MXPA06010137A - System and method to enable wusb applications in a distributed uwb mac - Google Patents

Abstract

A system and method is provided for incorporating host-device communication in wireless IJSB (WUSB). A host (101) either uses a multicast Distributed Reservation Protocol (DRP) frame on behalf of connected devices (102) to reserve wireless channel resources, a unicast DRP frame or Enhanced Distributed Channel Access (EDCA) with a Poll Frame. In the case of a unicast DRP frame the number of unicast frames sent for reservation depends on the number of connected devices (102).

Description

SYSTEM AND METHOD THAT ALLOWS WUSB APPLICATIONS ON DISTRIBUTED MAC OF UWB Brief Description of the Invention The present invention relates to a system and method that allows serial universal bus wireless applications in an Ultra Wide Band Distributed Media Access Control (MAC). Universal Serial Bus (USB) connection technology is a type of high-speed wired connection that is popular and effective for the personal computer (PC) that is migrating to the areas of consumer electronic devices (CE) and mobile devices The next generation of USB technology is Wireless USB (WUSB) technology and will provide wired USB functionality without the inconvenience of wires and will be based on Ultra Wide Band (UWB) radio. Next, with reference to Figure 1, the common or fundamental topology of a WUSB is an architecture having a bicycle hub-and-spoke shape and comprising a host 101 and at least one connected device 102. In this architecture, all traffic 103 is initiated by host 101 with at least one connected device 102, distributing time slots and data bandwidth to each connected device 102.

REF. 173474 The relationship between the host 101 and at least. your connected device 102 is referred to as a cluster. The connections are point-to-point between the host WUSB 101 and at least its connected device WUSB 102. A host WUSB 101 can logically be connected with a maximum of 127 WUSB devices 102, considered as an informal WUSB grouping. WUSB groupings coexist within a superimposed spatial environment with minimal interference, thus allowing a number of other WUSB groupings to be present within the same radio cell. The WUSB architecture supports dual functions for a device 102 where a device 102 can also provide limited host capabilities. In this dual-function model, this device / host can use the services of a central host 101 (ie, printers) and, in addition, can create a second cluster that provides services on its own as a host for external data access to any existing grouping that is connected to it. This architecture supports a high spatial capacity in small areas, so that multiple devices have concurrent access to high bandwidth. In a wireless USB scenario (WUSB) there is a host 101 and one or more devices 102 that transmit data to the host. In the wireless USB scenario, the host sends an encrypted electrical signal or selective call structure to the devices to request service data. It is expected that the WUSB will use a MACOA UWB MBOA as a means to communicate between a host 101 and the connected devices 102 through the wireless medium, see the Access Control Specification of Wireless MBOA Medium (MAC) for Area Wireless Networks Personal High Speed (WPAN's), Technical Specification ,. Proposal 0.5, April 2004, which is incorporated herein by reference as indicated in its entirety in this document. Because the MBOA UWB MAC is distributed, there is a need for a method by which a host can reserve channel resources in favor of the connected devices 102, so that the connected devices 102 can transmit data when required by the host. Host 101. In the MBOA MAC specification, the medium can be bypassed through the "Distributed Reservation Protocol" (DRP). This protocol comprises two mechanisms for negotiating a channel time reservation: an explicit negotiation by means of tables or dedicated command structures, and an implicit negotiation by means of the inclusion of information elements (IEs) of the DRP in the radio beacon of the sender and of the receiver. In both cases, once the reservation is established, the reservation information is included in the radio beacon of the issuer as well as the receiver (s) in each super structure, in which the reservation is still active. This is necessary in order to inform the surrounding devices of the sender and receiver (s) about the existing reservation. These surrounding devices must store the information received from the reservation and abstain from accessing the medium during the reserved period of time. .._ The reservations of the DRP can be reservations of unicast or multicast between two groups of devices, respectively. Thus, there is a need for a UWB MAC system and method for reserving wireless channel resources so that connected devices 102 can send data to host 101. The present invention is based on distributed MBOA UWB MAC using the distributed protocol * Reservation (DRP) for the exchange of isochronous and asynchronous data. That is, the present invention relates to the transfer of data between the connected devices 102 and the host 101 that use the DRP protocol. The present invention provides a system and method that incorporates DRP-based host-device communication into a wireless USB (WUSB).

In a first embodiment, the host 101 uses a multicast DRP (Distributed Reservation Protocol) structure in favor of the connected devices 102 to reserve wireless channel resources for the transfer of data between the host 101 and the connected devices 102 based on the characteristics of the connected device and what traffic they have. In the second mode, the host 101 sends a unicast DRP structure to a connected device 102 and negotiates the use of the channel resources for the transfer of data between the connected device 102 and the host 101. In a third mode, the host 101 sends a selective call structure or frame to a connected device 102 to activate transmission from the device 102. Thus, the present invention is a system and method for a distributed MAC protocol that provides a solution by incorporating the transfer of WUSB data in it.

Brief Description of the Figures Other features and advantages of the present invention will be obvious from the following drawings and the detailed description of the invention.

Figure 1 illustrates a common WUSB architecture having the bicycle hub-and-spoke shape; Figure 2 illustrates a micro-planned DRP reservation according to the standard of the WUSB Working Group; Figure 3a illustrates an architecture of a host according to the present invention; Figure 3b illustrates an architecture of a connected device according to the present invention; Y Figure 4 illustrates a finite state diagram (FSD) for the host data transfer processing. Detailed Description of the Invention It is understood by persons of ordinary skill in the art that the following descriptions are provided for purposes of illustration and not as limitation. The skilled person understands that there are many variations that fall within the spirit of the invention and the scope of the appended claims. The unnecessary detail of known functions and operations could be omitted from the current description so as not to obscure the present invention. The present invention provides a system and method for incorporating host-device communication into a wireless USB (WUSB). Next, with reference to Figure 1, in a WUSB scenario, there is a host 101 and one or more connected devices 102 that transmit the data to the host 101. In the scenario of Wired USB, the host sends an encoded electrical signal or a selective call structure to the devices to request the data from them. The WUSB could use a MACOA MBOA UWB as a means to communicate with other devices through the wireless medium. The MBOA UWB MAC is distributed and the present invention provides a system and method by which the host 101 can reserve channel resources in favor of the connected devices 102, so that the connected devices 102 can transmit the data when required by the host. That is, the present invention is a system and method that reserves wireless channel resources, so that connected devices 102 can send data to host 101. In a first mode, a host 101 of a WUSB initiates a DRP multicast structure for reserve wireless channel resources with / in favor of at least one WUSB 102 device connected to it. Each at least one device 102 that is connected to the host 101 communicates to the device 102 the characteristics to the host 101 that are used by the host 101 to reserve the wireless channel capability in favor of at least one device 102. An advantage of this mode is that the reservation header is very low, because the multicast reservation is made for multiple devices. further, a reservation combined by the host would cause only a contiguous period of time for the host 101 to receive the data from at least one device 102. In this first mode, the adjacent time period is programmed for at least one device using the protocol that is called micro-planning protocol. The micro-planning protocol is defined in the document "WUSB Key Developers, USB-IF, WUSB Micro -Scheduling Specification, Revision 0.5c, December 2003", which is incorporated herein by reference in its entirety and is illustrated in Figure 2. The micro-planning protocol adds an efficient and extensible medium distribution mechanism for applications that require lower latency or wait time and finer control of bandwidth growth. According to the micro-planning, the host redistributes the channel time within a DRP reservation based on an intra-superstructure. This allows the devices to quickly and efficiently change the amount of time of the distributed channel to other devices that are informed and that have permission to use the DRP reservation. The group that uses the micro-planning protocol is called a micro-planned grouping. The device within the cluster that distributes the. The use of the medium within the micro-planned DRP reservation is called the Micro-Planned Grouping Controller (MSCC). In this way, the multicast DRP protocol of the present invention is a form that incorporates in an UWB MAC the existing scheme of the micro-planning protocol of the WUSB specification. The disadvantage of this scheme is that host 101 must make another multicast reservation or must make a unicast reservation for those devices 102 that were not in accordance with the initial multicast reservation. In a second mode, the host 101 initiates a separate unicast DRP reservation at least for a device 102 in order to reserve the channel resources. In this second embodiment, the number of frames or reservation structures that need to be sent over the channel is directly proportional between the number of devices 102 connected to the host 101. This reservation initiation is equivalent to the micro-planned operation command (MCC) of the current WUSB specification. Once the reservation is made, the host 101 uses a selective call structure which requires that at least one device 102 transmits the data during the reserved period. The advantages of the second modality include that: (1) this is a natural extension of DRP and (2) WUSB devices can be very simple. However, a higher DRP negotiation header is incurred (depending on the number of WUSB devices). And, because DRP reservations could be extended through a super structure, this second modality could be less efficient than the micro-planning protocol used by the first modality. In a third embodiment, for WUSB transmissions that do not require DRP, the selective call structure could also be sent by host 101 using the EDCA channel access, which has control of the medium for a time specified by the EDCA TXOP limit. , to require that at least one device transmit the data. The third modality has the advantage of flexibility and does not require devices to support and implement DRP mechanisms. However, EDCA is an access based on containment and there are no guarantees against delays. For each mode, host 101 must know the capabilities of at least one device 102. These capabilities are. included at least through a device 102 when at least the device 102 transmits to a beacon. Host 101 also includes host 101 capabilities in a beacon. In each modality, the devices 102 announce whether the traffic is pending towards the host WUSB 101. In each mode, the notification of the WUSB device traffic can use a reservation-DRP or the notification of the device traffic can be sent using EDCA or using some signaling in radio beacon structures. The discovery of the host WUSB is effected by means of a radio beacon in which the host includes its capabilities. In order to achieve a better package and facilitate implementation, the Displacement and Duration fields of a DRP reservation are preferably set to a multiple of "X", where X is selected based on the combination of the desired resolution of the DRP reservation and the size of the DRP slot. Normally, X = 625 useg. Next, with reference to Figure 1, a common WUSB network employs an architecture having a bicycle bushing-and-spoke shape, which has a host 101 as the bushing and at least one connected device 102 as the bushing ray. bicycle. A common host WUSB 101, according to the present invention, could include a host MAC module 300 with an architecture that is illustrated in the block diagram of Figure 3a. A host 101 could include a host MAC module 300 having a controller 301 connected, operatively, with at least one transmitter 302, a host data transfer processing component 303 comprising a host DRP processing module 303a and a host device notification processing module 303b according to the present invention, and a receiver 304. The transmitter 302 and the receiver 304 are operatively connected to an antenna 305. The host DRP processing component 303a provides adaptive programming so that, for example, at least one of the multicast and unicast DRP processing is achieved by the host. 101 for each • connected device 102. Un. connected common device WUSB 102 could optionally include a more limited version of the host MAC module 300 as the device MAC module 350 with an architecture that is illustrated in the block diagram of Figure 3b. Each connected device 102 could include a device MAC module 350 having a controller 352 operatively connected to at least one transmitter 302, a device processing component 353 comprising a device DRP processing module 353a and a module of notification processing of the device 353b according to the present invention, and a receiver 304. The transmitter 302 and the receiver 304 are operatively connected to an antenna 305. The DRP processing component of the device 353a provides an adaptive programming so that for example, at least one of a multicast and unicast DRP processing is achieved by the device 102 in response to the reservations made by the host 101 and so that the connected device 102 also accepts or rejects a reservation made in its name by the host 101. Also, if a connected device had additional capabilities In order to act as a host by itself, there would be an optional sub-component of device / host (not shown), of each of the modules: 353a-b. Next, with reference to Figure 4, a finite state diagram (FSD) illustrates the host data transfer processing 303 including the DRP reservation functionality of the host DRP processing component 303a. Once the WUSB host is initialized at 401, it starts issuing signals 402 following the rules specified in the MAC MBOA. The beacon includes the WUSB host capabilities, so that the WUSB devices can find the WUSB host by means of a regular reception of the MAC beacon. Once the WUSB devices are initialized, the devices follow the signaling rules of the MAC MBOA, and look for the radio beacon from the host (s) WUSB. The WUSB would wait to receive notification of device traffic (DNT) through EDCA if DRP was not supported at 403, or through EDCA or DRP if DRP was supported at 405. Following operation EDCA 403, once that the DNT traffic is received through EDCA, the host WUSB uses the EDCA mechanisms to have 'access to the medium and to selectively call the WUSB devices 406 according to a third embodiment of this invention. It should be noted that the DNT traffic could be received through EDCA 403 even though the WUSB host supports the DRP. If the DNT traffic was received and DRP was supported, the WUSB host would initiate the DRP 405 data negotiation process. - If the host and WUSB devices support the multicast DRP, the WUSB host would include a DRP multicast reservation on the radio beacon. 408. The devices could adopt the reservation and include it in their own radio beacons. If all devices adopt the multicast reservation, the WUSB host would initiate the micro-planning operation. If some devices do not adopt the multicast reservation, due for example to having a conflict with a surrounding reservation, the host WUSB could initiate a second WUSB multicast reservation or a unicast reservation with the devices 411. In a first embodiment of the invention, the WUSB devices support at least the implicit reservation mechanism DRP. This requires that the devices listen to the beacons of other devices and store the occupation of all the data slots during the super structure. This allows the devices to reject, eventually, the multicast reservation request of the WUSB host and to eventually propose an alternative reservation time. In a second embodiment of the invention, the WUSB devices do not need to support the full DRP functionality and only copy the reservation information element DRP from the radio beacon of the host WUSB into their own beacon. - _ 'If the host or the WUSB devices would not support the micro-planning during the DRP multicast reservations, the WUSB host would initiate a 407 unicast DRP negotiation and start the WUSB operation using the selective call structures during the DRP 409 reservations. according to another modality. It should be noted that, in order to satisfy the requirements of the devices with different capacities, a combination of all the mechanisms could be carried out in parallel with the WUSB. It is also possible for the WUSB host to use EDCA access to provide traffic or to selectively call connected devices 406, even if a DRP reservation was set to 409, 410. This is useful for scenarios where interference and channel errors exist and where the time during the DRP reservation can not be used. While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the super structure as described in this document is illustrative and various changes and modifications may be made and equivalents may be substituted. for the elements thereof without departing from the true scope of the present invention. In addition, many modifications could be made to adapt the teachings of the present invention to a particular situation without departing from its central scope. Therefore, it is intended that the present invention not be limited to the particular embodiments described as the best mode contemplated for carrying out the present invention, although the present invention includes all modalities that fall within the scope of the appended claims. It is noted that in relation to this date the best method known by the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Claims (45)

1. CLAIMS Having described the invention as above, the content of the following claims is claimed as property: 1. A method for host-device communication in a first WUSB network that includes a host and at least one connected device, characterized in that it comprises the steps of: emitting signals in accordance with a distributed UWB MAC protocol by the host and at least one connected device; receive DNT traffic through the host; and operate the WUSB network through the host according to the capabilities of the connected devices. The method according to claim 1, further characterized in that it comprises, if the distributed reservation were supported, the step of establishing a displacement field and a duration field in the reservation DRP at a multiple of a predetermined value. 3. The method according to claim 2, characterized in that the predetermined value is 625 useg. 4. The method according to claim 1, further characterized in that it comprises at least one connected device that performs one of the steps of: i. use DRP access to indicate traffic; ii. use EDCA to send traffic notification; iii. signal the radio beacons to send the traffic notification. 5. The method according to claim 1, characterized in that the signal-emitting stage further comprises the steps of: including the host capabilities in a host radio. and include in a connected device the radio beacon capabilities of at least one connected device. The method according to claim 1, further characterized in that it comprises the step of at least one connected device discovering the host by means of the host radio beacon. The method according to claim 1, characterized in that the operation step further comprises, if the connected device supports EDCA, that the host performs the steps of: using an EDCA mechanism to access the medium; selectively call at least one connected device to request that at least the connected device transmit data; and receive the data from at least one connected device as a result of the selective call. The method according to claim 7, further characterized in that it comprises at least one connected device that performs one of the steps of: using the DRP access to indicate the traffic; use EDCA to send traffic notification; and signaling on the radio beacons to send traffic notification. The method according to claim 1, characterized in that the operation step further comprises, if the connected device, supports unicast DRP, the step of making a unicast reservation by the host performing the steps of: initiating a unicast DRP reservation at least on a device for reserving channel resources for the transmission of the data to the host at least through a device; selectively call at least one device connected during DRP to require that at least one connected device transmit the data; and receive the data from at least one connected device in the result of the selective call. The method according to claim 9, further characterized in that it comprises at least one connected device that performs one of the steps of: using the DRP access to indicate the traffic; use EDCA to send traffic notification; and "signaling on the beacons to send the traffic notification." 11. The method according to claim 1, characterized in that the operation step further comprises, if the connected device supports the multicast DRP, the stage of making a reservation. multicast by the host which in turn performs the steps of: reserving channel resources in a first DRP reservation by including the multicast DRP in radio beacons to get a first reservation; for each connected device that is not an unaccepted device that does not accept the multicast DRP reservation, start regular DRP negotiation with each device without acceptance to get at least one of a unicast reservation for each device without acceptance and a second DRP reservation; micro-plan the channel resources of the first and second DRP reservations between those devices connected to at least one connected device that accepts the multicast DRP reservation; and receive the data from at least one connected device. The method according to claim 11, further characterized in that it comprises at least one connected device that performs one of the steps of: using the DRP access to indicate the traffic; use EDCA to send traffic notification; and - signaling on the radio beacons to send traffic notification. The method according to claim 12, characterized in that the initiation of the regular DRP negotiation step further comprises the step of performing at least one of the initiation steps of a unicast DRP reservation with a non-accepting device and the initiation of a second multicast DRP reservation with devices without acceptance. The method according to claim 13, further characterized in that it comprises the step of at least one connected device acting as a host in a second WUSB network. The method according to claim 14, characterized in that at least one connected device acting as a host of the second WUSB network performs at least some of the steps performed by the host of the first WUSB network. 16. The method of compliance with the claim 15, further characterized in that it comprises, if the distributed reservation were supported, the step of establishing a displacement field and a duration field in a reservation DRP at a multiple of a predetermined value. 17. The method of compliance with the claim 16, characterized in that the predetermined value is 625 useg. The method according to claim 13, further characterized in that it comprises, if the distributed reservation were supported, the step of establishing a displacement field and a duration field in a reservation DRP at a multiple of a predetermined value. 19. The method according to claim 18, characterized in that the predetermined value is 625 useg. 20. A host apparatus for host-device communication in a first WUSB network that includes the host and at least one connected device, characterized in that it comprises: a transmitter that sends out signal broadcasts, traffic notifications, reservations and media data; a receiver that accepts signal broadcasts, traffic notifications, reservations and data from the medium; a host data transfer processing component that processes the data transferred between the host and at least one connected device; and a controller operatively connected to the transmitter, receiver and host data transfer processing component and which is configured to direct the transmitter, receiver and host data transfer processing component to: - - initiating the emission of signals according to a distributed UWB MAC protocol and announcing host capabilities, - receiving and processing according to the distributed UWB MAC protocol, the signal emissions from at least one connected device including the capabilities of at least one device, - receive and process DNT traffic, and - initiate and control the WUSB operation of the network. The host apparatus according to claim 20, characterized in that the controller is further configured to direct the transmitter, the receiver and the host data transfer processing component to: include the multicast DRP in radio beacons and subsequently initiate the micro-planning operation if the multicast DRP was supported; receive and process the DNT traffic and, if only the Unicast DRP was supported by the connected device, negotiate the unicast DRP with at least one connected device and then start the operation WUSB; and receive and process the DNT traffic, if only the EDCA was supported by the connected device, start the WUSB operation with a selective call structure using the EDCA. 22. The host apparatus according to claim 20, characterized in that the controller is further configured to direct the data transfer processing component of the device to establish a displacement field and a duration field in each DRP reservation in a multiple of a default value if the distributed reservation was supported. 23. The host apparatus according to claim 22, characterized in that the predetermined value is 625 useg. 24. The host apparatus according to claim 20, characterized in that when the connected device only supports the EDCA, the controller is further configured to regulate the operation of the host by directing the receiver, the transmitter and the data transfer processing unit of the host. host to: use an EDCA mechanism to access the medium; selectively call at least one connected device to require that at least one connected device transmit data; and receive data from at least one connected device as a result of the selective call. 25. The host apparatus according to claim 20, characterized in that the connected device supports the unicast DRP, the controller is further configured to regulate the operation of the host by directing the receiver, the transmitter and the host data transfer processing unit to: initiate a unicast DRP reservation at least in a device for reserving channel resources for the transmission of data to the host at least through a connected device; selectively call at least one device connected during the DRP to require that at least one connected device transmit data; and receive data from at least one connected device in the selective call result. 26. The host apparatus according to claim 20, characterized in that at least one connected device supports the multicast DRP and the controller is further configured to regulate the operation of the host by directing the receiver, the transmitter and the data transfer processing unit of the host. host to: reserve resource channels in a first multicast DRP reservation by including a multicast DRP in radio beacons to get a first reservation; for each at least one connected device that is a non-accepting device that does not accept the first multicast DRP reservation, start regular DRP negotiation with each device without acceptance to get at least one of a unicast reservation for each device without acceptance and a second DRP reservation; micro-plan the channel resources of the first and second DRP reservations between devices connected to at least one connected device that accepts the multicast DRP reservation; and receive data from at least one connected device. 27. The host apparatus according to claim 26, characterized in that a regular DRP negotiation comprises at least one of a negotiation of a unicast reservation _ DRP with a non-accepting device and a second multicast DRP reservation for the non-accepting devices. 28. A method for host-device communication - in a WUSB network that includes a host and at least one connected device, characterized in that it comprises the steps of: emitting signals according to a distributed UWB MAC protocol by the host and at least one connected device; the host that establishes a multicast reservation between the host and at least one connected device; and execute a WUSB protocol within the multicast reservation. The method according to claim 28, characterized in that each of the set-up and execution steps further comprises the steps of reserving channel resources by including a multicast reservation information element in radio beacons to achieve a first reservation; micro-plan the channel resources of the multicast reservation between the devices connected at least the connected device that accepted the multicast reservation; and receive data from at least one connected device. 30. The method of compliance with the claim 29, characterized in that the reservation stage further comprises the steps of: initiating a unicast reservation with a device without acceptance; and initiating a second multicast reservation with a plurality of devices without acceptance. 31. The method according to claim 28, further characterized in that it comprises the step of establishing a displacement field and a duration field in a reservation at a multiple of a predetermined value. 32. The method of compliance with the claim 30, characterized in that the predetermined value is 625 useg. 33. The method according to claim 28, further characterized in that it comprises at least one connected device that performs one of the steps of: using the DRP access to indicate the traffic; use EDCA to send traffic notification; and signaling on the radio beacons to send traffic notification. 34. The method according to claim 33, characterized in that the signal emission stage further comprises the stage of inclusion in a host radio beacon, the capabilities of the host and in a radio beacon of connected device, the capabilities of at least one connected device . 35. The method of compliance with the claim 33, further characterized in that it comprises the step of at least one connected device discovering the host by means of the host radio beacon. 36. A method for host-device communication in a WUSB network that includes a host and at least one connected device, characterized in that it comprises the steps of: emitting signals according to a distributed UWB MAC protocol by the host and at least a connected device; establish unicast reservations between the host and at least one connected device; and execute a WUSB protocol within the unicast reservations. 37. The method according to the claim 36, characterized in that each of the set-up and execution steps further comprises the steps of: the host initiating a unicast reservation at least on a connected device to reserve channel resources for the transmission of data to the host at least by a device connected; the host selectively calling at least one connected device during reservation to require that the connected devices transmit data; and at least one connected device that transmits data to the host as a result of the selective call. 38. The method according to claim 36, further characterized in that it comprises at least one connected device that performs one of the steps of: using the DRP access to indicate the traffic; use EDCA to send traffic notification; and signaling on the radio beacons to send traffic notification. 39. The method of compliance with the claim 38, characterized in that the signal emission stage further comprises the step of including in a host radio beacon the capabilities of the host and in a radio beacon device connected the capabilities of at least one connected device. 40. The method of compliance with the claim 38, further characterized in that it comprises the step of at least one connected device discovering the host by means of the host radio beacon. 41. A method for host-device communication in a WUSB network that includes a host and at least one connected device, characterized in that it comprises the steps of: the host using an EDCA mechanism to access the medium; the host that selectively calls at least one connected device to require that at least one connected device transmit data; and the host that receives data from at least one connected device as a result of the selective call. 42. The method according to claim 41, characterized in that the host and "at least one connected device perform the signal emission step according to a distributed UWB MAC protocol 43. The method according to claim 41, further characterized in that it comprises the step at least in that a connected device performs one of the steps of: using the DRP access to indicate the traffic; use EDCA to send traffic notification; and signaling on the radio beacons to send traffic notification. 44. The method of compliance with the claim 43, characterized in that the signal emission stage further comprises the stage of inclusion in a host radio beacon of the capabilities of the host and in a radio beacon of connected device, the capabilities of at least one connected device. 45. The method according to claim 43, further characterized in that it comprises the step of at least one connected device discovering the host by means of the host radio beacon.