One-to-Many Sidelink Scheduling With Spatial DCI Allocation
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing one-to-many sidelink communications, particularly in allocating resources and spatial transmission directions for multiple recipients, which can lead to inefficiencies and interference.
Innovation Solution
A method and apparatus for dynamic scheduling of one-to-many sidelink communications, where a user equipment (UE) transmits a buffer status report and receives downlink control information (DCI) messages from a base station to allocate resources for spatial transmission directions, enabling efficient sidelink communications with multiple recipients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional scheduling methods are used for one-to-many sidelink communications, then resource allocation is simple, but interference increases and spectral efficiency decreases
Solution Approach 1:
The patent segments the one-to-many sidelink communication into multiple one-to-one communication instances, each with its own DCI message and resource allocation. This allows independent optimization of each spatial direction while maintaining overall system coordination, thereby reducing interference between different recipient pairs.
Solution Approach 2:
The patent introduces spatial dimension by allocating different spatial transmission directions for different recipients through separate DCI messages. This dimensional separation in the spatial domain enables simultaneous communications to different UEs without causing mutual interference, thus resolving the interference problem.
2Productivity
If multiple DCI messages are used to allocate resources for each spatial transmission direction, then spectral efficiency improves, but control signaling overhead increases
Solution Approach 1:
The patent segments the resource allocation into multiple DCI messages, each targeting a specific spatial direction and recipient. This segmentation enables precise resource allocation for each communication instance, improving spectral efficiency by eliminating wasted resources while the segmented structure itself manages the signaling overhead through organized transmission.
Solution Approach 2:
The patent changes the parameter of resource allocation from a single unified allocation to multiple differentiated allocations based on spatial direction and recipient identity. This parameter change enables dynamic adaptation of resources to actual communication needs, improving spectral efficiency while the structured parameter changes are efficiently conveyed through DCI messages.
3Productivity
If dynamic scheduling is implemented for one-to-many sidelink communications, then resource allocation efficiency improves, but system complexity increases
Solution Approach 1:
The patent implements dynamic scheduling where DCI messages are transmitted at different times to schedule resources for different spatial directions. This dynamic approach allows the system to adapt resource allocation to real-time communication demands, improving resource allocation efficiency while the time-sequential nature of the dynamic scheduling manages system complexity.
Solution Approach 2:
The patent uses preliminary DCI messages to allocate resources before the actual sidelink transmissions occur. This preliminary action allows the system to prepare and coordinate multiple spatial directions in advance, improving resource allocation efficiency while the preparatory nature of the action organizes the complexity into manageable stages.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a base station, a buffer status report associated with a one-to-many sidelink communication. The UE may receive, from the base station, one or more downlink control information (DCI) messages scheduling one or more sidelink communications, associated with one or more spatial transmission directions, for the one-to-many sidelink communication, wherein the one or more DCI messages allocate resources for each of the one or more spatial transmission directions. The UE may transmit, using the resources and in the one or more spatial transmission directions, the one or more sidelink communications for the one-to-many sidelink communication. Numerous other aspects are described.