# US 9,883,517 B2 · Uplink interference resolution in a wireless communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,883,517 B2 - Document ID: US9883517B2 - Status: Granted - Kind: B2 - Application number: 15/073,059 - Filed: 2016-03-17 - Published: 2016-07-07 - Granted: 2018-01-30 - Earliest claimed: 2013-03-15 - Assignees: Taiwan Semiconductor Manufacturing Company, Ltd. - Applicants: Taiwan Semiconductor Manufacturing Co., Ltd. - Inventors: Kenneth L. Standwood; David Gell; Murat Karsi - Web page: https://patentgrep.com/patent/US9883517B2 ## CPC - H04W 72/541: using the level of interference - H04J 11/00: Orthogonal multiplex systems, {e.g. using WALSH codes}(H04J13/00 takes precedence) - H04J 11/0056: {Inter-base station aspects} - H04W 16/32: Hierarchical cell structures - H04W 28/0236: {radio quality, e.g. interference, losses or delay} - H04W 40/38: adapting due to varying relative distances between nodes - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 72/27: between access points - H04W 84/045: {using private Base Stations, e.g. femto Base Stations, home Node B} - H04W 88/02: Terminal devices - H04W 88/08: Access point devices - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) ## Abstract An access node is provided in a wireless communication network for conducting interference resolution of a received signal, the access node comprising a transceiver module, a backhaul module, and a memory. The access node further comprises a processor coupled to the transceiver module, the backhaul module and the memory and configured to identify a neighboring access node in the wireless communication network, to exchange, via the backhaul module, communication parameters with the neighboring access node, to receive, via the transceiver module, a signal comprising a transmission from a first user equipment and an interfering transmission from a second user equipment, the signal being received over a plurality of uplink resources, to receive, via the backhaul module, resource information from the neighboring access node, the resource information corresponding to the plurality of uplink resources, and to apply the resource information for interference resolution of the received signal. ## Claims ### Claim 1 An access node in a wireless communication network, the access node providing interference resolution assistance to a neighboring access node, the access node comprising: a transceiver module configured to receive and send data via the wireless communication network; a backhaul transceiver configured to receive and send data via a backhaul communication link; a memory; and a processor coupled to the transceiver module, the backhaul transceiver and the memory and configured to: exchange, via the backhaul transceiver, communication parameters with the neighboring access node, receive, via the transceiver module, a signal comprising a non-interfering transmission and an interfering transmission, receive, via the backhaul transceiver, an assistance request from the neighboring access node, the assistance request including an identification of a plurality of uplink resources, and send, via the backhaul transceiver and in response to the assistance request, resource information to the neighboring access node, wherein the resource information is associated with the signal which is received over the identified plurality of uplink resources and is obtained from a resource demapping stage in the access node. ### Claim 2 (depends on 1) The access node of claim 1, wherein the exchange of communication parameters with the neighboring access node is conducted via a central entity in the wireless communication network. ### Claim 3 (depends on 1) The access node of claim 1, wherein the exchange of communication parameters with the neighboring access node is conducted in response to receiving the assistance request from the neighboring access node. ### Claim 4 (depends on 1) The access node of claim 1, wherein the communication parameters include at least one of a hopping sequence indication and a reference signal indication. ### Claim 5 (depends on 1) The access node of claim 1, wherein the resource information sent to the neighboring access node includes an expected reference signal indication that is associated with the received signal. ### Claim 6 (depends on 1) The access node of claim 1, wherein the resource demapping stage is a stage of receiver processing occurring after an FFT processing stage. ### Claim 7 (depends on 1) The access node of claim 1, wherein the access node stores information associated with the received signal in the memory, and then derives the resource information based on the stored information in response to the assistance request. ### Claim 8 (depends on 7) The access node of claim 7, wherein the access node deletes the stored information after expiration of a predetermined time. ### Claim 9 (depends on 7) The access node of claim 7, wherein the access node deletes the stored information after the stored information is used to derive the resource information. ### Claim 10 A method for an access node in a wireless communication network to provide interference resolution assistance to a neighboring access node, the method comprising the steps of: exchanging, via a backhaul transceiver, communication parameters with the neighboring access node; receiving, via a transceiver module, a signal comprising a non-interfering transmission and an interfering transmission; receiving, via the backhaul transceiver, an assistance request from the neighboring access node, the assistance request including an identification of a plurality of uplink resources; and sending, via the backhaul transceiver and in response to the assistance request, resource information to the neighboring access node, wherein the resource information is associated with the signal which is received over the identified plurality of uplink resources and is obtained from a resource demapping stage in the access node. ### Claim 11 (depends on 10) The method of claim 10, wherein the step of exchanging communication parameters with the neighboring access node is conducted via a central entity in the wireless communication network. ### Claim 12 (depends on 10) The method of claim 10, wherein the step of exchanging communication parameters with the neighboring access node is conducted in response to receiving the assistance request from the neighboring access node. ### Claim 13 (depends on 10) The method of claim 10, wherein the communication parameters include at least one of a hopping sequence indication and a reference signal indication. ### Claim 14 (depends on 10) The method of claim 10, wherein the resource information sent to the neighboring access node includes an expected reference signal indication that is associated with the received signal. ### Claim 15 (depends on 10) The method of claim 10, wherein the resource demapping stage is a stage of receiver processing occurring after an FFT processing stage. ### Claim 16 (depends on 10) The method of claim 10, wherein the access node stores information associated with the received signal in the memory, and then derives the resource information based on the stored information in response to the assistance request. ### Claim 17 (depends on 16) The method of claim 16, wherein the access node deletes the stored information after expiration of a predetermined time. ### Claim 18 (depends on 16) The method of claim 16, wherein the access node deletes the stored information after the stored information is used to derive the resource information. ### Claim 19 An access node in a wireless communication network, the access node providing interference resolution assistance to a neighboring access node, the access node comprising: a transceiver module configured to receive and send data via the wireless communication network; a backhaul transceiver configured to receive and send data via a backhaul communication link; a memory; and a processor coupled to the transceiver module, the backhaul transceiver and the memory and configured to: exchange, via the backhaul transceiver, communication parameters with the neighboring access node, receive, via the transceiver module, a signal comprising a non-interfering transmission and an interfering transmission, receive, via the backhaul transceiver, an assistance request from the neighboring access node, the assistance request including an identification of a plurality of uplink resources, send, via the backhaul transceiver and in response to the assistance request, resource information to the neighboring access node, wherein the resource information is associated with the signal which is received over the identified plurality of uplink resources, store, in the memory, information associated with the signal, derive the resource information based on the stored information in response to receiving the assistance request, and delete the stored information after expiration of a predetermined time or after the stored information is used to derive the resource information.