PDCP Reordering Control via Base Station Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication networks, when converting a radio bearer from the second bearer type to the first bearer type, the Packet Data Convergence Protocol (PDCP) entity in a terminal stops reordering data packets prematurely, leading to disordering of packets sent to the upper layer due to incorrect identification of the last data packet that needs to be reordered.
Innovation Solution
A method where a terminal receives instructions from a base station to control data packet reordering, including start or stop flags, serial numbers, or timing durations, to accurately determine when to stop or start reordering data packets, ensuring that all necessary packets are reordered before stopping the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the PDCP entity stops reordering data packets based on the largest serial number received before RLC entity release, then the reordering process can be terminated, but data packets may be disordered because this criterion does not identify the actual last packet needing reordering
Solution Approach 1:
The patent implements a feedback mechanism where the base station sends explicit instructions to the terminal indicating whether to start or stop reordering data packets. The terminal's PDCP entity monitors these instructions and adjusts its reordering behavior accordingly, ensuring that reordering continues until the base station confirms it should stop, thereby maintaining data packet orderliness while allowing efficient termination.
Solution Approach 2:
The base station acts as an intermediary that coordinates the reordering process between the terminal and the network. By sending control instructions, the base station mediates the reordering termination decision, ensuring that the terminal stops reordering at the correct point rather than using an inaccurate local criterion like the largest serial number before RLC release.
2Ease of operation
If the terminal uses automatic reordering termination based on local criteria, then manual control is reduced, but the accuracy of determining when to stop reordering deteriorates
Solution Approach 1:
The system maintains automatic operation while improving accuracy through feedback from the base station. The base station sends instructions that provide precise information about when to stop reordering, allowing the terminal to remain automated while achieving accurate packet identification through the feedback loop between base station and terminal.
Solution Approach 2:
The base station performs preliminary calculation and determination of when reordering should stop, then communicates this information to the terminal in advance. This preliminary action by the base station allows the terminal to execute the stopping decision accurately without needing to independently determine the last packet, thus maintaining automation while improving precision.
Data Source
AI summary
Embodiments of present invention provide a processing method of a data packet, a terminal, a base station and a system, the terminal comprises: a receiving unit, configured to receive a first instruction sent by a first base station; a processing unit, configured to stop reordering data packets according to the first instruction received by the receiving unit, or start reordering the data packets according to the first instruction received by the receiving unit. The technical solutions provided by the embodiments of the present invention are used to achieve that an orderliness of the data packets in the terminal is guaranteed.