# US 2017/0289984 A1 · Mechanisms for multi-tier distributed co-operative multi-point technology > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0289984 A1 - Document ID: US20170289984A1 - Status: Published application - Kind: A1 - Application number: 15/181,971 - Filed: 2016-06-14 - Published: 2017-10-05 - Earliest claimed: 2016-04-01 - Assignees: Huawei Technologies Co., Ltd. - Inventors: MOHAMMADHADI BALIGH; ALIREZA BAYESTEH; KEYVAN ZARIFI; USA VILAIPORNSAWAI; YICHENG LIN - Web page: https://patentgrep.com/patent/US20170289984A1 ## CPC - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04B 7/024: Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems - H04B 7/0452: Multi-user MIMO systems - H04B 7/0623: {Auxiliary parameters, e.g. power control [PCB] or not acknowledged commands [NACK], used as feedback information} - H04B 7/0632: {Channel quality parameters, e.g. channel quality indicator [CQI]} - H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04L 1/1819: {with retransmission of additional or different redundancy} - H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)} - H04L 1/1896: {ARQ related signaling} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0035: {Resource allocation in a cooperative multipoint environment} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - 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 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04L 5/0078: {Timing of allocation} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 5/0096: {Indication of changes in allocation} - H04L 27/2601: {Multicarrier modulation systems} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 72/046: {the resource being in the space domain, e.g. beams} - H04W 72/0466: {the resource being a scrambling code} - H04W 72/0473: {the resource being transmission power} - H04W 72/20: Control channels or signalling for resource management - H04W 72/542: using measured or perceived quality - H04L 1/0003: {by switching between different modulation schemes} - H04L 1/0009: {by adapting the channel coding (H04L1/1812 takes precedence)} - H04L 5/0014: {Three-dimensional division} - H04L 5/0026: {Division using four or more dimensions, e.g. beam steering or quasi-co-location [QCL]} - H04L 5/0057: {Physical resource allocation for CQI} - H04W 52/34: TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Embodiments of the present disclosure provide mechanisms for the following procedures: network signaling for user equipment (UE) measurements; UE measurements; UE feedback; feedback adjustment at network nodes; scheduling; Acknowledgements/Negative Acknowledgements; and network-wide planning. Some or all of these mechanisms can be used in implementing distributed open-loop multi-user co-operative multi-point (MU-CoMP) technology as well as other non-CoMP, one-tier or centralized wireless transmission technologies. The mechanisms are in line with proposed no-cell technology for 5G communication networks. ## Claims ### Claim 1 A method in a network node, the method comprising: transmitting a pilot pattern; and transmitting control information associating one or more first transmit layers with the pilot pattern, the first transmit layers having predefined modulation and coding and being multiplexed in a time-frequency resource space in at least one of: a time domain, a frequency domain, a code domain, a power domain, and a space domain. ### Claim 2 (depends on 1) The method of claim 1, wherein, for each of the first transmit layers, the control information comprises information indicating: the pilot pattern that is associated with the transmit layer; and a predefined MCS associated with the transmit layer. ### Claim 3 (depends on 2) The method of claim 2, wherein the information indicating a predefined MCS associated with the transmit layer comprises information associating the predefined MCS with the pilot pattern associated with the transmit layer. ### Claim 4 (depends on 2) The method of claim 2, wherein: the first transmit layers are transmitted using sparse code multiple access (SCMA) or low density signature orthogonal frequency division multiplexing (LDS-OFDM) waveforms; and the control information further comprises information indicating codebooks or signatures associate with the first transmit layers. ### Claim 5 (depends on 2) The method of claim 2, wherein the control information further comprises information indicating a transmit power associated with the transmit layer. ### Claim 6 (depends on 1) The method of claim 1, further comprising: receiving, from a user equipment (UE), feedback information identifying first transmit layers the UE was able to jointly detect; and scheduling data transmission for the UE based on the feedback information. ### Claim 7 (depends on 6) The method of claim 6, wherein the feedback information identifying first transmit layers the UE was able to jointly detect comprises information identifying indices of the first transmit layers the UE was able to jointly detect. ### Claim 8 (depends on 1) The method of claim 1, wherein the first transmit layers are multiplexed in a first transmission tier, the method further comprising: receiving, from a user equipment (UE), feedback information comprising at least one of: information identifying first transmit layers the UE was able to jointly detect in the first transmission tier; and information identifying channel quality indicators (CQIs) for second transmit layers having adaptive modulation and coding and being multiplexed in a second transmission tier, the first and second transmission tiers being in respective time-frequency resource spaces that at least partially overlap; and scheduling data transmission for the UE based on the feedback information. ### Claim 9 (depends on 8) The method of claim 8, further comprising: adjusting the feedback information received from the UE based on an average number of transmit layers the UE has received at each of a number of scheduling intervals; and scheduling data transmission for the UE based on the adjusted feedback information. ### Claim 10 (depends on 8) The method of claim 8, further comprising: receiving, from a central coordinator, a feedback adjustment instruction regarding adjustment of the feedback information from the UE; adjusting the feedback information from the UE in accordance with the feedback adjustment instruction; and scheduling data transmission for the UE based on the adjusted feedback information. ### Claim 11 (depends on 8) The method of claim 8, further comprising: triggering a hybrid automatic repeat request (HARQ) mechanism and/or an outer loop link adaptation (OLLA) mechanism in the second transmission tier based on receipt of an acknowledgement (ACK) or negative acknowledgement (NACK) from the UE regarding a data packet transmitted in the second transmission tier. ### Claim 12 (depends on 11) The method of claim 11, further comprising: in response to receiving a NACK from the UE regarding a data packet transmitted in the second transmission tier, rescheduling the data transmission in the first transmission tier if a resend rate in the second transmission tier is below a threshold. ### Claim 13 (depends on 6) The method of claim 6, wherein: the time-frequency resource space comprises a plurality of zones of time-frequency resources; and the feedback information identifying the first transmit layers the UE was able to jointly detect comprises, for each of at least one of the zones, zone-specific feedback information identifying jointly detectable first transmit layers in the zone. ### Claim 14 (depends on 13) The method of claim 13, wherein the control information comprises zoning information identifying, for each of at least one of the zones, an associated set of transmission parameters for the zone. ### Claim 15 (canceled) ### Claim 16 (canceled) ### Claim 17 (canceled) ### Claim 18 (canceled) ### Claim 19 (canceled) ### Claim 20 (canceled) ### Claim 21 (canceled) ### Claim 22 A network device comprising: a wireless interface; a processor operatively coupled to the wireless interface; and a computer readable storage medium operatively coupled to the processor, the computer readable storage medium storing programming for execution by the processor, the programming comprising instructions to: transmit, via the wireless interface, a pilot pattern; and transmit, via the wireless interface, control information associating one or more first transmit layers with the pilot pattern, the first transmit layers having predefined modulation and coding and being multiplexed in a time-frequency resource space in at least one of: a time domain, a frequency domain, a code domain, a power domain, and a space domain. ### Claim 23 (depends on 22) The network device of claim 22, wherein, for each of the first transmit layers, the control information comprises information indicating: the pilot pattern that is associated with the transmit layer; and a predefined MCS associated with the transmit layer. ### Claim 24 (depends on 23) The network device of claim 23, wherein the control information further comprises information indicating a transmit power associated with the transmit layer. ### Claim 25 (depends on 22) The network device of claim 22, wherein the instructions further comprise instructions to: receive, via the wireless interface, feedback information from a user equipment (UE) identifying first transmit layers the UE was able to jointly detect; and schedule data transmission for the UE based on the feedback information. ### Claim 26 (depends on 22) The network device of claim 22, wherein: the first transmit layers are multiplexed in a first transmission tier; and the instructions further comprise instructions to: receive, via the wireless interface, feedback information from a user equipment (UE), the feedback information comprising at least one of: information identifying first transmit layers the UE was able to jointly detect in the first transmission tier; and information identifying channel quality indicators (CQIs) for second transmit layers having adaptive modulation and coding and being multiplexed in a second transmission tier, the first and second transmission tiers being in respective time-frequency resource spaces that at least partially overlap; and schedule data transmission for the UE based on the feedback information. ### Claim 27 (depends on 26) The network device of claim 26, wherein the instructions further comprise instructions to: adjust the feedback information received from the UE based on an average number of transmit layers the UE has received at each of a number of scheduling intervals; and schedule data transmission for the UE based on the adjusted feedback information. ### Claim 28 (depends on 26) The network device of claim 26, wherein the instructions further comprise instructions to trigger a hybrid automatic repeat request (HARQ) mechanism and/or an outer loop link adaptation (OLLA) mechanism in the second transmission tier based on receipt of an acknowledgement (ACK) or negative acknowledgement (NACK) from the UE regarding a data packet transmitted in the second transmission tier. ### Claim 29 (depends on 25) The network device of claim 25, wherein: the time-frequency resource space comprises a plurality of zones of time-frequency resources; and the instructions to receive feedback information identifying the first transmit layers the UE was able to jointly detect comprise instructions to receive, for each of at least one of the zones, zone-specific feedback information identifying first transmit layers that the UE was able to jointly detect in the zone. ### Claim 30 (depends on 29) The network device of claim 29, wherein the control information comprises zoning information identifying, for each of at least one of the zones, an associated set of transmission parameters for the zone. ### Claim 31 (canceled) ### Claim 32 (canceled) ### Claim 33 (canceled) ### Claim 34 (canceled) ### Claim 35 (canceled) ### Claim 36 (canceled) ### Claim 37 (canceled) ### Claim 38 (canceled) ### Claim 39 (canceled) ### Claim 40 (canceled) ### Claim 41 (canceled) ### Claim 42 (canceled) ### Claim 43 (canceled) ### Claim 44 (canceled) ### Claim 45 (canceled) ### Claim 46 (canceled) ### Claim 47 (canceled) ### Claim 48 (canceled) ### Claim 49 (canceled) ### Claim 50 (canceled) ### Claim 51 (canceled) ### Claim 52 (canceled) ### Claim 53 (canceled) ### Claim 54 (canceled) ### Claim 55 (canceled) ### Claim 56 (canceled) ### Claim 57 (canceled) ### Claim 58 (canceled) ### Claim 59 (canceled) ### Claim 60 (canceled) ### Claim 61 (canceled) ### Claim 62 (canceled) ### Claim 63 (canceled) ### Claim 64 (canceled) ### Claim 65 (canceled) ### Claim 66 (canceled) ### Claim 67 (canceled) ### Claim 68 (canceled) ### Claim 69 (canceled) ### Claim 70 (canceled) ### Claim 71 (canceled)