GB2533106A - Communication system for a vehicle and method for operating such a communication system - Google Patents

Communication system for a vehicle and method for operating such a communication system Download PDF

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Publication number
GB2533106A
GB2533106A GB1421868.9A GB201421868A GB2533106A GB 2533106 A GB2533106 A GB 2533106A GB 201421868 A GB201421868 A GB 201421868A GB 2533106 A GB2533106 A GB 2533106A
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United Kingdom
Prior art keywords
unit
adapter
interface
communication system
head
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.)
Withdrawn
Application number
GB1421868.9A
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GB201421868D0 (en
Inventor
gupta Sameer
Ouellette Matthew
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mercedes Benz Group AG
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Daimler AG
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Publication date
Application filed by Daimler AG filed Critical Daimler AG
Priority to GB1421868.9A priority Critical patent/GB2533106A/en
Publication of GB201421868D0 publication Critical patent/GB201421868D0/en
Publication of GB2533106A publication Critical patent/GB2533106A/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06F13/40—Bus structure
    • G06F13/4004—Coupling between buses
    • G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40267—Bus for use in transportation systems
    • H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mathematical Physics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Information Transfer Systems (AREA)

Abstract

A communication system 1 for a vehicle comprises a head unit 2 that is connected both to an output unit 3 and an operating unit 4, an interface unit 5 (e.g. USB port) for removably connecting an external device 6 (e.g. smart-phone) to the communication system, and an adapter unit 7 that is connected to the head unit and the interface unit. The adapter unit includes a switch 8 for routing signals from the interface unit and is configured to couple the interface unit either directly to the head unit or to a processing unit 10 of the adapter unit, depending on the currently active features of the external device. For example, signals from the external device are routed to the head unit for music playback and to the processing unit of the adapter unit for a navigation service. The adapter unit may be add-on hardware physically distinct from the head unit.

Description

Intellectual Property Office Application No. GII1421868.9 RTM Date:12 June 2015 The following terms are registered trade marks and should be read as such wherever they occur in this document: Apple Google Intellectual Property Office is an operating name of the Patent Office www.gov.uk/ipo Communication System for a Vehicle and Method for Operating such a Communication System The invention relates to a communication system for a vehicle, comprising a head unit that is connected to both an output unit and an operating unit, and an interface unit for removably connecting an external device to the communication system.Furthermore, the invention relates to a method for operating such a communication system.
More and more communication systems or infotainment systems for vehicles feature an interface for removably connecting external devices. These external devices provide additional functionalities to the system or simply additional data for existing functionalities of the system. Data and/or electric power can be provided to the respective units via the respective connections.
DE 10 2007 047 407 Al discloses a head unit interface for connecting external devices like smartphones to a communication system of a vehicle. A head unit being part of the communication system is connected both to an output unit, for instance a display, and an operating unit. A head unit interface is provided between the head unit and the output unit such that the external devices can be connected to the communication system via the head unit interface. The head unit interface can be used as media interface that provides playback of music from a connected device.
It is an object of the present invention to increase the functionality provided by external devices to a communication system of a vehicle.
According to the invention, there is provided a communication system for a vehicle according to independent claim 1. Furthermore, there is provided a method for operating a communication system of a vehicle according to independent claim 8. Further advantages and embodiments are set out according to the dependent claims, the detailed description, and the figures.
A communication system according to the invention comprises an adapter unit being connected to said head unit and said interface unit. Said adapter unit is configured to electronically couple the interface unit either directly to the head unit by bypassing one or more, in particular all, other processing units of the adapter unit for routing signals from the interface unit to the head unit directly, without manipulating them, or to another processing unit of the adapter unit for routing signals from the interface unit to the processing unit of the adapter unit. This coupling may be configured or set in dependence upon a signal or a state of the adapter unit. The processing unit of the adapter unit may be configured to route the signals it receives from or via the interface unit either to the head unit or to other units of the communication system. Under different user scenarios, the external device can be coupled to the head unit or to the adapter unit, depending on a currently active feature of the external device. So, depending on the current needs or functions of the external device, the adapter unit decides how the signals from the interface unit, that is, the signals stemming from the external device, are routed.
This has the advantage that the capabilities or the functionality of the communication system can be extended by simply providing data by the external device as well as by providing new functionalities or features to the communication system by the external device via one single interface. As both of the enhancements may require a qualitatively different handling of the data provided by the external device via the interface unit, by using the adapter unit, these qualitatively different data can be transferred and handled via one single interface, that is, the interface provided by the interface unit. Hence, the functionality of the communication system is enhanced in a reliable and comfortable way.
In a preferred embodiment, the adapter unit is an add-on hardware that is physically distinct from the head unit. In particular, the adapter unit comprises its own housing. This has the advantage, that the adapter unit can be easily replaced, and hence updated. It is not bound to the production and deployment cycles of the car industry that can span several years. It may instead be adapted to the production and deployment cycles of the external devices, for instance smartphones, that span several months to one year.
In another embodiment, the interface unit comprises a universal serial bus port. This is particularly advantageous, as the Universal-Serial-Bus (USB) is very common for consumer electronics and, hence, for external devices expected to be connected to the communication system. Furthermore, as the universal serial bus protocol does not offer point-to-point routing of a signal, the adapter unit is particularly useful by effectively adding that functionality to the interface unit with the Universal-Serial-Bus port.
According to a further advantageous embodiment, the adapter unit, in particular the processing unit of the adapter unit, is configured to monitor, in particular continuously monitor a signal that contains information on whether an external device is connected to or disconnected from the interface unit independent of the interface unit being coupled to the head unit or to the processing unit of the adapter unit. This has the advantage that the adapter unit can track the state of the external device or the interface unit, respectively. Hence, if the external device is disconnected while signals from the interface unit are routed to the head unit directly, the adapter unit, in particular the processing unit of the adapter unit, can track this change. Hence, any new external device that is connected to the interface unit after this disconnection can be routed either to the head unit directly or to the adapter unit according to the requirements. Otherwise, there would be the possibility that a new external device is connected to the interface unit and, hence, its signals routed directly to the head unit, without the adapter unit even noticing. Hence, any situation where signals of an external device are routed directly to the head unit mistakenly is avoided here.
Herein, said signal may comprise a status control signal from a Universal-Serial-Bus chip, in particular a status control signal from a Universal-Serial-Bus hub chip. This has the advantage that by using the status control signal from a USB hub, the adapter unit is able to detect a USB device connect and disconnect event without requiring to implement complex USB data signalling protocol stack. So, this embodiment significantly reduces the implementation complexity in both hardware and software by not requiring to monitor or sniff USB data to detect USB connect and disconnect events. So, this embodiment does not add any additional complexity or delay to the USB data communication architecture. This is extremely useful for add-on USB systems, for instance when the adapter unit is add-on hardware, where the new add-on hardware is not able to control or modify legacy hardware components or units.
In a specifically advantageous embodiment, the adapter unit is configured to automatically couple the interface unit to the processing unit of the adapter unit when said signal contains the information that the external device has been disconnected. This has the advantage that any new external device that is connected to the interface unit will be coupled to the processing unit and, hence, the processing unit can decide if the new external device should be coupled to the head unit directly or not. As the adapter unit can be easily updated to handle currently available external devices, it also has the information about where the signals from the interface unit, i.e. from the external device, should be routed to. Hence, it makes sense to route the signals from the interface unit to the adapter unit in a standard setting and then let the adapter unit decide if the external device, that is the interface unit, should be routed directly to the head unit or remain connected to a processing unit of the adapter unit.
In another advantageous embodiment, the adapter unit comprises a switching unit that is connected to the interface unit and a hub unit that is connected to the head unit. Both switching unit and hub unit are connected to said processing unit. Here, the switching unit can be set to route signals from the interface unit either directly to the hub unit or to the processing unit of the adapter unit. The hub unit can be set to route signals from the head unit either directly to the switching unit or to the processing unit. Both settings are executed in dependence upon control signals from the processing unit to switching unit and hub unit, respectively. This has the advantage that the adapting unit is in full control of the routing or the signals that takes place via the hub unit and the switching unit.
An inventive method for operating a communication system relates to a communication system of a vehicle comprising a head unit that is connected to both an output unit and an operating unit, an interface unit for removably connecting an external device to the communication system, and an adapter unit that is connected to said head unit and said interface unit. The method comprises either the step of coupling the interface unit directly to the head unit by means of the adapter unit, for routing signals from the interface unit to the head unit directly, by bypassing one or more, in particular all, other processing units of the adapter unit, or the step of coupling the interface unit to another processing unit of the adapter unit by means of the adapter unit, for routing signals from the interface unit to the processing unit of the adapter unit. Advantages and advantageous embodiments of the inventive method correspond to advantages and advantageous embodiments of the inventive communication system.
For purpose of extending the infotainment capabilities of vehicles' head units, e.g. bringing Apple's CarPlay® and Google's Android Auto® technologies to vehicles, vehicles are provided with a consumer electronics adapter box CEAB according to the invention. Under different use-case scenarios the external device is to connect to the head unit or to the CEAB depending on the currently active feature. Since CEAB as add-on hardware has the global information about where the external device should be connected the system intelligently decides if the connected device should be connected to the head unit or to the CEAB. Therefore as solution, we always route the external device to the CEAB and let CEAB decide if the device should be routed to the head unit or remain connected to CEAB. The inventive consumer electronics adapter box forms an extended head unit interface.
By considering the following detailed description of an exemplary embodiment in conjunction with the accompanying drawings, the teachings of the present invention can be readily understood, and at least some additional specific details will appear.
Herein: Fig. 1 shows an exemplary embodiment of a communication system for a vehicle; Fig. 2 shows the exemplary embodiment of Fig. 1 in a first state; and Fig. 3 shows the exemplary embodiment of Fig. 1 in a second state.
Identical elements or elements with identical functions are designated with identical reference signs.
Fig. 1 shows an exemplary embodiment of a communication system for a vehicle. The communication system 1 comprises a head unit 2 that is connected both to an output unit 3 and an operating unit 4. Furthermore, the communication system 1 comprises an interface unit 5 for removably connecting an external device 6 to the communication system 1. The interface unit 5 comprises a Universal-Serial-Bus port in the present example. In the current example, the external device 6 is connected to the interface unit 5. The communication system 1 further comprises an adapter unit 7 that is connected to the head unit 2 and to the interface unit 5.
In the present example, the adapter unit 7 comprises a switching unit 8, a hub unit 9, and a processing unit 10. The switching unit 8 may for instance be a Universal-Serial-Bus (USB) switch. The hub unit 9 may for instance be a USB hub. Here, the switching unit 8 is connected to the interface unit 5. In this example, the switching unit 8 is further connected to the hub unit 9 via a first connection 13 and to the processing unit 10 via a second connection 14. The hub unit 9 is connected to the head unit 2 here. In this example, the hub unit 9 is furthermore connected to the switching unit 8 via the first connection 13 and to the processing unit 10 via a third connection 15.
The adapter unit 7 is configured to couple the interface unit 5 either directly to the head unit via the switching unit 8 and the hub unit 9 in the present example, or to the processing unit 10 of the adapter unit 7. The processing unit 10 may be coupled to further interfaces or units of the communication system 1 or other units in the vehicle. In particular, a direct coupling therefore means that a signal that is routed through the adapter unit 7 from the interface unit 5 to the head unit 2 is not changed, in particular not changed with regard to its information content. So, when the interface unit 5 is coupled to the head unit 2 directly, the adapter unit 7 does not comprise any additional functionality here, so it could be replaced by a simple cable.
In the present example, the USB hub unit 9 provides a status control signal 11 to the processing unit 10. In particular, the status control signal 11 is provided to the processing unit 10 continuously. As a consequence, the processing unit 10 knows whether the external device 6 is connected to the interface unit 5 or not. In the present example, the processing unit 10 controls the switching unit 8 via a switching signal 12 and can, hence, determine whether the interface unit 5 is coupled to the head unit 2 directly or to the processing unit 10 of the adapter unit 7. Hence, via the switching signal 12, the processing unit 10 can determine whether a signal from the external device 6 is routed to the hub unit 9 or to the processing unit 10 from the switching unit 8.
Fig. 2 shows the exemplary embodiment of Fig. 1 in a first state. Here, the interface unit 5 is coupled directly to the head unit 2. Accordingly, signals from the interface unit 5 are routed through the first connection 13. The second connection 14 and the third connection 15 are deactivated here, that is, no signals are routed through them from the switching unit 8 in this case. This state can be achieved, for example, after a user has connected an external device, for instance a smartphone, to the interface unit 5 of the vehicle. Then, the external device 6 is first connected to the processing unit 10 of adapter unit 7 by default. When the user activates a feature that requires a direct coupling of the external device 6 or the interface unit 5 to the head unit 2, the processing unit 10 of the adapter unit 7 changes the configuration of the switching unit 8 by the switching signal 12. As a consequence, the shown state of the adapter unit is achieved and signals from the external device 6 are routed to the head unit 2 directly. For instance, the head unit 2 may then access available data such as music songs on the external device 6 and e.g. playback the respective songs for the user.
Fig. 3 shows the exemplary embodiment of Fig. 1 in a second state. Here, the direct first connection 13 is deactivated and the interface unit 5 is coupled to the processing unit 10. In the present example, also the third connection 15 is active, so that signals from the interface unit 5 are routed to the head unit via the processing unit 10.
In the example described before, the user might want to start an additional feature, e.g. after listening to the music for a certain time. For instance, this additional feature could be a navigation service from the external device 6 that he wants to use instead of a built-in navigation of the head unit 2. Since this additional feature, here the navigation service, is an add-on feature that requires additional processing by the processing unit 10 in the present example, in order to activate the additional feature, the external device 6 has to be disconnected from the head unit 2 and connected to the processing unit 10 of the adapter unit 7. Hence, via the switching signal 12, the processing unit 10 triggers the switching unit 8 to change its configuration again and to route signals from the interface unit 5 to the processing unit 10. There, some processing occurs before the information is routed further down to the head unit 2 via the hub unit 9 in the present example. This is the state depicted in Fig. 3.
Next, for instance, the user wants to end the navigation service of the external device 6 and re-enable the built-in navigation service of the head unit 2 and listen to music of the external device 6 again. To enable this, the communication system 1 needs to disconnect the external device 6 from the processing unit 10 and to connect it back to the head unit 2 directly via the first connection 13. This is achieved by changing the configuration of the switching unit 8 by the switching signal 12 to activate the first connection 13 and to route signals from the interface unit 5 directly to the head unit 2. Then, the state that is depicted in Fig. 2 is re-established.
Finally, in the present example, e.g. while listening to music of the external device 6, the user reaches his destination and disconnects the external device 6. As the processing unit 10, for example a system-on chip, checks the device status information from the USB hub unit 9 by the status control signal 11 it detects the device disconnect status. This causes the processing unit 10 to switch the switching unit 8 and to activate the second connection 14 and to deactivate the first direct connection 13 so as to route any signal from the interface unit 5, that is any signal from a new external device that will be connected to the interface unit 5 in the future, to the processing unit 10. Then, the state of the exemplary embodiment is similar to that shown in Fig. 2, where, in addition, the third connection 15 is deactivated. Hence, when a new device is connected to the interface unit 5, the processing unit 10 can decide whether it will route signals to the head unit 2 by activating the third connection 15 in this example or route the signals through the first direct connection 13 directly to the head unit 2 by switching or reconfiguring the switching unit 8.
List of reference signs 1 communication system 2 head unit 3 output unit 4 operating unit interface unit 6 external device 7 adapter unit 8 switching unit 9 hub unit processing unit 11 status control signal 12 switching signal 13 first connection 14 second connection third connection

Claims (8)

  1. Claims 1. A communication system (1) for a vehicle, comprising - a head unit (2) that is connected both to an output unit (3) and an operating unit (4); and - an interface unit (5) for removably connecting an external device (6) to the communication system (1), - characterised by an adapter unit (7) that is connected to said head unit (2) and said interface unit (5), - wherein said adapter unit (7) is configured to couple the interface unit (5) either directly to the head unit (2) for routing signals from the interface unit (5) to the head unit (2) directly or to another processing unit (10) of the adapter unit (7) for routing signals from the interface unit (5) to the processing unit (10) of the adapter unit (7).
  2. 2. The communication system (1) according to claim 1, characterised in that the adapter unit (7) is an add-on hardware physically distinct from the head unit (2), in particular with its own housing.
  3. 3. The communication system (1) according to any one of the preceding claims, characterised in that the interface unit (5) comprises a Universal-Serial-Bus port.
  4. 4. The communication system (1) according to any one of the preceding claims, characterised in that the adapter unit (7) is configured to monitor, in particular continuously monitor, a signal (11) that contains information on whether an external device (6) is connected to or disconnected from the interface unit (5) independent of the interface unit (5) being coupled to the head unit (2) or to the processing unit (10) of the adapter unit (7).
  5. 5. The communication system (1) according to claim 3 and 4, characterised in that said signal (11) comprises a status control signal from a Universal-Serial-Bus chip, in particular a status control signal form a Universal-Serial-Bus hub chip.
  6. 6. The communication system (1) according to claim 4 or 5, characterised in that the adapter unit (7) is configured to automatically couple the interface unit (5) to the processing unit (10) of the adapter unit (7) when said signal (11) contains the information that the external device (6) has been disconnected.
  7. 7. The communication system (1) according to any one of the preceding claims, characterised in that the adapter unit (7) comprises a switching unit (8) that is connected to the interface unit (5) and a hub unit (9) that is connected to the head unit (2), wherein the switching unit (8) can be set to route signals from the interface unit (5) either directly to the hub unit (9) or to the processing unit (10), and/or the hub unit (9) can be set to route signals from the head unit (2) either directly to the switching unit (8) or to the processing unit (10), both in dependence upon control signals from the processing unit (10) to switching unit (8) and hub unit (9), respectively.
  8. 8. A method for operating a communication system (1) of a vehicle comprising a head unit (2) that is connected both to an output unit (3) and an operating unit (4), an interface unit (5) for removably connecting an external device (6) to the communication system (1) and an adapter unit (7) that is connected to said head unit (2) and said interface unit (5); the method comprising the steps: - coupling the interface unit (5) directly to the head unit (2) by means of the adapter unit (7), for routing signals from the interface unit (5) to the head unit (2) directly; or - coupling the interface unit (5) to another processing unit (10) of the adapter unit (7) by means of the adapter unit (7), for routing signals from the interface unit (5) to the processing unit (10) of the adapter unit (7).
GB1421868.9A 2014-12-09 2014-12-09 Communication system for a vehicle and method for operating such a communication system Withdrawn GB2533106A (en)

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GB1421868.9A GB2533106A (en) 2014-12-09 2014-12-09 Communication system for a vehicle and method for operating such a communication system

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GB1421868.9A GB2533106A (en) 2014-12-09 2014-12-09 Communication system for a vehicle and method for operating such a communication system

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GB2533106A true GB2533106A (en) 2016-06-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018172640A1 (en) * 2017-03-24 2018-09-27 Renault S.A.S Method for equipping a host with a usb device

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Publication number Priority date Publication date Assignee Title
EP1895717A1 (en) * 2006-08-28 2008-03-05 Siemens Aktiengesellschaft Method and arrangement for transmitting different data streams over a hardware interface bus
DE102007047407A1 (en) * 2007-09-17 2008-03-27 Daimler Ag Communication system for motor vehicle, has head unit interface provided between processor device and output unit, and external communication devices connected to communication system by interface
US20100313132A1 (en) * 2009-06-04 2010-12-09 Link Ii Charles M Removable modular universal telematics services engine for an audio-visual control unit in a vehicle
EP2369490A1 (en) * 2009-11-30 2011-09-28 Funai Electric Co., Ltd. Switching control system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1895717A1 (en) * 2006-08-28 2008-03-05 Siemens Aktiengesellschaft Method and arrangement for transmitting different data streams over a hardware interface bus
DE102007047407A1 (en) * 2007-09-17 2008-03-27 Daimler Ag Communication system for motor vehicle, has head unit interface provided between processor device and output unit, and external communication devices connected to communication system by interface
US20100313132A1 (en) * 2009-06-04 2010-12-09 Link Ii Charles M Removable modular universal telematics services engine for an audio-visual control unit in a vehicle
EP2369490A1 (en) * 2009-11-30 2011-09-28 Funai Electric Co., Ltd. Switching control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018172640A1 (en) * 2017-03-24 2018-09-27 Renault S.A.S Method for equipping a host with a usb device
FR3064381A1 (en) * 2017-03-24 2018-09-28 Renault S.A.S. METHOD FOR EQUIPPING A USB DEVICE WITH A HOST

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