IDMA Interleaver Allocation Control for Lower Signaling Overhead
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Solution Overview
Problem
In cellular systems, semi-persistent scheduling (SPS) in LTE and LTE-Advanced leads to high overhead due to frequent interactions on the control channel for interleaver allocation in IDMA systems, which also occurs in IDMA systems, affecting spectral efficiency and energy efficiency.
Innovation Solution
A communication control apparatus and method that dynamically changes the interval of interleaver allocation in IDMA systems, allowing for reduced overhead by switching from dynamic to static or quasi-static allocation policies based on communication environment information, such as QCI and packet statistics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semi-persistent scheduling (SPS) is used for interleaver allocation in IDMA systems, then spectral efficiency is improved, but overhead increases due to frequent control channel interactions
Solution Approach 1:
The patent applies dynamics by making the interleaver allocation interval configurable and adaptable. The system can dynamically adjust between frequent allocation (for high spectral efficiency) and less frequent allocation (for reduced overhead) based on communication conditions, user equipment mobility, and traffic patterns. This dynamic parameter adjustment resolves the contradiction by allowing the system to optimize the trade-off between spectral efficiency and overhead in different operational scenarios.
Solution Approach 2:
The patent implements parameter changes by introducing a configurable allocation interval parameter for interleavers. By changing this parameter, the system can adjust the frequency of control channel interactions. When the interval is increased, overhead is reduced; when decreased, spectral efficiency is improved. This parameter-based approach allows flexible resolution of the contradiction between spectral efficiency and overhead.
2Reliability
If semi-persistent scheduling (SPS) is used for interleaver allocation in IDMA systems, then communication quality is improved, but energy efficiency deteriorates due to frequent control channel interactions
Solution Approach 1:
The patent applies dynamics by enabling the system to adapt the interleaver allocation interval based on communication quality requirements and energy constraints. When communication quality requirements are high, the system can use shorter intervals; when energy efficiency is prioritized, longer intervals are used. This dynamic adaptation resolves the contradiction between communication quality and energy efficiency.
Solution Approach 2:
The patent implements parameter changes by configuring the allocation interval parameter to balance communication quality and energy consumption. By adjusting this parameter, the system can reduce the frequency of control channel interactions, thereby saving energy while maintaining acceptable communication quality. This parameter-based control allows flexible resolution of the contradiction.
3Adaptability or versatility
If dynamic interleaver allocation is used, then adaptability to communication environment is improved, but overhead increases due to frequent control messages
Solution Approach 1:
The patent applies dynamics by implementing a configurable allocation interval that allows the system to balance adaptability and overhead. The system can adjust the interval dynamically based on how rapidly the communication environment changes. In stable environments, longer intervals reduce overhead; in rapidly changing environments, shorter intervals maintain adaptability. This resolves the contradiction between adaptability and overhead.
Data Source
AI summary
Provided is a communication control apparatus including a communication unit configured to perform communication with a radio communication apparatus of a communication system in which interleave division multiple access (IDMA) is used, and an interval control unit configured to dynamically change an interval of allocation of an interleaver used for IDMA by the radio communication apparatus.