Dynamic TDD Interference Suppression via Control Channel Coordination
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Solution Overview
Problem
Current wireless communication systems face interference issues between uplink and downlink signals due to static resource configuration in LTE networks, leading to base station-to-base station and UE-to-UE interference, which existing solutions fail to adequately address.
Innovation Solution
A method where a base station determines control channel indication information about neighboring cells and sends it to adjacent base stations or user equipment, allowing for resource cooperation to stagger uplink and downlink signals, thereby reducing contradirectional-transmission interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic TDD is implemented to allow flexible adjustment of uplink-downlink timeslot configuration, then resource allocation flexibility is improved, but base station-to-base station interference and UE-to-UE interference are generated
Solution Approach 1:
The patent implements dynamic TDD by allowing each base station to flexibly adjust its uplink-downlink timeslot configuration based on service volume requirements. This enables the system to adapt resource allocation dynamically rather than using static configuration, resolving the contradiction by making the system configurable rather than fixed.
Solution Approach 2:
The patent introduces an interference coordination mechanism where base stations exchange control channel indication information about contradirectional transmission. This intermediary information exchange allows base stations to coordinate their resource allocation to avoid generating interference, thus resolving the harmful effects of dynamic TDD while maintaining its flexibility benefits.
2Object-generated harmful factors
If control channel indication information is exchanged between base stations to coordinate resources, then interference suppression is improved, but system complexity increases
Solution Approach 1:
The patent extracts and identifies specific control channel resources that are prone to interference (contradirectional transmission resources) and handles them separately through coordination. By focusing only on the problematic resources rather than coordinating all resources, the system reduces the complexity of interference coordination while maintaining effective suppression.
Solution Approach 2:
The patent changes the parameter being coordinated from general resource allocation to specific control channel indication information about contradirectional transmission. This parameter change simplifies the coordination process by focusing on the critical interference-prone elements rather than managing all resource parameters.
Data Source
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AI summary
Embodiments of the present invention provide an interference suppression method, apparatus, and system, to suppress interference between an uplink signal and a downlink signal, and improve communication quality. The method includes: determining, by a first base station, control channel indication information of a first cell, where the first cell is any one of cells managed by the first base station, and the control channel indication information includes at least one piece of the following information: control channel indication information of a contradirectional-transmission frequency band on which the first cell is interfered with by a neighboring cell, or control channel indication information of a contradirectional-transmission sub frame in which the first cell is interfered with by a neighboring cell; and sending, by the first base station, the control channel indication information to a second base station, where the second base station is a base station of the neighboring cell. The present invention is applicable to the wireless communications field.