# US 2014/0152423 A1 · Unit for communication by means of a predetermined protocol > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0152423 A1 - Document ID: US20140152423A1 - Status: Published application - Kind: A1 - Application number: 14/115,635 - Filed: 2012-05-04 - Published: 2014-06-05 - Earliest claimed: 2011-05-05 - Assignees: Valeo Securite Habitacle - Inventors: Laurent Petel; Eric Menard - Web page: https://patentgrep.com/patent/US20140152423A1 ## CPC - G07C 9/00309: {operated with bidirectional data transmission between data carrier and locks} - H04B 5/70: specially adapted for specific purposes - H04L 67/12: specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks - H04L 67/125: involving control of end-device applications over a network - H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication - H04W 52/0229: {where the received signal is a wanted signal} - H04L 69/28: Timers or timing mechanisms used in protocols - H04M 1/72412: using two-way short-range wireless interfaces - H04M 1/72415: for remote control of appliances - H04M 2250/02: including a Bluetooth® interface - H04M 2250/04: including near field communication means, e.g. RFID - H04W 84/20: Leader-follower arrangements - Y02D 30/70: in wireless communication networks - G07C: TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract The invention relates to a unit (SYST) for communication by means of a predetermined protocol, said communication unit (SYST) including: a master device (EQ_MAI); and a slave device (EQU_ESC) capable of communicating with a vehicle according to a UHF or BF protocol, and capable of assuming a plurality of states, characterized in that the master device (EQ_MAI) is suitable for sending, to the slave device (EQU_ESC), alerts pertaining to the actuation of a state. ## Claims ### Claim 1 A communication unit (SYST) based on a determined protocol, said communication unit (SYST) comprising: a master entity (ENT_MAS); a slave entity (ENT_SLV) able to communicate with a vehicle according to a UHF or LF protocol, and able to take several states; wherein the master entity (ENT_MAS) is adapted for dispatching alarms for activating at least one state to the slave entity (ENT_SLV). ### Claim 2 (depends on 1) The communication unit (SYST) as claimed in claim 1, wherein the master entity (ENT_MAS) and the slave entity (ENT_SLV) are able to communicate by bluetooth protocol or by bluetooth low energy (BLE) protocol. ### Claim 3 (depends on 2) The communication unit (SYST) as claimed in claim 2, wherein the slave entity (ENT_SLV) is able to take the following states: idle, in which the slave entity (ENT_SLV) neither receives nor emits signals, and is not connected to any entity; discoverable, in which the slave entity (ENT_SLV) periodically emits presence signals (sig_pres); connected, in which the slave entity (ENT_SLV) is connected to the master entity (ENT_MAS); listening mode, in which the slave entity (ENT_SLV) is able to receive signals from the vehicle by UHF or LF protocol; wherein the states activated by the activation alarms are the idle state, the discoverable state, and the listening mode state. ### Claim 4 (depends on 3) The communication unit (SYST) as claimed in claim 3, wherein, when the slave entity (ENT_SLV) is in the connected state, the master entity (ENT_MAS) is able to dispatch to it a duration cue whose value corresponds to the duration of activation of said state of the slave entity (ENT_SLV). ### Claim 5 (depends on 3) The communication unit (SYST) as claimed in claim 3, wherein, when the slave entity (ENT_SLV) is in the connected state, the master entity (ENT_MAS) is able to dispatch alarms to it for deactivating said state of the slave entity (ENT_SLV). ### Claim 6 (depends on 3) The communication unit (SYST) as claimed in claim 3, wherein the slave entity (ENT_SLV) comprises an inertial wakeup device able to switch the slave entity (ENT_SLV) from the idle state to the discoverable state. ### Claim 7 (depends on 1) The communication unit (SYST) as claimed in claim 1, wherein the master entity (ENT_MAS) and the slave entity (ENT_SLV) are able to communicate by NFC protocol. ### Claim 8 (depends on 7) The communication unit as claimed in claim 7, wherein the state activated by the activation alarms is a listening mode state in which the slave entity (ENT_SLV) is able to receive signals from the vehicle by UHF or LF protocol. ### Claim 9 (depends on 7) The communication unit as claimed in claim 7, wherein the master entity (ENT_MAS) is able to dispatch to the slave entity (ENT_SLV) a duration cue whose value corresponds to the duration for which the slave entity (ENT_SLV) must remain in the listening mode state. ### Claim 10 (depends on 7) The communication unit (SYST) as claimed in claim 7, wherein, when the slave entity (ENT_SLV) is in the connected state, the master entity (ENT_MAS) is able to dispatch alarms to it for deactivating the listening mode state. ### Claim 11 (depends on 1) The communication unit (SYST) as claimed in claim 1, wherein the master entity (ENT_MAS) is able to dispatch a cue for clock synchronization (clock_sync) to the slave entity (ENT_SLV). ### Claim 12 (depends on 1) The communication unit (SYST) as claimed in claim 1, wherein the master entity (ENT_MAS) is an intelligent mobile telephone, and the slave entity (ENT_SLV) is a vehicle remote control electronic key. ### Claim 13 (depends on 1) The communication unit (SYST) as claimed in claim 1, wherein the master entity (ENT_MAS) and the slave entity (ENT_SLV) form just a single entity comprising a man machine interface (MMI). ### Claim 14 (depends on 12) The communication unit as claimed in claim 12, wherein the activation alarms are dispatched by means of the man machine interface (MMI).