# US 10,375,568 B2 · Communication method in vehicular wireless communication system and vehicular wireless communication system for transmission of necessary information only from a sensor to the network > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,375,568 B2 - Document ID: US10375568B2 - Status: Granted - Kind: B2 - Application number: 15/326,869 - Filed: 2015-07-15 - Published: 2017-07-27 - Granted: 2019-08-06 - Earliest claimed: 2014-07-18 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Ryokichi Onishi; Makiko Matsumoto - Web page: https://patentgrep.com/patent/US10375568B2 ## CPC - H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC] - H04B 1/3822: specially adapted for use in vehicles (H04B1/3827 takes precedence) - H04W 4/44: for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H] - H04W 4/46: for vehicle-to-vehicle communication [V2V] - H04W 8/20: Transfer of user or subscriber data - H04W 12/04: Key management, e.g. using generic bootstrapping architecture [GBA] - 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 - H04W 84/12: WLAN [Wireless Local Area Networks] - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract In a communication method in a wireless communication system configured from a wireless connection providing apparatus (a wireless LAN access point) and a wireless communication apparatus (a wireless LAN client), the wireless connection providing apparatus acquires subscription information for specifying necessary information and includes the subscription information in a control frame notifying surroundings of presence of itself and then transmits the subscription information. The wireless communication apparatus receives the control frame, determines whether the wireless communication apparatus retains information which is specified as being necessary by the subscription information included in the control frame. When the wireless communication apparatus retains the information, the wireless communication apparatus establishes connection to the wireless connection providing apparatus and transmits the information. The subscription information can be stored in an ESSID of a beacon frame, for example. ## Claims ### Claim 1 A communication method in a wireless communication system configured from a wireless connection providing apparatus that provides wireless connection and a wireless communication apparatus capable of performing wireless communication with the wireless connection providing apparatus, the communication method comprising: acquiring, by the wireless connection providing apparatus, subscription information for specifying necessary information; generating, by the wireless connection providing apparatus, a control frame configured to notify surroundings of a presence of the wireless connection providing apparatus, the control frame including the subscription information having a plurality of attribute information including at least one of: (i) a producer of the necessary information, (ii) a generation place of the necessary information, and (iii) a generation time of the necessary information; transmitting, by the wireless connection providing apparatus, the control frame; receiving, by the wireless communication apparatus, the control frame; determining, by the wireless communication apparatus, whether the wireless communication apparatus retains information, which is specified as being necessary by the subscription information included in the control frame; and establishing, by the wireless communication apparatus, connection to the wireless connection providing apparatus, and transmitting the information, in response to a determination that the wireless communication apparatus retains the information. ### Claim 2 (depends on 1) The communication method according to claim 1, wherein a wireless communication system of communication between the wireless connection providing apparatus and the wireless communication apparatus is a wireless LAN, and including the subscription information in the control frame comprises including the subscription information in an ESSID of a beacon. ### Claim 3 (depends on 1) The communication method according to claim 1, wherein the connection between the wireless connection providing apparatus and the wireless communication apparatus is established by a procedure conforming to a Hotspot 2.0 standard, and including the subscription information in the control frame comprises including the subscription information in an Operator Friendly Name in an ANQP Response. ### Claim 4 (depends on 1) The communication method according to claim 1, wherein acquiring the subscription information comprises receiving the subscription information from a database server, and wherein the communication method further comprises transmitting, by the wireless connection providing apparatus, the information, which is transmitted from the wireless communication apparatus, to the database server. ### Claim 5 (depends on 4) The communication method according to claim 4, further comprising accumulating, by the wireless connection providing apparatus, the information transmitted from the wireless communication apparatus and collectively transmitting the information to the database server at predetermined timing. ### Claim 6 (depends on 1) The communication method according to claim 1, wherein the wireless communication apparatus has a function of providing wireless connection, and including, the wireless communication apparatus, the subscription information, which is included in the received control frame, in a control frame of the wireless connection provided by the wireless communication apparatus; transmitting, by the wireless communication apparatus, the subscription information, receiving, by the wireless communication apparatus, the information needed by the subscription information from a second wireless communication apparatus; and transmitting, by the wireless communication apparatus, the information to the wireless connection providing apparatus. ### Claim 7 (depends on 1) The communication method according to claim 1, wherein attribute information representing an attribute of at least one of necessary information and unnecessary information is included in the subscription information. ### Claim 8 (depends on 7) The communication method according to claim 7, wherein the attribute information is included as a hash value in the subscription information. ### Claim 9 (depends on 7) The communication method according to claim 7, wherein an OR of hash values of a plurality of kinds of attribute information is included in the subscription information. ### Claim 10 (depends on 1) The communication method according to claim 1, wherein acquiring the subscription information comprises acquiring a plurality of kinds of subscription information different from one another, and including the subscription information in the control frame comprises changing the subscription information included in the control frame. ### Claim 11 (depends on 1) The communication method according to claim 1, wherein a public key of an information request source is included in the subscription information, and transmitting the information comprises encrypting the information in use of the public key included in the subscription information. ### Claim 12 A wireless communication system comprising: a wireless connection providing apparatus that provides wireless connection, the wireless connection providing apparatus including a processor configured to: acquire subscription information for specifying necessary information; generate a control frame configured to notify surroundings of a presence of the wireless connection providing apparatus, the control frame including the subscription information having a plurality of attribute information including at least one of: (i) a producer of the necessary information, (ii) a generation place of the necessary information, and (iii) a generation time of the necessary information; and transmit the control frame, and a wireless communication apparatus capable of performing wireless communication with the wireless connection providing apparatus, the wireless communication apparatus including a processor configured to: receive the control frame; determine whether the wireless communication apparatus retains information, which is specified as being necessary by the subscription information included in the control frame; and establish connection to the wireless connection providing apparatus and then transmitting the information, in response to a determination that the wireless communication apparatus retains the information. ### Claim 13 A wireless communication apparatus configured to communicate with a wireless connection providing apparatus, the wireless communication apparatus comprising: a wireless network interface configured to perform wireless communication with the wireless connection providing apparatus; and a processor configured to: receive, from a wireless connection providing apparatus that provides wireless connection, a control frame notifying a presence of the wireless connection providing apparatus, the control frame including subscription information having a plurality of attribute information including at least one of: (i) a producer of the necessary information, (ii) a generation place of the necessary information, and (iii) a generation time of the necessary information; determine whether the wireless communication apparatus retains information, which is specified as being necessary by the subscription information included in the control frame; and establish connection to the wireless connection providing apparatus and then transmit the subscription information, in response to a determination that the apparatus itself retains the information.