Downlink Common Burst Mini-Slots for Unicast Interference Reduction
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently utilizing mini-slots for unicast data transmission on the downlink common burst of a slot, particularly in LTE and NR technologies, which can lead to inefficiencies and interference.
Innovation Solution
The implementation of mini-slots within the downlink common burst of a slot for unicast data transmission, allowing for more precise scheduling and reduced interference by utilizing mini-slot structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional slot structures are used for downlink common burst transmission, then resource allocation is simple, but spectral efficiency is low and interference occurs
Solution Approach 1:
The downlink common burst is divided into multiple mini-slots, each capable of independent unicast data transmission. This segmentation allows more granular resource allocation, improving spectral efficiency by utilizing previously wasted time-frequency resources while maintaining manageable scheduling complexity through standardized mini-slot formats.
2Manufacturing precision
If mini-slots are introduced for unicast data transmission, then resource allocation precision improves, but system complexity increases
Solution Approach 1:
Different mini-slots within the downlink common burst can be configured with different properties (e.g., some for unicast, others for multicast/broadcast). This local differentiation allows precise resource allocation to match specific transmission requirements while avoiding unnecessary complexity in the overall system by maintaining standardized procedures for each mini-slot type.
3Productivity
If downlink common burst is used for multiple purposes, then resource utilization improves, but interference increases
Solution Approach 1:
The downlink common burst is segmented into multiple mini-slots with distinct functions. Unicast data transmission occurs in dedicated mini-slots separated from multicast/broadcast mini-slots by guard periods. This temporal and spatial segmentation reduces interference between different transmission types while maintaining high overall resource utilization.
Solution Approach 2:
Guard periods are introduced as intermediary elements between different types of mini-slots (unicast and multicast/broadcast). These guard periods act as buffers that prevent interference between simultaneous transmissions, enabling the system to utilize the downlink common burst for multiple purposes without significant interference.
Data Source
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AI summary
A method, an apparatus, and a computer program product for wireless communication are provided. The method, performed by a user equipment (UE), comprises: receiving control information in a downlink in a control portion of the slot, which further comprising a data portion; receiving data in the data portion; and demodulating the data based on a demodulation reference signal (DMRS) in the control portion or based on the DMRS in the data portion of the slot, according to signaling between a base station and the UE.