Scheduling Request Management in Dual Connectivity
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Solution Overview
Problem
In dual connectivity scenarios, simultaneous scheduling request transmissions from primary and secondary cells can lead to overlapping, resulting in suboptimal utilization of user equipment power, especially in power-limited situations, as existing technologies do not allow simultaneous transmissions across different cell groups.
Innovation Solution
Implementing a system where scheduling requests from different cell groups are handled by setting prohibit timers and prioritizing transmissions, ensuring that only one request is allowed per subframe, and using a common or independent scheduling request prohibit timer to manage overlapping requests, allowing the user equipment to fully utilize its transmit power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If simultaneous scheduling request transmissions are allowed from primary and secondary cells, then the user equipment can transmit more requests at once, but the transmit power is not fully utilized due to overlapping transmissions
Solution Approach 1:
The patent applies preliminary action by introducing prohibit timers that are started in advance before potential overlapping transmissions occur. When a scheduling request is triggered, the corresponding prohibit timer is started to prevent other simultaneous transmissions from the same or different cell groups, ensuring full power utilization is maintained while allowing multiple requests to be managed systematically.
2Use of energy by moving object
If prohibit timers are used to manage simultaneous scheduling requests, then transmit power is fully utilized, but the system complexity increases due to timer management mechanisms
Solution Approach 1:
The patent applies universality by designing the prohibit timer mechanism to serve multiple functions simultaneously: it prevents overlapping transmissions, manages power utilization, and handles scheduling requests from both primary and secondary cells through a unified approach. This multi-functional design reduces overall system complexity compared to having separate management mechanisms for each function.
3Use of energy by moving object
If scheduling requests from different cell groups are prioritized and managed sequentially, then power utilization is optimized, but the response time for simultaneous requests increases
Solution Approach 1:
The patent applies dynamics by making the scheduling request management adaptive rather than static. The prohibit timers are dynamically adjusted based on the triggering conditions and cell group configurations, allowing the system to respond efficiently to simultaneous requests while maintaining power optimization. The dynamic timer management enables flexible handling of different transmission scenarios without fixed delays.
Data Source
AI summary
Briefly, in accordance with one or more embodiments, an apparatus may be configured to receive a first scheduling request transmission for a first cell group, and a second scheduling request transmission for a second cell group, determine one of the first scheduling request and the second scheduling request to have a higher priority and another one of the first scheduling request and the second scheduling request to have a lower priority, and process the scheduling request having a higher priority without processing the scheduling request having a lower priority. An apparatus may be configured to combine a configuration of a first scheduling request for a first cell group and a second configuration of a second scheduling request for a secondary cell group in a system radio bearer, and transmit the SRB to a user equipment to process the first scheduling request and the second scheduling request.