# US 2014/0192764 A1 · Mobile communications system, infrastructure equipment, mobile communications terminal and method to communicate user data within an uplink random access channel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192764 A1 - Document ID: US20140192764A1 - Status: Published application - Kind: A1 - Application number: 14/239,688 - Filed: 2012-08-09 - Published: 2014-07-10 - Earliest claimed: 2011-08-19 - Assignees: Sca Ipla Holdings Inc. - Inventors: Yuichi Morioka - Web page: https://patentgrep.com/patent/US20140192764A1 ## CPC - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC] - H04W 8/22: Processing or transfer of terminal data, e.g. status or physical capabilities - H04W 8/24: Transfer of terminal data - H04W 72/1268: of uplink data flows - H04W 84/042: {Public Land Mobile systems, e.g. cellular systems} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A mobile communications system for communicating data to/from mobile communications terminals, the system including: one or more base stations configured to provide a radio interface to communicate data with mobile communications terminals; and one or more mobile communications terminals configured to communicate data with the one or more base stations via the radio interface, and wherein a mobile communication terminal is arranged to use an uplink random access channel to transmit random access messages to the one or more base stations. A first mobile communications terminal is configured to communicate user data via the uplink random access channel by transmitting one or more of the random access messages at a selected timing within the uplink random access channel, the timing being selected by the first mobile communications terminal to represent at least part of the user data. ## Claims ### Claim 1 A mobile communications system for communicating data to/from mobile communications terminals, the system comprising: one or more base stations of a mobile communications network are arranged to provide a radio interface to communicate with mobile communications terminals; and one or more mobile communications terminals arranged to communicate with the one or more base stations via the radio interface and wherein a mobile communication terminal is arranged to use an uplink random access channel of the radio interface to transmit random access messages to the one or more base stations, wherein a first of the mobile communications terminals is configured to communicate user data via the uplink random access channel by transmitting one or more of the random access messages at a selected timing within the uplink random access channel, the timing being selected by the first mobile communications terminal to represent at least part of the user data. ### Claim 2 (depends on 1) A mobile communications system according to claim 1, wherein the one or more base stations are arranged to schedule uplink transmission in time-adjacent sub-frames; and the timing of transmitting the one or more random access messages includes selecting a subset of sub-frames within the sub-frames available for transmitting the one or more random access messages to represent at least part of the user data. ### Claim 3 (depends on 1) A mobile communications system according to claim 1, wherein the uplink random access channel is provided with a set of blocks of random access resources for mobile communication terminals to send random access messages via the uplink random access channel; and the first mobile communications device being configured to select the timing comprises the first mobile communications device selecting a subset of the blocks of random access resources from the set of blocks of random access resources to represent at least part of the user data. ### Claim 4 (depends on 1) A mobile communications system according to claim 1, wherein the uplink random access channel is provided with a set of blocks of random access resources for mobile communication terminals to send random access messages via the uplink random access channel; and the first mobile communications terminal being configured to select the timing comprises the first mobile communications terminal selecting a timing to transmit a random access message within one block of random access resources by selecting subset of resources within the one block of random access resources to represent at least part of the user data ### Claim 5 (depends on 1) A mobile communications system according to claim 1, wherein each of the random access messages includes a number from a sub-set of numbers, the number being for use by the first mobile communications terminal in recognising a response to the first mobile communications terminal to each of the random access messages which the first mobile communications terminal has transmitted for identifying that the response is to the each of the random access messages; and the first mobile communications terminal is configured, for at least one of the one or more of the random access messages, to select a number within the sub-set of numbers to represent at least part of the user data. ### Claim 6 (depends on 1) A mobile communications system according to claim 1, wherein the one or more base stations are arranged, upon reception of a random access message, to detect whether user data is communicated via the random access message. ### Claim 7 (depends on 6) A mobile communications system according to claim 6, wherein the one or more base stations are configured, after reception of a capability message including an indication of a capability of the first mobile communications terminal, to detect whether user data is communicated via the random access message at least using a capability indicated in the capability message, wherein the capability message may be sent at least by the first mobile communications terminal or by a central user database. ### Claim 8 (depends on 7) A mobile communications system according to claim 7, wherein the capability indication is at least one of a capability to use a sub-frame timing selection method; a capability to use a block of random access resources timing selection; a capability to use a timing selection within a block of random access resources timing and a capability to use random access number selection, the message optionally indicating that the capability is static or dynamic and optionally including that a time period for the capability. ### Claim 9 (depends on 6) A mobile communications system according to claim 6, wherein the one or more base stations are configured to detect whether user data is communicated via the random access message at least by detecting an indicator in the received random access message. ### Claim 10 (depends on 6) A mobile communications system according to claim 6, wherein the one or more base stations are configured to detect whether user data is communicated via the random access message at least by detecting that the message has been sent in random access resources associated with user data communication via the random access channel, the resources being optionally dedicated to user data communication via the random access channel. ### Claim 11 (depends on 1) A mobile communications system according to claim 1, wherein one or more of the base stations are configured to communicate timing advance information to the first mobile communications terminal, and the first mobile communications terminal is configured to adapt a timing of transmission timing of the random access messages after an initialisation in accordance with the timing advance and the selected time of transmission and thereafter assumes that the timing advance information does not change. ### Claim 12 (depends on 1) A mobile communications system according to claim 1, wherein the system comprises a 3GPP-compliant system ### Claim 13 (depends on 12) A mobile communications system according to claim 12, wherein the system comprises a LTE-compliant system and the one or more base stations comprise at least one e-NodeB. ### Claim 14 (canceled) ### Claim 15 A method of communicating in a mobile communications system using a mobile communications terminal, the mobile communications system comprising one or more base stations of a mobile communications network, the method comprising communicating from the mobile communications terminal via a radio interface provided by the one or more base stations by using an uplink random access channel of the radio interface to transmit random access messages to the one or more base stations, the communicating including transmitting one or more of the random access messages at a selected timing within the uplink random access channel, the timing being selected by the mobile communications terminal to represent at least part of the user data. ### Claim 16 (depends on 15) A method of communicating according to claim 15, the method comprising scheduling uplink transmission in time-adjacent sub-frames by the one or more base stations; wherein the selecting the timing of transmitting the one or more random access messages includes selecting a subset of sub-frames within the sub-frames available for transmitting the one or more random access messages to represent at least part of the user data. ### Claim 17 (depends on 15) A method of communicating according to claim 15, wherein the uplink random access channel is provided with a set of blocks of random access resources for mobile communication terminals to send random access messages via the uplink random access channel; and the selecting the timing of transmission includes selecting a subset of the blocks of random access resources from the set of blocks of random access resources to represent at least part of the user data. ### Claim 18 (depends on 15) A method of communicating according to claim 15, wherein the uplink random access channel is provided with a set of blocks of random access resources for mobile communication terminals to send random access messages via the uplink random access channel; and the selecting the timing of transmission includes selecting a timing to transmit a random access message within one block of random access resources by selecting subset of resources within the one block of random access resources to represent at least part of the user data. ### Claim 19 (depends on 15) A method of communicating according to claim 15, wherein each of the random access messages includes a number from a sub-set of numbers, the number being for use by the first mobile communications terminal in recognising a response to the first mobile communications terminal to each of the random access messages which the first mobile communications terminal has transmitted for identifying that the response is to the each of the random access messages; the method comprising: for at least one of the one or more of the random access messages, selecting a number within the sub-set of numbers to represent at least part of the user data. ### Claim 20 (depends on 15) A method of communicating according to claim 15, the method comprising: upon reception of a random access message, the one or more base stations detecting whether user data is communicated via the random access message. ### Claim 21 (depends on 20) A method of communicating according to claim 20, the method comprising: after reception of a capability message including an indication of a capability of the first mobile communications terminal, the one or more base stations detecting whether user data is communicated via the random access message at least using a capability indicated in the capability message, wherein the capability message may be sent at least by the first mobile communications terminal or by a central user database. ### Claim 22 (depends on 21) A method of communicating according to claim 21, wherein the capability indication is at least one of a capability to use a sub-frame timing selection method; a capability to use a block of random access resources timing selection; a capability to use a timing selection within a block of random access resources timing and a capability to use random access number selection, the message indicating that the capability is static or dynamic and including that a time period for the capability. ### Claim 23 (depends on 20) A method of communicating according to claim 20, the method comprising the one or more base stations detecting whether user data is communicated via the random access message at least by detecting an indicator in the received random access message. ### Claim at position 24 24-26. (canceled) ### Claim 27 A mobile communications network for use in a mobile communications system for communicating data to/from mobile communications terminals, the mobile communications network including one or more base stations arranged to provide a radio interface to communicate with mobile communications terminals, wherein a mobile communication terminal is arranged to use an uplink random access channel of the radio interface to transmit random access messages to the network apparatus; and the mobile communications network is arranged, upon reception of a random access message, to detect whether user data is communicated via the random access message, the user data being at least partially represented by a selected timing for transmitting the random access message. ### Claim 28 An infrastructure equipment for a mobile communications network, the infrastructure equipment being configured to provide a radio interface to communicate with mobile communications terminals, the radio interface providing at least one uplink random access channel, and upon receipt of a random access message communicated by a mobile communication terminal in the uplink random access channel of the radio interface, detecting whether user data is communicated via the random access message, the user data being at least partially represented by a selected timing for transmitting the random access message. ### Claim at position 27 29-30. (canceled)