Uplink interference resolution in a wireless communication system
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.
1. An access node in a wireless communication network, the access node conducting interference resolution of a received signal, the access node comprising:
a transceiver module configured to receive and send data via the wireless communication network;
a backhaul module configured to receive and send data via a backhaul communication link;
a memory; and
a processor coupled to the transceiver module, the backhaul module and the memory and configured to:
identify at least one neighboring access node in the wireless communication network,
exchange, via the backhaul module, communication parameters with the at least one neighboring access node,
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,
receive, via the backhaul module, resource information from one or more of the at least one neighboring access node, the resource information corresponding to the plurality of uplink resources, and
apply the resource information for interference resolution of the received signal, the application of the resource information for interference resolution of the received signal including determining channel transfer function components based on the resource information received from the one or more neighboring access node and on the signal received by the access node.
2. The access node of claim 1 , wherein the exchange of communication parameters with the at least one neighboring access node is performed via a central entity in the wireless communication network.
3. The access node of claim 1 , wherein the communication parameters include at least one of a hopping sequence indication and a reference signal indication.
4. The access node of claim 1 , wherein the resource information received from the one or more neighboring access node corresponds to at least some of the plurality of uplink resources and is based on an uplink transmission as received by the one or more neighboring access node.
5. The access node of claim 4 , wherein the resource information received from the one or more neighboring access node further includes an expected reference signal indication that is associated with the uplink transmission received by the one or more neighboring access node.
6. The access node of claim 1 , wherein the resource information received from the one or more neighboring access node is obtained from a specified stage of receiver processing in the one or more neighboring access node.
7. The access node of claim 6 , wherein the specified stage of receiver processing is a resource demapping stage.
8. The access node of claim 6 , wherein the specified stage of receiver processing is a stage of receiver processing occurring after an FFT processing stage.
9. The access node of claim 1 , wherein the resource information is received from the one or more neighboring access node in response to an assistance request sent from the access node to the one or more neighboring access node.
10. The access node of claim 9 , wherein the assistance request is sent from the access node to the one or more neighboring access node if the access node determines that it is unable to decode the transmission from the first user equipment.
11. The access node of claim 1 , wherein the determined channel transfer function components are associated with the transmission from the first user equipment and with the interfering transmission from the second user equipment.
12. A system in a wireless communication network for conducting interference resolution of a received signal, the system comprising:
an access node; and
a neighboring access node;
wherein the access node comprises a transceiver module, a backhaul module, a memory and a processor configured to:
identify a neighboring access node in the wireless communication network,
exchange, via the backhaul module, communication parameters with the neighboring access node,
receive, via the transceiver module, a first signal comprising a transmission from a first user equipment and an interfering transmission from a second user equipment, the first signal being received over a plurality of uplink resources,
receive, via the backhaul module, resource information from the neighboring access node, the resource information being associated with the plurality of uplink resources, and
apply the resource information for interference resolution of the received first signal; and the application of the resource information for interference resolution of the received signal including determining channel transfer function components based on the resource information received from the one or more neighboring access node and on the signal received by the access node; and
wherein the neighboring access node comprises a transceiver module, a backhaul module, a memory and a processor configured to:
exchange, via the backhaul module, communication parameters with the access node,
receive, via the transceiver module, a second signal comprising a transmission from the second user equipment and an interfering transmission from the first user equipment,
receive, via the backhaul module, an assistance request from the access node, the assistance request including an identification of a plurality of uplink resources, and
send, via the backhaul module and in response to the assistance request, resource information to the access node, the resource information being associated with the second received signal in the identified plurality of uplink resources.
13. A method for interference resolution of a received signal by an access node in a wireless communication network, the method comprising the steps of:
identifying at least one neighboring access node in the wireless communication network;
exchanging, via a backhaul module, communication parameters with the at least one neighboring access node;
receiving, via a 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;
receiving, via the backhaul module, resource information from one or more of the at least one neighboring access node, the resource information corresponding to the plurality of uplink resources; and
applying the resource information for interference resolution of the received signal, applying the resource information for interference resolution of the received signal including determining channel transfer function components based on the resource information received from the one or more neighboring access node and on the signal received by the access node.
14. The method of claim 13 , wherein the step of exchanging communication parameters with the at least one neighboring access node is performed via a central entity in the wireless communication network.
15. The method of claim 13 , wherein the communication parameters include at least one of a hopping sequence indication and a reference signal indication.
16. The method of claim 13 , wherein the resource information received from the one or more neighboring access node corresponds to at least some of the plurality of uplink resources and is based on an uplink transmission as received by the one or more neighboring access node.
17. The method of claim 16 , wherein the resource information received from the one or more neighboring access node further includes an expected reference signal indication that is associated with the uplink transmission received by the one or more neighboring access node.
18. The method of claim 13 , wherein the resource information received from the one or more neighboring access node is obtained from a specified stage of receiver processing in the one or more neighboring access node.
19. The method of claim 18 , wherein the specified stage of receiver processing is a resource demapping stage.
20. The method of claim 18 , wherein the specified stage of receiver processing is a stage of receiver processing occurring after an FFT processing stage.
21. The method of claim 13 , wherein the method further includes the step of sending an assistance request from the access node to the one or more neighboring access node, and wherein the resource information is received from the one or more neighboring access node in response to the assistance request.
22. The method of claim 21 , wherein the assistance request is sent from the access node to the one or more neighboring access node if the access node determines that it is unable to decode the transmission from the first user equipment.
23. The method of claim 13 , wherein the determined channel transfer function components are associated with the transmission from the first user equipment and with the interfering transmission from the second user equipment.