D2D Buffer Status Report Group Segmentation
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Solution Overview
Problem
Existing device-to-device (D2D) communication technologies face challenges in resource scheduling for D2D devices belonging to multiple communications groups, as traditional buffer status report (BSR) mechanisms cannot efficiently handle multiple groups.
Innovation Solution
A communications method where user equipment (UE) determines identification information of currently-enabled communications groups, generates and sends information about the amount of to-be-transmitted data to a base station, including identification information and buffer status reports, allowing the base station to allocate resources specifically for each group.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional BSR mechanism is used for D2D communication, then the mechanism is simple and easy to implement, but it cannot handle multiple communications groups simultaneously
Solution Approach 1:
The patent segments the BSR mechanism by introducing group identifiers that differentiate multiple communications groups. Each BSR now includes a group identifier field, allowing the system to segment buffer status reporting into separate logical channels for different groups, thereby enabling simultaneous handling of multiple groups while maintaining the basic BSR structure
Solution Approach 2:
The patent makes the BSR mechanism universal by designing it to handle both single-group and multi-group scenarios. The enhanced BSR structure with group identifiers can accommodate any number of communications groups, making the same mechanism applicable to diverse D2D communication scenarios without requiring separate mechanisms for each case
2Loss of information
If group identifier is added to BSR information, then multiple communications groups can be distinguished, but the information overhead increases
Solution Approach 1:
The patent applies local quality by making the group identifier field optional or variable in the BSR structure. The identifier is included only when necessary (e.g., when multiple groups are active), and the field size can be adjusted based on the number of groups, thereby providing complete group identification information while minimizing information overhead in different operational contexts
3Measurement precision
If separate resource scheduling is implemented for multiple groups, then resource allocation accuracy improves, but base station processing complexity increases
Solution Approach 1:
The patent segments resource scheduling by associating different group identifiers with different logical channel groups and resource pools. The base station schedules resources separately for each group based on their respective BSRs, achieving accurate resource allocation for each communications group while organizing the scheduling process into manageable segments through the group identifier-based structure
Data Source
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AI summary
Embodiments of the present invention disclose user equipment, a base station, and communications methods of the user equipment and the base station. In the embodiments of the present invention, information about amounts of to-be-transmitted data of different D2D communications groups may be reported to a base station, so that the base station can separately schedule data for the different communications groups. The information about the amount of the to-be-transmitted data includes identification information of the currently-enabled communications group, and a buffer status report of a logical channel group corresponding to the currently-enabled communications group.