Dynamic MTC-On Interval Extension for Random Access Completion
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Solution Overview
Problem
In communication systems, Machine-Type Communications (MTC) devices face challenges in completing random access procedures within the defined MTC-On intervals due to sporadic data transmissions and shared radio resources, leading to potential delays or interruptions, which can impact network efficiency and device performance.
Innovation Solution
An access network element manages random access procedures by defining MTC reservation patterns with MTC-On and MTC-Off intervals, allowing modifications such as extending or truncating these intervals to ensure timely completion of MTC device procedures, using a scheduling mechanism to detect transitions and request pattern modifications from a pattern manager based on time differences and traffic thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If MTC devices perform random access procedures during MTC-On intervals only, then network resource efficiency is improved, but random access completion reliability deteriorates due to possible interruptions at interval transitions
Solution Approach 1:
The patent applies dynamics by making the MTC-On interval duration adjustable rather than fixed. The network device dynamically extends the MTC-On interval when random access procedures are not completed, allowing the interval length to adapt based on actual procedure completion status. This resolves the contradiction by maintaining reliable completion while still restricting access to defined intervals for efficiency.
Solution Approach 2:
The patent changes the time parameter of the MTC-On interval dynamically. When random access procedures cannot complete before the interval ends, the system modifies the interval duration parameter to extend it, ensuring completion while maintaining the structured interval-based resource allocation for efficiency.
2Productivity
If MTC reservation pattern is strictly enforced, then radio resource allocation efficiency is improved, but random access procedure completion time deteriorates due to MTC-Off interval prohibitions
Solution Approach 1:
The system dynamically adjusts the MTC reservation pattern by extending MTC-On intervals when needed. This allows the pattern to be strict during normal operation for efficiency, but flexible when random access procedures require more time, thus resolving the contradiction between enforcement strictness and completion timing.
Solution Approach 2:
The network device monitors whether random access procedures complete within the designated MTC-On intervals and provides feedback by extending the interval duration when completion is not achieved. This feedback mechanism allows the system to maintain strict patterns for efficiency while accommodating timing requirements when necessary.
3Reliability
If MTC-On intervals are extended to accommodate incomplete procedures, then random access completion reliability is improved, but radio resource allocation efficiency deteriorates due to extended MTC-On intervals
Solution Approach 1:
The MTC-On interval duration is made dynamic rather than statically extended. The interval extends only when and for as long as needed to complete random access procedures, then returns to the original pattern. This resolves the contradiction by maintaining reliability through selective extension while preserving overall allocation efficiency through dynamic reversion.
Solution Approach 2:
The system temporarily changes the time parameter of MTC-On intervals only when random access procedures are incomplete, then reverts to the original parameter values. This selective parameter modification ensures completion reliability while minimizing impact on long-term resource allocation efficiency.
Data Source
AI summary
Systems, methods, and software for handling random access procedures. In one embodiment, an access network element that stores an MTC reservation pattern that defines at least one MTC-On interval where MTC is allowed, and defines at least one MTC-Off interval where MTC is prohibited. During an MTC-On interval, the access network element receives preambles for random access procedures from MTC devices, and performs the random access procedures for the MTC devices in response to the preambles. The access network element detects a transition from the MTC-On interval to a next MTC-Off interval, and determines whether the random access procedures for the MTC devices will complete before the transition. If not, the access network element modifies the MTC reservation pattern to expedite completion of the random access procedures.