Communication Control Device D2D Resource Modification Paging
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Solution Overview
Problem
In device-to-device (D2D) communication, UEs in idle mode do not reliably recognize modifications to allocated radio resources, leading to potential errors in inter-device communication, as they may use unadmitted resources or fail to recognize changes in admitted resources used by partner UEs.
Innovation Solution
A communication control device and method that includes a decision unit for determining available radio resources within a cell and a notification unit to inform terminal devices of these resources, with paging used to notify modifications, ensuring that resources before and after modification are used appropriately to prevent errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If radio resources are allocated to UEs for D2D communication, then communication capability is improved, but reliability deteriorates because UEs in idle mode do not reliably recognize resource modifications
Solution Approach 1:
The base station transmits paging messages to UEs in idle mode to notify them of radio resource modifications for D2D communication. This feedback mechanism ensures that UEs receive timely updates about resource changes, allowing them to adjust their resource usage accordingly and maintain reliable communication without needing to transition to connected mode.
Solution Approach 2:
The system performs preliminary notification of resource modifications through paging messages before the actual resource changes take effect. This allows UEs in idle mode to advance knowledge of upcoming resource modifications and prepare accordingly, preventing errors in resource usage while maintaining idle state benefits.
2Ease of operation
If UEs use radio resources without reliable recognition, then ease of operation is improved, but errors increase in inter-device communication
Solution Approach 1:
Paging messages provide feedback to UEs about current valid radio resources for D2D communication. This simple feedback mechanism ensures UEs operate with accurate resource information without complex procedures, maintaining ease of operation while preventing communication errors through proper resource recognition.
3Reliability
If resource modification notification is implemented through paging, then reliability is improved, but loss of time increases due to notification overhead
Solution Approach 1:
UEs in idle mode periodically monitor paging channels for resource modification notifications as part of their normal idle state operation. This self-service approach allows UEs to receive resource updates without additional active communication phases, minimizing time loss while ensuring reliable recognition of resource changes.
Data Source
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AI summary
There is provided a communication control device including a decision unit configured to decide radio resources available for inter-device communication within a cell, and a notification unit configured to notify a terminal device located within the cell of the radio resources. When the radio resources are modified, the notification unit gives notification of modification of the radio resources through paging. When the radio resources are modified, the radio resources before the modification refrain from being used for the inter-device communication after a predetermined timing and the radio resources after the modification are used for the inter-device communication after the predetermined timing.