Half-Duplex Subframe Configuration for Wireless Misalignment
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Solution Overview
Problem
Current half-duplex operation methods in wireless communication systems face challenges such as misalignment between base stations and user equipment regarding subframe usage, leading to inefficiencies and potential losses in communication, particularly in low-cost devices that do not require complex duplexer components.
Innovation Solution
The method involves determining and signaling a constrained configuration of reduced uplink and downlink subframes for user equipment, along with the inclusion of guard periods between different types of transmissions, to explicitly manage subframe usage and minimize misalignment, thereby enhancing resource management and battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If half-duplex operation is implemented to reduce device complexity and cost, then device complexity is reduced, but misalignment between base station and user equipment subframe usage occurs
Solution Approach 1:
The base station determines a constrained configuration representing a reduced set of available uplink and downlink subframes before communication occurs and signals this configuration to the user equipment. This preliminary action ensures both parties are aligned on subframe usage beforehand, preventing misalignment issues during half-duplex operation while maintaining reduced device complexity
2Productivity
If a reduced set of subframes is used for half-duplex communication, then resource allocation efficiency is improved, but misalignment issues between base station and user equipment may occur
Solution Approach 1:
The base station signals the constrained configuration to the user equipment, creating a feedback mechanism where the reduced subframe configuration is communicated to ensure both parties use the same set of subframes. This maintains synchronization and prevents misalignment while achieving efficient resource allocation through the reduced subframe set
3Reliability
If guard periods are added between uplink and downlink subframes, then misalignment issues are reduced, but transmission time is increased
Solution Approach 1:
Guard periods are provided between certain uplink and downlink subframes rather than all subframes, applying the protective measure partially where needed to prevent misalignment issues while minimizing the overall time loss. This selective approach maintains transmission alignment reliability without excessively increasing total transmission time
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for enabling half-duplex (HD) operations between one or more user equipments (UEs) and one or more base stations.