D2D Relay Connection Management for Remote Terminal State Transition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In D2D relay communication, the transition of remote terminals from a connected state to an idle state is limited, leading to low utilization of D2D communication resources due to insufficient resource pool configurations and excess scheduling resources, which restricts the flexibility of resource usage.
Innovation Solution
The method involves determining whether to release the RRC connection with the base station based on the resource configuration mode used during D2D communication, allowing the remote terminal to switch from a connected state to an idle state when using the resource pool mode, and requesting a change to the resource configuration mode when using the scheduling mode, ensuring optimal resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the remote UE enters idle state by releasing RRC connection, then the signaling overhead is reduced, but the flexibility of D2D resource usage is limited
Solution Approach 1:
The patent introduces dynamic state transition mechanisms that allow the remote UE to flexibly switch between connected and idle states based on D2D communication requirements. The base station can control the RRC state through specific signaling (e.g., RRCConnectionRelease with suspend configuration), enabling the system to adapt resource allocation modes dynamically rather than being locked into a fixed state transition pattern.
Solution Approach 2:
The patent changes the parameter of RRC state management by introducing conditional state transitions. Instead of straightforward connection release, the system uses modified release procedures that preserve certain context information and allow flexible re-entry into connected state, thereby changing the operational parameters to maintain both low signaling overhead and high resource flexibility.
2Quantity of substance
If the resource pool configuration is increased to improve idle state usability, then the resource availability for idle UEs is improved, but the overall D2D communication resource utilization decreases
Solution Approach 1:
The patent applies local quality by differentiating resource allocation based on UE state and communication requirements. Instead of uniformly configuring resource pools for all idle UEs, the system selectively allocates resources based on specific D2D communication needs, ensuring that resource pool configurations are optimized locally for each scenario rather than applying a one-size-fits-all approach that would waste overall resources.
Solution Approach 2:
The system dynamically adjusts resource pool configurations based on real-time communication demands and UE states. The base station can modify resource allocations on-the-fly, transitioning UEs between states and adjusting resource availability dynamically, which prevents the static over-provisioning that would lead to reduced overall utilization.
3Adaptability or versatility
If the remote UE maintains connected state to preserve resource flexibility, then the D2D resource usage flexibility is maintained, but the signaling overhead increases
Solution Approach 1:
The patent applies partial action by maintaining only the necessary level of connection state information required for flexible resource usage. Instead of full connected state with all signaling overhead, the system uses partial connection maintenance (e.g., suspended state with preserved context) that provides sufficient flexibility for D2D resource allocation while minimizing unnecessary signaling overhead.
Data Source
AI summary
The present invention discloses a connection management method in device-to-device (D2D) relay communication, a terminal and a base station. The connection management method in D2D relay communication includes: determining whether a relay terminal for performing the D2D relay communication is selected when an Radio Resource Control (RRC) connection between a remote terminal in a network coverage and a base station is not released; when the relay terminal is determined to be selected, determining whether the RRC connection with the base station can be released according to a resource configuration mode used by the remote terminal when performing a D2D communication. By utilizing the connection management method, problems of state transition and connection management of the terminal in the D2D relay communication can be solved.