D2D Subframe Pool Allocation Using Time Resource Pattern
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing data transmission in Device-to-Device (D2D) communication, leading to interference and overhead issues due to the lack of effective resource allocation and synchronization in subframes.
Innovation Solution
A method is introduced where a user equipment determines a subframe pool for D2D data transmission using a Time Resource Pattern (TRP), ensuring only suitable subframes are used for D2D signal transmission and reception, minimizing interference by applying a bitmap to indicate specific subframes for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If D2D communication is introduced to reduce network overhead, then network overhead is reduced, but interference and collision between D2D terminals increases due to lack of effective resource allocation
Solution Approach 1:
The patent segments the available subframes into a subframe pool specifically for D2D data transmission, separating D2D resources from traditional cellular resources. This segmentation allows dedicated resource allocation for D2D communications, reducing interference with cellular traffic while enabling systematic resource management through TRP-based selection within the segmented pool.
Solution Approach 2:
The patent applies preliminary action by pre-determining a subframe pool for D2D transmissions and establishing TRP (Time Resource Pattern) rules before actual D2D communications occur. This preliminary resource configuration enables UEs to autonomously select transmission subframes without real-time network intervention, reducing network overhead while preventing interference through pre-planned resource separation.
2Productivity
If D2D data transmission is allowed in all subframes, then data transmission rate increases, but interference and collision between D2D terminals increases
Solution Approach 1:
The patent applies local quality by allowing D2D data transmission only in specific subframes selected from a predetermined subframe pool using TRP, rather than uniformly across all subframes. This localized resource allocation optimizes data transmission rates in selected subframes while minimizing interference and collision by excluding other subframes from D2D usage.
Solution Approach 2:
The patent implements periodic action through TRP (Time Resource Pattern), which periodically selects specific subframes from the subframe pool for D2D transmissions. This periodic selection pattern enables structured, rhythmical resource usage that maintains high data transmission rates in active subframes while providing regular interference-free intervals through the periodic exclusion of other subframes.
3Object-affected harmful factors
If effective resource allocation is implemented to reduce interference, then interference between D2D terminals is reduced, but device complexity increases due to subframe pool determination and TRP application
Solution Approach 1:
The patent applies self-service by enabling UEs to autonomously determine the subframe pool and apply TRP for D2D resource selection without continuous network control. This self-service mechanism reduces device complexity compared to centralized scheduling, as UEs independently execute pre-configured resource selection algorithms, thereby reducing interference through autonomous resource management.
Solution Approach 2:
The patent uses parameter changes by configuring the subframe pool and TRP parameters (such as subframe offsets, periods, and patterns) to optimize resource allocation. By adjusting these parameters, the system can dynamically control which subframes are available for D2D transmissions, reducing interference while managing device complexity through parameter-based control rather than complex procedural logic.
Data Source
AI summary
An embodiment of the present invention provides a method for transmitting device-to-device (D2D) data by a terminal in a wireless communication system, the method for transmitting the D2D data comprising the step of: determining a sub-frame pool for transmitting data, which is configured by only sub-frames capable of transmitting and receiving a D2D signal, among multiple sub-frames; determining a set of subframes to transmit D2D data by applying a time resource patter (TRP) to the sub-frame pool for transmitting the data; and transmitting D2D data in the set of the determined sub-frames.