Multi-Band Communication Device Queue Management for Retransmission
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Solution Overview
Problem
Existing communication systems using multiple bands face challenges in improving retransmission reliability and efficiency, particularly in scenarios where communication failure occurs due to interference or poor propagation characteristics.
Innovation Solution
A communication device and method that employ a queue configuration with a first queue for each band and a second queue common to multiple bands, prioritizing data requiring low delay and high reliability, and storing retransmission data with information about the initial transmission band. This allows for controlled retransmission across multiple bands, avoiding poor communication bands and ensuring redundancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a common queue is equipped for multiple bands, then data transmission flexibility is improved, but data amount to be held on reception side increases
Solution Approach 1:
The patent divides the queue into band-specific queues (first queues) and a common queue (second queue). Each band has its own queue for normal data transmission, while the common queue is specifically used for retransmission data. This segmentation allows the system to maintain flexibility through the common queue while limiting the amount of data that needs to be held by separating retransmission data from normal data flow.
Solution Approach 2:
The patent stores retransmission data in advance in the common queue before actual retransmission occurs. By pre-positioning retransmission data in a dedicated queue with associated band information, the system prepares for potential retransmissions without committing to holding large amounts of data across all bands simultaneously. This preliminary organization reduces the overall data burden on the reception side.
2Device complexity
If independent queues are equipped for each band, then queue management is simplified, but retransmission reliability cannot be improved
Solution Approach 1:
The patent merges the functionality of multiple band-specific queues for retransmission purposes by creating a common second queue that can store retransmission data from any band. This merging allows the system to maintain simple band-specific first queues for normal operation while combining retransmission capabilities in a shared queue, thus improving retransmission reliability without significantly increasing overall system complexity.
Solution Approach 2:
The common second queue serves multiple functions: it stores retransmission data from any band, holds data with high priority requiring low delay, and maintains information about the original transmission band. This multi-functionality allows a single queue structure to improve retransmission reliability across all bands while keeping the overall queue management system relatively simple.
3Stability of the object's composition
If data is retransmitted in the same band, then transmission consistency is maintained, but communication quality cannot be improved
Solution Approach 1:
The patent implements a dynamic retransmission strategy where the system can adaptively choose to retransmit data in the original band or switch to a different band based on communication conditions. The common queue stores retransmission data with information about the original transmission band, enabling the receiver to determine whether to expect retransmission in the same or different band. This dynamic approach maintains transmission consistency when conditions are good while improving communication quality by switching bands when interference is detected.
Data Source
AI summary
There is provided a communication device that transmits a wireless signal using a plurality of bands.The communication device that transmits data in a plurality of bands includes: a first queue for each band that stores data to be transmitted in each band; a second queue common to at least two bands of the plurality of bands, the second queue storing data to be transmitted with high priority; and a control unit that controls transmission of the data stored in the first queue and the second queue. The communication device transmits information regarding the first queue and the second queue. The second queue stores the retransmission data together with information regarding a band of first transmission.