# US 2017/0288808 A1 · Csi reference resource and cqi report for mtc operation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0288808 A1 - Document ID: US20170288808A1 - Status: Published application - Kind: A1 - Application number: 15/318,745 - Filed: 2016-11-04 - Published: 2017-10-05 - Earliest claimed: 2015-11-06 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Yufei Blankenship; Robert Mark Harrison - Web page: https://patentgrep.com/patent/US20170288808A1 ## CPC - H04L 1/0026: {Transmission of channel quality indication} - H04L 1/0016: {involving special memory structures, e.g. look-up tables} - H04L 1/0073: {Special arrangements for feedback channel} - H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} - H04L 27/2607: {Cyclic extensions} - H04W 72/0446: Resources in time domain, e.g. slots or frames - 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 methods are provided for deriving channel feedback for a physical channel based on an indication of the number of transmission repetitions. In some embodiments, a method for use in a wireless device for determining channel feedback for a physical channel includes receiving control signaling including an indication of a number of transmission repetitions of the physical channel. The method also includes deriving the channel feedback for the physical channel based on the indication of the number of transmission repetitions, where a code rate corresponding to the channel feedback corresponds to an effective channel code rate of the physical channel occupying a group of physical resources including the number of transmission repetitions. In this way, the wireless device may report channel conditions that are better than the channel conditions corresponding to a single transmission, according to some embodiments. ## Claims ### Claim 1 A method for use in a wireless device of determining channel feedback for a physical channel, comprising: receiving, from a network node, control signaling comprising an indication of a number of transmission repetitions of the physical channel; and deriving the channel feedback for the physical channel based on the indication of the number of transmission repetitions, where a code rate corresponding to the channel feedback corresponds to an effective channel code rate of the physical channel occupying a group of physical resources comprising the number of transmission repetitions. ### Claim 2 (depends on 1) The method of claim 1 further comprising: reporting, to the network node, the channel feedback for the physical channel. ### Claim 3 (depends on 1) The method of claim 1 wherein the channel feedback is chosen from the group consisting of a Channel State Information, CSI, feedback, a Channel Quality Indication, CQI, and a CSI feedback comprising a CQI. ### Claim 4 (depends on 1) The method of claim 1 wherein the group of physical resources is termed a CSI reference resource, wherein the CSI reference resource occupies a plurality of subframes. ### Claim 5 (depends on 1) The method of claim 1 further comprising: receiving, from the network node, control signaling comprising an indication of a frequency hopping pattern of the physical channel; and wherein deriving the channel feedback for the physical channel comprises deriving the channel feedback for the physical channel assuming that the frequency hopping pattern is used. ### Claim 6 (depends on 5) The method of claim 5, wherein: the frequency hopping pattern identifies a set of Physical Resource Blocks, PRBs, that the physical channel will occupy if the physical channel is transmitted in a first subframe; the set of PRBs is contiguous in frequency; and the set of PRBs is different if the physical channel is transmitted in a second subframe. ### Claim 7 (depends on 1) The method of claim 1 wherein: Channel State Information, CSI, feedback comprises a Channel Quality Indication, CQI, index selected from a plurality of CQI indices, where each of the plurality of CQI indices is associated with the number of transmission repetitions of the physical channel. ### Claim 8 (depends on 7) The method of claim 7 wherein the plurality of CQI indices composes a first CQI definition table for the number of transmission repetitions of the physical channel and a second CQI definition table comprises a second plurality of CQI indices for a second number of transmission repetitions of the physical channel. ### Claim 9 (depends on 1) The method of claim 1 wherein the number of transmission repetitions of the physical channel is not applicable to a Machine-Type Communication, MTC, User Equipment, UE, in Coverage Enhancement, CE, mode B, but can be configured for a UE in CE mode A. ### Claim 10 (depends on 1) The method of claim 1 wherein the transmission repetitions of the physical channel are transmitted over subframes in a first Channel State Information, CSI, subframe set, where the transmission repetitions skip subframes not in the first CSI subframe set. ### Claim 11 (depends on 1) The method of claim 1 wherein the group of physical resources is a 6-PRB narrowband in a subframe that is also used for Machine-Type Communication, MTC, Physical Downlink Control Channel, M-PDCCH, monitoring and/or the physical channel reception. ### Claim 12 (depends on 7) The method of claim 7 wherein the number of transmission repetitions of the physical channel is fixed for all CQI values in the plurality of CQI indices. ### Claim 13 (depends on 1) The method of claim 1 wherein value of the number of transmission repetitions is signaled in a dedicated manner. ### Claim 14 (depends on 1) The method of claim 1 wherein the physical channel is chosen from the group consisting of a Physical Downlink Shared Channel, PDSCH, and a Physical Downlink Control Channel, PDCCH. ### Claim 15 (depends on 14) The method of claim 14 wherein the physical channel is the PDSCH. ### Claim 16 A User Equipment, UE, comprising: circuitry comprising one or more processors and a memory containing instructions whereby the UE is configured to: receive, from a network node, control signaling comprising an indication of a number of transmission repetitions of a physical channel; and derive channel feedback for the physical channel based on the indication of the number of transmission repetitions, where a code rate corresponding to the channel feedback corresponds to an effective channel code rate of the physical channel occupying a group of physical resources comprising the number of transmission repetitions. ### Claim 17 (canceled) ### Claim 31 A method for use in a network node for receiving channel feedback for a physical channel, comprising: transmitting, to a wireless device, control signaling comprising an indication of a number of transmission repetitions of the physical channel to a wireless device; and receiving, from the wireless device, the channel feedback for the physical channel where a code rate corresponding to the channel feedback corresponds to an effective channel code rate of the physical channel occupying a group of physical resources comprising the number of transmission repetitions. ### Claim 32 (depends on 31) The method of claim 31 further comprising: transmitting, to the wireless device, control signaling comprising an indication of a frequency hopping pattern of the physical channel; and wherein receiving the channel feedback for the physical channel further comprises receiving the channel feedback for the physical channel assuming that the frequency hopping pattern is used. ### Claim 33 (depends on 31) The method of any of claim 31 wherein the channel feedback is chosen from the group consisting of a Channel State Information, CSI, feedback, a Channel Quality Indication, CQI, and a CSI feedback comprising a CQI. ### Claim 34 (depends on 31) The method of any of claim 31 wherein the group of physical resources is termed a CSI reference resource, wherein the CSI reference resource occupies a plurality of subframes. ### Claim 35 (depends on 33) The method of claim 33 wherein the channel feedback is a CSI feedback. ### Claim 36 (depends on 32) The method of claim 32, wherein: the frequency hopping pattern identifies a set of Physical Resource Blocks, PRBs, that the physical channel will occupy if the physical channel is transmitted in a first subframe; the set of PRBs is contiguous in frequency; and the set of PRBs is different if the physical channel is transmitted in a second subframe. ### Claim 37 (depends on 31) The method of claim 31 wherein: Channel State Information, CSI, feedback comprises a Channel Quality Indication, CQI, index selected from a plurality of CQI indices, where each of the plurality of CQI indices is associated with the number of transmission repetitions of the physical channel. ### Claim 38 (depends on 37) The method of claim 37 wherein the plurality of CQI indices composes a first CQI definition table for the number of transmission repetitions of the physical channel and a second CQI definition table comprises a second plurality of CQI indices for a second number of transmission repetitions of the physical channel. ### Claim 39 (depends on 31) The method of claim 31 wherein the number of transmission repetitions of the physical channel is not applicable to a Machine-Type Communication, MTC, User Equipment, UE, in Coverage Enhancement, CE, mode B, but can be configured for a UE in CE mode A. ### Claim 40 (depends on 31) The method of claim 31 wherein the transmission repetitions of the physical channel are transmitted over subframes in a first Channel State Information, CSI, subframe set, where the transmission repetitions skip subframes not in the first CSI subframe set. ### Claim 41 (depends on 31) The method of claim 31 wherein the group of physical resources is a 6-PRB narrowband in a subframe that is also used for Machine-Type Communication, MTC, Physical Downlink Control Channel, M-PDCCH, monitoring and/or the physical channel reception. ### Claim 42 (depends on 37) The method of claim 37 wherein the number of transmission repetitions of the physical channel is fixed for all CQI values in the plurality of CQI indices. ### Claim 43 (depends on 31) The method of claim 31 wherein the value of the number of transmission repetitions is signaled in a dedicated manner. ### Claim 44 (depends on 31) The method of claim 31 wherein the physical channel is chosen from the group consisting of a Physical Downlink Shared Channel, PDSCH, and a Physical Downlink Control Channel, PDCCH. ### Claim 45 (depends on 44) The method of claim 44 wherein the physical channel is the PDSCH. ### Claim 46 A network node comprising: circuitry comprising one or more processors and a memory containing instructions whereby the network node is configured to: transmit, to a wireless device, control signaling comprising an indication of a number of transmission repetitions of a physical channel to a wireless device; and receive, from the wireless device, channel feedback for the physical channel where a code rate corresponding to the channel feedback corresponds to an effective channel code rate of the physical channel occupying a group of physical resources comprising the number of transmission repetitions. ### Claim 47 (canceled)