Time Resource Grouping for D2D Signal Indication
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Solution Overview
Problem
In existing LTE communications systems, device-to-device proximity services face challenges where indication signals cannot accurately indicate the time resource occupied by data signals, leading to increased processing time and energy consumption for the receive end due to blind detection across all possible time resources.
Innovation Solution
The proposed solution involves user equipment obtaining time resource grouping information, sending an indication signal to specify one or more time resource numbers, and determining the time resources occupied by data signals within these groups, allowing for accurate indication and reduced energy consumption by eliminating the need for blind detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the indication signal uses implicit indication without time resource grouping, then the indication signal structure is simple, but the receive end cannot accurately determine time resources and must perform blind detection on all possible time resources
Solution Approach 1:
The patent segments time resources into N time resource groups and introduces time resource grouping information to explicitly indicate which groups contain data signals. This segmentation allows the receive end to narrow down the search space from all possible time resources to specific groups, reducing blind detection complexity while maintaining a relatively simple indication signal structure.
Solution Approach 2:
The patent adds a new dimension of indication by introducing time resource grouping information that works together with frequency resource indication. This multi-dimensional approach (frequency + time groups) enables more precise resource identification without significantly increasing the complexity of the indication signal, as the time group indication is added as a separate layer of information.
2Device complexity
If the indication signal uses implicit indication without time resource grouping, then the indication signal structure is simple, but the receive end consumes more electrical energy due to blind detection
Solution Approach 1:
By segmenting time resources into N groups and indicating specific groups through time resource grouping information, the patent reduces the number of time resources the receive end must monitor. This segmentation directly lowers electrical energy consumption by eliminating unnecessary blind detection operations on time resources that do not contain data signals.
3Device complexity
If the indication signal cannot accurately indicate time resources, then the indication mechanism is simple, but data signals from different user equipments always collide with each other
Solution Approach 1:
The patent segments time resources into N distinct groups and uses time resource grouping information to explicitly indicate which groups contain data signals from different user equipments. This segmentation enables precise time resource allocation and collision avoidance, as each user equipment can be assigned to different time groups or the receive end can accurately identify which groups to monitor, preventing signal collisions while maintaining a relatively simple indication mechanism.
4Device complexity
If the indication signal cannot accurately indicate time resources, then the indication mechanism is simple, but the receive end needs to perform blind detection on all possible time resources
Solution Approach 1:
By segmenting time resources into N groups and providing time resource grouping information in the indication signal, the patent transforms the detection process from searching all possible time resources to checking only specific indicated groups. This segmentation dramatically reduces the difficulty of time resource detection while keeping the indication mechanism relatively simple through the addition of group identification information.
Data Source
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AI summary
Embodiments of the present invention provide a data transmission method and user equipment. The method includes: obtaining, by first user equipment, time resource grouping information, where the time resource grouping information includes time resource numbers in N time resource groups, and N is a positive integer; sending, by the first user equipment, an indication signal, where the indication signal indicates one or more time resource numbers; determining, by the first user equipment according to the time resource grouping information and the one or more time resource numbers indicated by the indication signal, time resources occupied by a data signal in the N time resource groups; and sending, by the first user equipment, the data signal by using the time resources occupied by the data signal in the N time resource groups. In the embodiments of the present invention, energy consumption of a receive end can be reduced.