D2D Configuration Frequency Indicator for Wireless Terminals
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Solution Overview
Problem
In wireless communication systems, especially in public safety networks, there is a challenge in configuring Device-to-Device (D2D) operations accurately, particularly when user equipment (UE) needs to perform D2D operations on frequencies other than the serving frequency, as current methods lack clarity on the frequency allocation for D2D resources, leading to ambiguity and potential reliability issues.
Innovation Solution
A method where a terminal in a wireless communication system receives a D2D configuration from a cell, which includes a frequency indicator, allowing it to perform D2D operations on a specific frequency, and the network configures resources capable of D2D communication, ensuring accurate frequency allocation and reducing ambiguity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the network configures only a resource capable of performing D2D operation without frequency indicator, then the configuration is simple, but the UE cannot know the frequency to which the resource is applied, leading to ambiguity and reliability issues
Solution Approach 1:
The patent introduces a frequency indicator as an intermediary element in the D2D configuration. This frequency indicator acts as a mediator that connects the D2D resource configuration to the specific frequency information, allowing the UE to unambiguously identify which frequency the D2D resource applies to. The frequency indicator resolves the ambiguity by providing explicit frequency mapping information without significantly increasing overall system complexity.
2Ease of operation
If the UE performs D2D operation only on current serving frequency, then the operation is straightforward, but the UE cannot perform D2D operation on other frequencies even when needed for public safety or network optimization
Solution Approach 1:
The patent implements a dynamic D2D configuration mechanism where the UE can be configured to perform D2D operations on different frequencies based on network needs. The network can dynamically assign D2D resources on serving frequency or other frequencies by providing appropriate frequency indicators in the configuration. This allows the system to adapt between simple same-frequency operations and more versatile cross-frequency operations as conditions require.
Solution Approach 2:
The patent changes the frequency parameter of D2D operations from being fixed to the serving frequency to being configurable to any frequency. By introducing the frequency indicator parameter in the D2D configuration, the system enables the frequency to be changed based on network requirements, whether for public safety applications or network optimization, while maintaining operational simplicity through standardized configuration procedures.
3Reliability
If the D2D configuration includes frequency indicator, then the frequency allocation is clear and reliable, but the configuration becomes more complex and requires additional signaling
Solution Approach 1:
The patent segments the D2D configuration into distinct components: the D2D resource configuration and the frequency indicator. This segmentation allows the frequency information to be separately specified and clearly associated with the D2D resources. The configuration can be delivered through existing signaling mechanisms, with the frequency indicator being a separate element that can be processed independently, reducing the overall complexity burden.
Data Source
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AI summary
Provided are a device-to-device (D2D) operation method performed by a terminal in a wireless communications system and a terminal using the same. The method comprises receiving a D2D setting from a cell, wherein the D2D setting comprises a frequency indicator indicating a frequency at which a terminal performs a D2D operation according to the D2D setting.