# US 11,121,819 B2 · Systems and methods for improved uplink coverage > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,121,819 B2 - Document ID: US11121819B2 - Status: Granted - Kind: B2 - Application number: 16/599,162 - Filed: 2019-10-11 - Published: 2020-02-06 - Granted: 2021-09-14 - Earliest claimed: 2012-01-24 - Assignees: InterDigital Patent Holdings, Inc. - Applicants: InterDigital Patent Holdings, Inc. - Inventors: Marian Rudolf; Paul Marinier; Diana Pani; Ghyslain Pelletier; Christopher R. Cave; Lakshmi R. Iyer; Muhammad U. Fazili - Web page: https://patentgrep.com/patent/US11121819B2 ## CPC - H04L 1/1678: {where the control information is for timing, e.g. time stamps} - H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} - H04L 1/1822: involving configuration of automatic repeat request [ARQ] with parallel processes - H04L 1/1864: {ARQ related signaling (H04L1/1607 takes precedence)} - H04L 1/1887: {Scheduling and prioritising arrangements} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04L 1/1893: {Physical mapping arrangements (physical resource mapping in general H04L5/00)} - 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 Systems and method are specified to improve the reception of UL transmission, for example in power or coverage limited situations. A WTRU may modify procedures to increase the available signal energy for reception at an eNB and/or to make more efficient use of the available signal energy at the receiver for processing UL transmissions. Example methods for increasing UL link coverage may include modifying HARQ timing (e.g., shorter HARQ), using longer TTIs, use of dedicated PUSCH allocations, use of new PUSCH modulations, enhanced reference signal design, UL macro diversity reception for PUSCH, utilizing protocol reduction techniques, ensuring in-order packet delivery, and/or utilizing a configuration for coverage limited/power limited modes of operation. The proposed methods may be applied individually or in any combination. ## Claims ### Claim 1 A wireless transmit receive unit (WTRU), comprising: a processor configured to: receive, from a network entity, configuration information indicating a grant to be used by the WTRU for uplink transmissions, the configuration information further indicating that the grant is valid for a duration of time and that grant is to repeat at a specific periodicity; store information regarding the grant so as to use the grant as a configured uplink grant; determine that an uplink transmission is to be sent during the duration of time; and send the uplink transmission using one or more resources associated with the configured uplink grant in accordance with the information stored by the WTRU. ### Claim 2 (depends on 1) The WTRU of claim 1, wherein the processor being configured to send the uplink transmission in accordance with the information stored by the WTRU comprises the processor being configured to send the uplink transmission without receiving a separate resource allocation from the network entity for the uplink transmission. ### Claim 3 (depends on 1) The WTRU of claim 1, wherein the processor being configured to store the information regarding the grant so as to use the grant as the configured uplink grant comprises the processor being configured to store allocation information regarding the one or more resources associated with the configured uplink grant. ### Claim 4 (depends on 3) The WTRU of claim 3, wherein the processor is further configured to receive, from the network entity, an indication of an index into a table that indicates the one or more resources associated with the configured uplink grant. ### Claim 5 (depends on 1) The WTRU of claim 1, wherein the specific periodicity is more often than once every ten milliseconds. ### Claim 6 (depends on 1) The WTRU of claim 1, wherein the specific periodicity is more often than once every ten subframes. ### Claim 7 (depends on 1) The WTRU of claim 1, wherein the configuration information is received in a radio resource control (RRC) message. ### Claim 8 (depends on 1) The WTRU of claim 1, wherein the one or more resources comprise a time domain and/or a frequency domain resource. ### Claim 9 (depends on 1) The WTRU of claim 1, wherein the processor is further configured to receive a downlink control channel transmission that activates the grant. ### Claim 10 (depends on 9) The WTRU of claim 9, wherein the downlink control channel transmission comprises downlink control information (DCI) and wherein the grant is activated by the DCI. ### Claim 11 A method implemented by a wireless transmit receive unit (WTRU), the method comprising: receiving, from a network entity, configuration information indicating a grant to be used by the WTRU for uplink transmissions, the configuration information further indicating that the grant is valid for a duration of time and that the grant is to repeat at a specific periodicity; storing information regarding the grant so as to use the grant as a configured uplink grant; determining that an uplink transmission is to be sent during the duration of time; and sending the uplink transmission using one or more resources associated with the configured uplink grant in accordance with the information stored by the WTRU. ### Claim 12 (depends on 11) The method of claim 11, wherein sending the uplink transmission in accordance with the information stored by the WTRU comprises sending the uplink transmission without receiving a separate resource allocation from the network entity for the uplink transmission. ### Claim 13 (depends on 11) The method of claim 11, wherein storing information regarding the grant so as to use the grant as the configured uplink grant comprises storing allocation information regarding the one or more resources associated with the configured uplink grant. ### Claim 14 (depends on 13) The method of claim 13, further comprising receiving, from the network entity, an indication of an index into a table that indicates the one or more resources associated with the configured uplink grant. ### Claim 15 (depends on 11) The method of claim 11, wherein the specific periodicity is more often than once every ten milliseconds. ### Claim 16 (depends on 11) The method of claim 11, wherein the specific periodicity is more often than once every ten subframes. ### Claim 17 (depends on 11) The method of claim 11, wherein the configuration information is received in a radio resource control (RRC) message. ### Claim 18 (depends on 11) The method of claim 11, wherein the one or more resources comprise a time domain and/or a frequency domain resource. ### Claim 19 (depends on 11) The method of claim 11, further comprising receiving a downlink control channel transmission that activates the grant. ### Claim 20 (depends on 19) The method of claim 19, wherein the downlink control channel transmission comprises downlink control information (DCI) and wherein the grant is activated by the DCI.