PDCP Reordering Timer Configuration for Wireless Packet Transfer
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing packet data convergence protocol (PDCP) reordering configurations, particularly in ensuring timely and reliable packet transfer while maintaining sequence order.
Innovation Solution
A method for wireless communication where a user equipment (UE) determines during a PDCP reordering timer period whether packet transfer criteria are satisfied, and transfers packets from a reordering window based on these criteria, including considerations such as timer size relative to flow characteristics, loss recovery procedures, and data traffic types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packets are transferred only after the PDCP reordering timer expires, then packet sequence order is maintained, but packet transfer delay increases and packets may be declared lost unnecessarily
Solution Approach 1:
The patent applies preliminary action by evaluating packet transfer criteria before the PDCP reordering timer expires. The UE assesses whether packets meet transfer conditions (such as receiving all packets up to a certain sequence number) and can be transferred in advance, preventing unnecessary timer waiting while maintaining sequence integrity. This resolves the contradiction by enabling early transfer when conditions permit, reducing delay without compromising reliability.
Solution Approach 2:
The patent implements dynamics by making the packet transfer decision adaptive rather than static. Instead of rigidly waiting for timer expiration, the system dynamically evaluates transfer criteria and adjusts transfer timing based on current packet reception status. This allows the system to flexibly transfer packets early when appropriate while still maintaining order when necessary, balancing reliability and delay.
2Stability of the object's composition
If the PDCP reordering timer period is extended to ensure complete packet collection, then packet sequence order is maintained, but packet transfer time increases
Solution Approach 1:
The patent applies preliminary action by determining whether packets can be transferred before the reordering timer expires based on evaluated criteria. When packets meet transfer conditions, the system performs the transfer in advance, eliminating the need for an extended timer period while maintaining sequence order. This resolves the contradiction by achieving stable packet ordering without unnecessarily prolonging the timer duration.
Solution Approach 2:
The patent implements parameter changes by adjusting the effective reordering timer period based on packet transfer criteria evaluation. Rather than using a fixed extended timer, the system modifies the transfer timing parameter dynamically - transferring packets early when criteria are met and waiting when not met. This maintains sequence stability while optimizing the duration of the reordering process.
3Productivity
If packets are transferred early from the reordering window, then packet transfer speed increases, but packet sequence order may be compromised
Solution Approach 1:
The patent applies preliminary action by evaluating specific transfer criteria before allowing early packet transfer. The system checks conditions such as whether all packets up to a certain sequence number have been received, ensuring that early transfer maintains sequence integrity. This resolves the contradiction by enabling faster transfer only when preliminary conditions confirm sequence order will be preserved.
Solution Approach 2:
The patent implements feedback by continuously monitoring packet reception status and using this information to control transfer decisions. The system receives feedback on which packets have been received and uses this to determine whether early transfer is safe, thereby maintaining sequence order while improving transfer speed when appropriate.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine, during a packet data convergence protocol (PDCP) reordering timer period, whether one or more packet transfer criteria are satisfied. The UE may transfer, during the PDCP reordering timer period, one or more packets from a reordering window based at least in part on a determination that the one or more packet transfer criteria are satisfied. Numerous other aspects are provided.