EP2370915A1 - Infotainmentsystem und computerprogrammprodukt - Google Patents
Infotainmentsystem und computerprogrammproduktInfo
- Publication number
- EP2370915A1 EP2370915A1 EP09764209A EP09764209A EP2370915A1 EP 2370915 A1 EP2370915 A1 EP 2370915A1 EP 09764209 A EP09764209 A EP 09764209A EP 09764209 A EP09764209 A EP 09764209A EP 2370915 A1 EP2370915 A1 EP 2370915A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sub
- identifier
- properties
- property
- infotainment
- 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.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/22—Indexing; Data structures therefor; Storage structures
- G06F16/2228—Indexing structures
- G06F16/2237—Vectors, bitmaps or matrices
Definitions
- the invention relates to an infotainment system and a computer program product for operating the infotainment system.
- Infotainment systems are installed, for example, in modern motor vehicles and combine the transmission of information, such.
- the storage and management of this so-called infotainment data is preferably carried out by means of a database system.
- a modern database system regularly includes a database and a database management system.
- the data is stored in the database.
- the database management system is provided for managing the data in the database.
- the management of the database may include, for example, searching, reading and / or writing data in the database.
- outdated data may be updated by an update command that includes a combination of search, read, and / or write commands.
- the object of the invention is to provide an infotainment system and a computer program product for operating the infotainment system, which enables efficient storage of infotainment data.
- the invention is characterized, in a first aspect, by an infotainment system comprising a relational database stored on a storage medium and a data storage system. bank management system.
- the database management system is configured to access infotainment data stored in the relational database as data records.
- a data record has a respective identification value of a unique identifier, property values of several properties and at least one sub-identifier value of at least one subrecognition. All or at least one of the plurality of properties and one of the at least one sub-identifier are associated with at least one sub-table.
- the unique identifier, the remaining of the multiple properties, and the at least one associated sub-identifier are associated with at least one main table.
- Tuples of the property values of the properties assigned to the respective sub-table are only stored once in the respective subtable.
- the multiple properties are functionally independent. This contributes to the fact that tuples of the property values of the properties of the respective sub-table are stored only once in each sub-table. That is, a respective combination of property values associated with each tuple is stored only once in each sub-table. This helps to reduce redundancy of property values in the respective sub-table.
- a table normalized according to the third normal form there is no functional dependency between the properties assigned to the table, ie it is not possible to unambiguously conclude a property value of a property for a property value of another property. The unique identifier and subrecognition are not considered as a property. Tables that are already normalized to the third normal form of database theory may have redundancies of tuples of property values.
- the at least one main table preferably has at least one unique identifier and at least one sub-identifier.
- the at least one subtable has at least one of the at least one subkey on.
- the at least one main table and the at least one subtable each have columns and rows. Each column is assigned to a property or the unique identifier or the at least one subrecognition.
- Main table and an associated row of at least one subtable form a record.
- the respective sub-recognition value of the at least one sub-identifier represents in each case a reference of the respective line of the at least one main table to the assigned respective line of the respective sub-table.
- a tuple denotes a combination of property values that are assigned to a row of the respective subtable. Tuples of the property values may include one or more property values associated with a row of the respective subtable.
- a combination of property values, each associated with a row occurs only once in the at least one subtable.
- the data records can be stored on the storage medium of the relational database in a particularly efficient manner and with a small storage space requirement.
- a redundancy of property values associated with a property may still exist.
- the number of sub-tables is as small as possible in order to minimize the additional memory requirement, which is present due to the at least one sub-identifier.
- the relational database and the database management system can be integrated, for example, as a functional unit in the infotainment system of a motor vehicle, the infotainment system in the motor vehicle preferably being referred to as an embedded system is formed. In principle, however, it is also possible that the relational database and the database management system are designed as separate functional units in the infotainment system.
- the database management system is designed to access the at least one sub-table and to reconstruct at least one of the data records depending on the at least one sub-identifier and the property values stored in the at least one sub-table.
- the database management system is designed to first access the respective sub-table when specifying a property value of one of the properties associated with the at least one sub-table.
- the database management system is designed to compare the predetermined property value with the stored property values of the respective properties and, depending on the comparison, to determine at least one sub-identifier value of at least one assigned sub-identifier. Depending on this, at least one of the data records is determined.
- an instruction calculation unit of the database management system is preferably designed to interpret the predefined statement in such a way that the at least one sub-table is first accessed to determine the at least one sub-identifier value of the at least one sub-identifier.
- the at least one sub-identification value is determined by means of the comparison of the predetermined property value with the stored property values of the respective properties if the sub-table has a few lines.
- the infotainment system has at least one index structure that includes references to storage locations of the property values of the respective property that is assigned to the respective sub-table.
- the database administration system is designed to first access the respective index structure and to compare the predetermined property value with the property values of the respective properties stored in the index structure.
- the database management system is also designed to determine at least one sub-identifier value of at least one assigned sub-identifier, depending on the comparison. Depending on this, at least one of the data records is determined.
- the index structure allows particularly fast access to the respective property values of the sub-table on the storage medium, in particular if the subtable has particularly many lines.
- the predetermined instruction is designed as an SQL statement. This allows a particularly fast read and / or write access to the infotainment data in the relational database.
- the invention is characterized in terms of a second aspect by a computer program product.
- the computer program Product includes a computer readable medium with program instructions.
- the program instructions are executable by a computer.
- the program instructions are designed to operate the infotainment system according to the first aspect of the invention.
- FIG. 1 shows a database system
- FIG. 2 an original table
- FIG. 3 shows a main table and a sub-table
- FIG. 4 shows a further main and further sub-tables.
- An infotainment system (FIG. 1) comprises an infotainment unit INFO, a database management system RDBMS and a relational database RDB.
- the infotainment system can for example comprise a navigation unit and thus serves to find a predefined route and / or to calculate a predefined route and / or to find a predefined location and / or to determine further information.
- the infotainment system may additionally or alternatively also include a music system and be designed to find and play predetermined music pieces, for example.
- the infotainment unit INFO, the relational database RDB and the database management system RDBMS can also be embodied as software function units in the infotainment system.
- the infotainment system for example, a
- the infotainment system preferably has at least one input unit which serves to input information, for example a route and / or a piece of music, which are to be determined, and / or information on the basis of which infotainment data are changed, in particular updated.
- the infotainment unit INFO, the relational database RDB and the database management system RDBMS can be integrated as a functional unit in the infotainment system or as distributed functional units.
- the infotainment unit INFO communicates with the database management system RDBMS.
- the database management system RDBMS comprises an instruction interface SQL_IF, a statement processing unit SQL_CMD_PRO, a pager PAGER, a directory ID_LIB of index structures, and an operating system interface OS_IF.
- the database management system RDBMS communicates with the relational database RDB.
- the infotainment data e.g. Navigation data and / or music data stored.
- the infotainment unit INFO preferably communicates with the database management system RDBMS in such a way that the infotainment unit INFO sends an instruction SQL_CMD to the database management system RDBMS.
- the statement SQL_CMD can also be represented by suitable signals, which are then translated in the database management system RDBMS into the corresponding statement SQL_CMD.
- the statement SQL CMD is designed as an SQL statement.
- the SQL IF statement interface is used to verify that the SQL_CMD statement is syntactically correct. If the SQL CMD statement is syntactically correct, it will be parsed by the
- Statement interface SQL_IF passed to the statement calculation unit SQL CMD PRO.
- the instruction calculation unit SQL CMD PRO preferably determines a software execution plan depending on the statement SQL_CMD and preferably on the basis of at least one available index structure, which is stored in the index structure directory ID_LIB.
- the software execution plan is a section of the program that serves to make access to the infotainment data as efficient as possible.
- the software execution plan is passed from the statement calculation unit SQL_CMD_PRO to the pager PAGER.
- the pager PAGER serves to determine a hardware execution plan, depending on the software execution plan.
- the hardware execution plan is representative of how a hardware, such as a CD-ROM drive and / or a hard disk and / or other data carriers, which may include the relational database RDB, must be driven to execute the software execution plan.
- the hardware execution plan is transferred to the operating system interface OS_IF, which translates the hardware execution plan into corresponding setting signals for the technical device on which the infotainment data are stored, and / or which comprises the storage medium on which the infotainment data are stored.
- the infotainment data are stored in the relational database RDB as data records in tables.
- FIG. 2 shows an original table R which has ten data sets.
- Each data record is represented by an identification value of a unique identifier PK and additionally comprises five property values a-e of different properties A-E.
- the properties AE of the respective data records are indicated in capital letters, while property values ae of the properties AE are indicated in lower case letters.
- Egg- Each property is assigned a column.
- a row of the at least one main table and an associated row of the at least one subtable constitute a data record.
- the properties A-E of the original table R are functionally independent of each other and are normalized according to the third normal form.
- FIG. 2 indicates that the same property values a-e are stored in the different data sets for the plurality of properties A-E.
- the property value el of the property E of the first data set is identical to the property value el of the property E of the second through the fourth data set.
- further redundancies of property values in the original table R are indicated in FIG. 2, wherein not all redundancies are identified.
- a data record of the original table R is divided into a main data record in a main table MR and to a sub-data record in a first sub-table PR1.
- the main table MR includes the unique identifier PK and the properties A and C, as well as a first subcode PID1.
- the first sub-table PR1 comprises the first sub-identifier PID1 and the properties B, D, E associated with this identifier of the original table R, wherein a respective tuple of the property values b, d, e, which are each associated with one row of the first sub-table PR1, only in each case once stored in the first sub-table PRl.
- the tuple of the property values b5, d5, e5 of the properties B, D, E is stored only once in the first sub-table PR1
- this tuple of the property values b5, d5, e5 is stored five times, although the original table R is normalized according to the third normal form.
- a redundancy of property values of one property is still present in the first th sub-table PRl available, such.
- the property value el is stored three times in the first sub-table PR1.
- the respective sub-table can have such a small memory requirement that, for example, the respective sub-table can be temporarily stored in a cache memory of the database management system RDBMS or the relational database RDB and thus can be accessed particularly quickly. This allows a particularly efficient access to the property values of the respective sub-table.
- the respective sub-identifier value of the first sub-identifier PID1 represents the respective sub-data record in the first sub-table PR1 and makes it possible to refer the respective sub-data record from the main data record associated therewith in the main table MR.
- SQL CMD SQL CMD
- the database management system RDBMS in particular the instruction calculation unit SQL_CMD_PRO of the database management system RDBMS, is preferably configured first to the first sub-table PR1 access.
- the predetermined property value is compared with the eigenvalue stored in the first sub-table PR1.
- values b, d, e and dependent thereon determines one or more associated sub-identification values of the first sub-identifiers PID1.
- the at least one determined sub-recognition value of the first sub-identifier PID1 is representative of at least one data record which has the predetermined property value of the property B, D, E.
- the main data records in the main table MR can then be accessed particularly efficiently.
- the index structure for the first subtable PR1 may be created in the ID_LIB directory of index structures.
- the index structure then preferably references the storage locations of the sub-identification values of the first sub-IDs PID1 of the first sub-table PR1. If, for example, all the property values a of the property A are searched for, to which the predetermined property value bl of the property B is assigned, then, for example, by means of the statement SQL_CMD
- a data record of the original table R is divided into the main data record of the main table MR and to the sub-data record of the first sub-table PR1 and to another sub-data record of a second sub-table PR2.
- the main table MR additionally comprises a second sub-identifier PID2 in addition to the first sub-identifier PID1.
- the property values b of the property B of the first sub-table PR1 can be referenced by means of the respective sub-recognition value of the first sub-identifier PID1.
- the property values d, e of the properties D, E of the second sub-table PR2 can be referenced by means of the respective sub-identifier value of the second sub-identifier PID2.
- the first algorithm explains the determination of a subtable as used in Figs. 3a and 3b.
- n 'of property values of the given combination of the properties Al, A3, A5 in the original table RX lie.
- r represents the memory requirement of the respective subrecognition, e.g. 8 bytes.
- the first term o * s * (n-n ') represents the amount of bytes saved for the particular combination of properties being considered.
- the second term r * (n + n ') then represents the additionally required memory requirement, which is required due to the additional sub-IDs and which is to be deducted from the memory space saved.
- the calculation shown is calculated for each of the 2 ° possible combinations of properties.
- the combination of properties with the highest memory space savings is then preferably assigned to the subtable.
- this sub-table then also has an optimum number of rows and columns.
- the second algorithm explains the detection of several sub-tables as used in FIG.
- the following algorithm does not determine the combinations of properties with the least amount of memory, but rather combinations of properties that allow a reasonable reduction in memory requirements.
- the saved memory space can be calculated in bytes of each property, where s, n, n ', and r have the same meaning as in the first algorithm.
- an attempt is made to merge two property pairs to form a property triplet. If, for example, the two property pairs Ai, Aj and Ak, Aj are present, then it can be checked whether the property triplet Ai, Aj, Ak saves more storage space than the associated property pairs Ai, Aj and Ak, Aj.
- two property striplets are combined into a property tuple of length 4 and evaluated. If, for example, the two property strips Ai, Aj, Ak and Ai, Aj, Al are present, then it can be checked whether the property tuple of length 4 Ai, Aj, Ak, Al saves more memory space than the associated property strips Ai, Aj, Ak and Ai, Aj, Al.
- the further merger can be operated to property stubs of predetermined length until a further saving of storage space can no longer be determined.
- the first way of combining properties on the list, while preserving the highest memory space can be assigned directly to a first subtable.
- the second possibility following the first possibility of the combination of properties on the list is determined, which has not been canceled.
- the second possibility of the combination is assigned to a second subtable and again all list entries are deleted, which have at least one property, which is also contained in the second possibility of the combination of properties.
- the second algorithm can be used to determine several sub-tables with different numbers of different properties, which enable a particularly efficient storage of property values in the relational database RDB.
- the property 'speed_limit' (speed limitation), according to experience, allows only relatively few property values, for example 50, 60, 70, 80, 100, 120 km / h, or the property 'urban' preferably as eigenvalue. values only yes or no, or the property 'functional_road_class', for example motorway, main road, etc., allows as possible property values, these properties are particularly suitable for being assigned to one or more sub-tables. This allows a particularly efficient storage of these property values in the relational database RDB.
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Software Systems (AREA)
- Data Mining & Analysis (AREA)
- Databases & Information Systems (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008059096 | 2008-11-26 | ||
| PCT/EP2009/064620 WO2010060764A1 (de) | 2008-11-26 | 2009-11-04 | Infotainmentsystem und computerprogrammprodukt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2370915A1 true EP2370915A1 (de) | 2011-10-05 |
Family
ID=41571577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09764209A Ceased EP2370915A1 (de) | 2008-11-26 | 2009-11-04 | Infotainmentsystem und computerprogrammprodukt |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2370915A1 (de) |
| WO (1) | WO2010060764A1 (de) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050131585A1 (en) * | 2003-12-12 | 2005-06-16 | Microsoft Corporation | Remote vehicle system management |
| US20060036356A1 (en) * | 2004-08-12 | 2006-02-16 | Vladimir Rasin | System and method of vehicle policy control |
| US20080156173A1 (en) * | 2006-12-29 | 2008-07-03 | Harman International Industries, Inc. | Vehicle infotainment system with personalized content |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6016497A (en) * | 1997-12-24 | 2000-01-18 | Microsoft Corporation | Methods and system for storing and accessing embedded information in object-relational databases |
-
2009
- 2009-11-04 WO PCT/EP2009/064620 patent/WO2010060764A1/de not_active Ceased
- 2009-11-04 EP EP09764209A patent/EP2370915A1/de not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050131585A1 (en) * | 2003-12-12 | 2005-06-16 | Microsoft Corporation | Remote vehicle system management |
| US20060036356A1 (en) * | 2004-08-12 | 2006-02-16 | Vladimir Rasin | System and method of vehicle policy control |
| US20080156173A1 (en) * | 2006-12-29 | 2008-07-03 | Harman International Industries, Inc. | Vehicle infotainment system with personalized content |
Non-Patent Citations (3)
| Title |
|---|
| "Database systems : the complete book", 1 January 2002, PEARSON EDUCATION INTERNATIONAL, Upper Saddle River, NJ [u.a.], ISBN: 978-0-13-098043-4, article HECTOR GARCIA-MOLINA ET AL: "Database Systems the complete book", pages: 102 - 300, XP055472777 * |
| "SQL-Datenbanken unter Unix. System und Netzwerk Management von Hochverfügbarkeitssystemen", 1 January 2003, BOOKS ON DEMAND, ISBN: 978-3-8330-0121-5, article RALF STEFFLER: "SQL-Datenbanken unter Unix. System und Netzwerk Management von Hochverfügbarkeitssystemen", XP055472726 * |
| See also references of WO2010060764A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010060764A1 (de) | 2010-06-03 |
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