Configurable MTC Subframes for Low Latency Wireless
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Solution Overview
Problem
Current wireless communication technologies face challenges in meeting the low delay requirements of machine-type communications (MTC) applications, as the standard uplink data transmission process is too lengthy for applications like smart grids and intelligent transportation.
Innovation Solution
The method involves configuring MTC subframes with a reduced number of symbols based on the transmission delay requirements, allowing for efficient uplink and downlink resource allocation, and using existing communication specifications to minimize system changes and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the standard uplink data transmission process is used, then system compatibility is maintained, but transmission delay becomes too long for MTC applications
Solution Approach 1:
The patent applies dynamics by making the subframe structure configurable and adaptable. The base station can dynamically adjust the number of symbols in MTC subframes based on service requirements, transitioning from a fixed standard subframe structure to a flexible configurable structure that optimizes transmission delay while maintaining system compatibility through controlled deviations.
Solution Approach 2:
The patent changes the parameter of subframe symbol quantity from the standard 14 symbols to a configurable number (1-14 symbols) specifically for MTC services. This parameter change enables shorter transmission delays for delay-sensitive MTC applications while maintaining compatibility with existing LTE infrastructure through selective application to specific service types.
2Loss of time
If MTC subframes with reduced symbols are introduced, then transmission delay is reduced, but system complexity increases
Solution Approach 1:
The patent segments the subframe structure into different types: standard subframes for conventional services and MTC subframes with configurable symbol quantities for MTC services. This segmentation allows the system to maintain standard operations for most traffic while introducing optimized structures only where needed, thereby reducing overall system complexity impact.
Solution Approach 2:
The patent creates a universal subframe configuration mechanism that can handle both standard and MTC services through a single configurable framework. The base station uses unified resource allocation procedures and signaling mechanisms that work for both standard and MTC subframes, reducing the need for separate complex handling paths.
3Loss of time
If flexible MTC subframe configuration is implemented, then delay requirements are met, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by introducing flexible subframe configuration only for MTC services rather than all services. The base station selectively applies MTC subframe structures only when MTC traffic is detected, maintaining standard subframes for other services, thereby minimizing the signaling overhead impact to only the necessary MTC contexts.
Data Source
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AI summary
The present invention discloses a communication method, including: obtaining, by a base station, resource configuration information of a machine type communications MTC service, where the resource configuration information of the MTC service includes at least one of information about an uplink MTC resource or information about a downlink MTC resource; sending, by the base station, the resource configuration information of the MTC service to an MTC terminal; and performing, by the base station, MTC service transmission with the MTC terminal by using an MTC subframe in the uplink MTC resource and/or the downlink MTC resource. According to the method, delay requirements of the MTC service can be satisfied, and communication quality of the MTC service can be ensured.