D2D Activity State Control for Wireless Device Transmission
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Solution Overview
Problem
Current wireless communication networks lack the ability to control the network activity state of receiving or target Device-to-Device (D2D) UE, which can result in missed D2D transmissions due to unadjusted D2D activity states.
Innovation Solution
A method and apparatus that allow network nodes to identify target D2D UEs and adjust their activity states to ensure they can receive critical D2D transmissions by determining and controlling the D2D activity state of these UEs, particularly through adjusting DRX configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If DRX mode is used to conserve battery power in D2D-capable wireless devices, then energy consumption is reduced, but the device may miss critical D2D transmissions when in sleep mode
Solution Approach 1:
The patent applies dynamics by making the DRX configuration adjustable and adaptable based on D2D communication requirements. The network can dynamically modify DRX parameters (such as cycle length, on-duration, and offset) to balance between power saving and reliable reception of D2D transmissions, allowing the system to transition between different operational states based on real-time needs
Solution Approach 2:
The patent utilizes parameter changes by modifying DRX configuration parameters (cycle length, on-duration timer, offset values) to optimize both power consumption and transmission reliability. The network can adjust these parameters based on D2D service requirements, traffic patterns, and device states to achieve the desired balance between energy efficiency and communication reliability
2Reliability
If the network controls D2D activity state adjustments, then transmission reliability is improved, but network complexity and control overhead increase
Solution Approach 1:
The patent employs an intermediary approach by introducing a dedicated D2D activity state control mechanism within the network architecture. This control mechanism acts as an intermediary layer that coordinates between the network core and D2D devices, managing activity states through standardized signaling procedures that reduce overall system complexity while maintaining reliable transmission control
Solution Approach 2:
The patent applies segmentation by separating D2D activity state control into distinct functional components: identification of target devices, determination of appropriate activity states, and transmission of control signaling. This modular approach allows each component to be optimized independently and simplifies the overall control architecture by dividing complex control functions into manageable segments
3Duration of action of stationary object
If D2D devices operate in idle state with extended DRX cycles, then battery life is extended, but response time to receive D2D transmissions increases
Solution Approach 1:
The patent applies preliminary action by having the network pre-configure DRX parameters and pre-identify devices that may need to receive D2D transmissions. Before actual D2D communication occurs, the network can prepare appropriate activity state configurations and notify devices in advance, allowing them to wake up at optimal times without extending DRX cycles excessively, thus maintaining both battery efficiency and responsive timing
Data Source
AI summary
According to the teachings herein, network and device methods and apparatuses provide Device-to-Device, D2D, activity state control of a first wireless device with respect to a current or pending D2D transmission by a second device. In an example application, the teachings herein disclose a wireless communication network advantageously adjusting the D2D activity state of a given wireless device, to enable it to receive critical or otherwise desired D2D transmissions by another device, where such transmissions might otherwise be missed if D2D operation by the given wireless device continued according to the unadjusted D2D activity state.