# US 10,484,888 B2 · Telecommunications apparatus and methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,484,888 B2 - Document ID: US10484888B2 - Status: Granted - Kind: B2 - Application number: 15/548,429 - Filed: 2015-12-21 - Published: 2018-01-18 - Granted: 2019-11-19 - Earliest claimed: 2015-02-12 - Assignees: Sony Corporation - Applicants: Sony Corporation - Inventors: Brian Alexander Martin; Martin Warwick Beale; Basuki Priyanto - Web page: https://patentgrep.com/patent/US10484888B2 ## CPC - H04W 24/02: Arrangements for optimising operational condition - H04B 17/328: {Reference signal received power [RSRP]; Reference signal received quality [RSRQ]} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - 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) - H04B: TRANSMISSION ## Abstract A method of operating a terminal device capable of coverage enhancement in a wireless telecommunication system including receiving a signal from a base station within the wireless telecommunication system, measuring the received signal strength of the received signal, comparing the measured signal strength with at least one threshold value, and selecting a mode of operation of coverage enhancement based on a result of the comparison. ## Claims ### Claim 1 A method of operating a terminal device capable of coverage enhancement in a wireless telecommunication system comprising: receiving a signal from a base station within the wireless telecommunication system; measuring a signal strength of the received signal; comparing the measured signal strength with a first threshold value; selecting a first mode of coverage enhancement as a selected mode of coverage enhancement when the measured signal strength is greater than the first threshold value; not selecting the first mode of coverage enhancement as the selected mode of coverage enhancement and comparing the measured signal strength with a second threshold value when the measured signal strength is less than the first threshold value; and selecting a second mode of coverage enhancement as the selected mode of coverage enhancement when the measured signal strength is greater than the second threshold value, wherein in the first mode of coverage enhancement transmission of a system information block (SIB) for the terminal device is repeated a first number of times, in the second mode of coverage enhancement transmission of a SIB for the terminal device is repeated a second number of times, which is greater than the first number of times, the terminal device is a reduced-capability terminal device configured to operate in a subset of an entirety of a bandwidth of the wireless telecommunication system, the SIB is a SIBx a specifically configured for reception by reduced-capability terminals, and existence of the SIBx is identified by an information element included in a SIB previously received by the terminal device. ### Claim 2 (depends on 1) The method according to claim 1, wherein the received signal comprises system information which indicates the first and second threshold values. ### Claim 3 (depends on 1) The method according to claim 1, wherein the first and second threshold values relate to the minimum level of power supported by the base station at the first and second modes of coverage enhancement, respectively. ### Claim 4 (depends on 1) The method according to claim 1, further comprising: receiving system information associated with the selected mode of operation of coverage enhancement. ### Claim 5 (depends on 1) The method according to claim 1, further comprising: transmitting to the wireless telecommunication system the selected mode of coverage enhancement. ### Claim 6 (depends on 5) The method according to claim 5, wherein the selected mode is transmitted in the physical random access channel. ### Claim 7 (depends on 1) The method according to claim 1, wherein when operating in the selected mode of operation, in the event that the system information associated with the selected mode of operation is not received, the method comprises: selecting a different mode of coverage enhancement. ### Claim 8 A terminal device capable of coverage enhancement for use in a wireless telecommunication system wherein the terminal device comprises: circuitry configured to receive a signal from a base station within the wireless telecommunication system; measure a signal strength of the received signal; compare the measured signal strength with a first threshold value; select a first mode of coverage enhancement as a selected mode of coverage enhancement when the measured signal strength is greater than the first threshold value; not select the first mode of coverage enhancement as the selected mode of coverage enhancement and compare the measured signal strength with a second threshold value when the measured signal strength is less than the first threshold value; and select a second mode of coverage enhancement as the selected mode of coverage enhancement when the measured signal strength is greater than the second threshold value, wherein in the first mode of coverage enhancement transmission of a system information block (SIB) for the terminal device is repeated a first number of times, in the second mode of coverage enhancement transmission of a SIB for the terminal device is repeated a second number of times, which is greater than the first number of times, the terminal device is a reduced-capability terminal device configured to operate in a subset of an entirety of a bandwidth of the wireless telecommunication system, the SIB is a SIBx a specifically configured for reception by reduced-capability terminals, and existence of the SIBx is identified by an information element included in a SIB previously received by the terminal device. ### Claim 9 (depends on 8) The terminal device according to claim 8, wherein the received signal comprises system information which indicates the first and second threshold values. ### Claim 10 (depends on 8) The terminal device according to claim 8, wherein the first and second threshold values relate to the minimum level of power supported by the base station at the first and second modes of coverage enhancement, respectively. ### Claim 11 (depends on 8) The terminal device according to claim 8, wherein the circuitry is configured to receive system information associated with the selected mode of operation of coverage enhancement. ### Claim 12 (depends on 8) The terminal device according to claim 8, wherein the circuitry is configured to transmit to the wireless telecommunication system the selected mode of coverage enhancement. ### Claim 13 (depends on 12) The terminal device according to claim 12, wherein the selected mode is transmitted in the physical random access channel. ### Claim 14 (depends on 8) The terminal device according to claim 8, wherein when operating in the selected mode of operation, in the event that the system information associated with the selected mode of operation is not received, the circuitry is configured to select a different mode of coverage enhancement. ### Claim 15 (depends on 8) The terminal device according to claim 8, wherein the first mode of coverage enhancement is a 3 dB coverage enhancement mode; and the second mode of coverage enhancement is a 15 dB coverage enhancement mode.