Separate MAC PDU Generation for D2D Communication Resource Allocation
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Solution Overview
Problem
In device-to-device (D2D) communication, existing methods lead to multiplexing of data in a single MAC PDU, resulting in high header overhead and unnecessary blind detection by receiving devices, which wastes power.
Innovation Solution
A method and apparatus for transmitting data where each D2D communication destination has a separate MAC PDU generated, with pre-configured identifiers and resource allocation based on Buffer State Reports (BSR) to prevent multiplexing and reduce header overhead, ensuring efficient resource utilization and minimizing blind detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data for multiple D2D communication destinations is multiplexed in a single MAC PDU, then resource utilization is improved, but header overhead increases and power consumption increases due to unnecessary blind detection
Solution Approach 1:
The patent segments the single MAC PDU into multiple separate MAC PDUs, each dedicated to a specific D2D communication destination. This segmentation eliminates the need for receiving devices to perform blind detection on multiplexed data, thereby reducing power consumption while maintaining efficient resource utilization through dedicated resource allocation for each destination.
2Productivity
If data for multiple D2D communication destinations is multiplexed in a single MAC PDU, then resource utilization is improved, but header overhead increases
Solution Approach 1:
By segmenting the data into separate MAC PDUs for each D2D communication destination, the patent eliminates redundant header information that would otherwise be repeated for each destination in a multiplexed structure. Each destination receives a dedicated MAC PDU with minimal necessary headers, reducing overall header overhead while maintaining resource utilization efficiency.
3Loss of energy
If separate MAC PDUs are generated for each D2D communication destination, then power consumption is reduced by preventing blind detection, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring resource allocations and routing information for multiple D2D communication destinations before data transmission. The network entity determines and notifies the transmitting device of specific resources for each destination in advance, allowing the transmitting device to efficiently generate separate MAC PDUs without complex real-time decision-making, thus reducing power consumption while managing device complexity.
4Loss of information
If separate MAC PDUs are generated for each D2D communication destination, then header overhead is reduced, but resource utilization efficiency may decrease
Solution Approach 1:
The network entity performs preliminary resource allocation and notifies the transmitting device of specific resources for each D2D communication destination before transmission. This advance planning ensures that separate MAC PDUs are transmitted over pre-assigned resources, minimizing header overhead while maintaining resource utilization efficiency through optimized resource distribution.
Data Source
AI summary
Disclosed are a data transmission method and device for device to device (D2D) communication, the method comprising: determining D2D communication destinations corresponding to a user equipment (UE) of a transmitting end; allocating a corresponding resource for each D2D communication destination; according to the resource corresponding to each D2D communication destination, generating a medium access control protocol data unit (MAC PDU) corresponding to the D2D communication destinations, and transmitting the MAC PDUs using the resource corresponding to the D2D communication destinations. The present invention separately generates a MAC PDU for each D2D communication destination of a UE of a transmitting end, thus preventing the data from one device to different D2D communication destination devices from being multiplexed into one MAC PDU, further reducing header overhead of the MAC PDU and eliminating unnecessary blind detection of a device of a receiving end, thereby saving power.