Inter-Device Session Resource Scheduling in D2D Communications
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Solution Overview
Problem
Direct device-to-device (DD2D) communications in wireless cellular networks face interference issues when mobile devices communicate directly in licensed bands without network control, and existing solutions lack effective methods to maintain network control while enabling efficient device-to-device communication.
Innovation Solution
The implementation of inter-device sessions (IDS) in wireless communications networks, where configuration information, including radio network temporary identifiers (RNTIs), is transmitted to user equipment (UEs) to enable direct communication while maintaining network control through radio resource control (RRC) messages, allowing UEs to communicate directly and manage resources autonomously with minimal network intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If direct device-to-device communication is enabled without network control, then communication efficiency between devices is improved, but interference to other mobile devices increases
Solution Approach 1:
The network node acts as an intermediary that allocates dedicated time-frequency resources for device-to-device communication. By controlling resource allocation through RRC messages and scheduling decisions, the network enables direct device communication while preventing interference to other devices through proper resource isolation and management.
2Object-generated harmful factors
If network control is maintained for device-to-device communication, then interference is reduced, but communication overhead and complexity increase
Solution Approach 1:
The communication resources are segmented into specific time-frequency slots allocated by the network for device-to-device communication. This segmentation allows the network to control and isolate D2D communications from other traffic, reducing interference while managing complexity through structured resource division rather than continuous control.
Solution Approach 2:
The network performs preliminary resource allocation through RRC configuration messages before device-to-device communication occurs. By pre-allocating resources and providing configuration information including RNTIs, the network establishes control frameworks in advance, reducing the need for continuous control signaling and lowering communication overhead during actual D2D operations.
3Reliability
If continuous network involvement is used for device communication, then network control is ensured, but network overhead and device energy consumption increase
Solution Approach 1:
The network employs periodic scheduling where resources are allocated in defined time intervals through RRC messages. Devices communicate directly during allocated periods without continuous network involvement, reducing energy consumption while maintaining reliability through periodic network control and resource reallocation as needed.
Solution Approach 2:
Once resources are allocated by the network, devices autonomously manage their direct communication using the provided configuration information and RNTIs. This self-service capability allows devices to communicate efficiently without continuous network intervention, reducing both network overhead and device energy consumption while maintaining network control through initial allocation and periodic updates.
Data Source
AI summary
Methods, systems, and apparatuses of a wireless communications network can involve transmitting, to a first user equipment (UE), configuration information for the first UE (UE1 configuration information) for an inter-device session (IDS) between the first UE and a second UE. The UE1 configuration information may include a first IDS radio network temporary identifier (IDS-RNTI). A radio resource control (RRC) message indicating a resource allocation can be transmitted to the first UE for the first UE to communicate directly with the second UE.