DTX Detection in Wireless Resource Allocation Signaling
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Solution Overview
Problem
In wireless communication systems, particularly in E-UTRAN or LTE, there is a risk of signaling errors in UL and DL resource allocation, leading to data loss and misinterpretation due to failures in UL and DL allocation tables (ATs), which existing technologies have not adequately addressed, resulting in errors such as missed ACK/NACK signals and incorrect resource usage.
Innovation Solution
The implementation of improved DTX detection techniques that utilize both shared and dedicated control resources, employing decision variables to accurately determine signal presence, thereby reducing the likelihood of UL data DTX detection failure and ensuring correct resource usage for control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional error detection methods are used in wireless communication systems, then the system complexity remains low, but the error detection capability is insufficient leading to data loss and misinterpretation
Solution Approach 1:
The patent segments the control signal transmission into two distinct resources: shared control resources and dedicated control resources. By dividing the detection process into separate detection mechanisms for each resource type, the system achieves more reliable error detection without creating a single overly complex detection mechanism. The UE performs separate DTX detection on shared resources and dedicated resources, then combines results to determine ACK/NACK status.
Solution Approach 2:
The patent introduces decision variables as intermediary elements that mediate between the raw detection results and the final ACK/NACK determination. These decision variables (first decision variable for shared resources, second decision variable for dedicated resources) serve as intermediate processing steps that enable reliable error detection while maintaining manageable system complexity through structured decision-making.
2Reliability
If DTX detection is performed only on dedicated control resources, then the detection process is simple, but the probability of DTX detection failure increases leading to misinterpretation of DTX as ACK
Solution Approach 1:
The patent merges the detection results from shared control resources and dedicated control resources to make the final ACK/NACK determination. By combining the first decision variable (from shared resources) and second decision variable (from dedicated resources) according to specific rules, the system achieves higher DTX detection accuracy than either resource could provide alone, while maintaining a systematic approach to managing the increased complexity.
3Reliability
If resource allocation signaling is transmitted without enhanced error detection, then the transmission overhead is low, but the error rate remains high at 1% - 5%
Solution Approach 1:
The patent implements preliminary DTX detection on shared control resources before the actual control signal transmission on dedicated resources. By performing this preliminary check using decision variables, the system can identify potential allocation failures early and prevent erroneous interpretations, thereby improving signaling reliability without requiring substantial additional overhead in the main control signal transmission.
Data Source
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AI summary
In one exemplary embodiment of the invention, a method including: determining whether first allocation information has been transmitted from a first device towards a second device in a wireless communication system (901 ); and transmitting a message including transmittal information and second allocation information from the first device towards the second device, wherein the transmittal information corresponds to the determined transmittal of the first allocation information (902). In another exemplary embodiment of the invention, a method including: detecting whether a first signal is received on a dedicated resource of a wireless communication system (501); detecting whether a second signal is received on a shared resource of the wireless communication system (502); and determining, based on a detection outcome for the first signal and a detection outcome for the second signal, whether at least one allocation has failed (503).