# US 10,321,455 B2 · Method and apparatus for low latency transmissions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,321,455 B2 - Document ID: US10321455B2 - Status: Granted - Kind: B2 - Application number: 15/012,969 - Filed: 2016-02-02 - Published: 2017-05-11 - Granted: 2019-06-11 - Earliest claimed: 2015-11-06 - Assignees: Motorola Mobility LLC - Applicants: Motorola Mobility LLC - Inventors: Ravi Kuchibhotla; Robert T. Love; Vijay Nangia; Ravikiran Nory; Ajit Nimbalker - Web page: https://patentgrep.com/patent/US10321455B2 ## CPC - H04L 1/1854: {Scheduling and prioritising arrangements} - H04L 1/1896: {ARQ related signaling} - H04L 5/003: {Arrangements for allocating sub-channels of the transmission path} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information} - H04L 41/0803: Configuration setting - H04L 43/08: Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters - H04L 43/087: Jitter - H04L 69/329: in the application layer [OSI layer 7] - H04W 72/044: based on the type of the allocated resource - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/20: Control channels or signalling for resource management - 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 for low latency transmissions. A higher layer configuration message can be received. A first region of a subframe for receiving data packets can be determined based on the higher layer configuration message. The first region can include a first set of resource elements. The first set of resource elements can be a subset of a second set of resource elements in the first region. The first region can be used for control channel monitoring. The data packets can be mapped to at least one resource element of the first set of resource elements. The first region can be monitored by attempting to decode the data packets in the first region. Data in the data packet in the first region can be decoded. ## Claims ### Claim 1 A method comprising: receiving a higher layer configuration message, the higher layer being higher than a physical layer; determining, based on the higher layer configuration message, a first region of a subframe for receiving data packets, the first region comprising a first set of resource elements, the first set of resource elements being a subset of a second set of resource elements in the first region, where the first region is used for control channel monitoring, where the data packets are mapped to at least one resource element of the first set of resource elements; monitoring the first region, where monitoring includes attempting to decode the data packets in the first region; and decoding data in a data packet in the first region. ### Claim 2 (depends on 1) The method according to claim 1, wherein a number of resource elements in the first set is less than a number of resource elements in the second set. ### Claim 3 (depends on 1) The method according to claim 1, wherein the data packets in the first region comprise low latency data packets that have a lower maximum latency than other latency data packets in a second region, and wherein the first region is used for transmitting control signals for decoding the other latency data packets in the second region. ### Claim 4 (depends on 1) The method according to claim 1, wherein the first region comprises a first chronological region of a subframe, where the first region includes up to four multicarrier symbols. ### Claim 5 (depends on 1) The method of claim 1, wherein the data packet comprises a low latency data packet with a latency lower than other data packets, and wherein the method further comprises transmitting an acknowledgement in a subframe with a first offset from a subframe in which the low latency data packet is received in response to successful decoding of low latency data packet, wherein the first offset is different from a second offset used for the other data packets. ### Claim 6 (depends on 5) The method according to claim 5, wherein the first offset is two and transmitting an acknowledgement comprises transmitting a hybrid automatic repeat request acknowledgement in a subframe with a first offset of two subframes n+2 from the subframe n in which the low latency data packet is received. ### Claim 7 (depends on 1) The method according to claim 1, further comprising delivering the decoded data from the data packet in the first region to an application layer. ### Claim 8 (depends on 1) The method according to claim 1, wherein the first region is a control region comprising at least one physical downlink control channel including control channel elements. ### Claim 9 (depends on 8) The method according to claim 8, wherein the data packets are received on one or more of the control channel elements including resource elements from the first set of resource elements. ### Claim 10 (depends on 1) The method according to claim 1, further comprising: performing control channel monitoring in the first region; determining successful decoding of a control channel in the first region using a first identifier; and determining successful decoding of data in the data packet in the first region using a second identifier. ### Claim 11 (depends on 10) The method according to claim 10, wherein the first identifier is a Cell Radio Network Temporary Identifier received in the higher layer configuration message, and wherein the second identifier is a Low Latency Radio Network Temporary Identifier received in the higher layer configuration message. ### Claim 12 An apparatus comprising: a transceiver configured to receive a higher layer configuration message, the higher layer being higher than a physical layer; and at least one hardware controller configured to determine, based on the higher layer configuration message, a first region of a subframe for receiving data packets, the first region comprising a first set of resource elements, the first set of resource elements being a subset of a second set of resource elements in the first region, where the first region is used for control channel monitoring, where the data packets are mapped to at least one resource element of the first set of resource elements, monitor the first region, where monitoring includes attempting to decode the data packets in the first region, and decode data in a data packet in the first region. ### Claim 13 (depends on 12) The apparatus according to claim 12, wherein a number of resource elements in the first set is less than a number of resource elements in the second set. ### Claim 14 (depends on 12) The apparatus according to claim 12, wherein the data packets in the first region comprise low latency data packets that have a lower maximum latency than other latency data packets in a second region, and wherein the first region is used for transmitting control signals for decoding the other latency data packets in the second region. ### Claim 15 (depends on 12) The apparatus according to claim 12, wherein the first region comprises a first chronological region of a subframe, where the first region includes up to four multicarrier symbols. ### Claim 16 (depends on 12) The apparatus of claim 12, wherein the data packet comprises a low latency data packet with a latency lower than other data packets, and wherein the transceiver is configured to transmit an acknowledgement in a subframe with a first offset from a subframe in which the low latency data packet is received in response to successful decoding of low latency data packet, wherein the first offset is different from a second offset used for the other data packets. ### Claim 17 (depends on 16) The apparatus according to claim 16, wherein the first offset is two and transmitting an acknowledgement comprises transmitting a hybrid automatic repeat request acknowledgement in a subframe with a first offset of two subframes n+2 from the subframe n in which the low latency data packet is received. ### Claim 18 (depends on 12) The apparatus according to claim 12, wherein the controller is configured to deliver the decoded data from the data packet in the first region to an application layer. ### Claim 19 (depends on 12) The apparatus according to claim 12, wherein the first region is a control region comprising at least one physical downlink control channel including control channel elements. ### Claim 20 (depends on 19) The apparatus according to claim 19, wherein the data packets are received on one or more of the control channel elements including resource elements from the first set of resource elements. ### Claim 21 (depends on 12) The apparatus according to claim 12, wherein the controller is configured to perform control channel monitoring in the first region; determine successful decoding of a control channel in the first region using a first identifier; and determine successful decoding of data in the data packet in the first region using a second identifier. ### Claim 22 (depends on 21) The apparatus according to claim 21, wherein the first identifier is a Cell Radio Network Temporary Identifier received in the higher layer configuration message, and wherein the second identifier is a Low Latency Radio Network Temporary Identifier received in the higher layer configuration message. ### Claim 23 A method comprising: receiving a higher layer configuration message, the higher layer being higher than a physical layer; determining, based on the higher layer configuration message, a first region of a subframe for receiving low latency data packets, where the first region is used for control channels that assign resource allocation for other latency data packets in a second region after the first region in the subframe, where low latency data packets have a lower maximum latency than other latency data packets, and where the first region is also used for the low latency data packets; monitoring low latency data packets in the first region in response to receiving the higher layer configuration message, where monitoring includes attempting to decode a low latency data packet in the first region; and successfully decoding data in the low latency data packet in the first region.