Group Random Access Signaling for Passive Backscatter Nodes
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently triggering random access procedures at passive devices, leading to increased overhead and energy consumption due to the need for individual signaling to activate multiple devices, which can result in inefficient network connections.
Innovation Solution
A framework is introduced for triggering random access procedures using control signaling, such as PDCCH orders, where a UE assists the network in activating passive devices by transmitting signals with specific parameters, and group control signaling is used to align active states of multiple active devices, reducing overhead and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual signaling is used to activate multiple passive devices, then each device can be activated reliably, but signaling overhead and energy consumption increase
Solution Approach 1:
The patent combines multiple individual device activation signals into a single group activation signal. The network node transmits one group RAR message that contains activation commands for multiple passive devices simultaneously, merging what would otherwise require multiple separate signaling operations into a single efficient transmission, thereby reducing both overhead and energy consumption while maintaining reliable activation of all targeted devices
Solution Approach 2:
The group Random Access Response (RAR) message serves multiple functions simultaneously: it activates multiple passive devices, provides uplink timing synchronization for all devices, and establishes group communication channels. This multi-functional approach eliminates the need for separate signaling procedures for each device, resolving the contradiction between reliable individual activation and efficient resource usage
2Ease of operation
If individual signaling is used to activate multiple passive devices, then each device receives specific parameters, but network overhead increases
Solution Approach 1:
The patent merges parameter configuration for multiple devices into a single group RAR message. Each device receives its specific parameters (such as uplink timing, frequency offsets, and resource allocations) within this consolidated message structure, eliminating the need for multiple separate RAR messages and significantly reducing the quantity of signaling overhead while maintaining ease of parameter configuration for each device
Solution Approach 2:
The group RAR message is segmented to contain individual parameter sets for each targeted passive device, allowing each device to extract and apply its specific parameters from the unified message. This segmentation approach enables efficient parameter distribution to multiple devices without requiring separate signaling transactions for each device, thus reducing overall network overhead
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces overhead and energy consumption while enabling efficient network connections by allowing coordinated activation of passive and active devices, enhancing throughput and data rates.
Implementation Method 1
one or more passive network nodes that support backscatter communication with the first network node
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A first network node may transmit control signaling to a second work node, which may indicate a grant of one or more resources and one or more parameters associated with a random access procedure to be performed at one or more passive network nodes that support backscatter communication. The second network node may transmit, in the one or more resources, a signal to activate the one or more passive network nodes. The second node may transmit command information to the one or more passive network nodes that may indicate the one or more parameters for the random access procedure. The first network node may transmit group control signaling to multiple energy harvesting network nodes. In such examples, the group control signaling may indicate a request for the multiple energy harvesting network nodes to perform a random access procedure.