D2D Control Information Multiplexing on PUCCH
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Solution Overview
Problem
Current device-to-device (D2D) communication systems face challenges in efficiently receiving and transmitting resource allocation information, leading to increased signaling overhead and complexity in configuring data transmission and reception timing.
Innovation Solution
A method and apparatus for D2D communication that reduces signaling overhead by using common control information, allowing user equipment (UE) to receive resource allocation information and define transmission and reception timing effectively, enabling efficient data transmission between UEs without relying on a base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If separate control information is used for D2D communication, then transmission timing can be precisely controlled, but signaling overhead increases
Solution Approach 1:
The patent combines D2D control information with uplink control information into a single PUCCH transmission. The UE multiplexes both types of control information together, transmitting them simultaneously on the same physical uplink control channel, thereby reducing signaling overhead while maintaining precise transmission timing control
Solution Approach 2:
The PUCCH is designed to serve multiple functions by carrying both uplink control information and D2D control information. This multi-functional approach allows the same communication resource to handle different types of control signaling, reducing the need for separate dedicated channels and lowering overall signaling overhead
2Measurement precision
If separate control information is used for D2D communication, then control precision is improved, but device complexity increases
Solution Approach 1:
The patent merges D2D control information with uplink control information into a single transmitted message. This combination reduces the number of separate control channels and configurations the UE must manage, thereby lowering device complexity while preserving the precision of control signaling through proper multiplexing
3Productivity
If D2D communication is implemented, then network capacity increases, but base station burden increases
Solution Approach 1:
The patent enables UEs to autonomously transmit and receive D2D control information using existing uplink control resources. The base station does not need to separately allocate or manage dedicated D2D control channels, as UEs self-organize the transmission using multiplexing on existing PUCCH resources, thereby increasing network capacity while minimizing additional base station burden
Data Source
Figure 1(a)~1(b)
Figure 2
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AI summary
According to an embodiment of the present invention, a method for a first terminal to receive control information from a second terminal for device to device communication includes the steps of: receiving downlink control information (DCI) format containing a link indicator; and obtaining selectively one of downlink allocation information and uplink permission information contained in the DCI format according to the link indicator, wherein the downlink allocation information indicates a resource region for receiving data from the second terminal, and the uplink permission information indicates a resource region for transmitting data to the second terminal.