MTC Signal Timing Offset for Coverage and Complexity
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Solution Overview
Problem
Current wireless communication systems face challenges in effectively transmitting and receiving signals for machine type communication (MTC) and coverage enhancement, particularly in repeated transmission and reception scenarios, where existing methods fail to optimize signal configuration and timing for improved coverage.
Innovation Solution
The method involves detecting physical downlink control channel (PDCCH) signals and transmitting/receiving physical uplink shared channel (PUSCH) and physical downlink shared channel (PDSCH) signals with specific offsets in subframe intervals, preconfigured via higher layer signaling, to enhance signal transmission and reception timing for UEs of different types, thereby improving coverage and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repeated transmission is used for coverage enhancement, then coverage is improved, but device complexity increases
Solution Approach 1:
The patent segments UEs into two types based on their repeated transmission capabilities. First-type UEs perform repeated transmissions for coverage enhancement, while second-type UEs do not perform repeated transmissions. This segmentation allows the system to improve coverage for devices that need it without forcing all devices to implement complex repeated transmission mechanisms, thereby reducing overall device complexity while maintaining reliability improvements where necessary.
2Adaptability or versatility
If different signal configurations are used for different UE types, then adaptability is improved, but system complexity increases
Solution Approach 1:
The patent applies local quality by configuring different signal transmission parameters specifically for different UE types. First-type UEs use repeated transmission configurations with specific subframe offsets and timing relationships, while second-type UEs use simplified configurations without repeated transmissions. This localized customization improves adaptability to different device capabilities without requiring the entire system to become more complex, as each UE type operates with its own optimized parameter set.
Data Source
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AI summary
The present invention relates to a method for performing a random access procedure in a wireless communication system supporting repeated transmission of a same signal, and an apparatus for same, and more specifically, to a method and an apparatus for same, the method comprising: detecting a physical downlink control channel (PDCCH) signal; and transmitting a physical uplink shared channel (PUSCH) signal using an uplink grant, when the PDCCH signal includes the uplink grant, wherein the PUSCH signal is transmitted from a subframe having a first offset from among subframes from which the PDCCH signal has been detected, when user equipment is a first type of user equipment, wherein the PDCCH signal is repeatedly transmitted from a first plurality of subframe sections, when the user equipment is a second type of user equipment, wherein the transmission of the PUSCH signal begins from a subframe capable of starting repeated PUSCH transmission and closest to the last subframe in the first plurality of subframe sections, and wherein the subframe capable of starting repeated PUSCH transmission is determined in advanced through upper layer signaling.