EP1121624A1 - Procede de gestion de l'heure dans un telephone mobile - Google Patents
Procede de gestion de l'heure dans un telephone mobileInfo
- Publication number
- EP1121624A1 EP1121624A1 EP99970476A EP99970476A EP1121624A1 EP 1121624 A1 EP1121624 A1 EP 1121624A1 EP 99970476 A EP99970476 A EP 99970476A EP 99970476 A EP99970476 A EP 99970476A EP 1121624 A1 EP1121624 A1 EP 1121624A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- time
- mobile telephone
- country
- displayed
- code
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G21/00—Input or output devices integrated in time-pieces
- G04G21/04—Input or output devices integrated in time-pieces using radio waves
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G9/00—Visual time or date indication means
- G04G9/0076—Visual time or date indication means in which the time in another time-zone or in another city can be displayed at will
-
- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/14—Setting the time according to the time information carried or implied by the radio signal the radio signal being a telecommunication standard signal, e.g. GSM, UMTS or 3G
- G04R20/18—Decoding time data; Circuits therefor
Definitions
- the present invention relates to a method for managing the time in a mobile telephone. It finds more particularly its use in mobile telephones operating according to the GSM standard.
- One of the aims of the invention is to provide a user with a time which automatically takes account of the time situation in which this user finds himself.
- This provision essentially comprises a display of a current time.
- it can also be used to reschedule appointments recorded in an electronic diary proposed as a functional accessory of a mobile phone, especially when the user experiences time differences.
- An object of the invention is therefore to set a time used, or displayed on a screen of a mobile phone, according to a geographical area in which a mobile phone is located.
- a method of time management is currently known in the field of mobile telephones. We know how to set a time displayed on a screen of a mobile phone. This setting is done manually by a user. In the field of microcomputers, it is also known to take into account a possible change of summer-winter time, depending on a country for which a microcomputer is dedicated. In order to allow the management of this time change, such a microcomputer has calendar information relating to a current season.
- the time management methods currently used present some problems. Indeed, a first problem appears when a user, equipped with a mobile phone, goes abroad. More specifically, the problem arises if the user travels a distance large enough to pass him from a region covered by a time zone to a region covered by another time zone. Thus, if the user wants his mobile phone to display the correct time on the mobile phone screen, he must manually make the necessary changes. For this purpose, he must know the time difference that applies in the geographic area in which he is located. It is tedious and it requires knowledge that is sometimes difficult to possess. A user can travel great distances. These large distances can be large enough for the user to cross multiple regions, each of which is covered by a different time zone. In this case the user must repeat this operation at each step. Then, back in his country of origin, the user must still make an adjustment in order to display a correct time on the mobile phone.
- a user in a country other than their own may experience another problem. Indeed, if he is from a country that takes into account a summer-winter time change, then it is possible that his mobile phone has been programmed to take this change into account. If the country where the user is located is not affected by such a summer / winter time change then a problem arises. Indeed, for the time management of his mobile phone, everything would happen as if the mobile phone was in a country for which it was programmed. On a date scheduled for a summer-winter time change, the time displayed on a mobile phone screen would be modified. Therefore, the time displayed by the mobile phone would be wrong. It would still have to be changed manually.
- the object of the invention is to remedy the problems mentioned by proposing an automatic time management method, in particular the time displayed on a screen of the mobile telephone.
- the adjustment is made as a function of a measurement of a time zone in which the mobile telephone is located. In fact, it is not a geographical zone in which the mobile telephone is located which is taken into account, but a geographical zone in which is a base station, in relation to this mobile telephone.
- This base station manages a cell in which a mobile phone is located. It is assumed in the invention that the base station, with which the mobile telephone is connected, is in a region covered by the same time zone as that which covers the region in which this mobile telephone is located. The measurement of the time zone is then made using identification information sent by this base station to the mobile telephone.
- a mobile telephone receives information, sent by base stations, concerning the operator of the mobile telephone network, the country and the identity of the base station in connection with the mobile telephone.
- This information is normally used to display on a screen of the mobile telephone a name of an operator of a telephone network to which the mobile telephone is connected.
- the mobile phone has a table in its memory which includes country names with operator names, as well as country codes and operator codes.
- a country code corresponds to a country name in the table.
- An operator code corresponds to an operator name in the table. So when you receive a country code and an operator code, you look in the table for the name of the country and the corresponding operator and it can be displayed.
- the adjustment of the displayed time, or of the useful time is then done automatically.
- the identification information transmitted by a base station of a network managed by an operator and located in a country is used. These credentials are transmitted to the mobile phone each time that mobile phone connects to a network. The mobile phone can even receive, according to the state of the art, these identifying information when it is in a standby state.
- a standby state is a state in which a mobile telephone is in after a user has entered his personal code (called PIN code for personal identification number) and before he enters into communication with another party. This personal code is used to unlock access to the various functions available in the mobile phone.
- an active state is a state in which a mobile telephone is in when its user is in communication.
- the mobile telephone thus receives, periodically, according to the state of the art, these identification information when the mobile telephone is connected to a network and is in a standby state. It can also receive it when it is in communication.
- This identification information can be transmitted using, as transmission medium, a signal at a so-called beacon frequency, identical for a set of base stations.
- the frequency channel linked to this beacon frequency is called BCCH channel, for Broadcast Control CHannel. It is in this channel that identification information is preferably broadcast.
- identification information allow in the invention to geographically locate a cell, therefore a base station.
- a user moving from a region covered by a time zone to a region covered by another time zone, will see the time displayed on a screen of his mobile phone change automatically as soon as a cell change takes place . This change will occur when this user moves from a cell located in a region covered by a first time zone to a network cell located in a region covered by a second time zone.
- the mobile phone When connecting to a new base station, the mobile phone will receive new identification information. These new identification information allow, after interpretation of the latter in the mobile telephone, to know the geographical position and therefore the time zone of the new base station connected to the mobile telephone. There is thus access to a time difference value which must be added to an internal clock of the mobile telephone so that the time displayed or used is a correct time.
- the correspondence table of the mobile telephone comprises two other types of information. These two other types are used in the case of countries subject to several time zones. A first of these two pieces of information is used in a test, in order to know if a country has several time zones. If this is the case, then a second piece of information is used which is geographic location information. It will be contained, according to the invention, in type LAC-CI type identification information.
- the LAC-CI information means Location Area Code-Cell Identity whose translation is Location Area Code - Cell Identity. In practice, LAC-CI information is transmitted in more complete messages.
- CGI CGI
- a field for the code of a country a field for the code of an operator and a field for the identification LAC-CI of a base station.
- this reference time is a time which is not affected by any time difference.
- the invention therefore relates to a time management method in a mobile telephone comprising the following steps:
- this binary message is used or displayed on a screen, in an understandable form, to make it useful or visible to a user, characterized in that:
- FIG. 1 a representation of the means of implementing the time management method displayed according to the invention. These means are contained in a mobile phone itself not shown;
- FIG. 2 a schematic representation of a distribution of mobile operators in two countries, one of which is covered by three time zones and the other by a single time zone;
- FIG. 3 an illustration of a sequence, in the form of an algorithm, of the different stages of the method according to the invention.
- FIG. 1 shows different means used by the method of the invention.
- a program 1 contained in a program memory 2 conditions the operation of a microprocessor 3.
- a dynamic memory 4 stores data 5, 6 and 7. These data 5, 6 and 7 represent, according to the invention, respectively a country code , an operator code and a LAC-CI code. These data 5, 6, 7 are sent by a mobile telephone network 100.
- This network 100 uses a base station 8 to communicate with the mobile phone.
- the network 100 further includes a base station controller 101, called BSC which stands for Base Station Controller, which is responsible for managing a group of base stations. based.
- This base station controller 101 is linked to other base stations by a switching center 102, called MSC which stands for Mobile-services Switching Center.
- This switching center 102 is connected, for example by a bus 103 controlled by a microprocessor located in the switching center 102, to a memory 104.
- This memory 104 is organized in the form of a correspondence table for storing a base of data.
- the database is called VLR for Visitor Location Register.
- This database is a temporary user identification body.
- An update of the database consists in placing in memory 104 several identifying information concerning the user. This identification information is stored, respecting the organization in the form of a correspondence table, in the memory 104.
- the correspondence table comprises a certain number of lines or of records 105.
- a record 105 has several fields. It includes in particular a field 106 which contains data relating to a telephone number of a user. It also includes a field 107 containing a LAC-CI code. There is thus, for each record, a correspondence between a telephone number and an LAC-CI code.
- the LAC-CI code is the identity of a base station in the area in which the mobile telephone is located, which can be reached with this telephone number.
- the identification information corresponding to the data 5, 6, 7 is transmitted by the base station 8 by removal from this memory 104.
- the correspondence memory 12 is organized, in an example preferred, as follows.
- a part of the memory 12 comprises a series of tables 13, and 13.1 to 13. n.
- Each table 13 or 13.1 to 13. n is associated with a country.
- Each table 13 has a certain number of rows or records 14. This number of records 14 may be different from one table 13 to another.
- all the records 14 of all the tables 13 have the same length.
- a record 14 has several fields.
- a record 14 has eight fields.
- a field 15 contains a code relating to a country.
- a field 16 contains a code relating to an operator.
- a field 17 contains an LAC-CI code relating to an identification and therefore to a geographical location of a base station.
- Field 18 contains the name of an operator.
- Field 19 contains the name of a country.
- Field 20 contains information allowing to know whether or not the country defined by field 19 of the same line has several time zones. Binary information equal to zero means that there is only one time zone and binary information equal to one means that there are several time zones.
- a field 21 contains information making it possible to know whether the country identified in field 19 of the same line 14 is subject to the summer-winter time change. For example, binary information equal to zero indicates that there is no summer / winter time change in the identified country, and binary information equal to one indicates that there is a summer time change -winter in the identified country.
- a field 22 contains time difference information to be applied. This offset information is a function of the identification contained in fields 15 to 17 of the same record 14.
- the size of the memory 12 is dependent only on the maximum number of countries and not on the number of base stations in these different countries. This number of base stations increases according to the number of operators per country.
- a location 23 of the memory 12 is reserved in order to keep the present date.
- a different architecture of the memory 12 is possible.
- certain fields may not be present.
- at least one of the fields 15, 16 or 17 will be present with regard to at least one field 20 to 22 containing time difference information.
- the table 12 could include addresses of locations in memory of the records 14 where the information useful for knowing the time difference to be taken into account would be found.
- the operation of the method of the invention is as follows.
- the microprocessor 3 reads the data received 5 from the dynamic memory 4. It compares it to the content of the field 15 of the records 14 of the tables. Alternatively, it addresses the table in memory with the value of the datum 5.
- the microprocessor 3 finds a code in a field 15 equal to the datum received 5, then it extracts the name of the country in which the mobile telephone is located. To do this, it reads the content of field 19 of the line containing this code. From there, using the program 1, the microprocessor 3 tests whether information contained in field 20 of the line contains this code in order to know if, in the country considered, there are several time zones. If the answer to the test is negative, then, always on the same line, we read the content of field 22 which gives a number of hours that must be added to, or removed from, an absolute time contained in a register 24.
- the absolute time contained in register 24 is a reference time internal to the mobile phone. This internal reference time can only be changed manually by the user. This absolute time will be, in a preferred example, a time referenced with respect to the Greenwich meridian, it is a time called GMT. This is why the microprocessor 3, which has recovered an offset value contained in the field 22 via the bus 11, adds or removes this offset value from a field 22 at the absolute time contained in the register 24 and places the result of the operation in a register 25. The microprocessor 3 does not modify the absolute time contained in the register 24. Thus the time contained in the register 25 is an actual time. This real time is displayed on a screen 26 of the mobile telephone via the bus 11 under the control of the microprocessor 3.
- the modified time is not displayed but is used internally in the mobile telephone to synchronize the mobile phone, including its calendar functions with the time zone in which it is located.
- a test on information contained in the field 21 corresponding to a summer-winter time change indicates whether the actual time contained in register 25 should be further modified. This allows you to set either summer time during the summer season or summer time. winter during the winter season. The season is determined by interpretation of a date located in the memory location 23. This interpretation is managed by the microprocessor 3 controlled by the program 1. It consists in comparing the current date with dates of time change located at spring and fall. Consequently, the time displayed 27 on the screen 26 corresponds to a GMT time increased or decreased by the time difference contained in field 22 and possibly by a change due to summer-winter time.
- a user who wants to manually change the displayed time 27 will in fact change the absolute time found in the register 24. For example, if the user wants to manually add a time then the displayed time 27 will be broken down as follows. The time displayed will be the sum between an offset defined in a field 22 and the new absolute time contained in the register 24. This new time will for example be the GMT time plus one hour. Now whatever the country where the time difference contained in a field 22 is located will be added to this new absolute time.
- Figure 2 shows a geographic representation of two neighboring countries 29 and 30.
- Country 29 is covered by three time zones 31, 32, and 33 and has regional locations of three mobile operators 34, 35, and 36.
- the operator 34 covers in country 30 a geographical area extending within a single time zone 31.
- Operator 35 covers a geographical area extending over two time zones 32 and 33.
- Operator 36 covers a geographic area restricted to time zone 33.
- Country 30 has a single operator 37 and is located in time zone 32.
- This mobile telephone receives identification information written in its dynamic memory 4 in the form of data 5, 6, 7. With the data 5, we have access to the name of the country 30 in which we are find.
- a test on the information contained in field 20 of the line containing the name of the country 30 will indicate that this country is covered by a single time zone, in this case this information is equal to zero.
- the time difference to be applied to the absolute time is immediately deduced by reading the value contained in field 22 of line 14 corresponding to the name of country 30.
- the information contained in field 21 we will know if in this country 30 it is necessary to apply a summer-winter time change. If so, the information has a value of one.
- the actual time contained in the register 25 and the date contained in the memory location 23 are read. It is therefore possible to determine what is the correct time which must be displayed on the screen 26.
- the user goes to country 29, his mobile phone will connect, for example, to the operator's network 35.
- the network will send identification information which the mobile phone will place in dynamic memory 4 in the form of data 5 , 6, 7.
- data will allow him to determine the time difference in this country, or more generally in this region.
- the test of the information contained in field 20 of line 14 containing the name of country 29 indicates the presence of several time zones 32 and 33 in country 29.
- the information contained in field 20 is therefore equal to one.
- the country code equal to the data 5 will no longer be sufficient to determine the time difference. It is therefore necessary to use an additional datum, datum 7 which makes it possible to geographically locate a base station within the country 29.
- FIG. 3 shows a representation, in the form of an algorithm, of different steps of the method according to the invention.
- a first step 38 concerns a reading of the data 5, 6, 7 relating to identification information received by the mobile telephone and written in the dynamic memory 4. This information enables the microprocessor 3 controlled by the program 1, to search, during a step 39, the start of table 13 or 13.1 to 13.n containing a country code equivalent to data 5. The latter is compared with values contained in fields 15. Once table 13 associated with the identified country is found, a first test
- the 40 is set up to find out if the country is covered by several time zones.
- the information tested is information contained in a field 20 of the first row 14 of a table 13. This information is the same for all the rows of the same table.
- a positive 40 test one arrives in a step 41 during which one searches in the table found for line 14 whose content of the field 17 is equal to the data 7.
- this step 41 is bypassed.
- a new test step 43 the information contained in field 21, of line 14 is tested. In this way we know if the identified country is affected by a summer-winter time change.
- the current date is read in a step 44 at the memory location 23 and in the register 25 the actual time.
- the real time is adjusted accordingly. That is to say that the actual time is changed according to whether it is summer time or whether it is winter time.
- the name of the country identified is displayed as a function of the value read in field 19, of line 14.
- time difference information can be applied directly to the mobile phone, depending on where the mobile phone is located.
- a triggering of a sending of the time difference information is, in a preferred example, ordered by the network which is in charge of managing the roaming of a user. It could very well have been envisaged that this triggering would be ordered by the mobile telephone, for example when the latter receives a new LAC-CI code.
- a field 108 is added to each record 105 in the memory 104. This field 108 therefore contains a measurement of a time zone in which the mobile telephone is located.
- This time difference depends on the geographic location in which the base station is located.
- the switching center 102 connected to the memory 104, for example by a bus 103, supplies this time zone measurement to the base station 8, via the base station controller 101.
- the base station 8 sends this time zone measurement information, in addition to previous identification information, on the mobile phone.
- the data memory 4 of the mobile telephone comprises, in this case, additional data 109 relating to the time difference to be applied to the absolute time contained in the register 24.
- the result is placed in the register 25 containing the real time which corresponds, among other things, to the time displayed 27 on the screen 26 of the mobile telephone. This has the immediate consequence of reducing the size of the correspondence memory 12 in the mobile telephone.
- the correspondence memory 12 of the mobile telephone should contain all the operator codes of all the countries as well as the names of operators and of countries and LAC-CI codes. If, in addition, this measurement is modified taking into account a possible summer-winter time change, then the correspondence memory 12 of the mobile telephone which previously occupied a space is completely deleted in rather restrictive memory.
- SMS-CB a broadcasting frequency channel carrying messages which will be called SMS-CB.
- This frequency channel is named CBCH, for Cell Broadcast CHannel.
- the CBCH channel is the channel which makes it possible to broadcast information, in particular of meteorology or automobile traffic, in the form of SMS-CB messages, to several users.
- SMS-CB messages are messages intended for all mobile phones in the same geographic area. This geographical area includes either a cell controlled by a base station or several cells each controlled by a base station. All the base stations in this geographical area transmit identical SMS-CB messages in the same CBCH frequency channel.
- the management method in the network is further simplified since information is sent over a broadcasting channel, therefore accessible to all users located in the same geographical area, and no longer over a channel dedicated to a single user. .
- any user located in a geographical area receives, on the initiative of the network or the mobile phone, time zone measurement information. This sending is carried out either on a determined date or when the user passes from a geographical zone covered by a time zone to a geographical zone covered by another time zone.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9813046A FR2784760B1 (fr) | 1998-10-14 | 1998-10-14 | Procede de gestion de l'heure dans un telephone mobile |
FR9813046 | 1998-10-14 | ||
PCT/FR1999/002468 WO2000022484A1 (fr) | 1998-10-14 | 1999-10-12 | Procede de gestion de l'heure dans un telephone mobile |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1121624A1 true EP1121624A1 (fr) | 2001-08-08 |
EP1121624B1 EP1121624B1 (fr) | 2005-04-13 |
Family
ID=9531697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99970476A Expired - Lifetime EP1121624B1 (fr) | 1998-10-14 | 1999-10-12 | Procede de gestion de l'heure dans un telephone mobile |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1121624B1 (fr) |
AU (1) | AU5991499A (fr) |
DE (1) | DE69924745T2 (fr) |
FR (1) | FR2784760B1 (fr) |
WO (1) | WO2000022484A1 (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001337182A (ja) * | 2000-05-26 | 2001-12-07 | Matsushita Electric Ind Co Ltd | 携帯端末装置 |
DE10040035B4 (de) * | 2000-08-11 | 2005-10-06 | T-Mobile Deutschland Gmbh | Verfahren zur Synchronisation der internen Uhr eines Mobilfunkendgeräts mit der lokalen Zeit |
US7512107B2 (en) * | 2003-12-17 | 2009-03-31 | Samsung Electronics Co., Ltd | Asynchronous mobile communication terminal capable of setting time according to present location information, and asynchronous mobile communication system and method for setting time using the same |
JP2006038833A (ja) * | 2004-06-25 | 2006-02-09 | Ricoh Co Ltd | 時刻補正装置及び時刻補正装置を備える画像形成装置 |
KR100651458B1 (ko) * | 2004-11-09 | 2006-11-29 | 삼성전자주식회사 | 비동기식 이동통신 시스템에서 시간정보 제공 방법 |
KR100703490B1 (ko) | 2005-04-18 | 2007-04-03 | 삼성전자주식회사 | 비동기 방식을 기반으로 한 이동 통신 단말기의 시간동기화 방법 및 그 시스템 |
KR100651522B1 (ko) | 2005-12-14 | 2006-11-30 | 삼성전자주식회사 | 이동통신 단말기에서 시간 정보를 동기화시키기 위한 방법및 장치 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990013983A1 (fr) * | 1989-04-28 | 1990-11-15 | Motorola, Inc. | Reglage automatique de fuseaux horaires dans un recepteur portatif |
JP3005266B2 (ja) * | 1990-09-07 | 2000-01-31 | 日本電気株式会社 | 自動車電話装置 |
DE69329628T2 (de) * | 1992-03-26 | 2001-03-01 | Nec Corp | Automatische Zeitzonenanpassung in einem Mobilfunktelefon |
US5455807A (en) * | 1993-08-18 | 1995-10-03 | Seiko Corp. | Time maintenance and display in a time keeping system including a time zone boundary |
AU1854997A (en) * | 1995-09-08 | 1997-04-09 | Mardhekar, Dhananjay Vishnu | International time indicating system |
-
1998
- 1998-10-14 FR FR9813046A patent/FR2784760B1/fr not_active Expired - Fee Related
-
1999
- 1999-10-12 EP EP99970476A patent/EP1121624B1/fr not_active Expired - Lifetime
- 1999-10-12 AU AU59914/99A patent/AU5991499A/en not_active Abandoned
- 1999-10-12 WO PCT/FR1999/002468 patent/WO2000022484A1/fr active IP Right Grant
- 1999-10-12 DE DE69924745T patent/DE69924745T2/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0022484A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2784760B1 (fr) | 2001-01-12 |
FR2784760A1 (fr) | 2000-04-21 |
WO2000022484A1 (fr) | 2000-04-20 |
AU5991499A (en) | 2000-05-01 |
DE69924745T2 (de) | 2006-02-02 |
EP1121624B1 (fr) | 2005-04-13 |
DE69924745D1 (de) | 2005-05-19 |
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