LC-MTC User Equipment Scheduling via Dynamic CQI Adjustment
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Solution Overview
Problem
Low Cost Machine Type Communication (LC-MTC) user equipment is limited by transmission block size restrictions, making it difficult to operate in the coverage area of legacy base stations, which hinders economy of scale and increases communication costs.
Innovation Solution
The method involves dynamically adjusting parameters such as channel quality indicators, buffer size values, and power headroom values to ensure that the legacy base station schedules transmission block sizes less than the predefined size of 1000 bits, allowing LC-MTC user equipment to operate effectively in legacy base station coverage areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If LC-MTC UE operates with transmission block size restriction of 1000 bits, then communication cost is reduced and economy of scale is achieved, but compatibility with legacy base stations deteriorates
Solution Approach 1:
The patent changes the CQI parameter values reported by the UE to influence base station scheduling decisions. By dynamically adjusting CQI reports based on the UE's transmission block size capabilities, the system enables legacy base stations to appropriately schedule LC-MTC UEs with restricted TBS, achieving both cost reduction and compatibility.
Solution Approach 2:
The patent implements a feedback mechanism where the UE monitors its scheduled TBS and adjusts its CQI reporting accordingly. This closed-loop feedback ensures that the base station receives accurate channel quality information that reflects the UE's actual transmission capabilities, enabling proper scheduling decisions that maintain both compatibility and cost efficiency.
2Productivity
If legacy base station schedules LC-MTC UE with transmission block size greater than 1000 bits, then communication throughput is improved, but UE capability limitations are violated
Solution Approach 1:
The UE continuously monitors the TBS allocated by the base station and compares it against its 1000-bit capability limit. When the allocated TBS exceeds the UE's capability, the UE adjusts its CQI reporting in subsequent transmissions to guide the base station toward allocating appropriate TBS sizes, ensuring capability compliance while maintaining reasonable throughput.
Solution Approach 2:
The CQI reporting mechanism is made dynamic rather than static. The UE adapts its CQI values based on real-time scheduling outcomes and channel conditions, allowing the system to flexibly respond to varying throughput requirements while consistently respecting the UE's transmission block size limitations.
3Productivity
If CQI value is increased to improve scheduling allocation, then transmission block size increases, but TBS restriction of 1000 bits is violated
Solution Approach 1:
The patent modifies the CQI parameter values that the UE reports to the base station. By carefully selecting and adjusting CQI indices within a constrained range, the UE influences the base station's scheduling algorithm to allocate TBS sizes that do not exceed 1000 bits, thereby maintaining both productivity and restriction compliance through controlled parameter manipulation.
Data Source
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AI summary
Methods and apparatuses for use in a low cost machine type communication user equipment, wherein the low cost machine type communication user equipment communicates with a legacy base station, are provided. The method comprises adjusting at least one parameter relating to scheduling such that the legacy base station is to schedule the low cost machine type communication user equipment with a transmission block size less than a predefined size. The method also comprises reporting the adjusted at least one parameter to the legacy base station. With the methods and apparatuses of the present disclosure, it is possible for the low cost machine type communication use equipment to operate in the coverage area of the legacy base station.