DCI Bit Determination for Paging Early Indication
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Solution Overview
Problem
In existing wireless communication technologies, user equipment (UE) needs to frequently wake up to monitor paging messages, leading to high energy consumption, especially in idle states. The current paging early indication (PEI) mechanism requires UE to wake up before the paging occasion, which is inefficient.
Innovation Solution
The method involves determining the number of bits of downlink control information (DCI) for carrying a paging early indication (PEI) based on a specific search space. This allows for efficient transmission and reception of PEI, reducing blind detection overhead and improving detection performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE wakes up in each paging cycle to monitor paging messages, then the UE can receive paging information reliably, but the energy consumption increases significantly
Solution Approach 1:
The patent introduces a paging early indication (PEI) mechanism that is transmitted before the actual paging message. The PEI provides advance notification to the UE about the presence of paging messages, allowing the UE to remain in idle state longer and only wake up when necessary. This preliminary indication action resolves the contradiction by enabling reliable paging reception while reducing unnecessary wake-ups and energy consumption.
Solution Approach 2:
The patent introduces downlink control information (DCI) as an intermediary carrier for the PEI. The DCI scrambled by P-RNTI serves as a mediator between the network and the UE, conveying paging indication information in a standardized control channel format. This intermediary mechanism enables efficient paging notification while maintaining compatibility with existing wireless communication protocols.
2Reliability
If the UE wakes up before the paging occasion to monitor paging messages, then the paging can be received, but the energy consumption increases due to extended wake time
Solution Approach 1:
The PEI mechanism provides preliminary notification before the paging occasion, allowing the UE to precisely time its wake-up. Instead of waking up early and waiting, the UE can wake up exactly when the PEI is transmitted, reducing the wake-up time duration while ensuring reliable paging message detection.
3Device complexity
If the number of bits for DCI carrying PEI is not optimized, then the DCI structure remains simple, but the blind detection overhead increases
Solution Approach 1:
The patent optimizes the number of bits for DCI carrying PEI based on the actual paging indication requirements. By carefully selecting and configuring the bit fields in the DCI structure, the patent achieves efficient paging indication while minimizing the total DCI size. This parameter optimization reduces blind detection overhead without significantly increasing DCI structural complexity.
Data Source
AI summary
A method for determining downlink control information (DCI) is executed by a network device, and comprises: on the basis of a first search space, determining the number of bits of DCI which is used for bearing a paging early indication (PEI), wherein the first search space is a search space for transmitting the DCI which is used for bearing the PEI.