Sidelink Subchannel Allocation Using RB-Interlace in Unlicensed Bands

The patent applies parameter changes by introducing a new resource allocation scheme specifically tailored for unlicensed bands. It changes the frequency domain resource configuration parameters by defining subchannels as the basic unit for sidelink resource allocation, with each subchannel comprising multiple resource blocks (RBs). This parameter transformation enables efficient resource configuration adapted to unlicensed band characteristics, resolving the contradiction between providing sidelink communication functionality and achieving efficient resource configuration.

The patent applies segmentation by dividing the frequency domain resources into multiple subchannels, where each subchannel is independently configurable and can be autonomously selected by terminals. This segmentation allows terminals to have flexibility in choosing specific subchannels for sidelink communication while the network maintains overall resource pool configuration. The subchannel-level granularity enables both centralized management (network configures subchannel parameters) and terminal autonomy (terminals select specific subchannels), resolving the contradiction between centralized resource management and terminal flexibility.

The patent introduces subchannels as an intermediary layer between the network's resource pool configuration and terminal's autonomous selection. The network configures subchannel parameters (bandwidth, RB composition, frequency location) as intermediate structures, which then serve as building blocks for terminal autonomous resource selection. This intermediary subchannel structure simplifies terminal operations by providing pre-defined resource units to select from, while the network maintains control over the overall resource pool configuration, thereby reducing resource management complexity despite terminal autonomy.