JP2873323B2 - Location registration method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is used for a location registration system of a cellular mobile communication system including a plurality of wireless base stations.

[Conventional technology]

Conventionally, in the location registration method, a location registration station for performing location registration of a mobile device is fixedly determined, and the mobile device performs location registration with the determined location registration station. In addition, upon receiving a call, a method is employed in which the location registration area where the mobile station is located is known by searching for the determined location registration station, and a general call is made to that area.

[Problems to be solved by the invention]

However, such a conventional location registration method has a disadvantage that the location registration memory configurations of all location registration stations must be changed when the location registration area configuration is changed or added.

An object of the present invention is to solve the above-mentioned drawbacks, and an object of the present invention is to provide a location registration system capable of avoiding remodeling of all location registration stations by adding or changing some location registration zones.

[Means for solving the problem]

The present invention provides a plurality of wireless base stations arranged to hierarchically divide a service area into a relatively large-scale wireless zone and a relatively small-scale wireless zone including the relatively large-scale wireless zone. And a location registration zone is set corresponding to one or a plurality of adjacent radio zones for each hierarchy, and a mobile switching center provided corresponding to each location registration zone; A location registration station provided as a, a gateway exchange connected between the fixed network and the highest layer mobile switching center, and a location registration system comprising a mobile station moving in the service area, The mobile station includes means for providing information of the location registration zone in which the mobile station is located and the mobile station number to the mobile switching center corresponding to the zone, wherein each of the mobile switching centers is provided with the given location registration zone information. And a means for giving the mobile station number to the corresponding location registration station, wherein each of the location registration stations sequentially corresponds to the location registration station of the upper layer, if any, if the location registration station of the upper layer exists. Means for assigning a location registration zone in which the mobile station is located and the mobile station number, and registering the given mobile station number based on location registration zone information given from the mobile switching center or a lower layer location registration station And means for performing the operation.

Further, in the present invention, the mobile device sets the moving speed in a step-by-step manner, and associates the location registration zone information and the mobile device number in the area selected based on the set moving speed with the zone. Means for providing to the mobile switching center.

Further, according to the present invention, when the gateway exchange receives an incoming call to the mobile station, the gateway exchange searches for a location registration station of the highest layer, and when the location registration is performed, the location registration is performed via the corresponding mobile exchange station and the radio base station. A general call is made in the location registration zone specified, and if it is indicated that it is registered in the lower layer location registration office, the lower layer location registration office is searched through the corresponding mobile exchange to respond. Means for performing simultaneous paging only in a location registration zone where location registration is performed via a mobile switching center and a radio base station.

An example in which the size of the zone is multi-layered is described in JP-B-64-7707. In this method, a communication channel is divided into groups, and each group is associated with a zone having a different area. When the moving speed of the moving object is high, a zone having a larger area is determined than when the moving speed is low. In this case, the control station manages all the location registration zones, but in the present invention, the location recording station only needs to manage the location registration zone corresponding to the station, and the location registration station also has a hierarchical structure. Thus, the feature is that the location registration memory configuration of the location registration station of each hierarchy is made independent.

[Action]

The mobile station provides information on the location registration zone in which the mobile station is located and the mobile station number to the mobile switching center corresponding to the zone. Each mobile switching center gives the given location registration zone information and mobile station number to the corresponding location registration office. If there is a higher-level location registration station, each location registration station sequentially sends the upper-level location registration station information on the location registration zone in which the mobile station corresponding to the station is located and the mobile station number. And registers the given mobile station number based on location registration zone information given by the mobile switching center or a lower-level location registration office.

Further, the mobile station sets the moving speed stepwise, and provides the information of the location registration zone in which the mobile station is located and the mobile station number selected based on the set moving speed to the mobile switching center corresponding to the zone.

Further, when a call is received by the mobile station, the gateway exchange searches for a location registration station in the highest layer, and when the location is registered, the location registration zone registered through the corresponding mobile switching station and the radio base station. A paging is performed at, and if it is indicated that the mobile station is registered with the lower layer location registration office, the lower layer location registration office is searched through the corresponding mobile exchange, and the corresponding mobile exchange office and radio station are searched. Simultaneous paging is performed only in the location registration zone where the location is registered via the base station.

As described above, it is possible to avoid remodeling all the location registration stations by adding and changing some location registration zones.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration of a wireless zone and a location registration zone of a location registration system according to an embodiment of the present invention. FIG. 2 is a diagram showing a station configuration of the location registration system of the present invention. In FIG. 1 and FIG. 2, the location registration method is based on the assumption that the service area provided in the service area is a radio zone RZ _a11 , RZ _a12 , RZ _a21 , RZ _a22 of a relatively large scale, and this relatively large scale. Numerous wireless base stations BS _a11 , which are arranged so as to be hierarchically divided into relatively small-scale wireless zones RZ _{b11 to} RZ _{b13 including} the wireless zones RZ _a11 , RZ _a12 , RZ _a21 , and RZ _a22 . BS _a12 , BS _a21 , BS _a22 , BS _{b11 to} BS _b13 ,
Each hierarchical location registration in response to one or a plurality of adjacent radio zones for each zone _{LZ a1, LZ a2, LZ b1} , LZ b2 is set, the respective location registration zone _{LZ a1, LZ a2, LZ b1} , LZ Mobile switching centers AMS1, AMS2 provided corresponding to _b2 , and the location registration office HM provided corresponding to each mobile switching office AMS1, AMS2.
1, HM2, the gateway exchange GX connected between the fixed network and the top layer mobile switching center AMS1, and within the service area
A mobile device M that moves RZ _a11 , RZ _a12 , RZ _a21 , RZ _a22 , and RZ _{b11 to} RZ _b13 is provided.

Here, a feature of the present invention is that the mobile station M includes means for giving information on the location registration zone where the mobile station is located and the mobile station number to the mobile switching center corresponding to the zone, and each mobile switching station AMS1, AMS2. Includes means for giving the given location registration zone information and the mobile unit number to the corresponding location exchange, and the location registration office HM2 performs the mobile operation based on the location registration zone information given from the mobile exchange AMS2. Means for registering the machine number and the location registration office HM1 of the higher layer
Means for giving the location registration zone information and the mobile station number where the mobile station M corresponding to the station is located, and the location registration station HM1 performs location registration given by the mobile switching center AMS2 or the location registration station HM2. It is intended to include means for registering a given mobile station number based on zone information.

Further, the mobile unit M is means for setting the moving speed in a stepwise manner, and the location registration zone information and the mobile unit number which are located based on the set moving speed are registered in the mobile switching center corresponding to the zone. Means for providing

Further, the gateway exchange GX searches the location registration station AMS1 of the uppermost layer when the mobile station M receives an incoming call, and when the location is registered, the location is registered via the corresponding mobile exchange and the radio base station. A general call is made in the location registration zone, and if it is indicated that the mobile station is registered in the lower layer location registration office HM2, the lower layer location registration office HM2 is searched through the corresponding mobile switching center AMS2. Means for performing a paging call in a location registration zone registered in location via the corresponding mobile switching center AMS2 and radio base station.

The operation of the position registration system having such a configuration will be described. FIG. 3 is a diagram showing a method of setting a memory of a location registration station of the location registration system of the present invention.

In FIG. 1, RZ _a11 , RZ _a12 , RZ _a21 , and RZ _a22 are large wireless zones, and RZ _b11 , RZ _b12 , and RZ _b13 are small wireless zones and cover the inside of the wireless zone RZ _a12 .

LZ _a1 , LZ _a2 , LZ _b1 , LZ _b2 are location registration zones, and location registration zone LZ _a1 is location registration zone LZ _b1 and location registration zone LZ.
_b2 and the location registration zone LZ _b2 and the wireless zone RZ
_a12 is set in the same area.

FIG. 2 shows an example of a station configuration, in which AMS1 and AMS2 are mobile switching centers, and BS _a11 , BS _a12 , BS _{b11 to} BS _{b13 and a} radio base station, respectively, a radio base station BS _a11 and a radio zone RZ _a11. When,
..., the radio base station BS _b13 and the radio zone RZ _b13 correspond. _Further , the radio base station BS _axx covering the large radio zone RZ _axx is accommodated in the mobile switching center AMS1, and the mobile switching center AMS2 corresponding to a lower station of the mobile switching _{center AMS1} covers the small radio zone RZ _bxx . Radio base station BS _bxx is accommodated.

HM1 and HM2 are location registration offices, and location registration signals with the mobile switching centers AMS1 and AMS2 are transmitted through a common channel signal network. The number of the location registration zone LZ _a1 (LZ _a1 ) is the wireless zone RZ _a11 , RZ _a12
, And the number (LZ _b2 ) of the location registration zone LZ _b2 is also broadcast in the radio zones RZ _{b11 to} RZ _b13 .

The location registration office HM1 manages the large location registration zones LZ _a1 and LZ _a2 , and the location registration office HM2 manages the small location registration zones LZ _b1 and LZ
Manage Z _b2 . As described above, the location registration zone and the wireless zone are configured in a hierarchical manner, and the mobile device M does not move much when the mobile device M is carried when both the large wireless zone and the small wireless zone can communicate with each other. Sometimes, a call is made in a small wireless zone, and when a moving speed such as moving with a car is high, a call is made in a large wireless zone. As a result, a large number of mobile units M of the portable model can be accommodated in a small wireless zone, and the number of times of channel switching and the number of position registrations during communication of the mobile unit M in the automobile mode can be reduced.

Hereinafter, an example of the position registration method based on the difference in the moving speed of the mobile device will be described. As an initial state, the mobile station M is located in the wireless zone RZ _b11 and sets the location registration zone LZ _b2 to the location registration station HM2.
Suppose you have registered for The mobile device has a timer that measures a predetermined time and a counter that counts up each time a received radio wave changes, and the radio base stations BS _{b11 to} BS of the radio zones RZ _{b11 to} RZ _b13 of the location registration zone LZ _b2. Monitor the determined radio frequency of _b13 , and in a predetermined time the radio zone RZ
_{b11 to} RZ _b13 have been moved a specified number of times or more.
Knowing that the strongest radio wave out of the radio waves of _{b11 to} BS _b13 has changed, a large location registration zone using an access chance to the radio base station BS _a12 of the large radio zone RZ _a12
Register LZ _a1 with the location register HM1. In this way, the mobile station M constantly monitors the movement between the wireless zones, so that the position registration zone having the optimal size can be registered. FIG. 3 shows a memory setting method of the location registration office.
As described above, the location registration office HM1 has the location registration zones LZ _a1 , LZ
Manage _a2, position registration stations HM2 manages the location registration zone LZ _b1, LZ _b2 in the position registration zone LZ _a1.

When the mobile device M registers the location registration zone LZ _b2 ,
Using the access channel of the wireless base station BS _{b11 in} the wireless zone RZ _b11 in which the mobile station is located, a location registration signal including the mobile station number and the location registration zone number (LZ _b2 ) to be registered is transmitted.
Location registration signal is received by the wireless base station BS _b11, is transmitted to the mobile switching center AMS2, further sent to the location registration station HM2 through the common channel signaling network. The location registration office HM2 registers this mobile station number in the location registration zone number (LZ _b2 ), and this mobile station number has been registered in the location registration zone number (LZ _b1 , LZ _b) .
_In the case of a new registration not registered in _b2 ), a location registration signal including the mobile station number and the location registration zone number (LZ _a1 ) is transmitted to the location registration station HM1 through the common channel signal network.

Similarly, the location registration office HM1 uses the location registration zone number (LZ _a1 )
The mobile station number and the fact that the mobile terminal is located in the location registration zone LZ _bx under the location registration zone LZ _a1 are registered. If the mobile device M subsequently starts moving in the automobile mode, and transmits a location registration signal to the wireless base station BS _a12 using the access channel of the wireless zone RZ _{a12 in} the location registration zone LZ _a1 , the location registration signal Is transferred to the location register HM1 via the mobile switching center AMS1. The location registration office HM1 registers the mobile device number in the location registration zone number (LZ _a1 ), and also knows that this mobile device number was previously registered in the location registration zone LZ _bx under the location registration zone LZ _a1 , Location registration office HM2
A location registration deletion signal is transmitted to the location registration station HM2 to delete the location registration information of the location registration zone number (LZ _b2 ) in the location registration station HM2, thereby avoiding double registration of the mobile station M.

Next, when there is an incoming call to the mobile unit M, the gateway exchange GX with the fixed network inquires the location registering station HM1 of this mobile unit number via the common channel signaling network. Therefore,
When the gateway exchange GX is found to be in the location registration zone LZ _bx under the location registration zone LZ _a1 ,
A call path is connected to the mobile switching center AMS1 belonging to LZ _a1 . The mobile switching center AMS1 queries the mobile station number of the location registering station HM2, and when the mobile station switching center AMS1 knows that the mobile station is located in the location registering zone LZ _b2 , the mobile switching center AMS2 to which LZ _b2 belongs belongs. with connecting, using a paging channel of a wireless base station BS _a12 of radio zones RZ _a12 is the same wireless area location registration zone LZ _b2, performs paging of the mobile station M. The mobile station transmits a mobile station response signal to the radio base station BS _b11 using the access channel of the radio zone RZ _b11 which is the _visited zone, and thereafter, the radio base station BS _b11 → the mobile switching center AMS2 → the mobile switching station AMS1 → Start communication using the communication path of the gateway exchange GX.

As described above, in the present embodiment, the location registration zone is configured in a hierarchical manner in correspondence with the wireless zone having a hierarchical configuration, so that, for example, even if a location registration zone number (LZ _b3 ) is added in the location registration station HM2. In order not to affect the location registration office HM1, the addition and change of the location registration zone accompanying the addition and change of the wireless zone of each layer can be dealt with only by the location registration office concerned.

〔The invention's effect〕

As described above, the present invention has an excellent effect that it is possible to avoid remodeling all the location registration stations by adding and changing some location registration zones.

In particular, in a large-scale mobile communication system where the small zone is several tens of meters and the large zone covers the whole of Japan, changes in the location registration offices throughout Japan may be made by changing the small zone configuration in some areas. Doing so is a very inflexible system, and the effect of applying the present invention is great.

In addition, for a mobile station in the automobile mode, only the mobile switching center and the location registration station in the highest layer need to be accessed. There is an advantage that connection control can be performed regardless of the station.

Further, by performing a simultaneous call to a mobile station located in a small zone from a base station in a large zone above the mobile station, complicated control for performing a simultaneous call from a plurality of base stations in the location registration area (same frequency call) Phase synchronization between base stations at the time).

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a wireless zone and a location registration zone of the location registration system of the present invention. FIG. 2 is a diagram showing a station configuration of the location registration system of the present invention. FIG. 3 is a diagram showing a method of setting a memory of a location registration station of the location registration system of the present invention. AMS1, AM2: Mobile switching center, BS _a11 , BS _a12 , BS _a21 , B
S _a22 , BS _b11 -BS _b13 … Wireless base station, HM1, HM2… Location registration station, GX… Gateway exchange, LZ _a1 , LZ _a2 … Large location registration zone, LZ _b1 , LZ _b2 … Small location registration zone, M…
Mobile station, RZ _a11 , RZ _a12 , RZ _a21 , RZ _a22 ... large wireless zone, RZ _{b11 to} RZ _b13 ... small wireless zone.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04B 7/24-7/26 H04Q 7/00-7/38

Claims (3)

(57) [Claims] A plurality of radios respectively arranged so as to hierarchically divide a service area into a radio zone of a relatively large scale and a radio zone of a relatively small scale containing the radio zone of this relatively large scale. A base station, a location registration zone is set corresponding to one or a plurality of adjacent radio zones for each hierarchy, and a mobile switching center provided corresponding to each location registration zone; A location registration station provided corresponding to the above, a gateway exchange connected between the fixed network and the highest layer mobile switching center, and a mobile station moving within the service area. The mobile station includes means for providing information on the location registration zone in which the mobile station is located and the mobile station number to the mobile switching center corresponding to the zone; Means for providing a zone and a mobile station number to a corresponding location registration station, wherein each of the location registration stations sequentially corresponds to the location registration station of the upper layer, if any, if the location registration station of the upper layer exists. Means for providing location registration zone information where the mobile station is located and the mobile station number, and the given mobile station number based on location registration zone information given from the mobile switching center or a lower layer location registration station. Means for registering a location. 2. The mobile device according to claim 1, further comprising: means for setting the moving speed in a stepwise manner, and information on the location registration zone in which the mobile station is located based on the set moving speed and the mobile device number corresponding to the zone. 2. A location registration system according to claim 1, further comprising means for providing the location information to a mobile switching center. 3. The gateway exchange searches for a location registration station of the highest layer when the mobile station receives a call, and when the location is registered, the location is registered via the corresponding mobile exchange station and the radio base station. Paging is performed in the location registration zone, and if it is indicated that the location registration is registered in the lower layer location registration office, the lower layer location registration office is searched through the corresponding mobile exchange to respond. 2. The location registration system according to claim 1, further comprising means for performing a paging call limited to a location registration zone for which location registration is performed via a mobile switching center and a radio base station.