# US 11,122,406 B2 · Bulk RACH machine type communication (MTC) transmissions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,122,406 B2 - Document ID: US11122406B2 - Status: Granted - Kind: B2 - Application number: 16/486,424 - Filed: 2018-02-27 - Published: 2020-01-30 - Granted: 2021-09-14 - Earliest claimed: 2017-03-10 - Assignees: KYOCERA Corporation - Applicants: Kyocera Corporation; Amit Kalhan - Inventors: Amit Kalhan - Web page: https://patentgrep.com/patent/US11122406B2 ## CPC - H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC] - H04W 88/04: adapted for relaying to or from another terminal or user - H04L 67/566: Grouping or aggregating service requests, e.g. for unified processing - H04W 4/021: Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W 76/11: Allocation or use of connection identifiers - H04W 84/047: {using dedicated repeater stations} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract An intermediate station receives device Random Access Channel (RACH) transmissions from a plurality of machine type communication (MTC) devices and transmits at a bulk RACH transmission to a base station where the bulk RACH transmission represents the RACH transmissions from at least two of the device RACH transmissions. ## Claims ### Claim 1 An intermediate station comprising: a receiver configured to receive a first machine type communication (MTC) Random Access Channel (RACH) transmission from a first MTC device and to receive a second MTC RACH transmission from a second MTC device; a transmitter configured to transmit a bulk RACH transmission to a base station, the bulk RACH transmission representing the first MTC RACH transmission and the second MTC RACH transmission, wherein the bulk RACH transmission has a cyclically shifted Zadoff-Chu sequence indicating the bulk RACH transmission has been transmitted by a RACH aggregator and represents a plurality of RACHs from multiple MTC devices. ### Claim 2 (depends on 1) The intermediate station of claim 1, wherein the bulk RACH transmission indicates a number of MTC devices transmitting a RACH to the intermediate station. ### Claim 3 (depends on 2) The intermediate station of claim 2, wherein the intermediate station is configured to apply a Look-Up-Table (LUT) to select a sequence for the bulk RACH transmission from a plurality of sequences, each of the plurality associated with a number of MTC devices submitting a RACH. ### Claim 4 (depends on 1) The intermediate station of claim 1, wherein the bulk RACH transmission indicates a first identity of the first MTC device and a second identity of the second MTC device. ### Claim 5 (depends on 4) The intermediate station of claim 4, wherein a sequence of the bulk RACH transmission indicates the first identity and the second identity. ### Claim 6 (depends on 1) The intermediate station of claim 1, wherein the intermediate station receives RACH transmissions only from MTC devices within a local geographical area smaller than a base station service area of the base station and within the base station service area. ### Claim 7 (depends on 1) The intermediate station of claim 1, wherein, the first MTC RACH transmission has a first sequence, the second MTC RACH transmission has a second sequence, and the bulk RACH transmission has a third sequence representing the first sequence and the second sequence. ### Claim 8 (depends on 1) The intermediate station of claim 1, wherein the intermediate station is configured to: receive MTC RACH transmissions from MTC devices through a MTC RACH channel having a first carrier frequency and a first channel repeating transmission time; and transmit the bulk RACH transmissions to the base station through a bulk RACH channel having a second carrier frequency and a second channel repeating transmission time. ### Claim 9 (depends on 8) The intermediate station of claim 8, wherein the first channel repeating transmission time has a first channel time period and the second channel repeating transmission time has a second channel time period different from the first channel time period. ### Claim 10 (depends on 9) The intermediate station of claim 9, wherein at least one of the first channel time period and the second channel time period is dynamically adjusted. ### Claim 11 (depends on 1) The intermediate station of claim 1, wherein the receiver and the transmitter operate in accordance with at least one revision of The Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) communication specification. ### Claim 12 A wireless communication system comprising: a first intermediate station comprising: a first receiver configured to receive a first machine type communication (MTC) Random Access Channel (RACH) transmission from a first MTC device and to receive a second MTC RACH transmission from a second MTC device, the first MTC device and the second MTC device within a first intermediate station geographical service area; and a first transmitter configured to transmit a first bulk RACH transmission to a base station, the first bulk RACH transmission representing the first MTC RACH transmission and the second MTC RACH transmission, wherein the first bulk RACH transmission has a first cyclically shifted Zadoff-Chu sequence indicating the first bulk RACH transmission has been transmitted by a RACH aggregator and represents a plurality of RACHs from multiple MTC devices; and a second intermediate station comprising: a second receiver configured to receive a third MTC RACH transmission from a third MTC device and to receive a fourth MTC RACH transmission from a fourth MTC device, the third MTC device and the fourth MTC device within a second intermediate station geographical service area; and a second transmitter configured to transmit a second bulk RACH transmission to the base station, the second bulk RACH transmission representing the third MTC RACH transmission and the fourth MTC RACH transmission, wherein the second bulk RACH transmission has a second cyclically shifted Zadoff-Chu sequence indicating the second bulk RACH transmission has been transmitted by a RACH aggregator and represents a plurality of RACHs from multiple MTC devices, the same communication resources assigned for MTC RACH transmission within the first intermediate station geographical service area and the second intermediate station geographical service area. ### Claim 13 (depends on 12) The system of claim 12, wherein at least one preamble assigned for MTC RACH transmission in the first intermediate station geographical service area is assigned for MTC RACH transmission in the second intermediate station geographical service area. ### Claim 14 A method comprising: receiving a first machine type communication (MTC) Random Access Channel (RACH) transmission from a first MTC device within an intermediate station geographical service area; receiving a second MTC RACH transmission from a second MTC device within the intermediate station geographical service area; and transmitting, to a base station, a bulk RACH transmission representing the first MTC RACH transmission and the second MTC RACH transmission, wherein the bulk RACH transmission has a cyclically shifted Zadoff-Chu sequence indicating the bulk RACH transmission has been transmitted by a RACH aggregator and represents a plurality of RACHs from multiple MTC devices. ### Claim 15 (depends on 14) The method of claim 14, wherein the bulk RACH transmission indicates a number of MTC devices transmitting a RACH to the intermediate station. ### Claim 16 (depends on 14) The method of claim 14, wherein the bulk RACH transmission indicates a first identity of the first MTC device and a second identity of the second MTC device.