EP3308283A1 - Verfahren zur steuerung von einheiten mit einem leicht erkennbaren datenrahmen - Google Patents
Verfahren zur steuerung von einheiten mit einem leicht erkennbaren datenrahmenInfo
- Publication number
- EP3308283A1 EP3308283A1 EP16725368.1A EP16725368A EP3308283A1 EP 3308283 A1 EP3308283 A1 EP 3308283A1 EP 16725368 A EP16725368 A EP 16725368A EP 3308283 A1 EP3308283 A1 EP 3308283A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- unit
- data frame
- communication protocol
- data
- primary communication
- 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
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
Definitions
- the invention describes a method for controlling electronic units with an easily recognizable data frame.
- mobile communication devices such as a mobile phone
- SIM subscriber identity module
- - card subscriber identity module
- USIM subscriber identity module
- eUICC embedded universal integrated chip card
- Both mobile phones and other devices with eUICC have complex circuit structures with superordinate and subordinate units.
- Parent and subordinate units form a so-called master-slave hierarchy, with a higher-level unit corresponding to a master and a subordinate unit to a slave. This means that a higher-level unit controls a subordinate unit.
- SIM, USIM and eUICC are among the subordinate units. These units are interconnected by lines and possibly other units.
- a reset is necessary in the prior art, which can be triggered by various mechanisms.
- One mechanism is to reset the entire device to a defined state.
- signal lines, each resetting a subordinate element are used by the subordinate elements having a corresponding input (reset) or the voltage supply is suitably manipulated, eg, usually by means of a switching element.
- communication protocols for embedded security elements that are suitable for full-duplex serial connections are known in the prior art. These communication protocols are particularly applied to Universal Asynchronous Receiver Transmitters, abbreviated to UART, or Serial Peripheral Interface, abbreviated to SPI.
- a subordinate unit for example the embedded security element
- a higher-order unit for example a central processing unit of the apparatus, eg a mobile telephone.
- the parent and slave units communicate with each other by means of a primary communication protocol, the communications protocol providing data frames with an error check and a minimum protocol length.
- a problem in the prior art is that for switching off or resetting a unit, in particular a subordinate unit, an additional unit and additional lines are necessary, which is e.g. an increased circuit complexity means that leads among other things to high production costs for large quantities.
- subordinate units can only be reset together with all other units of the device, which is often not necessary at all, and also results in a high time requirement of the entire device for a reboot.
- the invention discloses a method for controlling and monitoring a first unit by a second unit, wherein the first unit is electrically connected to the second unit, wherein the first and the second unit with each other on the basis of a primary communication protocol communicate, wherein the second unit sends a data frame to the first unit to control the first unit, wherein the method is characterized in that the data frame only by an electronic circuit of the first unit itself, ie only evaluated by hardware, without the support of a program.
- the data frame is not defined by the primary communication protocol. This has the advantage that the invention can be used independently of the communication protocol used.
- the data frame is simply recognized by means of the electronic circuit of the unit itself, that is to say hardware, and preferably with respect to a faulty transmission, for instance by means of a test value, e.g. a so-called cyclic redundancy check, abbreviated CRC, to the same extent as transmissions of the primary protocol.
- a test value e.g. a so-called cyclic redundancy check, abbreviated CRC
- the communication by means of the data frame according to the invention can be regarded as communication based on a second communication protocol.
- a unit according to the invention comprises e.g. a processor for data processing, which has corresponding registers, e.g.
- Control register and status register an interface for sending and receiving data eg of the data frame according to the invention and a volatile and / or non-volatile memory.
- a further advantage is that even a data frame containing only the test value possibly provided can already be used to control, for example reset or switch off an integrated unit.
- the unit is controlled by the data frame depends on how drop a 'control action, for example, or reset, is defined already during the production. If you want to be independent of this definition, it is advisable that the data frame additional information is added, for example, controls a reset or shutdown, for example by means of a byte before the test value, for example, to effect up to eight different controls, eg switch on, switch off, shut down, restart, as explained in more detail below.
- the data frame whether with or without additional information, is not defined by the primary communication protocol.
- An alternative, second embodiment will be described below.
- Another advantage is that many previously necessary lines and electronic circuits can be saved due to the invention. This means that, for example, more free space is available on a circuit board and the production costs decrease.
- the program for controlling a subordinate unit, eg the first unit can be easily integrated into a program for communication control of the superordinated unit, eg the second unit.
- no additional unit outside the first or second unit is necessary for the application of the invention.
- the data frame controls the first unit in that the first unit is reset by the data frame containing information about the resetting of the first unit, the information not being defined by the primary communication protocol. As described above, the information may be realized, for example, by a byte preceding the test value.
- a further advantageous embodiment is that the data frame controls the first unit in that the first unit is switched off by the data frame containing information about the deactivation of the first unit, the information not being defined by the primary communication protocol.
- the information may be realized, for example, by a byte preceding the test value.
- a further advantageous embodiment is that the data frame controls the first unit in that the first unit is requested by the second unit to send an operating state to the second unit, wherein the data frame contains information about the request of the operating state of the first unit, wherein the information is not defined by the primary communication protocol.
- the information may be realized, for example, by a byte preceding the test value.
- Another advantageous embodiment is that when the first unit is requested by the second unit to send the operating state to the second unit, then the first unit generates the data frame and sends it to the second unit, the second unit only using the data frame own electronic circuit without support evaluation of a program.
- the advantage is that the inventive concept can also be applied in the reverse direction, ie that the first unit generates a data frame according to the invention and transmits it to the second unit, wherein the second unit is in this case able to use the data frame according to the invention only the own circuit, ie hardware to recognize and evaluate, since the data frame is not defined by the primary communication protocol used.
- Another advantageous embodiment is that the electronic circuit in the first and the second unit when sending the data frame generates a checksum and appended to the data frame and checks the receiving sum of the data frame. This has the advantage that erroneous data frames are avoided.
- a further advantageous embodiment is that the electronic circuit in the first and the second unit performs a length determination of a received data frame according to the invention. This is to determine whether it is a communication according to the primary or the second communication protocol according to the invention.
- a further advantageous embodiment is that if it is determined in the length determination that a definable minimum data length of the primary communication protocol is exceeded by the received data frame, then a control or monitoring function is triggered in the unit which has received the data frame according to the invention.
- the control function may, for example, result in a restart of the unit.
- the monitoring function may result in the first unit transmitting its operating state to the second unit, eg the first unit processes a request.
- the empty data frame is used to create a subordinate element, here the first unit, e.g. off. Every other data frame turns on the first unit.
- a data frame with data is used to set a first hardware register of the first unit.
- This first hardware register is used to control the first unit, eg to turn the first unit on or off.
- a data frame without data requests the transmission of data from a second hardware register of the first unit.
- the second hardware register is used to monitor the first unit, for example, to determine an operating state of the first unit, for example, the first unit is turned on or off or the first unit is in operation.
- a single hardware register of the first unit can also be used.
- Another advantageous embodiment is that when the first unit receives the data frame according to the invention without payload data from the second unit, then the first unit, with the exception of an interface of the first unit for sending and receiving data for communication with the second unit, turns off , This has the advantage that very specifically the first unit can be switched off, for example, to save energy or to restart the first unit targeted later, while all other existing units perform their function.
- a further advantageous embodiment is that upon receipt of the data frame according to the invention by the interface of the first unit, while the first unit is turned off, the first unit is turned on again. This has the advantage that specific units can be restarted, switched on or off, for example, by means of the present invention, without other units also having to be restarted, switched on or switched off, for example.
- a further advantageous embodiment is that upon receipt of the inventive data frame without user data by the first unit, the monitoring function is triggered in such a way that the first unit sends a status message to the second unit.
- a further advantageous exemplary embodiment is that upon receipt of the inventive data frame with user data by the first unit, a control function is triggered in such a way that at least part of the user data or the entire user data is written to a control register of the first unit.
- the electronic circuit of the first unit automatically sends the contents of the status register to the second unit when changes are made in a status register.
- a further advantageous embodiment is that the data frame has a destination address or a protocol identifier for identifying the communication protocol used.
- the advantage is that by means of the destination address or the protocol identifier easily determines the communication protocol used and it is recognized from the following whether the received data frame is also defined by the communication protocol.
- the second unit is a central processing unit.
- any other suitable circuit can be used, which circuit is to be understood here in general, it can also be a whole device.
- the first unit is a computing unit, an interface for inputting and outputting data and / or a security element.
- the first unit may also be a device, as also described above with regard to the second unit.
- the security element is a SIM card.
- the security element may e.g. also an M2M card, a USIM, a UICC card or a chip card.
- the method is used on a mobile communication device. As a mobile communication device, e.g. Smartphones, tablet computers, laptops or other suitable devices in question, the data received, process and resend.
- the mobile communication device is a mobile phone.
- the data frame is defined by the primary communication protocol. This facilitates integration of the invention into existing systems.
- the data frame of the primary communication protocol has a field for a protocol identifier of a sub-communication protocol to control the first element by means of the sub-communication protocol.
- FIG. 1 shows an example of a unit in which the method according to the invention can be used.
- FIG. 2 shows a basic structure of a data frame.
- FIG. 3 shows a minimum length of a data frame.
- FIG. 1 shows an example of a unit in which the method according to the invention can be used.
- a CPU 6 is arranged on a first board 2.
- the CPU 6 is electrically connected to an interface 8, a SIM card 10 and a processor 12 for special tasks, such as encryption.
- the interface 8 is available for data exchange to the outside.
- the CPU 6 is connected to another CPU 14 with the CPU 14 on a second board 4.
- the CPU 6 is the second unit and the SIM 10 is the first unit.
- the interface 8, the special task processor 12, or the CPU 14 may be considered.
- the purpose of the invention is that individual units, such as the interface 8, the SIM 10, the processor 12 or the CPU 14, for example, individually reset or restarted or can be switched off without the entire system or the entire unit reset , restarted or shut down.
- Another application example according to the invention is to query an operating state of a unit, such as the interface 8, the SIM card 10, the processor 12 or the CPU 14 by the CPU 6.
- a data frame is generated by a second unit, for example the CPU 6, which represents a higher-level unit, and sent to a first unit, for example the interface 8, SIM card 10 or the processor 12.
- the data frame according to the invention has a check value CRC in order to achieve protection against transmission errors.
- FIG. 2 shows a basic structure of a data frame.
- the data frame comprises payload data ND, a protocol identifier PID to identify the communication protocol used, and a check value CRC to guard against transmission errors.
- FIG. 3 shows a minimum length of a data frame consisting of protocol identifier PID and check value CRC, the data frame having no user data here.
- the protocol identifier PID and the check value CRC each have a length of 2 bytes.
- FIG. 4 shows an embodiment which comprises a data frame with useful data ND with a length of e.g. 1 byte and a check value CRC with a length of 2 bytes. It is a data frame that is no longer within a definition of the primary communication protocol used. If this data frame is from a subunit, e.g. SIM card 10, then recognizes only the electronic circuit of the SIM card 10 that it is a data frame according to the invention, which does not meet the definition of the communication protocol used and according to the invention for a corresponding control purpose, such as. a reboot of the SIM card is used. Further examples of a controller would be the switching on / off of a supply voltage of the SIM card 10 or triggering of an interrupt.
- the effect according to the invention is that a subordinate unit is controlled by means of a data frame, wherein the data frame according to the invention does not correspond to the definition of the primary communication protocol used and the data frame is generated directly by means of the unit, wel che receives the data frame, eg as here the SIM card 10, detected and evaluated.
- the check value CRC ensures that the data frame is not a randomly transmitted data frame, but that the check value CRC for a unit that receives the data frame, eg the SIM card 10, ensures that the Data frame with knowledge and will of a sending unit, as here eg the CPU 6, was generated and sent.
- FIG. 5 shows, as a further embodiment according to the invention, a further shortened data frame, which only has the check value CRC.
- a receiving unit e.g. the SIM card 10 recognizes from the CRC check value that there is no transmission error in the data frame.
- the data frame in Figure 5 may be e.g. be used to indicate an operating condition e.g. the SIM card 10 and connected to e.g. to return the CPU 6.
- the SIM card 10 generates a data frame according to the invention with a length of e.g. 3 bytes, which is sent back to the CPU 6.
- the data frame comprises, for example, 1 byte with user data and 2 bytes for the test value CRC.
- the CPU 6 can recognize and evaluate the data frame by means of its own electronic circuit, without requiring the support of a program, e.g. an operating system is needed.
- This readout of the operating state can be advantageously used in particular in embedded systems, since in these systems monitoring of the operating state is possible only with a very high effort.
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Communication Control (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015007614.0A DE102015007614A1 (de) | 2015-06-15 | 2015-06-15 | Verfahren zur Steuerung von Einheiten mit einem leicht erkennbaren Datenrahmen |
| PCT/EP2016/000853 WO2016202423A1 (de) | 2015-06-15 | 2016-05-23 | Verfahren zur steuerung von einheiten mit einem leicht erkennbaren datenrahmen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3308283A1 true EP3308283A1 (de) | 2018-04-18 |
Family
ID=56083981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16725368.1A Ceased EP3308283A1 (de) | 2015-06-15 | 2016-05-23 | Verfahren zur steuerung von einheiten mit einem leicht erkennbaren datenrahmen |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3308283A1 (de) |
| DE (1) | DE102015007614A1 (de) |
| WO (1) | WO2016202423A1 (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5170471A (en) * | 1989-06-09 | 1992-12-08 | International Business Machines Corporation | Command delivery for a computing system for transferring data between a host and subsystems with busy and reset indication |
| US8078788B2 (en) * | 2005-12-08 | 2011-12-13 | Sandisk Technologies Inc. | Media card command pass through methods |
| WO2008029206A2 (en) * | 2006-09-05 | 2008-03-13 | Nokia Corporation | Device interface |
| JP2009130786A (ja) * | 2007-11-27 | 2009-06-11 | Nec Corp | 通信装置、通信システム、および、通信装置間の通信品質監視方法 |
-
2015
- 2015-06-15 DE DE102015007614.0A patent/DE102015007614A1/de active Pending
-
2016
- 2016-05-23 EP EP16725368.1A patent/EP3308283A1/de not_active Ceased
- 2016-05-23 WO PCT/EP2016/000853 patent/WO2016202423A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102015007614A1 (de) | 2016-12-15 |
| WO2016202423A1 (de) | 2016-12-22 |
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