D2D Downlink Control Information Resource Derivation
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Solution Overview
Problem
In wireless communication systems, there is a challenge in configuring downlink control information for Device-to-Device (D2D) communication due to the large amount of control information required for scheduling and data transmission, leading to a heavy signaling burden.
Innovation Solution
A method is introduced where downlink control information for D2D communication includes Physical Sidelink Shared Channel (PSSCH) resource allocation information for data transmission and Physical Sidelink Control Channel (PSCCH) resource allocation derived from PSSCH, enabling efficient scheduling and data transmission between D2D transmission and reception UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate downlink control information formats are used for scheduling assignment and D2D direct communication data transmission, then each can be scheduled independently, but the signaling burden increases heavily
Solution Approach 1:
The patent combines scheduling assignment and D2D direct communication data transmission into a single downlink control information format. This merging allows both types of information to be transmitted together in one control message, reducing the total signaling overhead while maintaining the ability to schedule both functions independently through distinct field configurations within the unified format.
Solution Approach 2:
The downlink control information format is designed to serve multiple functions simultaneously - it can schedule scheduling assignments, schedule D2D direct communication data transmissions, or both together. This multi-functional design eliminates the need for separate specialized formats, reducing signaling burden while preserving scheduling flexibility.
2Quantity of substance
If a single downlink control information format is used for both scheduling assignment and D2D direct communication data transmission, then the signaling burden is reduced, but the control information becomes too large to configure
Solution Approach 1:
The unified downlink control information format is segmented into distinct functional fields - one set of fields for scheduling assignment parameters and another set for D2D direct communication data transmission parameters. This segmentation allows the large control information to be organized into manageable, independently configurable sections, reducing the complexity of configuration while maintaining the benefits of a unified format.
Solution Approach 2:
The control information format employs dynamic field activation where only the necessary fields are configured and transmitted based on the current scheduling requirements. If only scheduling assignment is needed, only those fields are populated; if D2D data transmission is also needed, the additional fields are activated. This dynamic approach keeps the effective control information size manageable while preserving the capability to handle all combinations.
Data Source
AI summary
A method of transmitting and receiving downlink control information in a wireless communication system that supports communication between terminals and a device for the same are provided. Specifically, a method of receiving downlink control information in a wireless communication system that supports Device-to-Device (D2D) communication includes: receiving, by a terminal, downlink control information for D2D communication from a base station, wherein the downlink control information includes a Physical Sidelink Shared Channel (PSSCH) resource allocation information for D2D data transmission, and a Physical Sidelink Control Channel (PSCCH) resource for D2D control information transmission is derived from the PSSCH resource allocation information.