5G UE Slot Determination via Spatial Direction Indication
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Solution Overview
Problem
In 5G New Radio (NR) systems, User Equipment (UE) faces difficulty in determining the beam direction of channels occupied by the base station, leading to inefficient channel sharing and reduced channel occupancy rates due to non-omnidirectional beam transmission.
Innovation Solution
The method involves receiving a slot format indication index and spatial direction information from the base station through a physical downlink control channel (PDCCH), allowing the UE to determine the spatial directions and slots occupied by the base station in each direction, using indication signals and high-level signaling to establish corresponding relationships.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If non-omnidirectional beam transmission is used in NR system, then transmission directionality and spatial reuse are improved, but UE cannot determine beam direction leading to reduced channel sharing efficiency
Solution Approach 1:
The patent uses indication signals as intermediaries to convey beam direction information from the base station to the UE. These signals carry spatial reception parameters that enable the UE to determine the beam directions without directly transmitting beam direction data, thus resolving the information loss problem while maintaining directional transmission benefits
Solution Approach 2:
The patent changes the parameter representation by using spatial reception parameters in indication signals to represent beam directions. Instead of directly indicating beam directions, the system uses parameters that describe signal reception characteristics, which implicitly convey spatial information to the UE
2Reliability
If channel occupation durations are extended for different priorities, then channel access fairness is improved, but channel sharing efficiency deteriorates due to lack of spatial direction awareness
Solution Approach 1:
The patent adds a spatial dimension to channel sharing by determining occupied slots in multiple spatial directions separately. This allows the system to maintain different channel occupation durations for different priorities while simultaneously improving sharing efficiency through spatial awareness, effectively adding a new dimension to resolve the contradiction
Data Source
AI summary
A method and device for determining occupied slots, a storage medium, and a user equipment. The method comprises: receiving a slot format indication index and a number N of slots indicated by a slot format from a base station by means of a PDCCH, and according to the slot format indication index, determining a starting position in the PDCCH of the slots indicated by the slot format; receiving a number M of spatial directions from the base station, and receiving multiple indication signals transmitted from the M spatial directions from the base station; determining the M spatial directions according to the indication signals; and in the M spatial directions, determining slots occupied by the base station in each spatial direction according to the starting position in the PDCCH of the slots indicated by the slot format and the number N of the slots indicated by the slot format.