Multi-Link Wireless Replication with STR Capability Announcement
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Solution Overview
Problem
Current techniques for performing replicated transmissions over multiple wireless links in WLAN technology are inefficient and resource-intensive, leading to issues such as cross-channel self-interference and strict synchronization requirements, which affect throughput and latency.
Innovation Solution
A method for controlling wireless transmissions that involves maintaining multiple wireless links and announcing replicated transmissions between devices, allowing for adaptive operation and overriding strict synchronization requirements, thereby reducing resource usage and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If simultaneous transmit and receive (STR) MLO is performed over multiple channels, then throughput and spectrum utilization are improved, but cross-channel self-interference occurs due to leakage from TX to RX channels
Solution Approach 1:
The patent segments the wireless communication system into multiple independent links, each with its own TX/RX chains. By dividing the MLO operation into separate link-level operations, the system can manage interference at the link level while maintaining overall high throughput through coordinated multi-link operation.
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of a STR capability indicator and link classification system. This intermediary allows devices to announce their STR capabilities and enables the system to classify links as STR or NSTR, facilitating adaptive operation that avoids self-interference while maintaining throughput.
2Object-affected harmful factors
If transmissions over multiple channels are synchronized to prevent cross-channel self-interference, then self-interference is reduced, but strict synchronization requirements increase device complexity and reduce operational flexibility
Solution Approach 1:
The patent implements dynamic link classification where links are categorized as STR or NSTR based on capability announcements and operational conditions. This dynamic approach allows the system to adapt synchronization requirements to actual device capabilities and channel conditions, reducing complexity while maintaining interference management.
Solution Approach 2:
The patent changes the parameter of synchronization strictness based on link classification. STR links operate with relaxed synchronization requirements, while NSTR links implement stricter synchronization. This parameter adaptation allows the system to manage interference effectively without imposing uniform complex synchronization requirements across all links.
3Reliability
If replicated transmissions are performed over multiple links without announcement, then reliability is improved through diversity, but resource usage increases and latency increases due to redundant transmissions
Solution Approach 1:
The patent applies preliminary action by announcing replicated transmissions before they occur. The transmitting device informs the receiving device about upcoming replicated transmissions on multiple links, allowing the receiver to prepare for and efficiently process the replicated data, thereby reducing latency while maintaining reliability.
Solution Approach 2:
The patent implements feedback mechanisms where receiving devices acknowledge received replicated transmissions. This feedback allows transmitting devices to stop further replicated transmissions once acknowledgment is received, preventing unnecessary resource usage and reducing latency by eliminating redundant transmissions.
4Reliability
If frame replication is used to increase reliability, then data transmission reliability is improved, but resource consumption and power usage increase due to multiple transmissions
Solution Approach 1:
The patent applies partial action by selectively replicating transmissions only when necessary, based on link conditions and device capabilities. Rather than always transmitting on all links, the system performs replicated transmissions only on links that can contribute to reliability improvement, thereby reducing power consumption while maintaining reliability.
Solution Approach 2:
The patent implements a mechanism where receiving devices discard duplicate replicated transmissions after acknowledging the first received copy. This allows the system to recover from the initial power expenditure by eliminating redundant processing and transmission of duplicate data, effectively reducing overall power consumption.
Data Source
AI summary
A wireless communication device (21) maintains a first wireless link and a second wireless link communicates, between the wireless communication device (21) and the further wireless communication device (22), an announcement of replicated transmissions of data on the first wireless link and the second wireless link. Further, the wireless communication device (21) sends the replicated transmissions (201, 202, 203) of the data on the first wireless link and the second wireless link.