# US 10,455,581 B2 · Inserting virtual carrier in conventional OFDM host carrier in communications system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,455,581 B2 - Document ID: US10455581B2 - Status: Granted - Kind: B2 - Application number: 16/103,114 - Filed: 2018-08-14 - Published: 2018-12-13 - Granted: 2019-10-22 - Earliest claimed: 2011-02-04 - Assignees: Sca Ipla Holdings Inc. - Applicants: Sca Ipla Holdings Inc. - Inventors: Darren McNamara; Andrew Lillie; Peter Darwood; Martin Beale - Web page: https://patentgrep.com/patent/US10455581B2 ## CPC - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04L 5/0039: {Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0064: {Rate requirement of the data, e.g. scalable bandwidth, data priority} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC] - 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 The present disclosure provides a mobile communications system and method for communicating data to and/or from mobile communications devices. The method includes receiving, by a mobile terminal, a signal on a downlink, detecting a reduced bandwidth carrier on the downlink, and receiving downlink communications via the reduced bandwidth carrier, wherein the reduced bandwidth carrier is configured to provide a first set of resource elements within first frequency resources that are within and smaller than second frequency resources that are used by a host carrier to provide a second set of resource elements, wherein the reduced bandwidth carrier is provided in the first frequency resources in a first sub-frame, wherein the reduced bandwidth carrier is provided in third frequency resources in a second sub-frame after the first sub-frame, and wherein the third frequency resources are within and smaller than the first frequency resources. ## Claims ### Claim 1 A mobile terminal, comprising: circuitry configured to: receive a signal on a downlink; detect a reduced bandwidth carrier on the downlink; and receive downlink communications via the reduced bandwidth carrier, wherein the reduced bandwidth carrier is configured to provide a first set of resource elements within first frequency resources that are within and smaller than second frequency resources that are used by a host carrier to provide a second set of resource elements, wherein the reduced bandwidth carrier is provided in the first frequency resources in a first sub-frame, wherein the reduced bandwidth carrier is provided in third frequency resources in a second sub-frame after the first sub-frame, and wherein the third frequency resources are within and smaller than the first frequency resources. ### Claim 2 (depends on 1) The mobile terminal of claim 1, wherein the circuitry is further configured to: decode the first set of resource elements; and obtain network configuration information from the decoded first set of resource elements. ### Claim 3 (depends on 1) The mobile terminal of claim 1, wherein the circuitry is further configured to scan the first frequency resources for the reduced bandwidth carrier. ### Claim 4 (depends on 1) The mobile terminal of claim 1, wherein the circuitry is further configured to configure a receiver to receive communications transmitted in the first frequency resources. ### Claim 5 (depends on 1) The mobile terminal of claim 1, wherein the first set of resource elements includes a reduced bandwidth carrier indicator that is configured to indicate a presence of the reduced bandwidth carrier. ### Claim 6 (depends on 5) The mobile terminal of claim 5, wherein the reduced bandwidth carrier indicator is configured to indicate a location of the reduced bandwidth carrier. ### Claim 7 (depends on 5) The mobile terminal of claim 5, wherein the reduced bandwidth carrier indicator is configured to indicate a bandwidth of the reduced bandwidth carrier. ### Claim 8 (depends on 5) The mobile terminal of claim 5, wherein the reduced bandwidth carrier indicator is provided in a physical broadcast channel. ### Claim 9 (depends on 1) The mobile terminal of claim 1, wherein the reduced bandwidth carrier has a bandwidth size of at least one resource block and of fewer than one hundred resource blocks. ### Claim 10 (depends on 1) The mobile terminal of claim 1, wherein the reduced bandwidth carrier has a bandwidth size of six resource blocks. ### Claim 11 A mobile terminal, comprising: a receiver configured to receive a signal on a downlink; and processing circuitry configured to detect a reduced bandwidth carrier on the downlink, wherein the receiver is configured to receive downlink communications via the reduced bandwidth carrier, the reduced bandwidth carrier is configured to provide a first set of resource elements within first frequency resources that are within and smaller than second frequency resources that are used by a host carrier to provide a second set of resource elements, the reduced bandwidth carrier is provided in the first frequency resources in a first sub-frame, the reduced bandwidth carrier is provided in third frequency resources in a second sub-frame after the first sub-frame, and the third frequency resources are within and smaller than the first frequency resources. ### Claim 12 (depends on 11) The mobile terminal of claim 11, wherein the processing circuitry is further configured to: decode the first set of resource elements; and obtain network configuration information from the decoded first set of resource elements. ### Claim 13 (depends on 11) The mobile terminal of claim 11, wherein the processing circuitry is further configured to scan the first frequency resources for the reduced bandwidth carrier. ### Claim 14 (depends on 11) The mobile terminal of claim 11, wherein the processing circuitry is further configured to configure a receiver to receive communications transmitted in the first frequency resources. ### Claim 15 (depends on 11) The mobile terminal of claim 11, wherein the first set of resource elements includes a reduced bandwidth carrier indicator that is configured to indicate a presence of the reduced bandwidth carrier. ### Claim 16 (depends on 15) The mobile terminal of claim 15, wherein the reduced bandwidth carrier indicator is configured to indicate a location of the reduced bandwidth carrier. ### Claim 17 (depends on 15) The mobile terminal of claim 15, wherein the reduced bandwidth carrier indicator is configured to indicate a bandwidth of the reduced bandwidth carrier. ### Claim 18 (depends on 15) The mobile terminal of claim 15, wherein the reduced bandwidth carrier indicator is provided in a physical broadcast channel. ### Claim 19 (depends on 11) The mobile terminal of claim 11, wherein the reduced bandwidth carrier has a bandwidth size of at least one resource block and of fewer than one hundred resource blocks. ### Claim 20 A method performed by a mobile terminal, the method comprising: receiving a signal on a downlink; detecting a reduced bandwidth carrier on the downlink; and receiving downlink communications via the reduced bandwidth carrier, the reduced bandwidth carrier is configured to provide a first set of resource elements within first frequency resources that are within and smaller than second frequency resources that are used by a host carrier to provide a second set of resource elements, the reduced bandwidth carrier is provided in the first frequency resources in a first sub-frame, the reduced bandwidth carrier is provided in third frequency resources in a second sub-frame after the first sub-frame, and the third frequency resources are within and smaller than the first frequency resources.