# US 10,122,558 B2 · Method and apparatus for reception of control signaling > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,122,558 B2 - Document ID: US10122558B2 - Status: Granted - Kind: B2 - Application number: 15/012,232 - Filed: 2016-02-01 - Published: 2016-10-13 - Granted: 2018-11-06 - Earliest claimed: 2015-04-10 - Assignees: Motorola Mobility LLC - Applicants: Motorola Mobility LLC - Inventors: Ravikiran Nory; Vijay Nangia; Ajit Nimbalker - Web page: https://patentgrep.com/patent/US10122558B2 ## CPC - H04L 27/2601: {Multicarrier modulation systems} - H04L 1/0046: {Code rate detection or code type detection (H04L1/0038 takes precedence; detection of the data rate H04L25/0262; for packet format H04L1/0091)} - H04L 1/0052: {Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables} - H04L 1/0072: {Error control for data other than payload data, e.g. control data} - H04L 5/001: {the frequencies being arranged in component carriers} - 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 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0096: {Indication of changes in allocation} - H04L 27/2607: {Cyclic extensions} - H04L 27/261: {Details of reference signals} - H04L 27/2647: {Arrangements specific to the receiver only (equalisation H04L27/01)} - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 72/044: based on the type of the allocated resource - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method and apparatus provide reception of control signaling in a wireless communication network. Downlink Control Information (DCI) containing PDSCH resource assignments can be received in one of two types of control channels in a subframe. A type of truncation of the subframe can be determined based on the type of control channel on which the DCI is received. The PDSCH can be decoded based on at least the determined type of truncation of the subframe. ## Claims ### Claim 1 A method in a device, the method comprising: receiving downlink control information containing physical downlink shared channel resource assignments in one of two types of control channels in a subframe; determining a type of truncation of the subframe based on the type of control channel on which the downlink control information is received; and decoding the physical downlink shared channel based on at least the determined type of truncation of the subframe. ### Claim 2 (depends on 1) The method according to claim 1, wherein the downlink control information includes a subframe truncation field indicating a truncation value for receiving the physical downlink shared channel in the subframe, and wherein decoding comprises decoding the physical downlink shared channel based on at least the determined type of truncation of the subframe and the truncation value. ### Claim 3 (depends on 1) The method according to claim 1, wherein decoding comprises decoding the physical downlink shared channel based on the determined type of truncation of the subframe and other information included in the downlink control information. ### Claim 4 (depends on 1) The method according to claim 1, wherein determining comprises ascertaining that the truncation is a back truncation in the subframe if the downlink control information is received in a physical downlink control channel. ### Claim 5 (depends on 4) The method according to claim 4, further comprising estimating a downlink channel quality based on reference signals in at least one of the beginning two orthogonal frequency division multiplexing symbols in the subframe. ### Claim 6 (depends on 1) The method according to claim 1, wherein determining comprises ascertaining that the truncation is a front truncation in the subframe if downlink control information is received in an enhanced physical downlink control channel. ### Claim 7 (depends on 6) The method according to claim 6, further comprising estimating a downlink channel quality based on reference signals present in orthogonal frequency division multiplexing symbols other than at least one of the first two orthogonal frequency division multiplexing symbols of the subframe. ### Claim 8 (depends on 1) The method according to claim 1, wherein the device comprises a user equipment, and wherein the method further comprises communicating with a base station using a primary serving cell operating on a licensed carrier and a secondary serving cell operating on an unlicensed carrier. ### Claim 9 (depends on 8) The method according to claim 8, wherein receiving, determining, and decoding are performed on the Scell. ### Claim 10 An apparatus comprising: a transceiver configured to receive downlink control information containing physical downlink shared channel resource assignments in one of two types of control channels in a subframe; and a controller configured to determine a type of truncation of the subframe based on the type of control channel on which the downlink control information is received and configured to decode the physical downlink shared channel based on at least the determined type of truncation of the subframe. ### Claim 11 (depends on 10) The apparatus according to claim 10, wherein the transceiver is configured to receive a subframe truncation field in the downlink control information, the subframe truncation field indicating a truncation value for receiving the physical downlink shared channel in the subframe, and wherein the controller is configured to decode the physical downlink shared channel based on at least the determined type of truncation of the subframe and the truncation value. ### Claim 12 (depends on 10) The apparatus according to claim 10, wherein the controller is configured to decode the physical downlink shared channel based on the determined type of truncation of the subframe and other information included in the downlink control information. ### Claim 13 (depends on 10) The apparatus according to claim 10, wherein the controller is configured to determine the type of truncation by ascertaining that the truncation is a back truncation in the subframe if the downlink control information is received in a physical downlink control channel. ### Claim 14 (depends on 13) The apparatus according to claim 13, wherein the controller is configured to estimate a downlink channel quality based on reference signals in at least one of the beginning two orthogonal frequency division multiplexing symbols in the subframe. ### Claim 15 (depends on 10) The apparatus according to claim 10, wherein the controller is configured to determine the type of truncation by ascertaining that the truncation is a front truncation in the subframe if downlink control information is received in an enhanced physical downlink control channel. ### Claim 16 (depends on 15) The apparatus according to claim 15, wherein the controller is configured to estimate a downlink channel quality based on reference signals present in orthogonal frequency division multiplexing symbols other than at least one of the first two orthogonal frequency division multiplexing symbols of the subframe. ### Claim 17 (depends on 10) The apparatus according to claim 10, wherein the device comprises a user equipment, and wherein the transceiver is configure to communicate with a base station using a primary serving cell operating on a licensed carrier and a secondary serving cell operating on an unlicensed carrier. ### Claim 18 (depends on 17) The apparatus according to claim 17, wherein receiving, determining, and decoding are performed on the Scell. ### Claim 19 A method in a first device, the method comprising: communicating with second device using a primary serving cell operating on a licensed carrier and a secondary serving cell operating on an unlicensed carrier; receiving downlink control information containing physical downlink shared channel resource assignments in one of two types of control channels in a subframe from the second device; ascertaining a type of subframe truncation is a back truncation if the downlink control information is received in a physical downlink control channel; ascertaining the type of subframe truncation is a front truncation if downlink control information is received in an enhanced physical downlink control channel; and attempting to decode a physical downlink shared channel from the second device based on at least the ascertained type of truncation of the subframe. ### Claim 20 (depends on 19) The method according to claim 19, wherein receiving, determining, and decoding are performed on the Scell. ### Claim 21 (depends on 1) The method according to claim 1, wherein a subframe comprises a number of symbols, and wherein truncation of a subframe comprises shortening transmissions in a subframe to less than the number of symbols of the subframe. ### Claim 22 (depends on 10) The apparatus according to claim 10, wherein a subframe comprises a number of symbols, and wherein truncation of a subframe comprises shortening transmissions in a subframe to less than the number of symbols of the subframe. ### Claim 23 (depends on 19) The method according to claim 19, wherein a subframe comprises a number of symbols, and wherein truncation of a subframe comprises shortening transmissions in a subframe to less than the number of symbols of the subframe. ### Claim 24 (depends on 1) The method according to claim 1, wherein the types of control channels comprise types of physical downlink control channels.