# US 2021/0242959 A1 · Method and transmitting node for handling transmissions over a radio channel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242959 A1 - Document ID: US20210242959A1 - Status: Published application - Kind: A1 - Application number: 17/049,058 - Filed: 2018-04-20 - Published: 2021-08-05 - Earliest claimed: 2018-04-20 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Christer GUSTAFSSON; Anders OHLSSON - Web page: https://patentgrep.com/patent/US20210242959A1 ## CPC - H04L 1/0003: {by switching between different modulation schemes} - H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} - H04W 72/542: using measured or perceived quality - 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 Method and transmitting node (300) for handling transmissions to a receiving node (302) in a first service and in a second service over a radio channel where feedback signaling is employed to indicate either an acknowledgement, ACK, or a non-acknowledgement, NACK, of correct reception at the receiving node. A first Outer Loop Compensation, OLC, is employed in a first link adaptation for the first service and a second OLC is employed in a second link adaptation for the second service. The first OLC is adjusted (3:2) based on feedback (3:1) for transmissions in the first service, while the second OLC is adjusted (3:3) based on feedback for a repeated (3:4A) subset of the transmissions in the first service before the second service has been activated. ## Claims ### Claim 1 A method performed by a transmitting node for handling transmissions to a receiving node in a first service and in a second service over a radio channel where feedback signaling is employed to indicate either an acknowledgement, ACK, or a non-acknowledgement, NACK, of correct reception of the transmissions, the method comprising: adjusting a first Outer Loop Compensation, OLC, for the first service, based on feedback signaling from the receiving node for the transmissions in the first service, by increasing the first OLC with a first adding value ΔOLC+1 when an ACK is received and reducing the first OLC with a first reducing value ΔOLC−1 when a NACK is received, performing a first link adaptation (LA1) of the radio channel for transmissions in the first service based on an actual Signal-to-Noise Ratio, SNR, of signals in the first service and the adjusted first OLC, performing transmissions in the first service over the radio channel using the first link adaptation, repeating a subset of the transmissions in the first service, adjusting a second OLC for the second service before the second service becomes active, based on feedback signaling from the receiving node for said repeated subset of transmissions, by increasing the second OLC with a second adding value ΔOLC+2 when an ACK is received and reducing the second OLC with a second reducing value ΔOLC−2 when a NACK is received, performing a second link adaptation (LA2) of the radio channel for transmissions in the second service based on said actual SNR and the adjusted second OLC, and performing transmissions in the second service over the radio channel using the second link adaptation, once the second service becomes active. ### Claim 2 (depends on 1) The method of claim 1, wherein said subset of transmissions comprises repetition of every nth transmission in the first service where n is an integer larger than 1. ### Claim 3 (depends on 1) The method of claim 1, wherein the first adding value ΔOLC+1 is smaller than the second adding value ΔOLC+2 to achieve more robust link adaptation for the first service than for the second service. ### Claim 4 (depends on 1) The method of claim 1, wherein the first reducing value ΔOLC−1 is larger than the second reducing value ΔOLC−2 to achieve more robust link adaptation for the first service than for the second service. ### Claim 5 (depends on 3) The method of claim 3, wherein the first service requires higher quality and less throughput than the second service. ### Claim 6 (depends on 1) The method of claim 1, wherein the first and second adding values ΔOLC+1 and ΔOLC+2 are zero to achieve robust link adaptation for both the first service and the second service. ### Claim 7 (depends on 1) The method of claim 1, wherein the second link adaptation is performed so that a predefined target SNR is met according to: target SNR=actual SNR+second OLC. ### Claim 8 (depends on 1) The method of claim 1, wherein the first service requires higher quality and lower throughput than the second service. ### Claim 9 (depends on 8) The method of claim 8, wherein the first service involves communication of voice and/or video and the second service involves communication of data. ### Claim 10 (depends on 1) The method of claim 1, wherein each repeated transmission comprises the same sequence number of a used communication protocol as its original transmission. ### Claim 11 (depends on 10) The method of claim 10, wherein the repeated transmission comprises sequence numbers for Radio Link Control, RLC, and Packet Data Convergence Protocol, PDCP, which sequence numbers are incremented from the original transmission. ### Claim 12 A transmitting node arranged to handle transmissions to a receiving node in a first service and in a second service over a radio channel where feedback signaling is employed to indicate either an acknowledgement, ACK, or a non-acknowledgement, NACK, of correct reception of the transmissions, wherein the transmitting node is configured to: adjust a first Outer Loop Compensation, OLC, for the first service, based on feedback signaling from the receiving node for the transmissions in the first service, by increasing the first OLC with a first adding value ΔOLC+1 when an ACK is received and reducing the first OLC with a first reducing value ΔOLC−1 when a NACK is received, perform a first link adaptation (LA1) of the radio channel for transmissions in the first service based on an actual Signal-to-Noise Ratio, SNR, of signals in the first service and the adjusted first OLC, perform transmissions in the first service over the radio channel using the first link adaptation, repeat a subset of the transmissions in the first service, adjust a second OLC for the second service before the second service becomes active, based on feedback signaling from the receiving node for said repeated subset of transmissions, by increasing the second OLC with a second adding value ΔOLC+2 when an ACK is received and reducing the second OLC with a second reducing value ΔOLC−2 when a NACK is received, perform a second link adaptation (LA2) of the radio channel for transmissions in the second service based on said actual SNR and the adjusted second OLC, and perform transmissions in the second service over the radio channel using the second link adaptation, once the second service becomes active. ### Claim 13 (depends on 12) The transmitting node of claim 12, wherein said subset of transmissions comprises repetition of every nth transmission in the first service where n is an integer larger than 1. ### Claim 14 (depends on 12) The transmitting node of claim 12, wherein the first adding value ΔOLC+1 is smaller than the second adding value ΔOLC+2 to achieve more robust link adaptation for the first service than for the second service. ### Claim 15 (depends on 12) The transmitting node of claim 12, wherein the first reducing value ΔOLC−1 is larger than the second reducing value ΔOLC−2 to achieve more robust link adaptation for the first service than for the second service. ### Claim 16 (canceled) ### Claim 17 (depends on 12) The transmitting node of claim 12, wherein the first and second adding values ΔOLC+1 and ΔOLC+2 are zero to achieve robust link adaptation for both the first service and the second service. ### Claim 18 (depends on 12) The transmitting node of claim 12, wherein the transmitting node is configured to perform the second link adaptation so that a predefined target SNR is met according to: target SNR=actual SNR+second OLC. ### Claim 19 (depends on 12) The transmitting node of claim 12, wherein the first service requires higher quality and lower throughput than the second service, and the first service involves communication of voice and/or video and the second service involves communication of data. ### Claim 20 (canceled) ### Claim 21 (depends on 12) The transmitting node of claim 12, wherein each repeated transmission comprises the same sequence number of a used communication protocol as its original transmission, and the repeated transmission comprises sequence numbers for Radio Link Control, RLC, and Packet Data Convergence Protocol, PDCP, which sequence numbers are incremented from the original transmission. ### Claim 22 (canceled) ### Claim 23 (depends on 1) A computer program product comprising a non-transitory computer readable medium storing a computer program comprising instructions which, when executed on at least one processor, cause the at least one processor to carry out the method of claim 1. ### Claim 24 (canceled)