5G Paging Retransmission Feedback for Reliable UE Reception
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing demand for wireless data traffic in 5G communication systems poses challenges in radio interface efficiency and coverage, particularly in higher frequency bands, where propagation loss and interference are significant issues.
Innovation Solution
Implementing beamforming, massive MIMO, and advanced antenna techniques to enhance transmission and reception performance, along with feedback-based paging mechanisms to improve paging reception and transmission in 5G/NR systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beamforming and massive MIMO are implemented to improve coverage and transmission performance in higher frequency bands, then propagation loss and interference are mitigated, but device complexity and system configuration complexity increase
Solution Approach 1:
The patent implements feedback-based paging retransmission where the UE sends ACK/NACK feedback for paging messages. When NACK is detected (paging not successfully decoded), the BS retransmits the paging message using the same or different resources. This feedback mechanism improves paging reception reliability by enabling automatic retransmission without requiring complex higher-layer protocols.
Solution Approach 2:
The patent segments the paging process into distinct phases: initial paging transmission, feedback reception, and conditional retransmission. By dividing the paging mechanism into separate controllable stages with clear success/failure criteria, the system manages complexity through modular design while maintaining high reliability through targeted retransmissions.
2Reliability
If feedback-based paging retransmission is implemented to ensure successful decoding, then paging reliability improves, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent extracts the essential feedback function from complex higher-layer protocols and implements it at the physical layer using simple ACK/NACK signals. By taking out only the critical reliability-enhancing feedback mechanism and implementing it independently with minimal overhead, the system achieves high decoding success rates without the burden of extensive signaling protocols.
Solution Approach 2:
The patent discards the assumption that paging transmission must be perfectly successful on the first attempt, and instead recovers from failures through structured retransmissions. The system deliberately allows initial transmission failures and recovers reliability through controlled retransmission cycles, reducing the need for excessive initial redundancy.
3Reliability
If paging retransmission requests are transmitted to ensure message delivery, then coverage is enhanced, but uplink resource consumption and network load increase
Solution Approach 1:
The patent implements periodic paging retransmissions where the BS retransmits paging messages at predetermined intervals based on feedback. This periodic action pattern allows the system to enhance coverage through multiple transmission opportunities while controlling uplink resource consumption by using structured, time-spaced retransmissions rather than continuous or excessive transmissions.
Solution Approach 2:
The patent performs preliminary assessment of paging decoding success through feedback before initiating retransmission. By preliminarily determining whether retransmission is actually needed (through NACK detection), the system avoids unnecessary uplink resource consumption while ensuring reliable delivery only when genuinely required.
Data Source
AI summary
A user equipment (UE) includes a transceiver configured to receive, from a base station (BS), during a paging occasion (PO), first downlink control information (DCI) addressed to a paging radio network temporary identifier (P-RNTI), and receive, from the BS, a downlink (DL) transport block (TB) for paging scheduled by the first DCI. The UE also includes a processor operably coupled to the transceiver. The processor is configured to decode the DL TB for paging, determine whether the DL TB for paging is successfully decoded, and in response to a determination that the DL TB for paging is not successfully decoded, cause the transceiver to transmit, to the BS, a request for a paging retransmission.