In-Vehicle RF Resource Handover for Dual-Call Continuity
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Solution Overview
Problem
In a 5G dual-card scenario, user equipment experiences high power consumption and radio frequency resource conflicts due to shared resources, leading to suspended secondary card operations and impaired data services.
Innovation Solution
Implement a method and apparatus for radio frequency resource handover between a primary device and an in-vehicle device, allowing simultaneous use of these resources by multiple devices to avoid conflicts and optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the primary card and secondary card share a single set of radio frequency resources, then the device complexity is reduced, but the reliability of call transmission deteriorates due to resource conflicts
Solution Approach 1:
The patent divides the radio frequency resource usage into separate time slots for the primary card and secondary card. The handover request message triggers a resource switching mechanism that segments the shared radio frequency resources into distinct usage periods, allowing each card to have dedicated access during its assigned time slot, thereby eliminating conflicts while maintaining the shared hardware architecture.
2Reliability
If the primary card uses radio frequency resources for a call, then the call quality is ensured, but the secondary card is suspended and cannot perform data services
Solution Approach 1:
The patent implements a dynamic resource allocation mechanism where the radio frequency resources are not statically assigned to one card but can be switched between the primary and secondary cards based on real-time needs. The handover request message initiates this dynamic switching, allowing the system to adapt resource allocation to current service requirements, ensuring both call quality and data service capability are maintained through time-multiplexed access.
3Object-affected harmful factors
If the secondary card is suspended during primary card calls, then the radio frequency resource conflict is avoided, but the battery drain increases due to repeated suspensions and resurrections
Solution Approach 1:
The patent employs a preliminary action mechanism where the handover request message is sent in advance to initiate the resource switching process before the primary card's call fully commences. This proactive approach allows the secondary card to be gracefully suspended with proper state preservation, avoiding repeated abrupt suspensions and resurrections that would cause excessive power consumption, while still preventing resource conflicts.
Data Source
AI summary
A call method and apparatus, and an electronic device are provided. The method includes: when a first call of a first device is transmitted by using radio frequency resources of the first device and that a second call of a second device is transmitted by using radio frequency resources of an in-vehicle device, obtaining, by the in-vehicle device, a radio frequency resource handover request message, where the radio frequency resource handover request message is used to indicate that the first call requests to use the radio frequency resources of the in-vehicle device; and handing over, by the in-vehicle device, the radio frequency resources of the in-vehicle device to the first device, so that the first call is transmitted by using the radio frequency resources of the in-vehicle device and that the second call is transmitted by using radio frequency resources of the second device.