D2D Communication Prohibition for Cellular Paging Reliability
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Solution Overview
Problem
In mixed cellular and Device-to-Device (D2D) communication environments, existing methods fail to ensure that D2D communication does not disrupt cellular communication, leading to missed cellular paging instances, especially for single-receiver devices or scenarios where dual receivers are not feasible.
Innovation Solution
A method where user equipment in a D2D radio network receives information about upcoming cellular communication occasions from a first user equipment and prohibits communication during those occasions, ensuring that D2D communication does not interfere with cellular communication by sending a message indicating when communication should be prohibited.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If D2D communication is allowed during cellular communication occasions, then D2D communication continuity is improved, but cellular communication reliability deteriorates due to missed paging instances
Solution Approach 1:
The first user equipment sends a message to the second user equipment in advance, indicating upcoming cellular communication occasions during which D2D communication should be prohibited. This preliminary notification allows the second UE to preemptively suspend D2D transmissions, preventing interference with cellular paging reception before it can occur.
Solution Approach 2:
The system performs the action of notifying about cellular communication occasions in advance, allowing the second user equipment to prepare and prohibit D2D communication during these critical periods. This preliminary scheduling ensures that cellular communication requirements are met before D2D communication resumes.
2Productivity
If dual receivers are used to receive both cellular and D2D communications simultaneously, then communication performance is improved, but device complexity increases
Solution Approach 1:
The communication resource timeline is segmented into cellular communication occasions and D2D communication occasions. During cellular occasions, the receiver is dedicated to cellular communication; during D2D occasions, it switches to D2D communication. This temporal segmentation allows single-receiver devices to handle both communication types effectively without requiring simultaneous dual-receiver capability.
Solution Approach 2:
The receiver configuration is made dynamic, switching between cellular and D2D reception modes based on the current time slot and received notifications. This dynamic switching allows a single receiver to adaptively serve both communication purposes, avoiding the need for fixed dual-receiver architecture.
3Reliability
If D2D communication is prohibited during cellular occasions, then cellular communication reliability is improved, but D2D communication productivity decreases
Solution Approach 1:
D2D communication is scheduled in periodic intervals that align with cellular communication patterns. By prohibiting D2D only during specific cellular occasions (such as paging occasions) while allowing it during other time slots, the system maintains cellular reliability while maximizing D2D productivity through periodic transmission opportunities.
Solution Approach 2:
The communication parameters (transmission power, scheduling intervals, resource allocation) are dynamically adjusted based on whether the current time slot is designated for cellular or D2D communication. During cellular occasions, D2D parameters are set to zero or prohibited; during D2D occasions, full D2D transmission parameters are activated, optimizing overall system performance.
Data Source
AI summary
A method in a first user equipment for communicating with a second user equipment over a D2D radio link in a D2D radio network is provided. The first user equipment and the second user equipment are comprised in the D2D radio network. The first user equipment is further comprised in a cellular communications network. The first user equipment obtains (301) information of an upcoming occasion. The occasion is related to a communication in the cellular communications network. The first user equipment then sends (302) a message to the second user equipment over the D2D radio link. The message indicates the upcoming occasion and that communication from the second user equipment to the first user equipment over the D2D radio link shall be prohibited (303) during the occasion.