BR112016022367B1 - WIRELESS COMMUNICATION SYSTEM, MAIN DEVICE FOR USE IN THE SYSTEM, MODULE FOR USE IN THE SYSTEM, METHOD IN THE MAIN WIRELESS COMMUNICATION DEVICE, AND METHOD IN THE WIRELESS COMMUNICATION MODULE - Google Patents

Abstract

WIRELESS COMMUNICATION SYSTEM, MAIN DEVICE FOR USE IN THE SYSTEM, MODULE FOR USE IN THE SYSTEM, METHODS, AND COMPUTER PROGRAM FOR WIRELESS COMMUNICATION BETWEEN A MAIN DEVICE AND A MODULE The present invention relates to a main device (100) which provides a service to a module (120) via wireless docking. The main device has a wireless communication main device unit (102) and a near-field receiver (103). When the user places the module close to the main device within a near-field communication distance (153), a near-field transmitter (123) transmits a service search signal comprising a module identifier and a service list of the module for indicating services that are relevant to the module. The master device determines a compatible service definition of services that are available on the master device, and transmits, through the communication master device unit, a service availability signal comprising the module identifier and the compatible service definition through the communication main device unit. The module processor determines whether the received module identifier matches the module identifier and whether either (...).

Description

Field of invention

[001] The invention relates to a wireless communication system comprising a main device and at least one module, the main device being arranged to, through wireless communication, provide at least one service, and the module is arranged for wireless docking to the main device to use the service. The main device may have one or more built-in peripherals and/or may be arranged to couple to at least one external peripheral to constitute a wireless docking environment. Providing a service may involve providing access to a respective peripheral for the module.

[002] The invention further relates to a module, a main device, a method for the main device, a method for the module, and a computer program product for wireless communication between a main device and a module.

[003] The invention relates to the field of wireless communication, for example, via Wi-Fi and, more specifically, to docking a wireless module to a wireless docking environment of a main device and one or more peripherals . In this context, peripherals can be external devices, such as a screen, keyboard, or mouse, or peripherals integrated into a main device, such as a speaker or storage drive. For example, a TV can also be a main device, that is, the main device is integrated into the TV and constitutes a main device in combination with several peripherals. Access and/use of such peripherals and/or any internal or external resources of the main device can be called services provided by a main device.

Background of the invention

[004] Wi-Fi devices can offer all types of services. These can be services like video rendering, audio rendering, printing, using a USB device like a keyboard or mouse over Wi-Fi, etc. Wi-Fi devices can “advertise” these services over Wi-Fi, so that other devices with a Wi-Fi radio can see what Wi-Fi services are available nearby. A Wi-Fi device can also query (“probe”) another Wi-Fi device about what Wi-Fi services it has to offer. Wi-Fi offers several ways to accomplish such pre-association disclosure.

[005] Wireless docking in a system that has a main device and modules can be based on the use of a wireless docking station based on the Wi-Fi concept (as described in the IEEE802.11 specification). The wireless docking station may be a wireless docking master device (called a WDH for “wireless docking master” or master device) that enables a mobile device (called an MD or module) to access a set of peripherals. locally wired or wirelessly connected to the main device (such as a USB mouse, an HDMI display, a Bluetooth headset) through a set of general message exchange protocols over a wireless link (e.g. example, Wi-Fi). A primary device coupled together with one or more wired or wireless peripherals is called a wireless docking environment. A master device can also be an additional mobile device that has one or more services available for a module. Wireless anchoring is known, for example, from WO 2012/117306A1. A wireless docking station allows secure wireless communication between at least one slave device and one master device.

[006] The wireless docking host device may provide information about its presence through a Wi-Fi notice that modules can be used to select and initiate connections to a chosen host device. Alternatively, near field communication (NFC) tags associated with the host device or other out-of-band means (such as using the communications interface of a wireless power system) can be used to communicate with a main device to which it will be anchored. The use of NFC for out-of-band device disclosure is known, for example, from chapter 3.1.2.7 of the DRAFT Wi-Fi Peer-to-Peer (P2P) Technical Specification v1.3.32, available from the Wi-Fi Alliance, Technical Committee P2P Task Group, through http://www.wi-fi.org/specifications.php or the Wi-Fi Protected Setup document for pairing with NFC, available from

[007] http://msdn.microsoft.com/en-us/library/windows/hardware/dn481543%28v=vs.85%29.aspx, referred to as the Wi-Fi P2P P2P standard in this document. Additionally, the term “out-of-band” means other than the main wireless radio band. For example, there is talk about an out-of-band channel, which means a communication method that is of a different type, for example, NFC versus Wi Fi.

[008] Document US2013/0029596 describes the pairing of wireless devices (BLUETOOTH) using data exchanged over an out-of-band channel (NFC). Two devices are determined to be within near field communication (NFC) range of each other and pairing information for a service is carried over the out-of-band channel. Conducting pairing information may require the first device to request at least one desired service and provide a device ID. In response, the second device may, via the out-of-band channel, deny the request or convey resource usage parameters for the desired service and an ID to the second device. Pairing the two devices can use resource usage parameters.

[009] Document WO2013/111537 discloses a communication system of a camera and a printer. Devices can communicate in a first mode (NFC) or in a second mode (Wi-Fi P2P). Booting into a first mode and transferring between both modes are described.

[010] The Wi-Fi alliance document “Wi-Fi Simple Configuration Technical Specification” v2.0.2 describes, in section 10 “NFC Out-of-Band Interface Specification” the use of NFC as an out-of-band channel for Simple Configuration Wi-Fi. A password token or a configuration token that defines a WLAN configuration can be exchanged via NFC.

[011] Document US2011/0210820 describes a system for simply and securely pairing multiple Bluetooth devices or other wireless electronic devices on a network. Multiple read-only Near Field Communication (NFC) tags are located in a vehicle or other defined space so that users of NFC-enabled electronic devices can hover their device near one of the NFC tags, which then transfers encryption key data to the user's device, allowing the device to automatically join a small, secure wireless network.

[012] Document US 2011/0275316 describes a communication system that uses near-field communication at out-of-band initialization for connection adjustment for device-to-device communication.

Summary of the invention

[013] The user of a Wi-Fi device can select a device that offers one or more services from a list of devices found in range and can attempt to connect to it to use a service. Establishing this connection is time-consuming, several seconds to several tens of seconds, and typically requires user intervention, such as reading a PIN code from the device to connect to and enter into your own device.

[014] Since the range of Wi-Fi signals can reach tens of meters, a large number of devices offering Wi-Fi services can be found within the Wi-Fi range. The user can be involved in selecting the correct device/service to connect. However, from the list of devices/services presented to the user, it may not be very clear which entry corresponds to which device.

[015] It is an object of the invention to provide a system for wireless docking that allows the definition of a connection and the acquisition of services while reducing the amount of user interaction and time required.

[016] For this purpose, according to a first aspect of the invention, in the wireless communication system as described in the opening paragraph, the main device comprises - a main communication device unit for accommodating wireless communication, - a near-field receiver for near-field communication with a near-field transmitter over a near-field operating distance of maximum one meter, - a main device processor coupled to the main communication device unit and the near-field receiver , and arranged for docking the module, the module comprising: - a module unit for communication to accommodate said wireless communication, - a module processor arranged to dock to the main device, - a near field transmitter for the near-field communication with a near-field receiver across the near-field operating distance, - wherein the near-field transmitter is arranged for transmitting a service poll signal comprising a module identifier and a service list of the module for indicating services that are relevant to the module, and - wherein the processor of the main device is arranged to, upon receipt of the service search signal via the near-field receiver,

[017] determine a set of compatible services by compatibility of the module's service list with the services that are available on the main device,

[018] generate a service availability signal comprising the module identifier and the set of compatible services for indicating compatible services that are relevant to the module and are available via wireless anchoring, and

[019] transmit the service availability signal through the main communication unit, and - wherein the module processor is arranged to, upon receipt of the service availability signal through the communication module unit, determine whether the identifier received module corresponds to the module's module identifier and whether any of the supported services are actually required by the module, and, if so, initiate wireless docking with the master device via the communication module unit.

[020] For this purpose, a main device for use in the above system is arranged for wireless anchoring to provide a service and comprises - a main communication device unit for wireless communication, - a near-field receiver for communication of near-field with a near-field transmitter across the near-field operating distance, and - a processor of the main device coupled to the communication unit of the main device and the near-field receiver, and arranged for docking of the module, - wherein the processor of the main device is arranged to, upon receipt of the service poll signal through the near-field receiver,

[021] determine a set of compatible services by matching the module service list with the services that are available on the main device,

[022] generate a service availability signal comprising the module identifier and the set of compatible services for indicating compatible services that are relevant to the module and are available through wireless anchoring, and

[023] transmit the service availability signal through the main communication device unit.

[024] For this purpose, a module for use in the above system is arranged for wireless docking in the main device for use of a service and comprises - a communication module unit for wireless communication, - a module processor arranged for anchoring in the main device, - a near-field transmitter for near-field communication with a near-field receiver over the near-field operating distance, - wherein the near-field transmitter is arranged for transmitting a search signal service comprising a module identifier and a module service list for indicating services that are relevant to the module, and - wherein the module processor is disposed to, upon receipt of a service availability signal through of the communication module unit, wherein the service availability signal comprises a module identifier and a set of compatible services for the indication of compatible services that are relevant to the module and are available on the main device, determine whether the received module corresponds to the module's module identifier, and whether any of the supported services are actually required by the module, and, if so, initiate wireless docking to the main device through the communication module unit.

[025] For this purpose, a wireless communication master device method is provided for use in the above system in a master device comprising a communication master device unit for wireless communication, and a near-field receiver for communication. field with a near-field transmitter over a near-field operating distance of maximum one meter. The method, in the main device, comprises, upon receiving a service search signal through the near-field receiver, the service search signal comprising a module identifier and a module service list for indicating services. that are relevant to the module, - determine a set of compatible services by matching the module's service list with the services that are available on the main device, - generate a service availability signal comprising the module identifier and the set of compatible services for indicating compatible services that are relevant to the module and are available through the wireless docking, and - transmitting the service availability signal through the communication master device unit. and, upon initializing wireless docking via the module, - docking the module to the main device to use the service.

[026] For this purpose, a method of the wireless communication device to be anchored is provided for use in the above system in a module comprising a communication module unit for wireless communication, and a near-field transmitter for communication. field with a near-field receiver across the near-field operating distance. The near-field transmitter is arranged for transmitting a service search signal comprising a module identifier and a module service list for indicating services that are relevant to the module. The method, in the module, comprises receiving a service availability signal through the communication module unit, wherein the service availability signal comprises a module identifier and a set of compatible services for indicating services compatible services that are relevant to the module and available on the primary device, determine whether the received module identifier matches the module's module identifier and whether any of the supported services are actually required by the module, and, if so, initiate docking wirelessly into the main device via the communication module unit.

[027] The methods according to the invention can be implemented on a computer as a computer-implemented method or on dedicated hardware or in a combination of both. Executable code for a method according to the invention may be stored in a computer program product. Examples of computer program products include memory devices, optical storage devices, integrated circuits, servers, online software, etc. Preferably, the computer program product contains non-transitory program code means stored on a computer-readable medium for carrying out a method according to the invention when said program product is executed on a computer. In one embodiment, the computer program comprises computer program code means adapted to perform all steps of a method according to the invention when the computer program is executed on a computer. The computer program may be incorporated into a computer-readable medium.

[028] The measures have the effect of wireless communication for the anchor to be configured as follows. The term “wireless docking” means the wireless docking of the module and the main device for the use, through the module, of a service provided by the main device, while “initiating docking” means starting the connection setting with the device principal for use of one or more of the supported services. Firstly, a message, the service search signal, is transferred from the module, i.e., the device requiring a service, to the main device via near-field communication. The service search signal includes a module identifier and a module service list for indicating services that are relevant to the module. Advantageously, any master device that receives the service poll signal via a near-field communication channel will be aware of the module that is present in near range, i.e. within the near-field operating distance of at most one meter. Subsequently, upon receipt of the service search signal, the master device will determine whether it can offer one or more of the services among the numerous services as indicated in the module's service list by the module. If so, a set of compatible services is formed by matching the module's service list with core device services that are available through anchoring, and a service availability signal comprising the module identifier and the set of compatible services for indicating compatible services that are both relevant to the module and available through anchoring. The service availability signal is transmitted through the communication master device unit and received by the communication module unit. The module processor, upon receipt of the service availability signal, will determine whether the received module identifier matches the module's module identifier, and whether any of the supported services are actually required by the module. If so, the module will start wireless tethering to the main device, that is, it will start a connection definition for the use of one or more compatible services. Advantageously, the main device is selected by physically positioning the module close to the main device to allow near-field communication. Furthermore, it is automatically determined whether the master device has available services that are relevant to the module, and such services will be listed in the response signal that is transmitted via wireless communication such as Wi-Fi. Advantageously, the module is now directly , aware of the services available, and will begin docking when appropriate.

[029] Optionally, in the above wireless communication system, the wireless communication is in accordance with a Wi-Fi standard for point-to-point communication and/or the near-field communication is communication via an NFC tag in accordance with Near Field Communication, both described as such in the Wi-Fi P2P standard. Then, on the module, the near field transmitter may be a near field communication tag in accordance with the Near Field Communication standard Near Field (NFC), while the main device has a near-field receiver like an NFC reader. Furthermore, near-field communication may be communication via a data channel via a magnetic field of a wireless battery charging interface, for example, the Qi system. The Qi wireless charging system supports a data communication channel from the device being charged, i.e. the module, with the charger, i.e. a peripheral charging unit coupled to the main device, the channel constituting a charging transmitter. near field in the charged device and a near field receiver in the charger. The QI wireless charging system is described in: “System Description Wireless Power Transfer, Volume I: Low Power, Part 1: Interface Definition Version 1.0.1, October 2010”, available from the Wireless Power Consortium: http:// www.wirelesspowerconsortium.com/.

[030] Optionally, in the module, the near-field transmitter is arranged for transmitting the service search signal which further comprises credential data for defining a secure connection through wireless communication. Optionally, in the host device, the host device processor is arranged to, upon wireless tethering as initiated by the module, apply credential data as received via the service poll signal to define a secure connection via wireless communication. . The credential data may comprise at least one of a PIN code, a public key, or hash of the module's public key. Advantageously, the master device is allowed to apply the credential data during docking, if such docking is initiated by the module later. Advantageously, since credential data is transferred via near-field communication, such data cannot be easily intercepted by other devices, and establishing a secure connection is faster.

[031] Optionally, in the module, the module processor is arranged to, upon receipt of the service availability signal, determine whether the received module identifier corresponds to the module identifier of the module, and, if so, determine that it does not there are compatible services available for the module and/or the compatible services are not required by the module, providing feedback to a user indicating that the required services are not available. Advantageously, the user has quick feedback that no compatible services were found.

[032] Optionally, in the module, the near-field transmitter is arranged for transmitting the service search signal which further comprises channel data for indicating a wireless communication channel to be used for transmitting the availability signal. of service. Furthermore, the near-field transmitter may be arranged for transmitting the service search signal that further comprises out-of-band data for indicating an additional communication modality, other than wireless communication, to be used for transmitting response data from the main device to the module. A communication modality other than WiFi could be, for example, Bluetooth. The response data can be related to supported services and can, for example, be used for anchoring. Optionally, in the main device, the processor of the main device is arranged to, upon receipt of the service search signal, apply channel data as received via the service search signal to select a wireless communication channel for the transmission of the service availability signal, and/or apply out-of-band data for the selection of an additional communication modality other than wireless communication for the transmission of response data from the main device to the module, with the response data are related to supported services. The module processor may be arranged to, upon receipt of response data via the additional communication channel, activate the communication module unit for receiving service availability signal via said wireless communication. Advantageously, since channel data is transferred via near-field communication, a required wireless channel or out-of-band (OOB) channel can be immediately used by the master device, and setting up a secure connection is faster. Additionally, using the OOB channel may require less power for the module and could be used to wake up the module's Wi-Fi radio if it is currently in sleep mode. For example, using NFC to wake up a module's Wi-Fi radio requires the NFC Tag to be electrically connected to the module's processor and indicating that NFC data has been read by the WDH to the module's processor.

[033] Any of the above options can be combined into a device that has the ability to support the module or main device function, and in addition, the P2P Client and P2P Group Owner functions are possible. Furthermore, a single device may serve as the primary device in a first wireless docking environment, and also be a module for a different wireless docking environment. Additional preferred embodiments of the device and method according to the invention are set forth in the appended claims, the disclosure thereof being incorporated herein by reference. Brief description of the drawings

[034] These and other aspects of the invention will become evident and will be elucidated with reference to the embodiments described by way of example in the following description and with reference to the attached drawings, in which:

[035] Figure 1 shows a wireless communication system,

[036] Figure 2 shows an example of a location that has multiple wireless docking environments,

[037] Figure 3 shows a wireless communication system that uses near-field communication via a wireless charger,

[038] Figure 4 shows wireless communication for the use of a service in an exemplary diagram,

[039] Figure 5 shows a wireless communication method for using a service in a module, and

[040] Figure 6 shows a wireless communication method for providing a service on a main device.

[041] The Figures are purely illustrative and are not drawn to scale. In the Figures, elements that correspond to elements already described may have the same numerical references.

Detailed description of the modalities

[042] In this document, wireless docking refers to allowing mobile devices (then called modules, wireless modules or MDs) to connect wirelessly to a main device that provides services, for example, by providing peripherals that are integrated and /or coupled to the primary device so that applications on the mobile device can make use of these services to improve the experience and productivity of functionality/interaction with these applications. Service discovery/disclosure and management of connections to peripherals are carried out by a so-called wireless docking master device (WDH), which provides functionality via a wireless docking protocol.

[043] Possible embedded elements include (without limitation) mobile phones, laptop-type computers, tablet-type computers, portable media players, cameras, electronic watches. Possible WDHs include (but are not limited to) dedicated wireless docking station devices, display devices, audio devices, printers, personal computers (PCs). The primary wireless docking device can also be a small adapter (PC-like) with a display, USB, and audio interface. Possible peripherals include (but are not limited to) mice, keyboards, display devices, audio devices, webcams, printers, storage devices, USB hubs, network interfaces. These peripherals can be wireless and can support standards such as Wi-Fi Serial Bus and Wi-Fi Miracast to make their functionality available wirelessly to other devices such as modules and WDHs. Wired peripherals can be connected to the main device wirelessly (e.g. USB, HDMI, DVI, VGA, analog audio, analog video, etc.). In addition to services that provide access to peripherals, other services may include, for example, providing remote desktop access or access to certain applications, database access (e.g. document archive), network file system access, internet access and specific internet services, home network services such as DLNA or UPnP services, etc.

[044] Generally, the module and the main device each comprise a microprocessor (not shown) that runs suitable software stored in the device; for example, that software may have been downloaded and/or stored in a corresponding memory, for example, a volatile memory such as RAM, or a non-volatile memory such as Flash (not shown). Devices can also be equipped with microprocessors and memories (not shown). Alternatively, the devices may be fully or partially implemented in programmable logic, e.g., field programmable gate array (FPGA). The module and main devices can be implemented, in whole or in part, as a so-called application-specific integrated circuit (ASIC), that is, an integrated circuit (IC) customized for your particular use.

[045] Furthermore, the functions and units as described below may be implemented at least partially in hardware circuits, which may include a processor circuit and a storage circuit, with the processor circuit executing instructions electronically represented in the storage circuits. storage.

[046] Figure 1 shows a wireless communication system. The system includes a main device 100 for wireless communication with one or more modules 120, 130, 140, e.g., mobile phones, laptop-type or tablet-type computers. Only the first module 120 is described in detail below, but additional modules have similar components and functions. The main device is coupled with numerous peripherals 110,111,112 to provide services, for example, rendering audio or video (AV) data. It should be noted that in this document, AV data is used for any type of video data, audio data, or a combination of video and audio data. Peripherals may include video output devices such as a projector or screen 111, graphics input/output devices such as an interactive whiteboard 110 or a touch screen, audio output device such as a speaker system 112 or a headset, user input devices such as a mouse or room control unit; data processing devices such as a data storage unit or a printer.

[047] The main device 100 has a communication main device unit 102 to accommodate wireless communication 152, for example, a Wi-Fi unit, well known as such. The main device additionally has a main device processor 101 arranged to anchor at least one module. The process of docking a wireless device to a wireless master docking device (WDH) is a process of establishing a data link over the available radio channel such as Wi-Fi or Bluetooth, and is known as such, as per discussed above with reference to document WO 2012/117306A1. A description of Bluetooth can be found, for example, in the Bluetooth Specification document, Core Package version 2.1 + EDR, published: July 26, 2007. The docking process involves providing access to one or more services to the module.

[048] Module 120 has a communication module unit 121 to accommodate said wireless communication with the main device. In practice, there may be multiple communication units for this purpose, for example Bluetooth, Wi-Fi and 60 GHz (e.g. WiGig). The module further has a module processor 122 arranged to dock in the main device to, as a module, gain access to at least one service.

[049] One of the ways to make wireless connectivity simpler for the user is wireless tethering. In wireless docking, a so-called wireless docking master device provides a mobile device with various services, with which the mobile device can set up communication at once. Any group of peripheral devices and/or services provided by a primary wireless docking device is called a wireless docking environment. A wireless docking environment may contain a single main device and multiple peripherals, or a wireless docking main device may accommodate multiple (different) wireless docking environments. A master wireless docking device can also make its services available through individual selection. There may also be multiple primary wireless docking devices to dock to within range of a mobile device.

[050] Another way to make the use of a mobile device more convenient for the user is, through a peripheral device, for example, a monitor or a TV, to make its function, its screen, available through wireless communication to the devices furniture. Of course, it may sometimes occur that there are several such wireless peripheral devices within wireless communication range of a mobile device. Miracast technology, which is certified by the Wi-Fi Alliance, is a technology through which this is possible. In the current document, any device in combination with peripherals that provides the functionality of the main wireless docking device to provide access to the input and/or output functions of the peripheral is called a wireless docking environment.

[051] Traditionally, the aforementioned devices may employ Wi-Fi communication to provide their wireless docking environment or function, for example, with the use of Wi-Fi Direct. Setting up a Wi-Fi connection requires performing several steps and exchanging several messages before the two devices are 'joined' via Wi-Fi. This can require a lot of user involvement to make sure the correct devices to be connected, and it takes time during which the user has to wait for the connection to be configured and started. When two devices are associated via Wi-Fi, their Wi-Fi connection is cryptographically protected and an IP connection is established.

[052] Wi-Fi devices can become discoverable through wireless communication. This can be done before two devices are associated, so this is called pre-association discovery. There are several types of pre-association findings. One type is pre-association device discovery by which one can discover a device and some properties of it, such as name, function, etc. This can be done through signaling frames, probe request frames and probe response frames, well known from IEEE 802.11. Another type is pre-association service discovery, with which services, for example printing, display, etc., offered by one Wi-Fi device can be discovered by others through 802.11u GAS protocol frames ( “Generic Advertisement Service”. This discovery may include information about wireless docking environments being offered for wireless docking.

[053] Since the range of Wi-Fi signals can reach tens of meters, a large number of devices offering Wi-Fi services can be found within the Wi-Fi range. The user needs to be involved in selecting the correct device/service to connect. However, from the list of devices/services presented to the user, it may not be very clear which name corresponds to which device. For example, a user is interested in displaying content that resides on their mobile MP4 player on a large screen. Miracast is the Wi-Fi Alliance trade name for a service that displays video received over Wi-Fi. There may be multiple screens near the user that offer the service for rendering video received over Wi-Fi. This may be the case in a modern office building, with many meeting rooms and flexible workspaces equipped with Miracast-enabled screens, but also in a domestic situation, where a home is equipped with multiple TVs offering this Wi-Fi service.

[054] The user's MP4 player displays all devices where an advertisement for a video rendering service over Wi-Fi is seen. The user must select one of the devices. The user must then set up the Wi-Fi connection (“pair”), which may involve reading a PIN code on the video rendering device and entering it into their MP4 player, or some other means of definition of the connection in a secure way. It is very frustrating for the user if they obtain the PIN code from a different device than the one selected on their MP4 player, due to the fact that the connection cannot then be configured.

[055] Proximity-based methods allow a user to select the desired device that they wish to use by positioning their mobile device close to the desired device. For example, if the mobile device is equipped with an NFC reader and the desired device (main device) is equipped with an NFC tag which, after transmitting data via Wi-Fi, provides information about the services it offers , the mobile device can read information about the provided service and configure a connection accordingly.

[056] However, equipping a device with an integrated NFC reader can be expensive. There may also be a huge amount of legacy devices that do not have a built-in NFC reader. Attaching a static NFC tag to any mobile device would allow the use of a proximity-based method to select a Wi-Fi device/service from a set of Wi-Fi devices/services to automatically set up a connection, without requiring a reader NFC technology integrated into the mobile device. Several issues need to be resolved due to the fact that the information provided by these static NFC tags is static (it needs to be pre-configured previously and cannot be changed during operation except through another manual configuration step) and that the device mobile device is not aware that the static NFC tag is being read.

[057] The system described here allows the use of static NFC tags on mobile devices for proximity-based Wi-Fi service selection. The system also allows the use of other unidirectional proximity-dependent Out-of-Band channels, such as Qi standard wireless charging. In the system, a first Wi-Fi device, usually a main device, can provide services over Wi-Fi. Additionally, the main device is equipped with a near-field receiver to read data from a near-field transmitter in a second Wi-Fi device, generally a module, which together constitute an Out-of-Band channel that provides at least one-way data traffic from the module to the main device.

[058] In Figure 1, the wireless communication system has at least one main device and at least one module. The module has a near-field transmitter 123, for example, an NFC tag. The main device has a near-field receiver 103 for near-field communication 153 with a near-field transmitter 123 over a near-field operating distance of at most one meter. The near-field operating distance depends on the respective type of near-field communication. For example, for NFC, the practical near-field operating distance is about 10 centimeters.

[059] The near-field transmitter is arranged for transmitting a service search signal comprising a module identifier and a module service list for indicating services that are relevant to the module. For example, the indicated service list may be a list of peripherals to which a module may wish to be docked, e.g., WSB (Wireless Serial Bus) Human Interface Device (HID) services. Bus”) for mouse and keyboard, Wi-Fi display service, and Wi-Fi direct printing service. All or a subset of the services may be actually required at the present time, and when all of the required services are present, the module may wish to be docked. Alternatively, the module or its user may choose to anchor also when only a subset or only one of the required services is available.

[060] Said near-field transmission can be initiated by supplying wireless power to a circuit, as present in an NFC tag. The power that becomes available to the transmitter can initiate transmission of the service search signal through near-field communication. Alternatively, the module may be activated by the user, or a control function on the module, to transmit the service poll signal. The main device processor is arranged to, upon receipt of the service poll signal, respond to the service poll signal. Additionally, first, a set of compatible services is determined by compatibility of the module's service list with respect to core device services that are available through docking. Subsequently, a service availability signal comprising the module identifier and the set of compatible services is generated for indicating compatible services that are relevant to the module and are available on the host device for use by the module. Finally, the service availability signal is transferred not through near-field communication, but through the main communication device unit using wireless communication, for example, through Wi-Fi.

[061] The module processor is arranged to, upon receipt of the service availability signal, determine whether the received module identifier corresponds to the module identifier of the module. After matching, it is determined whether any of the supported services are actually required by the module, and if so, initiate wireless tethering to the primary device, i.e., begin setting up connection with the primary device for use of one or more of the supported services.

[062] In such a system, the module may provide a pre-configured identifier with the use of a set of reader circuits from the main device. The master device is configured to read the pre-configured identifier identifiers or service names for one or more services A that are available on the master device to the set of service names/identifiers (Y0, ..., YN). Subsequently, the master device may add the identifier a service name/identifier for services A is compatible with one of the service names/identifiers (Y0, ..., YN). The module is configured to scan wireless communication, e.g., one or more of the wireless channels on which it may operate for WiFi signaling, probe request, probe response and/or GAS response frames, including the X identifier. Furthermore, the module may connect to the host device when a Wi-Fi beacon, a probe request, a probe response and/or GAS response frames including the ) service(s) A is(are) actually required.

[063] Optionally, the information provided through the OOB channel contains credential data such as a PIN code, public key, or public key hash from the mobile device to the primary device offering a service. The credential data can be used in defining a secure WPA-2 connection between the host device and the module. As a result, the user does not have to do anything to authenticate their mobile device to the other Wi-Fi device to set up the connection securely.

[064] Optionally, the information provided via the OOB channel contains information about a Wi-Fi channel that the host device should use to send the Wi-Fi signaling, probe request, probe response and/or the GAS response frames including identifier X. The respective channel will be regularly scanned by the module. As a result, the mobile device does not have to scan all possible channels and will be able to set the connection faster and use less power for its Wi-Fi receiver in the process, as it only needs to listen to one particular channel.

[065] Optionally, the information provided via the OOB channel contains information about a second OOB channel that the first Wi-Fi device can use to provide some feedback or information to the second Wi-Fi device. OOB provides an additional communication modality different from wireless communication, and could be using less power for the second Wi-Fi device to scan one or more Wi-Fi channels (for example, through the use of Bluetooth Low Energy, Zigbee, Qi, NFC, ...) and could be used to wake up the module's Wi-Fi radio if it is currently in sleep mode.

[066] Next, a practical example is discussed in which a static NFC tag is attached to a mobile device and a second case in which the mobile device can be charged wirelessly (inductively) via the Qi standard. In both cases, the Wi-Fi device (main device) offering one or more Wi-Fi services can be equipped with an Out-of-Band receiver for the respective OOB system as described below in more detail, i.e. with an NFC reader or a wireless charger.

[067] In operation, when the mobile device is placed on the NFC reader or wireless charging point of the Wi-Fi device offering one or more Wi-Fi services, the latter will receive the mobile device ID and the desired Wi-Fi service included in the service search signal. If the primary device can provide at least one of the desired services, it responds by posting over Wi-Fi (usually one of the so-called “social” channels) that the desired service is available to the mobile device with the identity provided by the mobile device. mobile device through the OOB channel in the service availability signal. The service availability signal may be included in your Wi-Fi signaling, your probe request, your probe response, and/or your GAS response frames. When the mobile device sees an ad with your identity and desired service, it knows which Wi-Fi device it can connect to to use the published service.

[068] Optionally, the OOB channel may transfer the following information: • PIN code, public key or public key hash from the mobile device to the Wi-Fi device offering a service. • desired channel to receive confirmation/denial of your request. • desired channel for the Wi-Fi channel to use for Wi-Fi service. • information that pertains to a second OOB channel available for use for providing feedback or information.

[069] Optionally, if the Wi-Fi device offering one or more Wi-Fi services cannot provide any or all of the desired Wi-Fi services indicated in the service search signal, it may publish via (usually on one of the “social” channels) that a respective desired service is NOT available, or that none of the desired services are available to the mobile device with the identity provided by the mobile device via the OOB channel. Additionally, the set of supported services may contain a list or table of available and unavailable services. If no compatible service is detected, a specific message can be used that indicates both the module ID and that no service can be made available. When the mobile device observes this advertisement with its identity and the absence of available services, it is aware that the requested service is not available and can quickly inform the user that the desired service is not available. This provides feedback to the user much faster than simply trying to connect and observe which service works or not.

[070] After a certain period of time in which the Wi-Fi device offers one or more Wi-Fi services it has started announcing via Wi-Fi that the desired service is available to the mobile device upon adding the identity X provided by the mobile device in its Wi-Fi signaling, probe request, probe response, and/or GAS response frames, the primary device will stop advertising identity X in its Wi-Fi signaling, probe request, probe response and/or GAS response frames. This can be done, for example, after a fixed period of time, or after a certain period of time that it has not received a Wi-Fi association/connection request from the mobile device to connect to the service, or after a certain period of time after the mobile device has dissociated or disconnected from the service.

[071] In practice, a static NFC tag can be added to a mobile device, which is a much lower cost way of adding an Out-of-Band transmitter to a device. The NFC tag contains the ID of the mobile device and the Wi-Fi services the user may be interested in. The ID can be programmed into the NFC tag by a separate NFC programmer or an available ID on the NFC tag can be programmed into the device. The list of relevant services can also be programmed into the NFC tag, or a predetermined list can already be predefined into the NFC tag. The list of relevant services can be placed in order in terms of priority. The label may be adhered to the housing of the mobile device or be otherwise integrated into the housing of the mobile device. Static information (i.e. identifier and service list) is written to the static NFC tag during a pre-configuration (manual) step, for example using a USB NFC tag writer connected to a PC or through the use of an NFC tag writer which is currently available on many modern smartphones. The same input is entered into the mobile device software. Furthermore, the NFC tag can be electrically connected to the CPU of the mobile device, which makes it possible for the CPU to change the tag contents, for example, change the desired Wi-Fi services based on user input.

[072] In a further example, near-field communication is incorporated by a data channel through wireless charging. Qi wireless charging systems provide a unidirectional communication channel from the device being charged wirelessly to the wireless charger (see, for example, WO 2010/036501). The Qi system can be extended to include the desired mobile device ID and Wi-Fi service in the data that is communicated to the charger using the wireless communication channel provided by the wireless charging system. Assuming the Wi-Fi device offering a service is connected to the wireless charger (e.g. via USB) and the mobile device is the device being charged, the Wi-Fi device offering the service can read the unit information from the mobile device that uses this unidirectional OOB channel and can initiate “advertising” the identity X provided by the mobile device in its Wi-Fi signaling, probe request, probe response, and/or GAS response frames , when a compatibility for the desired service is found.

[073] Figure 2 shows an example location having multiple wireless docking environments. The Figure shows three main devices 251, 252, 253 connected to a set of peripherals, e.g., a screen 210, a projection screen 211, a personal audio device 230 or public speakers 231, a keyboard 240, and a mouse 242. The connection between a respective main device and individual peripherals is not known to the module 220 or its user. Additional peripherals can also be coupled through peripheral interfaces, such as an Ethernet connection for high-speed access to peripherals or for internet access to be used by the modules, a USB interface that can support multiple peripheral connections, or an HDMI connection . Each of the respective main devices 251, 252, 253 may provide one or more wireless docking environments, all of which are available to the module 220. Each main device has a respective near-field receiver 261, 262, 263 for communication of field with a near-field transmitter through a near-field operating distance 272. The module has a near-field transmitter 223 that has its own near-field operating distance 273, which is shown in the Figure as being outside the operating distance of near field of any of the three main devices. The module may select a wireless docking environment by initiating near-field communication with a selected host device by physically positioning the mobile device in the vicinity of one of the near-field receivers 261,262,263 coupled to the respective host device, i.e. , within the near-field operating distance of the respective main device near-field receiver. Such a distance is, in practice, less than one meter, but generally about 10 centimeters.

[074] In one embodiment, a near-field communication is a communication over a data channel through a magnetic field of a battery charging interface.

[075] Figure 3 shows a wireless communication system that uses near-field communication via a wireless charger. In the system, similar to Figure 1, a first device 100 is shown in the role of the main device that provides services via wireless communication with a second mobile device in the role of module 320. The main device is coupled with numerous peripherals 110,111,112 to provide the services, for example, rendering audio or video (AV) data. The main device 100 has a main device communication unit 102 for accommodating wireless communication 152, for example, a Wi-Fi unit, well known as such. The main device additionally has a main device processor 101 arranged to anchor at least one module. Furthermore, the main device is provided with an interface unit 313 for interfacing 304 with the charger having a charging board 330, for example, via USB interface. The charging plate is provided with one or more spirals as schematically shown for magnetic transfer of power to a mobile device placed on the plate. Such charging coils, together with a data receiver circuit, constitute the near-field receiver. The module 320 is provided with a wireless power supply unit 323 for receiving wireless charging power, while also supporting a data channel through charged coils coupled to the charging coils across a near-field operating distance 353. Charged coils, together with a data transmitter circuit, constitute the near-field transmitter.

[076] The mobile device is placed on the charging pad of a wireless charger, said charger being part of a wireless docking environment or coupled to some other Wi-Fi device. service is transferred through magnetic near field communication. Subsequently, a response is published via Wi-Fi 152 including the service availability signal. Subsequently, the mobile device attempts to connect to the Wi-Fi radio 102 of the primary wireless docking device. An example of such a wireless charging system is the QI wireless charging system, further described in: “System Description Wireless Power Transfer, Volume I: Low Power, Part 1: Interface Definition Version 1.0.1, October 2010”, available from the Wireless Power Consortium: http://www.wirelesspowerconsortium.com/

[077] Figure 4 shows wireless communication for the use of a service in an exemplary diagram. The diagram shows a wireless communication protocol 400 of a User's actions, a MD Wi-Fi mobile device Wi-Fi communication unit, a MD mobile device near-field transmitter NF_TX, a device near-field receiver WDH NF_RX wireless docking main device and a WDH Wi-Fi wireless docking main device Wi-Fi communication unit. In a first action [1] MOV MD, the user places the mobile device close to the main device, in particular, within the near-field operating range of the near-field receiver of the main device. Subsequently, in a second action [2] TX SSS, the near-field transmitter of the mobile device MD NF_TX is triggered to transmit the SSS service poll signal comprising a module identifier and a module service list for the indication of services that are relevant to the module. The SSS is received at the near-field receiver of the WDH NF_RX wireless master docking device. Subsequently, in a third DSL action [3], the module identifier and a module service list are transferred to the main device processor and are matched against available services to determine a set of compatible services. Subsequently, the SAS service availability signal comprising the module identifier and the set of compatible services is generated for indicating compatible services that are relevant to the module and are available through the wireless anchoring. Alternatively, the set of supported services may also indicate services that are not available or that no services are available. Subsequently, in a fourth action [4] TX SAS, the service availability signal is transferred from the WDH Wi-Fi communication master device unit to the MD Wi-Fi communication module unit. The module processor determines, upon the receipt of the service availability signal, whether the received module identifier matches the module's module identifier, and whether any of the supported services are actually required by the module. If so, through the action [5] INIT DCK, wireless docking with the main device is initiated by sending a docking request to the main device as explained below. Alternatively, through the action [6] SNA Service Not Available, the mobile device may notify the User that a required service is not available or that none of the required services are available. Optionally, the mobile device may also notify the user that some or all of the required services are available.

[078] The Service Search Signal may contain different types of information, for example, Anchor Service Indication (see Table 2 below)

[079] Module identifier (could be MAC address or any suitable identifier)

[080] Channel Indication

[081] Secondary Channel Indication

[082] PIN code

[083] Public Key

[084] Public Key Hash

[085] PIN Code Indication Public Key Key Hash In order to Public Channel Secondary Channel types to distinguish the information, a Tag Length Value (TLV) encoding can be used. In TLV encoding, an example of a type of information is stored in an attribute. Each attribute contains three fields, 2 fixed-length fields and one variable-length field. Attributes can be placed in a message consecutively without any additional separation.

[086] The first field of an attribute is a fixed-length field and contains the label. The value of the label field indicates the type of information, see, for example, Table 1.

[087] The second fixed-length field of an attribute contains the length of the total attribute or the length of the third variable-length field.

[088] The third field of variable length contains information, for example, in the case of a Docking Service Indication, the third field may, for example, contain “USB Keyboard” or in the case of a PIN Code, “1234”. See also Tables 2a and 2b.

[089] The above is not the only way to encode the various types of information. For example, you can also use XML (Extensible Markup Language). The latter uses many more bits than TLV encoding.

[090] For example, when NFC is used as the near-field channel, attributes may be stored in a so-called NDEF (NFC Data Exchange Format) record, as specified by the NFC Data Exchange Format. NFC. The NDEF Record type should be set to a suitable value, for example, on the MIME media type “application/vnd.wfa.docking”. Tables 3a and 3b show some additional attributes. Table 1 - Example of label definition Table 2a - Examples of Anchor Service Indications that can be used in the third field of the TLV encoding Table 2b – Examples of numeric Anchor Service Indications that can be used in the third field of the TLV encoding Table 3a – Example of some additional attributes Table 3b – Example of some additional attributes, which use numerical coding of the indicated anchoring services as shown, for example, in Table 2b

[091] Alternatively, the Qi data channel can also be used. This data channel in Qi transfers so-called packets. Packages in Qi are basically the attributes as described above. The Header package consists of a Label part and a Length part. The Length part determines the size of the rest of the Qi packet. Qi's maximum packet size is quite small, so an even better numeric or binary encoding of the anchoring services has better use. A numeric encoding encodes a decimal number as one or more ASCII characters that represent the number's numerals. You can store a decimal number, in a byte, like this. A binary encoding of a number uses a bit pattern to encode a number. In the first case, only 10 possible values can be stored in one, and in the last case, 256 possible values.

[092] The SAS Service Availability Signal may consist of a list of anchoring services that the module transmits in its SSS Service Poll Signal, along with the state of each listed service. The state can be Available - Not Available, but the state can include more possibilities, such as “WDH supports the service, but the service is in use by another module”. The service availability signal consists of the following types of information

[093] Anchoring Service Indication (see Tables 4a and 4b)

[094] Module identifier (e.g. MAC address or any suitable identifier, see Table 1)

[095] The Service Availability Signal may be a new Wi-Fi signal (“frame” in Wi-Fi Direct terms) or may be incorporated into existing Wi-Fi frames, such as

[096] Probe Request,

[097] Probe Response,

[098] Signaling Board,

[099] GAS Initial Request Board (Generic Advertising Service)

[0100] GAS Initial Response Chart

[0101] GAS Return Request Table

[0102] GAS Return Response Board

[0103] GAS Frames are also available as Protected GAS frames.

[0104] The Probe Request, Probe Response and Signaling Frames comprise attributes as explained before. New attributes and their Attribute values must be defined for the Anchor Service Indication and the Module Identifier. Anchorage Service Indication values may be, for example, as shown in Table 4a using columns, or Table 4b using numeric values. Table 4b - Examples of Anchor Service Indications that can be used in the third field of the TLV encoding for the Service Availability Signal Table 4b - Examples of numeric Anchor Service Indications that can be used in the third field of the TLV encoding for the Service Availability Signal

[0105] Binary encoding and mixed encodings are also possible.

[0106] In addition to what is shown in Tables 4a and 4b, there could be an Anchor Service Indication representing that there is no Anchor Service available.

[0107] Although GAS frames are differently structured frames than those used for Probe Request frames, Probe Response frames, and Signaling frames, the Service Availability Signal can be added in similar ways as described above to the Request frame. GAS Initial, the GAS Initial Response frame, the GAS Return Request frame, the GAS Return Response frame, and their protected counterparts.

[0108] Figure 5 shows a wireless communication method for using a service on a module. The on-module method enables wireless communication between a module and one or more main devices. The main device and module have been elucidated with reference to Figures 1 and 2. The module is arranged to dock wirelessly to the main device for use as a service, and has a near-field transmitter for near-field communication with a receiver. near-field through near-field operating distance. The method on the module initially starts at START 501 and is triggered by the user placing the module within near-field operating distance of the main device's near-field receiver. Thereafter, in TX_SSS 502, the near-field transmitter transmits a service search signal comprising a module identifier and a module service list for indicating services that are relevant to the module. As described below, the master device can send the SAS service availability signal in response. Subsequently, in RX_SAS 503, upon receipt of the service availability signal, at the DET node 504, it is determined whether the received module identifier matches the module identifier of the module and whether any of the supported services are actually required by the module. If so, the method continues at the INIT_DCK node 505 upon initiation of wireless tethering to the master device. In the DET node 504, if no service availability signal is received, the method may return to the RX_SAS node until a timeout has elapsed. If no service availability signal is received, or if the SAS indicates that no service is available, the user may be notified at the NOT node 508, for example, via an audio signal or displayed message. The user may also be notified at the NOT node 508 if only some services are available, or if the user needs to make a choice between available services. If an available service is selected, the method in the module can continue by starting anchoring at INIT_DCK node 505. The method ends at END node 507.

[0109] Figure 6 shows a wireless communication method for providing a service on a host device. The method on the main device allows wireless communication between a main device and a module. The main device and module have been elucidated with reference to Figures 1 and 2. The main device is arranged for wireless docking for providing a service. The main device has a near-field receiver for near-field communication with a near-field transmitter over a near-field operating distance. The main device method initially starts at START 601 and is triggered by the user placing the module within near-field operating distance of the main device's near-field receiver, and the module's near-field transmitter sends the service poll signal SSS. Subsequently, at RX_SSS 602, the master device detects the receipt of the service poll signal. Subsequently, in MAT 603, the module's service list is compatible with the services that are available on the main device. A SAS service availability signal comprising the module identifier and the set of compatible services is generated for indicating compatible services that are relevant to the module and are available via wireless tethering. In addition to what is shown in Tables 4a and 4b, there could be an Anchorage Service Indication that denotes that there is no Anchorage Service available. In the TX_SAS node 604, the service availability signal is transmitted through the communication master device unit. At INIT node 605, the master device waits for the module to respond upon anchor initiation. If so, at the DOCK_D node, the docking of the respective module is further handled and continues until it finally ends at the FINAL node 607. If no response is received, the method can return to the TX_SAS node 604 to repeat sending the availability signal of service for some predetermined period of time. If still no response is received, the method ends at END node 607.

[0110] In practice, methods can be implemented in the main device software (method in the main device) and in the module software (method in the module), for example, a so-called application. These computer program products are intended for wireless anchoring between a main device and a module, and comprise an operating program for causing a processor to execute the method in the main device or module.

[0111] Although the invention has mainly been explained by embodiments that use wireless docking, the invention is also suitable for any wireless system where a mobile device (which has the module function) needs to connect to an additional wireless device ( which serves as the primary device) to connect to, or share, one or more peripherals or services. It should be noted that the invention can be implemented in hardware and/or software, with the use of programmable components. In practice, the invention can be applied to devices that offer their services over Wi-Fi, such as TVs, monitors, audio systems, printers, USB peripherals, wireless docking stations, etc. The module can be a mobile device like an MP3 or MP4 player that wants to use renderers like TVs, monitors, audio systems over Wi-Fi, and in fact any mobile device, smartphone, tablet, laptop, etc., that wants use services via Wi-Fi (printing, anchoring, internet access, etc.).

[0112] It should be understood that the above description, for greater clarity, described embodiments of the invention with reference to different functional units and processors. However, it will be evident that any suitable distribution of functionality between different functional units or processors can be used without departing from the scope of the invention. For example, functionality illustrated to be performed by separate units, processors, or controllers may be performed by the same processor or controller. Therefore, references to specific functional units should be considered only as references to suitable means of providing the functionality described, and not as indicative of a physical structure or logical or physical organization. The invention may be implemented in any suitable form, including hardware, software, firmware or any combination thereof.

[0113] It should be noted that the term “comprising” does not exclude the presence of other elements or steps other than those mentioned, and the indefinite article “a” or “an” before an element does not exclude the presence of a plurality of such elements; that no numerical references limit the scope of the claims; that the invention can be implemented by means of both hardware and software, and that several “media” or “units” can be represented by the same item of hardware or software, and a processor can perform the function of one or more units, possibly in cooperation with hardware elements. Additionally, the invention is not limited to the embodiments, and the invention lies in each and every innovative feature or combination of the elements described above or mentioned in different mutually dependent claims.

Claims (14)

1. WIRELESS COMMUNICATION SYSTEM, characterized by comprising a main device and a module, wherein the main device (100) is arranged to, through wireless communication, provide at least one service, and the module (120) is arranged for wireless docking in the main device for using the service, the main device comprising: - a main communication device unit (102) for wireless communication, - a near-field receiver (109) for field communication with a near-field transmitter over a near-field operating distance of at most one meter, - a main device processor (101) coupled to the main communication device unit and the near-field receiver, and arranged for anchoring of the module, the module comprising: - a communication module unit (121) for wireless communication, - a module processor (122) coupled to the communication module unit and arranged to anchor to the main device, - a near-field transmitter (123) for near-field communication with a near-field receiver across the near-field operating distance, - wherein the near-field transmitter is arranged for transmitting a service poll signal comprising a module identifier and a module service list for indicating services that are relevant to the module, and - wherein the main device processor (101) is arranged to, upon receipt of the service search signal through the receiver near-field, determine a set of compatible services by matching the module's service list with the services that are available on the host device, - generate a service available signal comprising the module identifier and the set of compatible services for indicating compatible services that are relevant to the module and are available on the main device, and transmitting the service availability signal through the main device communication unit, and - wherein the module's processor is disposed to, upon receipt of the service availability signal through the module's communication unit, determine whether the received module identifier matches the module's module identifier and whether any of the supported services are actually required by the module, and, if so, initiate docking without wire with the main device through the module communication unit. 2. SYSTEM according to claim 1, characterized in that - near-field communication is communication via a data channel through a magnetic field of a battery charging interface (323,330), and/or - wireless communication (152) comply with a Wi-Fi standard for peer-to-peer communication. 3. MAIN DEVICE FOR USE IN THE SYSTEM, as defined in claim 1, characterized in that it is arranged for wireless anchoring for the provision of a service via wireless communication, wherein the main device comprises: - a main device communication unit (102) for wireless communication, - a near-field receiver (103) for near-field communication with a near-field transmitter across the near-field operating distance, and - a main device processor (101) coupled to the communication unit of the main device and the near-field receiver, and arranged for docking the module, - wherein the main device processor (101) is arranged to, upon receipt of the service poll signal through the field receiver next, determine a set of compatible services by matching the module's service list with the services that are available on the host device, generate a service available signal comprising the module identifier and the set of compatible services for indicating compatible services that are both relevant to the module and available on the master device, and transmit the service availability signal through the communication unit of the host device. 4. DEVICE according to claim 3, characterized in that the main device processor (101) is arranged to, upon wireless docking as initiated by the module: - apply credential data as received via the service poll signal to the defining a secure connection through wireless communication. 5. DEVICE according to claim 3, characterized in that the main device processor (101) is arranged to, upon receipt of the service search signal, - apply channel data as received via the service search signal to the selection of a wireless communication channel for the transmission of the service availability signal, and/or - applying out-of-band data for the selection of an additional communication modality other than wireless communication for the transmission of device response data main for the module, and the response data is related to compatible services. 6. MODULE FOR USE IN THE SYSTEM, as defined in claim 1, characterized in that it is arranged for wireless anchoring in the main device for the use of a service through wireless communication, the module comprising: - a module communication unit (121) for wireless communication, - a module processor (122) coupled to the communication module unit and arranged to dock to the main device, and - a near-field transmitter (123) for near-field communication with a near-field receiver through the near-field operating distance, - wherein the near-field transmitter is arranged for transmitting a service search signal comprising a module identifier and a module service list for indicating services which are relevant to the module, and - wherein the module processor is arranged to, upon receipt of a service availability signal through the communication module unit, the service availability signal comprising a module identifier and a set of supported services for indicating compatible services that are relevant to the module and available on the main device, determining whether the received module identifier matches the module's module identifier, and whether any of the supported services are actually required by the module, and if so, initiate wireless docking to the main device via the communication module unit. 7. MODULE according to claim 6, characterized in that the near-field transmitter (123) is arranged for transmitting the service search signal which additionally comprises credential data for defining a secure connection via wireless communication. 8. MODULE, according to claim 6, characterized in that the module processor (122) is arranged to, upon receipt of the service availability signal through the communication module unit, determine whether the received module identifier corresponds to the identifier of the module, and, if so, determine that the supported services are not required by the module, providing feedback to a user indicating that required services are not available. 9. MODULE according to claim 6, characterized in that the near-field transmitter (123) is arranged for transmitting the service search signal which additionally comprises channel data for indicating a wireless communication channel to be used for transmitting the service availability signal. 10. MODULE, according to claim 6, characterized in that the near-field transmitter (123) is arranged for the transmission of the service search signal that additionally comprises out-of-band data for indicating an additional communication modality, different from the wireless communication, to be used for transmitting response data from the main device to the module, with the response data being related to compatible services. 11. MODULE, according to claim 10, characterized in that the module processor (123) is arranged to, upon receipt of response data through the additional communication modality, activate the communication module unit (121) for receipt service availability signal through said wireless communication. 12. MODULE according to claim 6, characterized in that the near-field transmitter (123) is a near-field communication tag in accordance with a Near-Field Communication (NFC) standard. 13. METHOD IN THE MAIN WIRELESS COMMUNICATION DEVICE, for use in a main device in the system, as defined in claim 1, characterized in that the main device (100) is arranged for wireless anchoring for the provision of a service, the device being The main unit comprises - a main communication device unit (102) for wireless communication, - a near-field receiver (103) for near-field communication with a near-field transmitter over the near-field operating distance, wherein the method, in the main device, comprises, upon receipt (602) of a service search signal through the near-field receiver, the service search signal comprising a module identifier and a module service list for indication of services that are relevant to the module, - determine a set of compatible services by matching (603) the module's service list with the services that are available on the main device, - generate a service availability signal comprising the module identifier and the set of compatible services for indicating compatible services that are both relevant to the module and available on the main device, and - transmitting (604) the service availability signal through the main communication device unit, and, upon initializing wireless docking via the module, - docking (606) the module to the main device to use the service. 14. METHOD IN THE WIRELESS COMMUNICATION MODULE, for use in a module in the system, as defined in claim 1, characterized in that the module (120) is arranged for wireless anchoring in the main device for the use of a service, the module being comprises - a communication module unit (121) for wireless communication, - a near-field transmitter (123) for near-field communication with a near-field receiver over the near-field operating distance, - the transmitter field is arranged for transmitting a service search signal (502) comprising a module identifier and a module service list for indicating services that are relevant to the module, and wherein the method, in module, comprises, upon receipt (503) of a service availability signal through the communication module unit, the service availability signal comprising a module identifier and a set of compatible services for indicating compatible services that are both relevant to the module and available on the main device, - determine (504) whether the received module identifier matches the module's module identifier and whether any of the supported services are actually required by the module, and, if so, initiate (505) wireless docking to the main device via the communication module unit.