# US 2020/0288383 A1 · Method of receiving communications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0288383 A1 - Document ID: US20200288383A1 - Status: Published application - Kind: A1 - Application number: 16/648,219 - Filed: 2018-08-02 - Published: 2020-09-10 - Earliest claimed: 2017-09-22 - Assignees: Arm Limited - Applicants: Arm Limited - Inventors: Raghavendra Magadi RANGAIAH - Web page: https://patentgrep.com/patent/US20200288383A1 ## CPC - H04W 48/16: Discovering, processing access restriction or access information - H04L 5/001: {the frequencies being arranged in component carriers} - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04L 5/0098: {Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands} - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 72/56: based on priority criteria - 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 Aspects of the present disclosure relate to a method in a terminal configured to receive transmissions from a telecommunications network. The method comprises receiving a transmission on an anchor carrier, the transmission including control information. The method comprises receiving, on the anchor carrier, an allocation of a non-anchor carrier for receiving data, wherein the non-anchor carrier has a frequency. The method comprises performing a cell search operation, comprising scanning a plurality of frequencies for a cell of the telecommunications network, and inhibiting the frequency of the non-anchor carrier in the scanning. ## Claims ### Claim 1 A method in a terminal configured to receive transmissions from a telecommunications network, the method comprising: receiving a transmission on an anchor carrier, the transmission including control information; receiving, on the anchor carrier, an allocation of a non-anchor carrier for receiving data, wherein the non-anchor carrier has a frequency; and performing a cell search operation, comprising: scanning a plurality of frequencies for a cell of the telecommunications network; and inhibiting the frequency of the non-anchor carrier in the scanning. ### Claim 2 (depends on 1) A method according to claim 1, wherein: the method comprises adding the frequency of the non-anchor carrier to a non-anchor carrier set; and frequencies of the non-anchor carrier set are inhibited in the scanning. ### Claim 3 (depends on 2) A method according to claim 2, comprising dynamically altering the non-anchor carrier set, wherein the dynamic altering comprises: determining that a removal condition has been met; and responsive to determining that the removal condition has been met, removing the frequency of the non-anchor carrier from the non-anchor carrier set. ### Claim 4 (depends on 3) A method according to claim 3, wherein the removal condition is that a time elapsed since adding the frequency of the non-anchor carrier to the non-anchor carrier set exceeds a threshold. ### Claim 5 (depends on 3) A method according to claim 3, wherein the removal condition is that a distance travelled by the terminal since adding the frequency of the non-anchor carrier to the non-anchor carrier set exceeds a threshold. ### Claim 6 (depends on 2) A method according to claim 2, comprising: receiving an indication of a frequency of a further non-anchor carrier; and adding the frequency of the further non-anchor carrier to the non-anchor carrier set. ### Claim 7 (depends on 1) A method according to claim 1, wherein the plurality of frequencies comprises the frequency of the non-anchor carrier and wherein inhibiting the frequency of the non-anchor carrier comprises: assigning a first priority to the frequency of the non-anchor carrier; assigning at least one second priority to at least one respective frequency of the plurality of frequencies, other than the frequency of the non-anchor carrier, wherein the at least one second priority is higher than the first priority; and scanning the plurality of frequencies in an order based on the assigned first and second priorities. ### Claim 8 (depends on 1) A method according to claim 1, wherein inhibiting the frequency of the non-anchor carrier comprises excluding the non-anchor carrier from the scanning. ### Claim 9 (depends on 1) A method according to claim 1, wherein performing the cell search operation comprises: determining, for at least one frequency of the plurality of frequencies, whether a transmission has been received on an anchor carrier with that frequency within a time window prior to the performing the cell search; assigning a priority to the at least one frequency of the plurality based on said determining; and scanning the plurality of frequencies in an order based on the assigned priorities of the plurality of frequencies. ### Claim 10 (depends on 1) A method according to claim 1, comprising: determining at least one transmission frequency associated with a non-preferred public land mobile network; wherein the cell search operation comprises inhibiting the at least one transmission frequency associated with the non-preferred public land mobile network in the scanning. ### Claim 11 (depends on 1) A method according to claim 1 comprising, responsive to a failure of the cell search operation to establish communication with a cell of the telecommunications network, performing a further cell search operation, wherein: the further cell search operation comprises scanning the frequency of the non-anchor carrier for a cell of the telecommunications network. ### Claim 12 A terminal for use in a telecommunications system, the terminal comprising: a receiver configured to: receive a transmission on an anchor carrier, the transmission including control information; receive, on the anchor carrier, an allocation of a non-anchor carrier for receiving data, wherein the non-anchor carrier has a frequency; a memory configured to store the frequency of the non-anchor carrier; and a cell search module configured to perform a cell search comprising: scanning a plurality of frequencies for a cell of the telecommunications network; and inhibiting the frequency of the non-anchor carrier in the scanning. ### Claim 13 (depends on 12) A terminal according to claim 12, wherein the memory is a non-volatile memory. ### Claim 14 (depends on 12) A terminal according to claim 12, wherein the terminal is a Narrowband Internet of Things terminal. ### Claim 15 A non-transitory computer-readable storage medium comprising a set of computer-readable instructions stored thereon which, when executed by at least one processor of a terminal of a telecommunications network, cause the at least one processor to: receive a transmission on an anchor carrier, the transmission including control information; receive, on the anchor carrier, an allocation of a non-anchor carrier for receiving data, wherein the non-anchor carrier has a frequency; and perform a cell search operation, comprising: scanning a plurality of frequencies for a cell of the telecommunications network; and inhibiting the frequency of the non-anchor carrier in the scanning.