EPDCCH-less Control Message Transmission for MTC Devices
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Solution Overview
Problem
Existing mobile broadband networks are not optimized for machine-type communication (MTC) requirements, leading to substantial control overhead and increased power consumption in transmitting common control messages, especially for MTC devices with reduced bandwidth.
Innovation Solution
Implementing EPDCCH-less operation in wireless communication environments, where common control messages are scheduled and transmitted without using PDCCH or EPDCCH, utilizing scheduling information included in master information blocks or system information blocks, and allocating a subset of aggregation levels for blind decoding attempts to reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If common control messages are transmitted using PDCCH or EPDCCH in existing mobile broadband networks, then the control messages can be delivered to MTC devices, but the control overhead and power consumption increase substantially for devices with reduced bandwidth
Solution Approach 1:
The patent extracts the scheduling information from the control channel (PDCCH/EPDCCH) and places it directly into the data channel (PDSCH) along with the common control messages. This removes the need for separate control channel transmission and reception, thereby reducing the power consumption associated with blind decoding attempts while maintaining reliable message delivery.
Solution Approach 2:
The patent merges the control information and data information into a single transmission on the PDSCH. By combining the scheduling information and common control messages into one channel, the system eliminates the separate control channel infrastructure, reducing overall control overhead and power consumption for MTC devices with reduced bandwidth.
2Reliability
If extensive blind decoding attempts are performed to receive common control messages, then the messages can be received reliably, but the power consumption increases substantially
Solution Approach 1:
The patent extracts the scheduling information from the control channel and embeds it in the data channel. This eliminates the need for multiple blind decoding attempts across different aggregation levels, as the UE can directly receive the scheduling information from the PDSCH, thereby improving processing efficiency while maintaining reliable reception.
3Adaptability or versatility
If PDCCH or EPDCCH is used for scheduling common control messages, then the messages can be scheduled flexibly, but the control overhead increases substantially for reduced bandwidth devices
Solution Approach 1:
The patent merges control information and data information into a single PDSCH transmission. This consolidation reduces the control overhead by eliminating separate control channel resources while maintaining scheduling flexibility, as the eNB can still dynamically allocate resources within the PDSCH for MTC devices with reduced bandwidth.
Data Source
AI summary
Embodiments described herein relate generally to a communication between a user equipment (UE) and an evolved Node B (eNB). The UE and eNB may perform enhanced physical downlink control channel (EPDCCH)-less operation for scheduling of one or more common control messages, such as one or more system information blocks (SIBs), a random access response (RAR) message, or a paging message. Additionally, or alternatively, an eNB may configure a subset of aggregation levels for the search space of the UE to use for receiving a physical downlink control channel (PDCCH) or enhanced PDCCH (EPDCCH). Other embodiments may be described and/or claimed.