Paging Repetition for Robust Extended Paging Cycles
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Solution Overview
Problem
In wireless communication systems, paging messages may be lost due to varying wireless conditions, leading to unreliable reception and increased power consumption in user equipment (UE) as it perpetually monitors for signals, especially with extended paging cycles that result in unacceptably long delays between message transmission and retransmission.
Innovation Solution
Increasing the number of paging opportunities within an extended paging cycle by transmitting paging messages in multiple subframes of a paging frame, allowing the UE to detect the message in subsequent opportunities without waiting for the next cycle, and using a lookup table to determine these opportunities based on an index and indication of subframes for paging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If paging messages are transmitted in a single subframe with extended paging cycles, then power consumption is reduced, but reliability of message delivery deteriorates due to long delays and potential message loss
Solution Approach 1:
The paging message transmission is segmented across multiple subframes within the extended paging cycle. Instead of transmitting a single paging message in one subframe, the system divides the transmission into multiple opportunities (e.g., subframes 0, 4, 5, 9), allowing the UE to receive the message at any of these segmented transmission points, thereby maintaining reliability while preserving power savings from extended cycles.
Solution Approach 2:
The system pre-configures multiple paging opportunities within the extended paging cycle before the actual paging event occurs. The UE is informed in advance about the possible subframes where paging messages may be transmitted, allowing it to prepare for reception at these predetermined points without continuously monitoring, thus balancing power consumption with reliable message delivery.
2Use of energy by moving object
If the paging cycle is extended to reduce monitoring frequency, then power consumption decreases, but the delay between message transmission and retransmission becomes unacceptably long
Solution Approach 1:
The extended paging cycle is segmented into multiple paging opportunities across different subframes. This segmentation ensures that even though the overall cycle is extended for power savings, the actual time between transmission attempts is reduced by distributing messages across multiple subframes, preventing unacceptably long delays.
Solution Approach 2:
The system implements periodic paging opportunities within the extended cycle at predetermined intervals (e.g., every few subframes). This periodic structure allows the UE to know when to wake up and monitor for paging messages, maintaining regular communication节奏 while extending the overall cycle for power conservation.
3Reliability
If multiple paging opportunities are introduced within an extended cycle, then reliability of message delivery improves, but device complexity increases due to additional monitoring requirements
Solution Approach 1:
The UE is provided with pre-configured information about paging opportunities (e.g., through system information blocks or RRC signaling) before entering idle mode. This preliminary configuration includes the specific subframes where paging may occur and the parameters for calculating these opportunities, allowing the UE to simply follow a predetermined monitoring schedule without complex real-time calculations, thus improving reliability while minimizing complexity.
Solution Approach 2:
The UE autonomously calculates its paging opportunities using provided parameters (such as UE_ID, paging cycle length, and subframe offsets) without requiring network control for each individual paging event. This self-service approach allows multiple paging opportunities to be handled automatically by the UE's internal logic, improving reliability through multiple monitoring points while avoiding the complexity of network-coordinated scheduling for each opportunity.
Data Source
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AI summary
Embodiments described herein relate generally to a reliable delivery of a paging message in a wireless network environment. To prevent the unacceptable delay of delivery of a paging message to a UE, the number of paging opportunities that are to occur during a paging cycle may be increased. The UE may access a lookup table that indicates the paging opportunities for the paging cycle. The paging opportunities may correspond to subframes of the paging frame that include a paging message. The UE may then detect the paging message in a respective subframe of the paging frame that corresponds with a paging opportunity. Other embodiments may be described and claimed.