D2D Resource Pool Notification for Load Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current D2D communication systems face high loads in terminal devices and base stations when recognizing available radio resources, particularly due to trial and error searches in out-of-coverage scenarios, leading to increased resource consumption and processing loads.
Innovation Solution
Implementing a mechanism where the base station and terminal devices notify each other of pre-selected resource pools, reducing the need for trial and error searches by providing identification information for resource pools, thereby minimizing the load required to recognize available radio resources for D2D communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the base station freely selects radio resources for D2D communication without constraints, then the terminal device can recognize available resources, but the load on the base station becomes large due to using many radio resources for notification
Solution Approach 1:
The patent divides the radio resources into multiple resource pools with different characteristics (e.g., different time/frequency allocations, different QoS properties). The base station notifies terminal devices of multiple segmented resource pools rather than a single undifferentiated set, allowing efficient organization and notification while reducing overall notification overhead.
Solution Approach 2:
The base station pre-configures and notifies terminal devices of multiple resource pools in advance, before actual D2D communication needs arise. This preliminary action allows terminal devices to have ready knowledge of available resources, reducing the need for dynamic resource allocation and reducing base station load during active communication.
2Loss of information
If the representative terminal device notifies other terminal devices of radio resources in out-of-coverage scenarios, then resource information can be shared, but the load on the representative terminal device becomes large
Solution Approach 1:
The patent segments radio resources into multiple resource pools that can be independently selected and notified. In out-of-coverage scenarios, the representative terminal device only needs to notify others of relevant resource pools rather than all possible resources, reducing notification overhead and device load.
Solution Approach 2:
The patent introduces parameters such as resource pool indices and selection criteria that allow terminal devices to efficiently identify and notify specific resource pools. By changing from notifying all resources to notifying selected resource pools based on parameters, the load on representative terminal devices is significantly reduced.
3Loss of information
If terminal devices perform trial and error search to detect synchronization signals and synchronization information, then they can find available resources, but the processing load on terminal devices increases
Solution Approach 1:
The base station or representative terminal device performs the resource selection and notification action in advance. Terminal devices receive pre-notified resource pool information, eliminating the need for trial-and-error searches. This preliminary action transfers the complexity from terminal devices to the base station or representative device.
Solution Approach 2:
The base station acts as an intermediary that centralizes the complex task of resource selection and notification. Instead of each terminal device independently performing trial-and-error searches, the intermediary base station performs the search once and notifies all terminal devices, reducing overall system complexity.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A device includes circuitry configured that acquires information indicating one or more resource pools serving as radio resources available for device-to-device communication, and that notifies a terminal device of the one or more resource pools, where the one or more resource pools are resource pools that are selected from among a resource pool set including multiple resource pools. The multiple resource pools are determined in advance as candidates for radio resources available for device-to-device communication.