D2D Discovery Resource Allocation via Service Differentiation
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Solution Overview
Problem
Current wireless communication technologies face challenges in efficiently managing device-to-device (D2D) communication in cellular networks, particularly in allocating resources for D2D discovery services and differentiating between public safety (PS) and non-PS services, which affects data transmission efficiency and network traffic management.
Innovation Solution
The implementation of resource block allocation strategies by eNodeBs for D2D services, where specific resource blocks and subframes are designated for PS and non-PS services, enabling efficient D2D communication by configuring unique cyclic redundancy check (CRC) codes and scrambling identities based on service types, and utilizing existing uplink channels for direct discovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If resource blocks are allocated for D2D discovery services without differentiation, then resource allocation is simplified, but data transmission efficiency deteriorates due to mixed service types
Solution Approach 1:
The patent segments resource blocks into separate pools for PS D2D discovery and non-PS D2D discovery services. The eNodeB allocates specific resource blocks exclusively for PS services and other resource blocks for non-PS services, preventing mixed service type transmissions and improving transmission efficiency through service-specific optimization.
Solution Approach 2:
The patent applies local quality by configuring different parameters (such as cyclic redundancy check codes and scrambling identities) specifically for PS service resource blocks versus non-PS service resource blocks. This localized differentiation allows each service type to be optimized for its specific requirements while maintaining overall system organization.
2Productivity
If D2D discovery services are differentiated by service type, then data transmission efficiency is improved, but device complexity increases due to separate resource management
Solution Approach 1:
The eNodeB acts as an intermediary that manages the complexity of differentiated resource allocation. It maintains separate resource block pools and configuration parameters for PS and non-PS services, offloading the complexity management from individual UEs. The eNodeB signals the appropriate resource pool and configuration to UEs based on their service type, simplifying UE implementation while enabling efficient differentiated transmission.
3Reliability
If separate resource blocks are allocated for PS and non-PS services, then network traffic management is improved, but loss of information increases due to additional configuration signaling
Solution Approach 1:
The eNodeB performs preliminary configuration by pre-defining resource block pools and associated parameters (cyclic redundancy check codes, scrambling identities) for each service type before D2D discovery transmissions occur. This advance configuration allows UEs to efficiently select appropriate resources without requiring extensive real-time signaling, reducing information loss while maintaining reliable traffic management.
Data Source
AI summary
Wireless mobile devices or user equipments (UEs) may communicate directly with other UEs, e.g., using device-to-device (“D2D”) direct discovery and communication. D2D direct discovery and communication may be used, for example, when UEs communicate with each other while within direct wireless range of each other. Different service types for D2D direct discovery and communication sessions, such as public safety (PS) services, non-PS services, etc., may utilize different data characteristics for the discovery message (e.g., data types and data structures). Data associated with the at least one data frame of a D2D direct discovery transmission can be configured to indicate these different data characteristics.