Radio Resource Allocation with Variable Sub-Frame Duration
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Solution Overview
Problem
In wireless communication systems, misaligned time references between communication devices lead to underutilization of radio resources, as existing scheduling methods cannot fully exploit available resources when time references are not synchronized.
Innovation Solution
A method for radio resource allocation that determines a communication time interval with variable duration based on the time shift between different time references, allowing for efficient scheduling of sub-frames, even when time references are misaligned, by adjusting the duration of communication intervals to match the time shift between devices or component carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a typical scheduler allocates resources to wireless communication devices with misaligned time references, then radio resources are not fully utilized, but the scheduling method cannot accommodate the time reference misalignment
Solution Approach 1:
The patent applies dynamics by making the communication time interval variable rather than fixed. The scheduler determines a variable duration for the communication time interval based on the time shift between different time references, allowing the system to adapt dynamically to misaligned time references while maintaining full radio resource utilization. This resolves the contradiction by enabling the scheduling method to accommodate time reference misalignment without sacrificing resource utilization efficiency.
2Productivity
If fixed duration sub-frames are used for scheduling, then scheduling is simple, but radio resources cannot be fully exploited when time references are misaligned
Solution Approach 1:
The patent applies parameter changes by modifying the duration parameter of the communication time interval from a fixed value to a variable value. The scheduler determines the duration based on the time shift between time references, changing the temporal parameter to match the actual timing conditions. This allows full exploitation of radio resources while keeping the scheduling mechanism relatively simple, as it only requires adjusting the time interval parameter rather than redesigning the entire scheduling framework.
3Productivity
If variable duration communication time intervals are scheduled based on time shift, then radio resources are fully utilized, but scheduling complexity increases
Solution Approach 1:
The patent applies preliminary action by having the scheduler determine the time shift between different time references in advance, before allocating radio resources. The communication time interval duration is calculated based on this pre-determined time shift, allowing the scheduler to prepare the appropriate time interval configuration beforehand. This approach enables full radio resource utilization while managing complexity by performing the time shift analysis and duration calculation as preliminary steps rather than during resource allocation.
Data Source
Figure 1A~1B
Figure 2A~2C
Figure 3A~3C
AI summary
A radio resource allocation method in a communication node is disclosed. The method comprises determining (424) that a first time reference or a fist communication using a first component carrier has a time shift compared to a second time reference of a second communication using a second component carrier. The method further comprises determining (426) a duration of a communication sub-frame based on the time shift, and scheduling (428) the determined communication sub-frame on a first component carrier to a first communication device. The determined frame duration is equal to the time shift or equal to the normal sub-frame length minus the time shift so as to avoid any overlap or interference. Corresponding computer program product, arrangement, communication node and first communication device are also disclosed.