D2D Control Signaling Overhead Reduction via Cluster Identifier
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Solution Overview
Problem
In Device-to-Device (D2D) communications, existing resource indication methods require extra control signaling for terminals to learn resource locations for receiving data, increasing overhead, especially in high-data-rate scenarios like high-definition video transmission.
Innovation Solution
A method where a first node receives control signaling with an indication identifier and resource indication information, allowing it to determine whether to receive or send data on a resource, reducing the need for additional signaling by using a cluster identifier to coordinate resource allocation among multiple nodes within a cluster.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If extra control signaling is used to notify the terminal that receives data on downlink of resource location, then the terminal can learn resource location for receiving data, but overhead of control signaling increases
Solution Approach 1:
The control signaling is designed to serve multiple functions simultaneously: it enables both transmitting terminals to send data and receiving terminals to receive data on the same resource. The resource indication information, when combined with cluster identifier comparison, universally indicates resource allocation for all terminals in the cluster without requiring separate signaling for different terminal types.
Solution Approach 2:
Terminals autonomously determine their role (transmitting or receiving) by comparing their own identifiers with the cluster identifier in the control signaling. This self-service mechanism eliminates the need for explicit role assignment signaling, as terminals independently derive their operational mode from the resource indication information and cluster identifier.
2Reliability
If separate control signaling is sent to transmitting and receiving terminals, then resource allocation can be precisely controlled, but device complexity and signaling overhead increase
Solution Approach 1:
The patent merges the control signaling for transmitting terminals and receiving terminals into a single unified signaling message. This single control signaling contains resource indication information that simultaneously serves both transmitting and receiving terminals, eliminating the need for separate signaling paths and reducing overall system complexity.
Solution Approach 2:
Instead of the base station explicitly assigning roles and resources to different terminals through separate signaling, the patent inverts the approach by having terminals independently determine their roles through cluster identifier comparison. The control signaling provides resource information without explicit role assignment, and terminals self-configure based on identifier matching.
Data Source
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Figure 3
Figure 3a
AI summary
Embodiments of the present invention disclose a resource indication method, an apparatus, and a system, and relate to the communications field, so as to reduce overhead of control signaling. The method provided in the embodiments of the present invention is applied to a device-to-device D2D communications system, where the D2D communications system includes at least one first node and one second node, and the method includes: receiving, by the first node, control signaling sent by the second node, where the control signaling includes an indication identifier and resource indication information corresponding to the indication identifier, and the resource indication information is used to indicate a resource used when data is transmitted; and determining, by the first node according to the indication identifier, to receive data or send data on the resource indicated by the resource indication information.