Radio Node Grouping for BS-to-BS Interference Identification
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Solution Overview
Problem
In 5G wireless communication networks, identifying and mitigating atmospheric channel-driven interference between base stations is challenging due to the limited number of physical cell IDs, which are ambiguous and insufficient for large networks, leading to interference from distant nodes.
Innovation Solution
Introducing reference signaling that allows for the identification of interfering radio nodes by representing information through resources, structure, and sequence, enabling grouping of nodes with shared identities or schedules to determine interfering sources and adapt transmission behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If physical cell IDs are reused for distant cells to support large networks, then network scalability is improved, but interference identification becomes ambiguous
Solution Approach 1:
The patent segments the identification system into two parts: cell-level identification using physical cell IDs and network-node-level identification using node IDs. This allows physical cell IDs to be reused at the cell level while node IDs provide unambiguous identification at the network node level, resolving the ambiguity in interference identification.
Solution Approach 2:
The patent introduces an additional identification dimension by adding node IDs to the existing physical cell ID system. This creates a two-layer identification structure where physical cell IDs operate at the cell level and node IDs operate at the network node level, enabling precise interference source identification even when physical cell IDs are reused.
2Measurement precision
If reference signaling is introduced for node identification, then interference source identification is improved, but signaling overhead increases
Solution Approach 1:
The patent makes node IDs multi-functional by using them both for unambiguous network node identification and for interference mitigation through QoS parameter adjustment. This eliminates the need for separate signaling mechanisms, reducing overall signaling overhead while maintaining precise interference source identification.
Solution Approach 2:
The patent enables the node ID system to serve itself by using the same identification mechanism for both identification and interference mitigation purposes. The node ID is used to identify the interfering node and simultaneously to adjust QoS parameters for that node, reducing the need for additional signaling overhead.
3Measurement precision
If grouping nodes with same identity is implemented, then interference determination is improved, but network complexity increases
Solution Approach 1:
The patent merges the functions of interference identification and QoS management by grouping nodes with the same node ID. This allows the network to treat interfering nodes as a group, applying QoS adjustments to the entire group rather than individually, which simplifies network configuration while maintaining precise interference determination.
Solution Approach 2:
The patent applies grouping selectively only to nodes that are determined to be interfering nodes, rather than grouping all nodes in the network. This partial application of grouping reduces network configuration complexity while still achieving precise interference determination for the relevant nodes.
Data Source
AI summary
There is disclosed a method of operating a grouping node connected to a radio access network. The method includes grouping one or more radio nodes of the radio access network into one or more groups, wherein to each group there is associated one identity and/or a schedule of transmitting signaling an identity. The disclosure also pertains to related devices and methods.