# US 2013/0157703 A1 · Robust wireless communication system for nodes located in vehicles > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0157703 A1 - Document ID: US20130157703A1 - Status: Published application - Kind: A1 - Application number: 13/551,821 - Filed: 2012-07-18 - Published: 2013-06-20 - Earliest claimed: 2011-09-29 - Assignees: Robert Bosch GmbH - Inventors: Vivek Jain - Web page: https://patentgrep.com/patent/US20130157703A1 ## CPC - H04W 24/00: Supervisory, monitoring or testing arrangements - G01D 21/00: Measuring or testing not otherwise provided for - H04B 7/00: Radio transmission systems, i.e. using radiation field (H04B10/00, H04B15/00 take precedence) - H04L 1/00: Arrangements for detecting or preventing errors in the information received {(correcting synchronisation H04L7/00)} - H04L 1/04: using frequency diversity - H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} - H04W 84/18: Self-organising networks, e.g. ad-hoc networks or sensor networks - H04L 1/0071: {Use of interleaving (interleaving per se H03M13/27)} - H04L 1/20: using signal quality detector - H04W 28/065: {using assembly or disassembly of packets} - H04W 72/00: Local resource management - H04W 72/12: Wireless traffic scheduling - H04W 72/541: using the level of interference - H04W 84/005: {Moving wireless networks} - H04W 88/04: adapted for relaying to or from another terminal or user - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A communication method for a wireless communication network in a vehicle is disclosed where the network includes a plurality of sensor nodes and a receiving node. The method includes wirelessly transmitting first sensor data from a first sensor node and second sensor data from a second sensor node using first and second frequency channels, and receiving the first and second sensor data at the receiving node. The method can include rearranging the order of transmitting sensor data, and aggregating sensor data at the sensor nodes. The method can include testing the quality of the wireless links; and using the links with the best quality whether indirect or direct links. The receiving node can simultaneously receive data from more than one node using different frequencies. The nodes can transmit data in parallel using different frequencies. The network can include helper nodes. The wireless communication network can be designed as a tree. ## Claims ### Claim 1 A wireless communication system for a vehicle, the wireless communication system comprising: a wireless receiving node; a first wireless sensor node for wirelessly transmitting first sensor data on a set of frequency channels to the wireless receiving node, the first wireless sensor node periodically switching frequency channels of the set of frequency channels for wirelessly transmitting to the wireless receiving node; and a second wireless sensor node for wirelessly transmitting second sensor data on the set of frequency channels to the wireless receiving node, the second wireless sensor node periodically switching frequency channels of the set of frequency channels for wirelessly transmitting to the wireless receiving node. ### Claim 2 (depends on 1) The wireless communication system of claim 1, wherein the first wireless sensor node receives the second sensor data wirelessly transmitted by the second wireless sensor node, aggregates the second sensor data with the first sensor data, and wirelessly transmits the second sensor data with the first sensor data to the wireless receiving node. ### Claim 3 (depends on 1) The wireless communication system of claim 1, wherein the set of frequency channels comprises a first frequency channel and a second frequency channel, the first frequency channel being different from the second frequency channel, the first wireless sensor node wirelessly transmitting on the first frequency channel and the second wireless sensor node wirelessly transmitting on the second frequency channel; and wherein the wireless receiving node simultaneously receives the first sensor data wirelessly transmitted by the first wireless sensor node on the first frequency channel and the second sensor data wirelessly transmitted by the second wireless sensor node on the second frequency channel. ### Claim 4 (depends on 1) The wireless communication system of claim 1, wherein the set of frequency channels comprises a first set of frequency channels and a second set of frequency channels, the first set of frequency channels being different from the second set of frequency channels, the first wireless sensor node wirelessly transmitting on the first set of frequency channels and the second wireless sensor node wirelessly transmitting on the second set of frequency channels. ### Claim 5 (depends on 4) The wireless communication system of claim 4, wherein the first wireless sensor node periodically cycles through the first set of frequency channels, and the second wireless sensor node periodically cycles through the second set of frequency channels. ### Claim 6 (depends on 4) The wireless communication system of claim 4, wherein the wireless communication system evaluates transmission quality from the first wireless sensor node to the wireless receiving node on each of the frequency channels of the first set of frequency channels, selects a first frequency channel with the highest transmission quality from the first wireless sensor node to the wireless receiving node, and the first wireless sensor node uses the first frequency channel for transmitting to the wireless receiving node. ### Claim 7 (depends on 6) The wireless communication system of claim 6, wherein the wireless communication system periodically reevaluates transmission quality from the first wireless sensor node to the wireless receiving node on each of the frequency channels of the first set of frequency channels, updates the first frequency channel with the highest reevaluated transmission quality from the first wireless sensor node to the wireless receiving node, and the first wireless sensor node uses the updated first frequency channel for transmitting to the wireless receiving node. ### Claim 8 (depends on 1) The wireless communication system of claim 1, further comprising a third wireless sensor node for wirelessly transmitting third sensor data to the wireless receiving node; and wherein the wireless communication system evaluates transmission quality of wirelessly transmitting third sensor data directly from the third wireless sensor node to the wireless receiving node, evaluates transmission quality of wirelessly transmitting third sensor data from the third wireless sensor node to the wireless receiving node indirectly through the first wireless sensor node, and selects a selected transmission path for wirelessly transmitting third sensor data from the third wireless sensor node to the wireless receiving node; the selected transmission path having the highest transmission quality for wirelessly transmitting third sensor data to the wireless receiving node. ### Claim 9 (depends on 1) The wireless communication system of claim 1, further comprising a third wireless sensor node for wirelessly transmitting third sensor data to the wireless receiving node; and wherein for each individual sensor node of the first, second and third wireless sensor nodes, the wireless communication system evaluates transmission quality of wirelessly transmitting sensor data directly from the individual sensor node to the wireless receiving node, evaluates transmission quality of wirelessly transmitting sensor data indirectly from the individual sensor node to the wireless receiving node through the other wireless sensor nodes, and selects a selected transmission path for wirelessly transmitting sensor data from the individual sensor node to the wireless receiving node; the selected transmission path having the highest transmission quality for wirelessly transmitting sensor data from the individual sensor node to the wireless receiving node. ### Claim 10 (depends on 9) The wireless communication system of claim 9, wherein for each individual sensor node of the first, second and third wireless sensor nodes, the wireless communication system periodically reevaluates transmission quality of wirelessly transmitting sensor data directly from the individual sensor node to the wireless receiving node, reevaluates transmission quality of wirelessly transmitting sensor data indirectly from the individual sensor node to the wireless receiving node through the other wireless sensor nodes, and updates the selected transmission path for wirelessly transmitting sensor data from the individual sensor node to the wireless receiving node; the updated selected transmission path having the highest reevaluated transmission quality for wirelessly transmitting sensor data from the individual sensor node to the wireless receiving node. ### Claim 11 (depends on 1) The wireless communication system of claim 1, further comprising a third wireless sensor node for wirelessly transmitting third sensor data to the wireless receiving node; and wherein the wireless communication system evaluates transmission quality of wirelessly transmitting third sensor data directly from the third wireless sensor node to the wireless receiving node, evaluates transmission quality of wirelessly transmitting third sensor data from the third wireless sensor node to the wireless receiving node indirectly through the first wireless sensor node using each of the frequency channels of the set of frequency channels, evaluates transmission quality of wirelessly transmitting third sensor data from the third wireless sensor node to the wireless receiving node indirectly through the second wireless sensor node using each of the frequency channels of the set of frequency channels, and selects a selected transmission path and frequency channel for wirelessly transmitting third sensor data from the third wireless sensor node to the wireless receiving node; the selected transmission path and frequency channel having the highest transmission quality for wirelessly transmitting third sensor data to the wireless receiving node. ### Claim 12 A wireless communication system for a vehicle, the wireless communication system comprising: a wireless receiving node; a first wireless sensor node for wirelessly transmitting first sensor data to the wireless receiving node; a second wireless sensor node for wirelessly transmitting second sensor data to the wireless receiving node, and a wireless helper node for wirelessly transmitting sensor data from selected wireless sensors to the wireless receiving node; the helper node not sensing sensor data. ### Claim 13 (depends on 12) The wireless communication system of claim 12, wherein the wireless helper node uses a set of frequency channels for wirelessly transmitting sensor data to the wireless receiving node; the wireless helper node periodically switching frequency channels of the set of frequency channels. ### Claim 14 (depends on 13) The wireless communication system of claim 13, wherein the wireless communication system evaluates the transmission quality from the wireless helper node to the wireless receiving node on each of the frequency channels of the set of frequency channels, selects a selected frequency channel with the highest transmission quality, and the wireless helper node uses the selected frequency channel for transmitting sensor data to the wireless receiving node. ### Claim 15 (depends on 14) The wireless communication system of claim 14, wherein for each individual sensor node of the first and second wireless sensor nodes, the wireless communication system evaluates transmission quality of wirelessly transmitting sensor data directly from the individual sensor node to the wireless receiving node, evaluates transmission quality of wirelessly transmitting sensor data indirectly from the individual sensor node to the wireless receiving node through the wireless helper node, and selects a selected transmission path for wirelessly transmitting sensor data from the individual sensor node to the wireless receiving node; the selected transmission path having the highest transmission quality for wirelessly transmitting sensor data from the individual sensor node to the wireless receiving node. ### Claim 16 (depends on 12) The wireless communication system of claim 12, wherein for each individual sensor node of the first and second wireless sensor nodes, the wireless communication system evaluates transmission quality of wirelessly transmitting sensor data directly from the individual sensor node to the wireless receiving node, evaluates transmission quality of wirelessly transmitting sensor data indirectly from the individual sensor node to the wireless receiving node through the wireless helper node, and selects a selected transmission path for wirelessly transmitting sensor data from the individual sensor node to the wireless receiving node; the selected transmission path having the highest transmission quality for wirelessly transmitting sensor data from the individual sensor node to the wireless receiving node. ### Claim 17 A wireless communication system for a vehicle, the wireless communication system comprising: a wireless receiving node; a plurality of wireless sensor nodes for wirelessly transmitting sensor data to the wireless receiving node, each wireless sensor node sensing local sensor data and transmitting the sensed local sensor data; wherein for each individual sensor node of the plurality of wireless sensor nodes, the wireless communication system evaluates transmission quality of wirelessly transmitting sensor data directly from the individual sensor node to the wireless receiving node, evaluates transmission quality of wirelessly transmitting sensor data indirectly from the individual sensor node to the wireless receiving node through one or more of the other sensor nodes of the plurality of wireless sensor nodes, and selects a selected transmission path for wirelessly transmitting sensor data from the individual sensor node to the wireless receiving node; the selected transmission path having the highest transmission quality for wirelessly transmitting sensor data from the individual sensor node to the wireless receiving node. ### Claim 18 (depends on 17) The wireless communication system of claim 17, wherein the plurality of wireless sensor nodes use a set of frequency channels for wirelessly transmitting sensor data; and different wireless sensor nodes transmit sensor data simultaneously on different frequency channels of the set of frequency channels. ### Claim 19 (depends on 18) The wireless communication system of claim 18, wherein for each individual sensor node of the plurality of wireless sensor nodes, the wireless communication system evaluates the transmission quality along the selected transmission path on each of the frequency channels of the set of frequency channels, selects a selected frequency channel with the highest transmission quality, and the individual sensor node uses the selected frequency channel for transmitting sensor data to the wireless receiving node along the selected transmission path. ### Claim 20 (depends on 17) The wireless communication method of claim 17, further comprising a wireless helper node for wirelessly transmitting sensor data from selected wireless sensors of the plurality of wireless sensor nodes to the wireless receiving node; the helper node not sensing sensor data; and wherein in determining the selected transmission path for each individual sensor node of the plurality of wireless sensor nodes, the wireless communication system evaluates transmission quality of wirelessly transmitting sensor data indirectly from the individual sensor node to the wireless receiving node through the wireless helper node, the wireless communication system evaluates transmission quality of wirelessly transmitting sensor data indirectly from the individual sensor node to the wireless receiving node through the wireless helper node and one or more of the other sensor nodes of the plurality of wireless sensor nodes.