# US 10,313,088 B2 · System and method for characterizing dynamic interferers in advanced receivers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,313,088 B2 - Document ID: US10313088B2 - Status: Granted - Kind: B2 - Application number: 15/501,343 - Filed: 2015-08-07 - Published: 2017-08-17 - Granted: 2019-06-04 - Earliest claimed: 2014-08-07 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Robert Mark Harrison; Mats Folke; Shiwei Gao; Lars Lindbom; Siva Muruganathan - Web page: https://patentgrep.com/patent/US10313088B2 ## CPC - H04L 5/0073: {Allocation arrangements that take into account other cell interferences} - H04L 5/0035: {Resource allocation in a cooperative multipoint environment} - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04W 52/241: {taking into account channel quality metrics, e.g. SIR, SNR, CIR or Eb/lo} - H04W 72/541: using the level of interference - H04W 72/563: of the wireless resources - 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 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information} - 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 In one example embodiment, a method for identifying interfering physical channel configurations and cell-specific reference signals (CRSs) for the characterization of dynamic interferers includes constructing configuration indications. Each configuration indication may include a physical cell identity, antenna port information for a cell-specific reference signal (CRS), and an identification of a channel state information reference signal (CSI-RS). First and second configuration indications may be transmitted to a first wireless device. A first physical channel may be transmitted to the first wireless device. A second physical channel transmitted from a second network node may interfere with the first physical channel and be identifiable at least in part based on the first and second configuration indications. The first and second configuration indications may include a same physical cell identity and same antenna port information. ## Claims ### Claim 1 A method by a first network node for identifying interfering physical channel configurations and cell-specific reference signals (CRSs) for the characterization of dynamic interferers, the method comprising: constructing a plurality of configuration indications, each configuration indication comprising: a physical cell identity; antenna port information for a cell-specific reference signal (CRS); and an identification of a channel state information reference signal (CSI-RS); and transmitting, to a first wireless device, a first configuration indication and a second configuration indication of the plurality of configuration indications; and transmitting, by the first network node, a first physical channel to the first wireless device, and wherein a second physical channel transmitted from a second network node that interferes with the first physical channel is identifiable at least in part based on the first configuration indication or the second configuration indication, wherein the first configuration indication and the second configuration indication include a same physical cell identity and a same antenna port information, and wherein a plurality of resource elements that can include the CRS do not include the second physical channel. ### Claim 2 (depends on 1) The method of claim 1, wherein the first configuration indication and the second configuration indication identify a same CSI-RS. ### Claim 3 (depends on 1) The method of claim 1, wherein the first configuration indication and the second configuration indication identify different CSI-RS. ### Claim 4 (depends on 1) The method of claim 1, wherein each configuration indication further comprises: an assumed power ratio of a first power level to a second power level, the first power level being associated with the second physical channel, the second power level being associated with the CSI-RS of a second wireless device served by the second network node when the second wireless device derives channel state information feedback using the CSI-RS. ### Claim 5 (depends on 4) The method of claim 4, wherein the identification of the CSI-RS comprises a CSI-RS sequence identifier transmittable by the second network node. ### Claim 6 (depends on 1) The method of claim 1, wherein the CRS is transmitted by a plurality of transmission points. ### Claim 7 (depends on 1) The method of claim 1, wherein the CRS is transmitted on at least one same antenna port with a physical channel that is transmitted by an interfering transmission point. ### Claim 8 (depends on 1) The method of claim 1, wherein the CSI-RS is used for channel state information feedback by a second wireless device served by the second network node. ### Claim 9 (depends on 1) The method of claim 1, wherein the CSI-RS is transmitted on different antenna ports with physical channels as an interfering physical channel by an interfering transmission point. ### Claim 10 A first network node for identifying interfering physical channel configurations and cell-specific reference signals (CRSs) for the characterization of dynamic interferers, the network node comprising: a memory for storing configuration indication information; and at least one processor in communication with the memory, the at least one processor operable to construct a plurality of configuration indications, each configuration indication comprising: a physical cell identity; antenna port information for a cell-specific reference signal (CRS); and an identification of a channel state information reference signal (CSI-RS); and a transceiver operable to: transmit, to a first wireless device, a first configuration indication and a second configuration indication of the plurality of configuration indications, and transmit a first physical channel to the first wireless device, wherein a second physical channel transmitted from a second network node that interferes with the first physical channel is identifiable at least in part based on the first configuration indication or the second configuration indication, and wherein the first configuration indication and the second configuration indication include a same physical cell identity and a same antenna port information, and wherein a plurality of resource elements that can include the CRS do not include an interfering physical channel. ### Claim 11 (depends on 10) The network node of claim 10, wherein the first configuration indication and the second configuration indication identify a same CSI-RS. ### Claim 12 (depends on 10) The network node of claim 10, wherein the first configuration indication and the second configuration indication identify different CSI-RS. ### Claim 13 (depends on 10) The network node of claim 10, wherein each configuration indication further comprises: an assumed power ratio of a first power level to a second power level, the first power level being associated with the second physical channel, the second power level being associated with the CSI-RS of a second wireless device served by the second network node when the second wireless device derives channel state information feedback using the CSI-RS. ### Claim 14 (depends on 13) The network node of claim 13, wherein the identification of the CSI-RS comprises a CSI-RS sequence identifier transmittable by the second network node. ### Claim 15 (depends on 10) The network node of claim 10, wherein the CRS is transmitted by a plurality of transmission points. ### Claim 16 (depends on 10) The network node of claim 10, wherein the CRS is transmitted on at least one same antenna port with the second physical channel that is transmitted by an interfering transmission point. ### Claim 17 (depends on 10) The network node of claim 10, wherein the CSI-RS is used for channel state information feedback by a second wireless device served by the second network node. ### Claim 18 (depends on 10) The network node of claim 10, wherein the CSI-RS is transmitted on different antenna ports with physical channels as an interfering physical channel by an interfering transmission point. ### Claim 19 A first wireless device for identifying interfering physical channel configurations and cell-specific reference signals (CRSs) for the characterization of dynamic interferers, the first wireless device comprising: a memory for storing configuration indication information; and a transceiver operable to: receive, from a first network node, a first physical channel; receive, from the first network node, a plurality of configuration indications, each of the plurality of configuration indications comprising: a physical cell identity; antenna port information for a cell-specific reference signal (CRS); and an identification of a channel state information reference signal (CSI-RS); and at least one processor in communication with the memory and the transceiver, the at least one processor operable to identify a second physical channel transmitted by a second network node that interferes with the first physical channel, the second physical channel identified based at least in part on a first configuration indication and a second configuration indication of the plurality of configuration indications, the first configuration indication and the second indication including a same physical cell identity and a same antenna port information, wherein a plurality of resource elements that can include the CRS do not include an interfering physical channel. ### Claim 20 (depends on 19) The first wireless device of claim 19, wherein each configuration indication further comprises: an assumed power ratio of a first power level to a second power level, the first power level being associated with the first physical channel, the second power level being associated with the CSI-RS of a second wireless device served by the second network node when a second wireless device derives channel state information feedback using the CSI-RS. ### Claim 21 (depends on 20) The first wireless device of claim 20, wherein the identification of the CSI-RS comprises a CSI-RS sequence identifier received from the second network node. ### Claim 22 (depends on 19) The first wireless device of claim 19, wherein the CRS is transmitted on at least one same antenna port with the second physical channel that is transmitted by an interfering transmission point. ### Claim 23 (depends on 19) The first wireless device of claim 19, wherein the CSI-RS is used for channel state information feedback by a second wireless device served by the second network node. ### Claim 24 (depends on 19) The first wireless device of claim 19, wherein the CSI-RS is transmitted on different antenna ports with physical channels as an interfering physical channel by an interfering transmission point. ### Claim 25 A method by a first wireless device for identifying interfering physical channel configurations and cell-specific reference signals (CRSs) for the characterization of dynamic interferers, the method comprising: receiving, from a first network node, a first physical channel; receiving, from the first network node, a plurality of configuration indications, each of the plurality of configuration indications comprising: a physical cell identity; antenna port information for a cell-specific reference signal (CRS); and an identification of a channel state information reference signal (CSI-RS); and identifying a second physical channel transmitted by a second network node that interferes with the first physical channel, the second physical channel identified based at least in part on a first configuration indication and a second configuration indication of the plurality of configuration indications, the first configuration indication and the second indication including a same physical cell identity and a same antenna port information, wherein a plurality of resource elements that can include the CRS do not include the second physical channel. ### Claim 26 (depends on 25) The method of claim 25, wherein each configuration indication further comprises: an assumed power ratio of a first power level to a second power level, the first power level being associated with the first physical channel, the second power level being associated with the CSI-RS of a second wireless device served by the second network node when a second wireless device derives channel state information feedback using the CSI-RS. ### Claim 27 (depends on 26) The method of claim 26, wherein the identification of the CSI-RS comprises a CSI-RS sequence identifier received from the second network node. ### Claim 28 (depends on 25) The method of claim 25, wherein the CRS is transmitted on at least one same antenna port with the second physical channel that is received from an interfering transmission point. ### Claim 29 (depends on 25) The method of claim 25, wherein the CSI-RS is used for channel state information feedback by a second wireless device served by the second network node. ### Claim 30 (depends on 25) The method of claim 25, wherein the CSI-RS is transmitted on different antenna ports with physical channels as an interfering physical channel by an interfering transmission point.