D2D Resource Allocation via Segmented Control and Data Regions
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Solution Overview
Problem
In wireless communication systems supporting D2D communication, there is an issue of unnecessary battery consumption in user equipment (UE) due to receiving all blind decoding from a resource predetermined by a base station, which is not efficiently utilized for transmitting control information and data.
Innovation Solution
A method for a transmission UE to efficiently transmit control information and data to a reception UE by autonomously determining scheduling information and dynamically allocating resources using RRC signals and physical/MAC control channels, reducing unnecessary decoding and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a resource is predetermined by a base station for D2D communication, then resource allocation is simplified, but unnecessary battery consumption occurs due to blind decoding of all resources
Solution Approach 1:
The patent segments the predetermined resource into two distinct parts: control information resources and data resources. The control information resource is used to transmit scheduling information that dynamically indicates the actual data resource location. This segmentation allows the reception UE to first decode control information and then selectively decode data only in the indicated resource, avoiding blind decoding of all predetermined resources and reducing battery consumption.
2Productivity
If blind decoding is performed on all predetermined resources, then resource utilization is maximized, but communication efficiency decreases due to unnecessary decoding operations
Solution Approach 1:
The patent applies preliminary action by first transmitting control information that contains scheduling indicators before the actual data transmission. The reception UE performs preliminary decoding of control information resources to obtain scheduling information, which then guides the selective decoding of data resources. This preliminary action eliminates the need for blind decoding of all predetermined resources, reducing unnecessary decoding operations and time loss while maintaining full resource utilization.
3Device complexity
If control information and data are transmitted using the same predetermined resource, then resource allocation is simple, but interference increases and communication performance decreases
Solution Approach 1:
The patent segments the resource allocation into separate control information resources and data resources. Control information is transmitted in dedicated control resources, while data is transmitted in separately indicated data resources. This segmentation reduces interference between control and data transmissions, improves communication reliability, and maintains manageable allocation complexity through the use of scheduling indicators.
Data Source
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AI summary
The present document relates to a method for a base station to efficiently indicate, to a transceiving terminal, a resource region to which control information and data are to be transmitted in a wireless communication system supporting direction communication between terminals, that is, D2D communication, and an apparatus therefor. To that end, the transmitting terminal receives, from a base station, resource allocation information associated with D2D communication, and on the basis of the resource allocation information received from the base station, transmits, to a receiving terminal, control information (SA) for D2D communication and data corresponding to the control information, wherein the resource allocation information comprises first resource region information for transmitting the control information, and the transmitting terminal acquires, on the basis of the first resource region information, a second resource region information for transmitting the data.