Wireless Node Sidelink Resource Allocation via Spatial Beam Segmentation
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Solution Overview
Problem
The 5G NR system faces challenges with fragmentary uplink and downlink resource configurations, which restrict sidelink transmission resources, making it difficult for D2D/V2X traffics to access contiguous uplink resources and reduce transmission opportunities.
Innovation Solution
A method that connects time-domain resources with spatial-domain resources by indicating a first symbol set and a second symbol set, where each multicarrier symbol corresponds to either downlink or uplink symbols, allowing sidelink transmissions in specific beam directions, thus expanding resource availability without affecting existing systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible configurations of subcarrier spacings and slot formats are introduced in NR system, then uplink and downlink resource flexibility is improved, but contiguity of uplink resources for D2D/V2X transmission deteriorates
Solution Approach 1:
The patent introduces spatial domain (beam direction) as an additional dimension to resource allocation. Instead of only considering time-domain contiguity, the system combines time-domain symbol sets with spatial-domain beam directions to form three-dimensional resource blocks. This allows D2D/V2X traffic to access resources that are fragmented in time but contiguous in space-time-beam dimension, resolving the contradiction between flexibility and contiguity.
Solution Approach 2:
The patent makes downlink symbols serve multiple functions: traditional downlink communication and sidelink transmission via spatially orthogonal beams. By indicating a first spatial Rx parameter group associated with the first symbol set, the system enables downlink symbols to function as uplink resources for D2D/V2X traffic when accessed through specific beam directions, thereby expanding available contiguous resources without requiring separate time slots.
2Productivity
If downlink symbols are used for sidelink transmission through spatially orthogonal beams, then sidelink transmission opportunities are improved, but downlink communication reliability may deteriorate
Solution Approach 1:
The patent segments the resource allocation by introducing explicit indication information that specifies which spatial Rx parameter group is associated with which symbol set. This segmentation allows the system to distinguish between resources intended for downlink communication and those intended for sidelink transmission, enabling reliable resource management and preventing interference between the two functions.
Solution Approach 2:
The patent introduces spatial Rx parameter group indication as an intermediary mechanism between the time-domain symbol allocation and the actual transmission function. This intermediary layer (the spatial parameter group indication) mediates between the need to use downlink symbols for sidelink transmission and the need to maintain downlink communication reliability by clearly identifying which resources are available for which purpose.
Data Source
AI summary
The present disclosure discloses a method and a device in a node for wireless communications. A first node receives a first signaling, the first signaling being used for indicating a first time unit format; and transmits first information and second information; herein, the first information is used for indicating a first symbol set and a second symbol set; the first symbol set and the second symbol set respectively comprise a positive integer number of multicarrier symbol(s); each multicarrier symbol in the first symbol set corresponds to first-type symbols in the first time unit format, while each multicarrier symbol in the second symbol set corresponds to second-type symbols in the first time unit format; each of the first-type symbols comprises (a) downlink symbol(s), while each of the second-type symbols comprises (an) uplink symbol(s). The present disclosure expands access to transmission resources for sidelink.