Rules for interference mitigation coordination
Certain aspects of the present disclosure provide techniques for wireless communication by a first wireless node, comprising detecting cross link interference (CLI) between the first wireless node and a second wireless node, determining whether the first wireless node or the second wireless node is to take action to mitigate CLI based on one or more rules and taking one or more actions to mitigate CLI when the determination is that the first wireless node is to take action to mitigate CLI.
1 . A method for wireless communication by a first wireless node, comprising:
detecting cross link interference (CLI) between the first wireless node and a second wireless node;
determining whether to take one or more actions to mitigate the CLI based on one or more rules, wherein:
the one or more rules dictate:
which one of the first wireless node or the second wireless node is required to take the one or more actions to mitigate the CLI; and
which one of the first wireless node or the second wireless node is not required to take the one or more actions to mitigate the CLI;
the one or more rules comprise a rule that dictates that the one of the first wireless node or the second wireless node that is required to take the one or more actions to mitigate the CLI is to be determined based on at least one of a comparison of a cell identifiers (cell IDs) or physical cell identifiers (PCIs) of the first wireless node and the second wireless node or priorities of the first wireless node and the second wireless node, when the first wireless node and the second wireless node are both configured with a flexible symbol and neither the first wireless node nor the second wireless node has received a slot format indicator (SFI) indicating its flexible symbol is an uplink symbol or a downlink;
the first wireless node and the second wireless node are associated with different network operators sharing a same spectrum;
taking the one or more actions to mitigate the CLI when the determination is that the first wireless node is to take the one or more actions to mitigate the CLI.
2 . The method of claim 1 , wherein the CLI is detected, by the first wireless node, based on measurements of reference signals (RSs) transmitted by the second wireless node.
3 . The method of claim 2 , further comprising transmitting, to the second wireless node, an indication of the detected CLI.
4 . The method of claim 1 , wherein the CLI is detected, by the first wireless node, based on:
an indication, received from the second wireless node, that the second wireless node detected CLI based on measurements of reference signals (RSs) transmitted by the first wireless node.
5 . The method of claim 1 , wherein:
the first wireless node and the second wireless node comprise a first base station and a second base station; and
the one or more actions comprise at least one of restricting uplink reception by the first wireless node or restricting downlink transmission by the first wireless node.
6 . The method of claim 1 , wherein:
the first wireless node comprises a first user equipment (UE) served by a first base station; and
the second wireless node comprises a second UE served by a second base station.
7 . The method of claim 1 , wherein the one or more rules comprise a rule that dictates that:
the first wireless node is to take the one or more actions to mitigate the CLI when the first wireless node is configured with a flexible symbol and the second wireless node is configured with an uplink symbol or a downlink symbol.
8 . The method of claim 7 , wherein the one or more rules comprise at least one of:
a first rule that dictates that the first wireless node is to refrain from transmission during the flexible symbol when the second wireless node is configured with a downlink symbol; or
a second rule that dictates that the first wireless node is to refrain from reception during the flexible symbol when the second wireless node is configured with an uplink symbol.
9 . The method of claim 1 , wherein the one or more rules comprise a rule that dictates that the one of the first wireless node or second wireless node that is required to take the one or more actions to mitigate the CLI is to be determined based on a comparison of a cell identifiers (cell IDs) or physical cell identifiers (PCIs) of the first wireless node and the second wireless node when:
the first wireless node is configured with a flexible symbol and the second wireless node is configured with an uplink symbol or a downlink symbol;
the second wireless node is configured with a flexible symbol and the first wireless node is configured with an uplink symbol or a downlink symbol;
the first wireless node is configured with an uplink symbol and the second wireless node is configured with a downlink symbol;
the first wireless node is configured with a downlink symbol and the second wireless node is configured with an uplink symbol; or
the first wireless node and second wireless node are both configured with flexible symbols.
10 . The method of claim 1 , wherein the one or more rules comprise a rule that dictates that the one of the first wireless node or the second wireless node that is required to take the one or more actions to mitigate the CLI is to be determined based on priorities of the first wireless node and the second wireless node when:
the first wireless node is configured with a flexible symbol and the second wireless node is configured with an uplink symbol or a downlink symbol;
the second wireless node is configured with a flexible symbol and the first wireless node is configured with an uplink symbol or a downlink symbol;
the first wireless node is configured with an uplink symbol and the second wireless node is configured with a downlink symbol;
the first wireless node is configured with a downlink symbol and the second wireless node is configured with an uplink symbol; or
the first wireless node and second wireless node are both configured with flexible symbols.
11 . The method of claim 10 , wherein:
one of the first wireless node or second wireless node comprises a distributed unit (DU) and the other of the first wireless node or second wireless node comprises a central unit (CU); and
the priorities are pre-configured or randomly generated by the DU or the CU.
12 . The method of claim 1 , wherein the one or more rules comprise a rule that dictates that, when the first wireless node and second wireless node are both configured with a flexible symbol:
the first wireless node is required to take the one or more actions to mitigate the CLI when the second wireless node has received a slot format indicator (SFI) indicating its flexible symbol is an uplink symbol or a downlink symbol and the first wireless node has not received an SFI indicating its flexible symbol is an uplink symbol or a downlink.
13 . The method of claim 1 , wherein the one or more rules are defined in a standard specification.
14 . The method of claim 1 , wherein the one or more rules are based on a recommendation or indication from the second wireless node.
15 . The method of claim 1 , further comprising transmitting to the second wireless node a recommendation or indication regarding the one or more rules.
16 . A method for wireless communication by a first wireless node, comprising:
detecting cross link interference (CLI) between the first wireless node and a second wireless node;
determining, when the first wireless node and the second wireless node are both configured with a flexible symbol and neither the first wireless node nor the second wireless node has received a slot format indicator (SFI) indicating its flexible symbol is an uplink symbol or a downlink, whether to take one or more actions to mitigate the CLI based on a comparison of cell identifiers (cell IDs) or physical cell identifiers (PCIs) of the first and second wireless nodes, wherein:
the comparison of the cell IDs or the PCIs dictates:
which one of the first wireless node or the second wireless node is required to take the one or more actions to mitigate the CLI; and
which one of the first wireless node or the second wireless node is not required to take the one or more actions to mitigate the CLI; and
the first wireless node and the second wireless node are associated with different network operators sharing a same spectrum; and
taking the one or more actions to mitigate the CLI when the determination is that the first wireless node is to take the one or more actions to mitigate the CLI.
17 . A method for wireless communication by a first wireless node, comprising:
detecting cross link interference (CLI) between the first wireless node and a second wireless node;
determining, when the first wireless node and the second wireless node are both configured with a flexible symbol and neither the first wireless node nor the second wireless node has received a slot format indicator (SFI) indicating its flexible symbol is an uplink symbol or a downlink, whether the first wireless node or the second wireless node is required to take one or more actions to mitigate CLI based on configured priorities for the first and second wireless nodes, wherein;
the configured priorities dictate:
which one of the first wireless node or the second wireless node is required to take the one or more actions to mitigate the CLI; and
which one of the first wireless node or the second wireless node is not required to take the one or more actions to mitigate the CLI; and
the first wireless node and the second wireless node are associated with different network operators sharing a same spectrum; and
taking one or more actions to mitigate the CLI when the determination is that the first wireless node is to take action to mitigate the CLI.
18 . The method of claim 17 , wherein:
one of the first wireless node or second wireless node comprises a distributed unit (DU) and the other of the first wireless node or second wireless node comprises a central unit (CU); and
the priorities are pre-configured or randomly generated by the DU or the CU.