Resource Allocation via LCG ID Mapping for D2D Scheduling
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Solution Overview
Problem
In the context of D2D communication in LTE systems, the base station is unable to perform PPP-based scheduling due to a lack of knowledge about the correspondence between Buffer Status Report (BSR) information and Priority Per Packet (PPP) parameters, which are unknown to the network.
Innovation Solution
A method where the network side device notifies the UE about the correspondence between PPPs and Logic Channel Group Identifiers (LCG IDs), allowing the network to determine and allocate resources based on this information, enabling PPP-based scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the base station schedules resources for D2D communication using Mode 1, then resource allocation control is improved, but the ability to perform PPP-based scheduling deteriorates because the base station does not know the correspondence between BSR information and PPP parameters
Solution Approach 1:
The patent introduces LCG ID as an intermediary element that bridges the gap between BSR information and PPP parameters. The LCG ID is included in the BSR message to indirectly convey PPP parameter correspondence information to the base station, enabling PPP-based scheduling without directly transmitting the sensitive PPP parameter mappings.
Solution Approach 2:
The patent implements a feedback mechanism where the UE provides BSR information containing LCG ID to the base station. This feedback loop allows the base station to infer PPP parameter correspondence relationships based on the LCG ID mappings that the UE maintains, enabling the base station to perform PPP-based resource scheduling decisions.
2Adaptability or versatility
If the UE voluntarily selects resources using Mode 2, then resource selection flexibility is improved, but network control over resource allocation deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where the UE reports BSR information with LCG ID to the network. This allows the network to maintain awareness of resource usage patterns and PPP parameter mappings even when the UE autonomously selects resources, enabling the network to provide guidance and maintain control when necessary while preserving UE flexibility.
Solution Approach 2:
The patent enables the UE to autonomously determine LCG ID mappings and perform resource selection based on its own PPP parameters and buffer status. The UE serves itself by maintaining the correspondence information locally and using it to make intelligent resource selection decisions, while still providing necessary information to the network for overall system coordination.
3Reliability
If the network configures QoS parameters for each bearer in conventional LTE systems, then QoS-based scheduling is improved, but the ability to schedule based on PPP parameters in D2D communication deteriorates because PPP parameters are unknown to the network
Solution Approach 1:
The patent uses LCG ID as an intermediary that allows the network to indirectly access PPP parameter information. By configuring and tracking LCG ID mappings at the UE and having the UE report these mappings in BSR messages, the network can infer PPP parameter correspondence relationships and perform PPP-based scheduling decisions without directly knowing the complete PPP parameter mappings.
Solution Approach 2:
The patent establishes LCG ID mappings in advance at the UE before resource allocation occurs. The UE pre-configures the correspondence between logic channels, LCG IDs, and PPP parameters, and uses this pre-established mapping to both select resources autonomously and provide information to the network for coordinated scheduling.
Data Source
Figure 1A
Figure 1B~2
Figure 3
AI summary
The present disclosure relates to the field of wireless communication technology, and provides a resource allocation method and a resource allocation device. A network side device notifies a first correspondence between PPPs and LCG IDs of each target address to a UE, determines the PPPs corresponding to the LCG IDs of each target address in a sidelink BSR MAC CE in accordance with the first correspondence, and then allocates a resource for each target address of the UE in accordance with the determined PPPs and buffer status information corresponding to the LCG IDs of each target address in the sidelink BSR MAC CE.