Access Point Buffer Synchronization for Joint Transmission Packets
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Solution Overview
Problem
In wireless local area networks with multiple access points, existing technologies face challenges in coordinating packet management across APs for Joint Tx, leading to incorrect data signals due to mismatched sequence numbers and buffer stagnation during cooperative transmission.
Innovation Solution
A communication apparatus and method that shares and updates sequence number information between APs through a master AP, ensuring synchronized packet management and buffer handling for correct Joint Tx execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If each AP independently manages packets and assigns sequence numbers, then packet processing is simple and independent, but sequence numbers become mismatched across APs causing incorrect data signals for Joint Tx
Solution Approach 1:
The patent introduces a master AP as an intermediary that coordinates sequence number management among multiple APs. The master AP collects packet information from all APs, assigns unified sequence numbers, and distributes them back to ensure consistency across the network while maintaining independent packet processing at each AP.
Solution Approach 2:
The patent implements a feedback mechanism where APs report their packet buffer status and sequence number information to the master AP. The master AP processes this feedback, determines appropriate sequence numbers, and sends control information back to APs to maintain synchronized packet management for Joint Tx operations.
2Reliability
If APs share and synchronize transmission buffer information, then correct data signals can be generated for Joint Tx, but communication complexity and processing overhead increase
Solution Approach 1:
The patent segments the buffer synchronization process into distinct components: individual APs maintain their own transmission buffers independently, while the master AP collects and coordinates sequence number information. This segmentation allows each AP to process packets independently while still achieving coordinated Joint Tx through centralized sequence number management.
3Stability of the object's composition
If sequence number information is shared between APs, then packet management can be synchronized, but communication overhead and processing time increase
Solution Approach 1:
The patent implements preliminary action by having the master AP collect packet information from all APs before Joint Tx operations begin. Sequence numbers are assigned and distributed in advance, allowing APs to prepare their transmission buffers ahead of time. This preliminary coordination reduces real-time processing requirements during actual Joint Tx execution.
Data Source
AI summary
There is provided a communication apparatus that operates as an access point (AP) that transmits packets to a subordinate station (STA) and an STA connected to another AP includes a storage unit including a transmission buffer that stores packets for each STA, and a control unit that controls processing for sharing information on a sequence number of a transmission buffer for each STA between the APs. The control unit collects the information on the sequence number of the transmission buffer of each STA of each AP, and controls processing for transmitting packets to each STA on the basis of a difference in information related to the sequence number of the transmission buffer of each STA between the APs.