Sidelink Search Space Configuration for IoT PLC Resource Management
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing resources for sidelink communications between sensors/actuators (SAs) and programmable logic controllers (PLCs) in IoT applications, leading to increased processing power and bandwidth usage due to the need for blind decoding of multiple subchannels.
Innovation Solution
The proposed solution involves configuring a search space for sidelink communications based on a hashing function that utilizes a portion of resources allocated or reserved within the PLC subnetwork from the sidelink resource pool, thereby reducing the number of subchannels that need to be blindly decoded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blind decoding of multiple subchannels is performed to ensure reliable sidelink communication, then communication reliability is improved, but processing power and bandwidth consumption increase
Solution Approach 1:
The patent segments the sidelink resource pool into multiple subchannels and further divides the blind decoding process into two stages: first decoding control information in the first set of subchannels to obtain resource allocation information, then using this information to guide decoding in the second set of subchannels. This segmentation reduces the complexity of blind decoding while maintaining communication reliability.
Solution Approach 2:
The patent performs preliminary decoding of control information in the first set of subchannels before attempting to decode data in the second set of subchannels. This preliminary action provides resource allocation information that guides the subsequent decoding process, reducing the need for complete blind decoding of all subchannels and thereby reducing processing power consumption.
2Reliability
If blind decoding of all subchannels is performed to ensure complete resource monitoring, then search completeness is improved, but hardware resource consumption increases
Solution Approach 1:
The patent segments the subchannels into two distinct sets: a first set for control information decoding and a second set for data transmission. This segmentation allows the receiver to first obtain resource allocation information from the first set, which then guides the decoding process for the second set, reducing the hardware resources needed for complete search.
Solution Approach 2:
The patent introduces control information as an intermediary element that mediates between the resource allocation and the actual data transmission. By first decoding this control information in the first set of subchannels, the receiver obtains the necessary guidance to efficiently decode the second set of subchannels, reducing the need for exhaustive blind decoding across all subchannels.
3Adaptability or versatility
If search space is configured to cover all available subchannels, then communication coverage is improved, but processing requirements increase
Solution Approach 1:
The patent dynamically configures the search space based on the decoded control information. Instead of a static search space covering all subchannels, the search space is adaptively adjusted according to the resource allocation information obtained from the first set of subchannels, allowing the receiver to focus processing resources on the most relevant subchannels for each communication scenario.
Data Source
AI summary
Aspects of the present disclosure provide techniques for configuring a search space for sidelink communications between one or more sensors/actuators (SAs) and programmable logic controller (PLC) in internet of things (IoT) applications in order to minimize the number of subchannels that a receiver (e.g., PLC or SA) may need to blind decode. More particularly, the search space is configurable based on a hashing function that is based in part on a portion of the resources (e.g., PLC resources) that have been allocated or reserved for sidelink communication within the PLC subnetwork (or PLC group) from the sidelink resource pool available to a plurality of PLCs in a network. By limiting the search space to a subset of resources that are specific to the PLC subnetwork or group, the need for the SA or PLC to perform blind decoding of sidelink control information (SCI) may be further reduced.