Mitigating interference from wireless equipment
A first wireless access network node determines whether a first wireless equipment is potentially an interferer of wireless communication of a second wireless equipment in a domain of a second wireless access network node, where the first wireless equipment is in a domain of the first wireless access node. In response to determining that the first wireless equipment is potentially the interferer of the wireless communication of the second wireless equipment, configuration information is sent to the second wireless access network node to allow the second wireless access network node or the second wireless equipment to detect an interference from the first wireless equipment and to initiate performance of an interference mitigation procedure with respect to the interference from the first wireless equipment.
1. A method comprising:
determining, by a first wireless access network node, whether a first wireless equipment is potentially an interferer of wireless communication of a second wireless equipment in a domain of a second wireless access network node, wherein the first wireless equipment is in a domain of the first wireless access network node, and wherein the determining is based at least in part on whether the first wireless equipment is in a predefined proximity to the second wireless access network node or the second wireless equipment; and
in response to determining that the first wireless equipment is potentially the interferer of the wireless communication of the second wireless equipment, sending, by the first wireless access network node to the second wireless access network node, configuration information relating to a physical uplink control channel (PUCCH) format used by the first wireless equipment, to allow the second wireless access network node or the second wireless equipment to detect an interference from the first wireless equipment and to initiate performance of an interference mitigation procedure with respect to the interference from the first wireless equipment.
2. A method comprising:
determining, by a first wireless access network node, whether a first wireless equipment is potentially an interferer of wireless communication of a second wireless equipment in a domain of a second wireless access network node, wherein the first wireless equipment is in a domain of the first wireless access network node, and wherein the determining is based at least in part on whether the first wireless equipment is in a predefined proximity to the second wireless access network node or the second wireless equipment; and
in response to determining that the first wireless equipment is potentially the interferer of the wireless communication of the second wireless equipment, sending, by the first wireless access network node, configuration information to the second wireless access network node to allow the second wireless access network node or the second wireless equipment to detect an interference from the first wireless equipment and to initiate performance of an interference mitigation procedure with respect to the interference from the first wireless equipment, wherein the first wireless equipment is a first user equipment that performs device-to-device (D2D) wireless communication to another user equipment in the domain of the first wireless access network node, wherein the D2D wireless communication interferes with the second wireless equipment that is a user equipment in the domain of the second wireless access network node, and
wherein the configuration information relates to at least one control signaling characteristic of control signaling transmitted by the first wireless equipment, selected from among a control signal format, a signature or pattern of a control signal, and a type of information conveyed by a control signal.
3. The method of claim 1 , wherein sending the configuration information allows the second wireless access network node to cause monitoring of at least one output of the first wireless equipment to detect the interference from the first wireless equipment.
4. The method of claim 3 , wherein monitoring the at least one output comprises monitoring a control signal in a PUCCH according to the PUCCH format.
5. A method comprising:
determining, by a first wireless access network node, whether a first wireless equipment is potentially an interferer of wireless communication of a second wireless equipment in a domain of a second wireless access network node, wherein the first wireless equipment is in a domain of the first wireless access network node, and wherein the determining is based at least in part on whether the first wireless equipment is in a predefined proximity to the second wireless access network node or the second wireless equipment; and
in response to determining that the first wireless equipment is potentially the interferer of the wireless communication of the second wireless equipment, sending, by the first wireless access network node, configuration information to the second wireless access network node to allow the second wireless access network node or the second wireless equipment to detect an interference from the first wireless equipment and to initiate performance of an interference mitigation procedure with respect to the interference from the first wireless equipment, wherein the first or second wireless equipment is involved in a device-to-device (D2D) wireless communication or a communication of a relay node, and
wherein the configuration information relates to at least one control signaling characteristic of control signaling transmitted by the first wireless equipment, selected from among a control signal format, a signature or pattern of a control signal, and a type of information conveyed by a control signal.
6. The method of claim 5 , wherein the first wireless equipment is a first user equipment that performs wireless communication with the relay node in the domain of the first wireless access network node, wherein the wireless communication to the relay node interferes with the second wireless equipment that is a user equipment in the domain of the second wireless access network node.
7. The method of claim 5 , wherein the first wireless equipment is the relay node that performs wireless communication with the first wireless access network node that interferes with the second wireless equipment that is a user equipment in the domain of the second wireless access network node.
8. The method of claim 1 , wherein the first wireless equipment is a macro user equipment in the domain of the first wireless access network node, and the second wireless equipment is a pico user equipment in the domain of the second wireless access network node.
9. The method of claim 5 , wherein the first wireless equipment is a user equipment in the domain of the first wireless access network node, and the second wireless equipment is a user equipment that performs the D2D wireless communication in the domain of the second wireless access network node.
10. The method of claim 1 , wherein the first wireless equipment is a pico user equipment in the domain of the first wireless access network node, and the second wireless equipment is a macro user equipment that communicates with a relay node in the domain of the second wireless access network node.
11. The method of claim 1 , wherein the first wireless equipment is a macro user equipment or a relay node in the domain of the first wireless access network node, and the second wireless equipment is one of a macro user equipment that communicates with a relay node and a macro user equipment that performs device-to-device communication in the domain of the second wireless access network node.
12. The method of claim 1 , further comprising:
in response to the configuration information, causing, by the second wireless access network node or the second wireless equipment, monitoring of at least one output of the first wireless equipment to determine whether the first wireless equipment is an interferer with wireless communication of the second wireless equipment, wherein the monitoring is performed by the second wireless access network node, a user equipment, or a relay node.
13. The method of claim 1 , further comprising:
receiving, by the first wireless access network node, information indicating that the first wireless equipment is an interferer; and
performing, by the first wireless access network node, an action to mitigate interference caused by the first wireless equipment.
14. The method of claim 13 , wherein the action includes the first wireless access network node coordinating with the second wireless access network node to mitigate the interference caused by the first user equipment.
15. A first wireless access network node comprising:
a network interface to a second wireless access network node; and
at least one processor to:
determine whether a first wireless equipment served by the first wireless access network node is potentially an interferer of wireless communication of a second wireless equipment served by a second wireless access network node, wherein the determining is based at least in part on whether the first wireless equipment is in a predefined proximity to the second wireless access network node or the second wireless equipment; and
in response to determining that the first wireless equipment is potentially the interferer of the wireless communication of the second wireless equipment, send configuration information relating to a physical uplink control channel (PUCCH) format used by the first wireless equipment to the second wireless access network node to allow the second wireless access network node or the second wireless equipment to detect an interference from the first wireless equipment and to initiate performance of an interference mitigation procedure with respect to the interference from the first wireless equipment.
16. The first wireless access network node of claim 15 , wherein the at least one processor is to further:
receive an interfering report from the second wireless access network node that the first wireless equipment is the interferer, wherein the interfering report is sent by the second wireless access network node based on monitoring of output of the first wireless equipment.
17. The first wireless access network node of claim 16 , wherein the at least one processor is to further:
respond to the interfering report from the second wireless access network node by coordinating with the second wireless access network node to mitigate interference by the first wireless equipment.
18. The first wireless access network node of claim 17 , wherein the interfering report includes information selected from among an interference pattern based on the monitoring, and an identification of uplink resources assigned by the second wireless access network node to at least one wireless equipment served by the second wireless access network node.
19. The first wireless access network node of claim 16 , wherein the at least one processor is to further:
respond to the interfering report from the second wireless access network node by sending an interfering report response to the second wireless access network node, wherein the interfering report response includes an identification of uplink resources assigned by the first wireless access network node to at least one wireless equipment served by the first wireless access network node.
20. The method of claim 1 , wherein the configuration information relates to the PUCCH format for transmission of a scheduling request (SR) or channel quality indicator (CQI) by the first wireless equipment, the method further comprising:
receiving, by the first wireless access network node, information indicating that the first wireless equipment is an interferer, the information responsive to monitoring of the SR or the CQI by the second wireless access network node.
21. The method of claim 5 , wherein sending the configuration information allows the second wireless access network node to cause monitoring of at least one output of the first wireless equipment to detect an interference from the first wireless equipment, the at least one output comprises monitoring at least one selected from among a sounding reference signal (SRS), a random access channel (RACH), and a demodulation reference signal (DMRS).
22. The first wireless access network node of claim 15 , wherein the configuration information relates to the PUCCH format for transmission of a scheduling request (SR) or channel quality indicator (CQI) by the first wireless equipment, the at least one processor can further:
receive information indicating that the first wireless equipment is an interferer, the information responsive to monitoring of the SR or the CQI by the second wireless access network node.
23. The method of claim 2 , wherein the first user equipment is to perform the D2D wireless communication to the another user equipment by communicating directly with the another user equipment.
24. The method of claim 7 , wherein the relay node is to relay communication of a user equipment with the first wireless access network node.