mobile communication network according to appendix 5, wherein the mobile network is subscribed to the moving network when a match is detected.

(Supplementary Note 9) The mobile device receives a notification signal for searching a moving network from the base station, and uses the notification signal to determine a boundary of a moving network subscription range as the specific range from the moving network device. Receiving the moving network related information including the subscription point GPS information and the specific location information,
When the coincidence between the GPS information of the subscription point and the GPS information of the mobile device itself is detected and the level of the pilot signal further received from the moving network device exceeds a certain threshold value, the mobile network is subscribed to the moving network. The mobile communication network according to appendix 5, characterized by:

  (Supplementary Note 10) When the mobile station has received a pilot signal transmitted from the moving network device below a certain threshold value while subscribing to the moving network, the normal location information of the current location is used instead of the specific location information. The mobile communication network according to appendix 5, wherein the moving network is disconnected by performing location registration.

  (Supplementary Note 11) While the mobile station is subscribed to the moving network, it detects that the mobile station itself has departed from the subscription continuation range by comparing the departure point GPS information corresponding to the moving network subscription continuation range and the GPS information of the mobile unit itself. 6. The mobile communication network according to appendix 5, wherein the mobile network is disconnected by performing location registration using the normal location information of the current location instead of the specific location information.

(Supplementary note 12) The mobile communication network according to supplementary note 11, wherein the mobile device receives the leaving point GPS information from the moving network device.
(Supplementary note 13) The mobile communication network according to supplementary note 11, wherein the mobile device receives the separation point GPS information from a separation point information notification device provided in a specific gate.

  (Supplementary note 14) The mobile communication network according to supplementary note 11, wherein the moving network subscription continuation range is set wider than the moving network subscription range as the specific range.

(Supplementary Note 15) While the mobile network is subscribed to the moving network, the mobile station detects that the mobile station itself has departed from the subscription continuation range by comparing the departure point GPS information corresponding to the moving network subscription continuation range with the GPS information of the mobile device ,
In addition, when the reception level of the pilot signal transmitted from the moving network device falls below a certain threshold value, the location registration is performed using the normal location information of the current location instead of the specific location information, thereby leaving the moving network. The mobile communication network according to appendix 5, wherein

  (Supplementary note 16) The movement according to supplementary note 5, wherein the moving network device transmits system information in which moving network related information including the specific location information is added to system information received from the base station to a mobile device. Communication network.

  (Supplementary note 17) The mobile communication network according to supplementary note 16, wherein the mobile device receives system information transmitted from the moving network device while joining the moving network.

  (Supplementary Note 18) The mobile device receives system information transmitted from the moving network device at the time of joining the moving network, and receives system information transmitted from the base station after joining the moving network. The mobile communication network according to appendix 16, wherein:

  (Supplementary Note 19) The mobile device receives a notification signal for searching for a moving network from the base station, and uses the notification signal to transmit the specific location information from the moving network device and a subscription after joining the moving network. The mobile communication network according to appendix 5, wherein the moving network-related information including all the leaving point information indicating the boundary of the continuation range is received.

(Supplementary note 20) The mobile device receives a notification signal for searching a moving network from the base station, and uses the notification signal to transmit the specific location information from the moving network device and the current moving network device. Receiving the moving network related information including the leaving point information indicating the boundary of the continuation range after joining the moving network received from the base station corresponding to the position of
When the moving network device receives new leaving point information from a new base station, the moving network device updates the leaving point information included in the moving network related information and transmits the updated moving network related information to the mobile device. The mobile communication network according to appendix 5.

(Supplementary Note 21) The moving network device further transmits a pilot signal indicating that the leaving point information has been updated to the mobile device,
The mobile communication network according to appendix 20, wherein the mobile station that has received the pilot signal searches the moving network related information sent from the moving network apparatus to obtain updated leaving point information.

(Additional remark 22) The cell corresponding | compatible leaving in which the said moving network apparatus stores the leaving point information which shows the boundary of the subscription continuation range after the moving network subscription in this cell corresponding to the cell supported by each of the said base station Further comprising point information storage means,
The mobile device receives a notification signal for searching a moving network from the base station, and uses the notification signal to correspond to the specific location information from the moving network device and the current location of the moving network device. Receiving the moving network related information including the leaving point information to be
When the moving network device enters a cell supported by a different base station while moving within the specific range, the leaving point information corresponding to the different cell is stored using the stored contents of the cell corresponding leaving point information storage means. The mobile communication network according to appendix 5, wherein the moving network-related information including: is transmitted to the mobile device.

(Supplementary Note 23) The moving network device further transmits a pilot signal indicating that the leaving point information has been updated to the mobile device,
23. The mobile communication network according to appendix 22, wherein the mobile device that has received the pilot signal searches for moving network related information sent from the moving network device to obtain updated leaving point information.

  (Supplementary note 24) The mobile communication network according to supplementary note 1, wherein the specific location information is defined as a set of a plurality of normal location information corresponding to a plurality of areas included in the specific range.

(Supplementary Note 25) In the core network connected to the mobile communication network,
The mobile device according to claim 1, further comprising mobile device location information management means for managing the location of the mobile device using the specific location information in response to the location registration performed from the mobile device to the base station side. Communication network.

(Supplementary Note 26) In the core network,
26. The mobile communication according to appendix 25, further comprising position information correspondence managing means for managing correspondence between the specific position information and a plurality of normal position information respectively assigned to a plurality of ranges constituting the specific range. network.

  (Supplementary note 27) The core network searches a plurality of normal position information corresponding to the specific position information registered by the mobile device in paging to the mobile device, using the stored contents of the position information correspondence managing means, 27. The mobile communication network according to appendix 26, wherein data for paging to a mobile device is sent to a base station side corresponding to the plurality of normal position information in response to the search result.

(Supplementary note 28) In a radio network controller for connecting the mobile communication network and a core network,
26. The mobile communication network according to appendix 25, further comprising position information correspondence managing means for managing correspondence between the specific position information and a plurality of normal position information respectively assigned to a plurality of ranges constituting the specific range. .

  (Supplementary Note 29) The radio network controller manages the plurality of normal position information corresponding to the specific position information registered by the mobile device as the target of paging notified from the core network side as the position information correspondence management The mobile station according to appendix 28, wherein a search is performed using the stored contents of the means, and data for paging to the mobile device is sent to the base station side corresponding to the plurality of location information in accordance with the search result. Communication network.

(Supplementary Note 30) In a core network connected to the mobile communication network,
Corresponding to the specific location information used for location registration performed from the mobile device to the base station side, using a plurality of normal location information respectively assigned to a plurality of ranges constituting the specific range, the mobile device The mobile communication network according to appendix 1, further comprising mobile unit location information management means for managing the location of the mobile station.

DESCRIPTION OF SYMBOLS 1 Base station 2 Mobile device 3 Specific location information notification means 4, 12 Moving network apparatus 10 User equipment (UE)
11 Node B (Radio base station equipment)
13 Radio Network Controller (RNC)
14 Mobile Switching Center (MSC)
15 xGSN, eg Gateway GPRS Support Node (GGSN)
20 control unit 21 transmission / reception unit 22 transmission unit 23 baseband (BB) processing unit

Claims (4)

A condition for the mobile terminal to leave from a state of restricting location registration using location information corresponding to a specific range including a plurality of location areas or routing areas from any of a plurality of radio base stations arranged at different positions. Receiving means for receiving information used for determining whether to satisfy;
Transmitting means for transmitting the information received by the receiving means to the mobile terminal ;
Control means for performing control to update the information transmitted by the transmitting means in response to a change in the information received by the receiving means;
A wireless device comprising: A correspondence relationship between the cell information and information used for determining that the condition that the mobile terminal leaves from a state in which location registration using location information corresponding to a specific range including a plurality of location areas or routing areas is regulated is satisfied. Storage means for storing;
Receiving means for receiving cell information from a radio base station;
Control means for performing control to update information to be transmitted to information corresponding to the changed cell information and to transmit to the mobile terminal when it is detected that the cell information received by the receiving means has changed;
A wireless device comprising: A condition for the mobile terminal to leave from a state of restricting location registration using location information corresponding to a specific range including a plurality of location areas or routing areas from any of a plurality of radio base stations arranged at different positions. Receive information used to determine that
Transmitting the received information to the mobile terminal ;
Control to update the information to be transmitted according to the received change in the information,
A transmission method characterized by the above. Receive cell information from the radio base station,
When it is detected that the received cell information has changed, the mobile terminal leaves the state that restricts location registration using the cell information and location information corresponding to a specific range including a plurality of location areas or routing areas. Based on the correspondence with the information used to determine that the condition is satisfied, control the information to be transmitted to the information corresponding to the changed previous cell information and transmitted to the mobile terminal.
A transmission method characterized by the above.