JP3059090B2 - Mobile communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication device, and more particularly to a location registration / paging system in mobile communication.

[0002]

FIG. 9 shows a system configuration of a conventional mobile communication system. In FIG. 9, reference numeral 1 denotes a mobile communication control station, which is connected to an exchange via a fixed network. Reference numeral 2 denotes a wireless base station, which is connected to the mobile communication control station 1 by wire. Reference numeral 3 denotes a mobile device, which is wirelessly connected to the wireless base station 2. Reference numeral 4 denotes a wireless zone which is a range where radio waves of one wireless base station 2 can reach. Reference numeral 5 denotes a location registration area which is constituted by a plurality of adjacent wireless zones 4 and in which the same location registration is effective. Reference numeral 6 denotes a service area which is composed of a plurality of location registration areas 5 and is an area where one mobile communication control station 1 can control.

Each radio base station 2 reports a code number unique to the location registration area 5 in which the radio base station 2 is located in its own radio zone. When the mobile station 3 moves to the radio zone 4, the code number changes. Then, location registration control is performed again. That is, the mobile device 3 transmits a location registration request to the radio base station 2, and the base station 2 updates the location registration code in the home memory register in the mobile communication control station 1. When a communication request is issued to the mobile device 3 from the fixed network side, the mobile communication control station 1 uses the position registration code of the home memory register to
The mobile station 3 knows the location registration area where the mobile station 3 is located, transmits a paging signal from the base station 2 in the area, and receives a response from the mobile station 3 so that the mobile station 3 is located. The wireless zone 4 to be connected is specified, and connection control is performed.

[0004] In the above-mentioned system, if the zone is made smaller in order to cope with the increase in the subscriber density, the traffic for the location registration control increases more than the connection control. On the other hand, if the location registration area is increased in order to reduce the location registration control, the area of the paging is increased, and the traffic for connection control is increased. Therefore, the size of the location registration area is determined to be an optimal size in consideration of the traffic of both the paging and the location registration.

[0005]

However, in the above-described conventional location registration / paging system, when mobile stations that move only in a narrow range or mobile stations that move in a very wide range are mixed, individual mobile stations are required. There has been a problem that an optimal size of the location registration area corresponding to the mobile device cannot be set. Further, even if the size of the location registration area is optimized, there is a problem that traffic for location registration concentrates on the wireless zone at the boundary of the location registration area.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a mobile communication device capable of reducing location registration traffic and paging traffic.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention reduces a location registration traffic by setting a location registration area according to the moving characteristics of each mobile unit, and also controls mobile communication control. The paging traffic in the location registration area is controlled based on the passage information and the time information of the mobile station in the station, thereby reducing paging traffic.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention comprises a base station wirelessly connected to a mobile station, and a control station connected to a plurality of base stations by wire, wherein the base station comprises: At the time of installation, an identifier of the own base station and surrounding base station identifiers are held as information, and the mobile station has an identifier information notifying unit for notifying the identifiers in its own wireless zone. A location registration necessity determining means for searching the location registration area table from the identifier to determine the necessity of location registration, and, when location registration is required, information on the number of times of passing through the wireless zone in the location registration area in the location registration request message A location registration request transmitting means for additionally transmitting the location registration information; a pass count means for counting the number of times the mobile station passes through the wireless zone when location registration is unnecessary; and a location registration area table upon receiving a location registration completion. A location registration area table updating means for adding the base station identifier broadcasted in the broadcast information to update the accumulation of the number of passes, and a pass count reset means for initializing the pass count and the pass count counter of the location registration area table. And the base station reports its own identifier and the surrounding base station identifiers within its own wireless zone,
If the base station identifier obtained in the broadcast information is not in its own location registration area table, the mobile station passes a radio zone indicating to the control station via the base station which radio zone the mobile station is located in. By transmitting the number-of-times information to the location registration request message and transmitting the location registration request message, it is possible to have a location registration area according to the movement characteristics of the mobile device, and it is possible to reduce the location registration traffic.

[0009] According to a second aspect of the present invention, a control station that receives a location registration request from a mobile station via a base station includes:
The base station identifier for the new location registration request and the base station identifiers around it are added to the general paging area table of the corresponding mobile station, and the number of times of passage is determined from the number of times of passage added to the location registration request message. The paging area update means for updating the accumulation, sorting in descending order of the number of passages, grouping by the specified number from the top of the table, and prioritizing paging, and receiving a call from the fixed network to the mobile station. Means for performing simultaneous paging in order of the grouped priorities in the case where the control station transmits the location registration area table for each mobile station to the number of times included in the location registration request message. From the information, arranged in the order of the base station identifier of the number of times the mobile device was located,
By prioritizing the general paging by grouping by the specified number from the top of the table and performing the general paging sequentially in that order, it is possible to reduce the general paging traffic.

According to a third aspect of the present invention, when the mobile station and the control station update the location registration area table and the paging area table, respectively, the number of base station identifiers that can be registered in each table is limited. Values, and the values exceeding the threshold value are deleted in ascending order of the number of passes, excluding the base station identifier added at that time. Thus, it is possible to reduce the location registration traffic and the paging traffic.

According to a fourth aspect of the present invention, when the number of times of passage of the mobile device counts the number of times of passage, the passing time at that time is registered in a position registration area table, and the position registration request transmitting means is registered. When location registration is required, the number of times of passage and the passing time information at that time are added to the location registration request message and transmitted, and the location registration area table updating means of the mobile station and the paging area updating means of the control station are respectively provided. When updating the table, a threshold value is set for the number of base station identifiers that can be registered in each table, and for those exceeding the threshold value, the base station identifier added at that time is excluded, and the number of times of passage is accumulated. If the accumulation of the number of passages is the same in the order of smaller numbers, the deletion is performed in the order of older passage times, and the size of the table is optimized. Ri, it is possible to reduce location registration traffic and paging traffic.

(Embodiment 1) FIG. 1 shows a configuration of a mobile communication device according to a first embodiment of the present invention. In FIG. 1, reference numeral 11 denotes a mobile device, which is wirelessly connected to a base station 21. The base station 21 is connected to a control station 26 by wire, and the control station 26 is connected to a fixed network. In the mobile device 11, reference numeral 12 denotes a location registration area table,
Numeral 3 is a passage count counting means, 14 is a position registration necessity judging means, 15 is a position registration request transmitting means, 16 is a position registration area table updating means, 17 is a passage number reset means, 1
8 is a call responding means, 19 is a receiving means, and 20 is a transmitting means. In the base station 21, reference numeral 22 denotes identifier information including an identifier of a surrounding base station and an identifier of its own base station.
Is identifier information notifying means for notifying the identifier information 22,
Reference numeral 24 denotes a transmitting unit, and 25 denotes a receiving unit. In the control station 26, reference numeral 27 denotes a general paging area table for each mobile station 11, and reference numeral 28 denotes a general paging area updating means.
Reference numeral 9 denotes a simultaneous paging means.

FIG. 2 illustrates a change in the service area before and after the update of the mobile station 11 in the present embodiment. The number in each square indicates an ID number that is an identifier of each base station. The location registration area 33 of the mobile device 11 in the service area 31 before the update is a base station ID 101
1, 1012, 1013, 1021, 1022, 102
3, 1031, 1032, 1033, 1034, 104
2, 1043, 1044, 1052, 1053, 105
4 of each base station. Reference numeral 34 denotes a base station ID group of the destination base station.

The operation of the mobile station 11, the base station 21, and the control station 26 when the mobile station 11 in the wireless zone of the base station ID 1023 moves to the wireless zone of the base station ID 1035 will be described below. When the base station 21 with the base station ID 1035 is installed, in addition to its own ID 1035, the base station IDs 1024, 1025, 102
6, 1034, 1036, 1044, 1045, 104
6 has the identifier information 22 (34) consisting of six. When the mobile station 11 enters the area of the base station 21, its identifier information 2
2 is transmitted by the identifier information notification means 23 through the transmission means 24 into the own wireless zone. The mobile device 11 having received the notification information by the receiving means 19 determines whether or not the position registration is necessary by the position registration necessity determining means 14. Here, since the base station ID 1035 included in the broadcast information is not in the location registration area 33 of the mobile device 11, the location registration necessity determining unit 14 determines that location registration is necessary, and the location registration request transmitting unit 15 Start The position registration request transmitting means 15 refers to the position registration area table 12 and
The number of times the mobile device 11 has passed in the location registration area 33 at that time in each wireless zone is added to the location registration request message, and transmitted to the base station 21 via the transmission unit 20. The information on the number of times of passage indicates in which wireless zone the mobile device 11 is located.

FIG. 3 shows an example of the location registration area table 12 held by the mobile device 11. The location registration area table 41 includes a base station ID in the location registration area 33 of FIG. 2, and the cumulative number of passes and the number of passes in the wireless zone. When receiving the identifier information from the base station 21 in the same location registration area 33, the location registration necessity determination means 14 determines that location registration is not necessary, and
3 is started, and the number of passages in the position registration area table 12 (41) is counted up by the passage number counting means 13.

The base station 21 receiving such a location registration request by the receiving means 25 transmits the request to the paging area updating means 28 of the control station 26. The paging area updating means 28 first retrieves the paging area table 43 for the mobile station 11 from the paging area table 27, as shown in FIG. The paging area table 43 has the same base station ID and the same number of passages as the location registration area table 41 of the mobile device 11 shown in FIG. 3, and the base station IDs are arranged in descending order of the number of passages. Next, paging area update means 2
Reference numeral 8 denotes a base station I in a wireless zone targeted for a paging request.
D1035 and 1024 excluding the base station IDs surrounding the same that overlap with the previously registered wireless zone among the base station IDs;
The base station ID group 44a including 1025, 1026, 1036, 1045, and 1046 is added to the location registration area table 43, and the number of passes included in the location registration request message is accumulated. Reference numeral 44 denotes the location registration area table updated in this way, and the hatched portion is the updated base station ID.

The paging area update means 28 includes a base station I
When the update and addition of D are completed, the cumulative number of passages is sorted next, and the base station IDs in the paging area table 44 are rearranged in descending order of the cumulative number of passages. Reference numeral 45 denotes a paging area table rearranged in this manner. Also,
If the number of base station IDs that can be registered is determined by the threshold value, the excess of the threshold value is smaller for the portion exceeding the threshold value except for the base station ID portion 44a added at that time. Delete them in order. Then, grouping is performed for each specified number from the top of the general call area table 45, here, every four, such as 45a to 45f,
Prioritize for paging. When the paging area update means 28 finishes updating the paging area table 27, the paging area update means 28 transmits a location registration completion message to the mobile device 11 via the transmitting means 24 of the base station 21.

When the mobile unit 11 receives the location registration completion message through the receiving unit 19, the mobile unit 11 transmits it to the pass count resetting unit 17 and the location registration area table updating unit 1.
Notify 6. Location registration area table updating means 16
The base station IDs 1046, 1045, and 103 are stored in the location registration area table 12 based on the identifier information from the base station 21.
6, 1035, 1026, 1025, and 1024 are added, and the number of passes is accumulated. Passage resetting means 1
7 clears the number of times of passage in the position registration area table 12 and resets the counter of the number of times of passage counting means 13. The location registration area table 42 of FIG. 3 shows the contents after the update, and the base station I in which 42a is added is shown.
This is the part D, and the position registration area 35 in FIG. 2 is the updated position registration area. Also at this time, if the number of base station IDs that can be registered is determined by the threshold value, the excess of the threshold value except for the base station ID portion 42a added at that time is passed. Deletion is performed in ascending order of the count value.

After the location registration of the mobile station 11 in the base station ID 1035 is completed, the mobile station 11 is sent from the fixed network to the control station 26.
, The control station 26 sequentially retrieves the corresponding paging area table 27 by the paging means 29. In the paging area table 27, as shown in the paging area table 45 in FIG. 4, the paging priority is set for each of the specified numbers by the paging area updating means 28. , Paging is performed via the base station 21 in order from the upper group 45a in this table. When the mobile device 11 is located in the wireless zone of the base station included in the general call, the call response means 18 transmits a response to the control station 26 via the base station 21. When receiving the response from the mobile device 11, the control station 26 terminates the general paging, and if there is no response, performs the general paging to the group of the next priority.

As described above, according to the present embodiment, base station 21 holds the identifier of its own base station and the identifiers of surrounding base stations as identifier information 22 at the time of installation, and stores the identifier information in its own wireless zone. Identifier information notifying means 2 for notifying 22
3, the mobile station 11 searches the location registration area table 12 from the base station identifier of the received broadcast information to determine the necessity of location registration, and A location registration request transmitting means 15 for adding the number of times of passing through the wireless zone in the location registration area to the location registration request message and transmitting the location registration request message; and, when location registration is unnecessary, the mobile device 11 passing through the wireless zone. Passing number counting means 13 for counting the number of times of passing, and a position registration area table updating means for adding the base station identifier notified by the notification information to the position registration area table 12 upon receiving the position registration completion, and updating the cumulative number of passing times. 16 and the pass count resetting means 17 for initializing the pass count and pass count counting means 13 of the position registration area table 12. It is possible to set the 11 position registration area corresponding to the movement characteristics of the. For this reason, the mobile device is generally considered to be used in a location registration area within its own movement characteristics, and therefore, location registration traffic can be reduced. In addition, in the conventional configuration of the location registration area, location registration traffic increases at the area boundary. However, according to the present embodiment, once location registration is performed, a nearby wireless zone is included in the location registration area. Therefore, location registration traffic at the area border can be reduced.

In the control station 26, which receives a location registration request from the mobile station 11 via the base station 21, the paging area update means 28 extracts the paging area table 27 of the mobile station 11 concerned, and therefrom. The base station identifier to be the target of the new location registration request and the base station identifiers around it are added, and the accumulation of the number of passages is updated from the information on the number of passages added to the position registration request message. Sorted in descending order, grouped by the specified number from the top of the table, and prioritized paging. When an incoming call arrived at the mobile station 11 from the fixed network, paging was performed in order of the grouped priority. Since the means 29 sequentially performs the paging, the paging range can be limited and the paging traffic can be reduced.

(Embodiment 2) Next, a second embodiment of the present invention will be described. The device configuration in the present embodiment is the same as that of the first embodiment shown in FIG.
Since only a part of the operation is different, only the different operation will be described below.

This embodiment is different from the first embodiment in that a passing time is added to the location registration area table 12 in the mobile device 11. FIG. 5 shows the location registration area table 51 to which the passing times have been added as described above. As the passing time, the time when the base station identifier is registered in the location registration area table 12 is set as an initial value, and thereafter, the mobile station 11 moves within the same location registration area to determine whether location registration is necessary. Means 14 determines that there is no need for position registration, and
3 is updated to the passing time at the time when the number of passes of the position registration area table 12 is counted up. The mobile device 11 moves to an adjacent area and determines whether or not the location registration is necessary.
4 determines that location registration is necessary, the location registration request transmitting means 15 refers to the location registration area table 12 and adds the number of times and the time of passage of the mobile device 11 at that time to the location registration request message. And transmission means 2
0 to the base station 21.

In the control station 26 which has received the location registration request message through the base station 21, the paging area update means 28 extracts the paging area table 61 as shown in FIG. The paging area table 61 has the same base station ID, the number of times of passage, and the time of passage as the position registration area table 51 of the mobile device 11, and the base station IDs are arranged in descending order of the number of times of passage. As the passing time, the time when the base station ID is registered in the paging area table 61 is set as an initial value, and thereafter, is updated by the learning information 62 added to the location registration request message from the mobile device 11. Is done.

When the paging area update means 28 takes out the paging table 61 from the paging area table 27, the paging table 61 first accumulates the number of passing times and the passing time up to that time based on the learning information 62 added to the location registration request message. , And the sum of the number of base station identifiers registered so far and the number of newly added base station identifiers exceeds the threshold value preset in the paging table 27. To determine if
Exceeding the base station identifier added at that time, the data is deleted in ascending order of the number of passes, and in the case of the same cumulative number of passes, excluding the base station identifier added at that time, in order from the oldest passing time.
The portion indicated by the dotted line in the table 61 is the identifier of the base station to be deleted. In addition, a newly added base station identifier 1024,
1025, 1026, 1035, 1036, 1045,
In 1046, the registration time at that time (11:51) is set as an initial value.

The paging area update means 28 is provided at the base station I
When the addition, deletion, and update of D are completed, as shown in FIG. 8, the base station IDs are sorted in descending order of the number of passage times, and if the same number of passage times are the same, the one whose registration or update time is newer is ranked higher. Rearranged, grouped by the specified number from the top, in this case, by four, such as 63a to 63e, and updated to the table 64 in which priorities for simultaneous calling are assigned. When the update of the paging area table 27 is completed, the paging area updating means 28 transmits a location registration completion message to the mobile device 11 through the base station 21.

Upon receiving the location registration completion message, the mobile station 11 updates the location registration area table updating means 1.
6 and the number-of-passes resetting means 17 are notified. As shown in FIG. 5, the location registration area table updating means 16 first stores in the location registration area table 12 the total of the number of base station identifiers registered so far and the number of newly added base station identifiers. Judge whether the threshold value is exceeded or not, and if it is, excluding the base station identifier added at that time, the one with the smallest cumulative number of passages, and if the same cumulative number of passages, the passage time Delete the oldest one first. The dotted line portion of the table 51 is the identifier to be deleted, and 52 is the table after the deletion in this manner. Thereafter, the location registration area table updating means 16 newly adds the base station identifiers 1046, 1045, 1036, 1035, 102 based on the identifier information from the base station 21, as in the location registration area table 53 of FIG.
6, 1025, and 1024 are added to update the passage count accumulation, and the passage count reset unit 17 clears the passage count and resets the counter of the passage count unit 13.

As described above, according to the present embodiment, the location registration area table 12 of the mobile station 11 and the control station 26
By setting a threshold for the number of registrations in the paging area table 27 and keeping them at an appropriate size, it is possible to reduce traffic during location registration and paging.

[0029]

According to the present invention, as is apparent from the above embodiment, the base station broadcasts its own identifier and the surrounding base station identifiers within its own wireless zone, and the mobile station obtains the broadcast information from the broadcast information. If the base station identifier is not in its own location registration area table, the base station adds, to the location registration request message, information on the number of times of wireless zone passage indicating to which wireless zone the mobile station is located. By transmitting the location information, it is possible to have a location registration area corresponding to the movement characteristics of the mobile device, and it is possible to reduce location registration traffic.

Further, the control station arranges the paging area table for each mobile station from the number of times of passage included in the location registration request message in the order of the base station identifier in which the mobile station has been located, and arranges this table. By prioritizing the general paging by grouping by the specified number from the upper rank and performing the general paging sequentially in that order, the general paging traffic can be reduced.

Further, by setting a threshold value for the number of registrations in the location registration area table of the mobile station and the paging area table of the control station, and keeping them at appropriate sizes,
Traffic at the time of location registration and paging can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a mobile communication device according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing a change in a location registration area before and after updating of a mobile device in the device.

FIG. 3 is a list showing a change in a position registration area table before and after updating of a mobile device in the device.

FIG. 4 is a list showing changes in a paging area table before and after a control station is updated in the device.

FIG. 5 is a diagram showing an example of deleting a location registration area table of a mobile device according to the second embodiment of the present invention.

FIG. 6 is a list diagram showing a state after a position registration area table of a mobile device is deleted according to the second embodiment of the present invention;

FIG. 7 is a list showing an example of deleting a paging area table of a mobile device according to the second embodiment of the present invention.

FIG. 8 is a diagram showing a state after deleting a paging area table of a mobile device according to the second embodiment of the present invention;

FIG. 9 is a system configuration diagram of a mobile communication system for explaining a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Mobile device 12 Location registration area table 13 Passage count means 14 Location registration necessity determination means 15 Location registration request transmission means 16 Location registration area table update means 17 Passage number reset means 18 Call response means 19 Receiving means 20 Transmission means 21 Base Station 22 identifier information 23 identifier information notifying means 24 transmitting means 25 receiving means 26 control station 27 paging area table 28 paging area updating means 29 sequential paging means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04B 7/26 H04Q ⁷ /04-7/38

Claims (4)

(57) [Claims] 1. A mobile station, comprising: a plurality of base stations wirelessly connected to a mobile station; and a control station connected to the plurality of base stations by a wire. Holding the station identifier as information, and having identifier information notifying means for notifying those identifiers in its own radio zone, and the mobile station searches the location registration area table from the base station identifier of the received notification information to determine the position. Position registration necessity determining means for judging the necessity of registration, and position registration request transmitting means for adding the number of times of passing through the wireless zone in the position registration area to the position registration request message and transmitting the information when the position registration is required. ,
Passage count means for counting the number of times the mobile device passes through the wireless zone when position registration is unnecessary, and adding a base station identifier notified by the notification information to the position registration area table upon receiving the position registration completion. A mobile communication device comprising: a position registration area table updating unit for updating the cumulative number of passages; and a passage number reset unit for initializing the passage number and passage number counting unit of the position registration area table. 2. A control station, which receives a location registration request from a mobile station via a base station, stores, in a paging area table of the corresponding mobile station, a base station identifier to be subjected to a new location registration request and its surroundings. The base station identifier is added and the cumulative number of passes is updated from the pass count information added to the location registration request message, sorted in descending order of the pass count, and grouped by the specified number from the top of the table to be simultaneously 2. A general paging area updating means for prioritizing calls, and a sequential paging means for sequentially performing paging in the order of the grouped priorities when a mobile station receives a call from a fixed network. Mobile communication device. 3. When a mobile station and a control station update a location registration area table and a paging area table, respectively, a threshold value is set for the number of base station identifiers that can be registered in each table, and the threshold value is exceeded. 3. The mobile communication device according to claim 2, wherein, for the mobile stations, the mobile stations are deleted in ascending order of the number of passes, excluding the base station identifier added at that time. 4. The passing number counting means of the mobile device registers the passing time at the time of counting the number of passing times in a position registration area table, and the position registration request transmitting means outputs the passing number when the position registration is required. The information and the passing time information at that time are added to the location registration request message and transmitted. When the location registration area table updating means of the mobile station and the paging area updating means of the control station update each table, each table is updated. A threshold value is set for the number of base station identifiers that can be registered in the system, and for those exceeding the threshold value, except for the base station identifier added at that time, the order of accumulation of the number of passages is the same, and the accumulation of the number of passages is the same. 3. The method according to claim 2, wherein the deletion is performed in the order of older passage time.
A mobile communication device as described.