Beam-Based Inter-Cell Interference Coordination in Large-Scale MIMO
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Solution Overview
Problem
In large-scale MIMO systems, existing inter-cell interference coordination methods are inefficient as they primarily focus on time-frequency resources, neglecting the spatial dimension, leading to adverse effects on communication efficiency due to enhanced inter-cell interference caused by beamforming.
Innovation Solution
A beam-based inter-cell interference coordination method where base stations determine conflicting beams and exchange scheduling information to allocate time-frequency resources, avoiding conflicts and reducing interference by scheduling beams rather than cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing inter-cell interference coordination methods based on time-frequency resource coordination are applied in large-scale MIMO systems, then the coordination mechanism can be implemented, but inter-cell interference is enhanced due to beamforming and spatial dimension is not utilized, resulting in adverse effects on communication efficiency
Solution Approach 1:
The patent introduces the spatial dimension into inter-cell interference coordination by implementing beam-based resource scheduling. Instead of coordinating only in time-frequency dimensions, the system now coordinates across three dimensions (time, frequency, and space), where beams are identified by spatial directions and interference coordination is performed by avoiding simultaneous transmission on conflicting beams between adjacent cells
Solution Approach 2:
The patent segments the cell-level coordination into beam-level coordination. Each cell's beam set is divided into individual beams that can be independently identified and coordinated. The beam mapping relationship between cells is segmented and managed separately, allowing precise control of interference at the beam level rather than affecting the entire cell
2Object-affected harmful factors
If beam-based resource scheduling coordination is implemented, then inter-cell interference is reduced by utilizing spatial dimension, but base station complexity increases due to beam management and coordination overhead
Solution Approach 1:
The patent uses beam mapping relationships as a form of information copying between cells. Each base station obtains the beam mapping relationship of adjacent cells through information exchange, creating a copy of the spatial configuration data. This copied information is then used to identify and avoid conflicting beams, reducing the need for complex real-time calculations at each base station
Solution Approach 2:
The patent introduces beam mapping relationships as an intermediary mechanism for interference coordination. Instead of direct complex interactions between base stations, the beam mapping relationships serve as an intermediate data structure that facilitates coordinated beam scheduling. This intermediary layer simplifies the coordination process by providing structured spatial information
Data Source
AI summary
The present disclosure relates to a base station device, a communication method, and a storage medium in a wireless communication system. There is provided a base station device, comprising a processing circuitry configured to: based on a conflicting beam list, determining that at least one conflicting beam is included in a set of transmitting beams to be used for downlink transmission from a local cell in a future specific period; in response to the determining, send beam scheduling information for the future specific period to a base station of an adjacent cell, the beam scheduling information including at least information on time-frequency resources allocated to the at least one conflicting beam by the local cell.