Frequency Hopping Subband Segmentation for MTC Signal Reliability
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Solution Overview
Problem
Wireless communication systems face challenges in reliably transmitting and receiving Machine Type Communication (MTC) signals, especially in poor radio channel environments, where existing methods struggle to maintain performance and efficiency.
Innovation Solution
Implementing frequency hopping on subbands within a wireless communication system to enhance the transmission and reception of MTC signals, allowing MTC devices to operate effectively even in challenging environments by dynamically changing the subband used for signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency hopping is performed on subbands for MTC signal transmission, then reliability of signal transmission in poor radio channel environments is improved, but device complexity increases
Solution Approach 1:
The patent divides the frequency band into multiple subbands and performs frequency hopping across these segmented subbands for MTC signal transmission. This segmentation allows the system to switch between different frequency regions to avoid poor channel conditions, thereby improving reliability while managing device complexity through structured frequency division
Solution Approach 2:
The patent implements dynamic frequency hopping where the subband used for MTC signal transmission changes over time according to channel conditions. This dynamic adaptation allows the system to respond to varying radio environments, improving transmission reliability without requiring overly complex static configurations
2Reliability
If frequency hopping is implemented for MTC signal transmission, then performance in poor radio channel environments is improved, but energy consumption increases
Solution Approach 1:
The patent applies frequency hopping at the subband level rather than across the entire frequency band. This localized approach allows the system to maintain stable connections in good subbands while only hopping when necessary to avoid poor subbands, thereby improving performance in challenging conditions while minimizing unnecessary energy consumption from constant frequency changes
3Adaptability or versatility
If frequency hopping is used for MTC signal transmission, then adaptability to different radio channel conditions is improved, but system complexity increases
Solution Approach 1:
The patent changes the frequency parameter of MTC signal transmission by hopping between different subbands. This parameter change allows the system to adapt to varying radio channel conditions by selecting optimal frequency regions, improving adaptability while managing system complexity through controlled parameter variation rather than fundamental system redesign
Data Source
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AI summary
According to one embodiment of the present invention, a method of receiving a downlink signal by a machine type communication user equipment (MTC UE) in a wireless communication system can comprise obtaining frequency hopping information on a plurality of subbands included in a downlink band and repeatedly receiving the downlink signal via different subbands based on the frequency hopping information. In this case, the downlink band includes ⌊NRB6⌋ number of subbands each configured as 6 resource block (RB) size and 'NRB' corresponds to a size of the downlink band. If a remaining band which does not belong to the ⌊NRB6⌋ number of subbands and is smaller than 6 RB size exists in the downlink band, at least one of a lowest index RB, a highest index RB and an intervening RB between subband groups in the downlink band may be configured as the remaining band.