Evolved Data Compression for Unreliable Wireless Links
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Solution Overview
Problem
Wireless communication systems face disruptions due to unreliable transmission modes, where lost packets over less reliable connections, such as Wi-Fi, can cause decompression failures and service disruptions in user equipment (UEs) due to reliance on in-sequence delivery of compressed packets.
Innovation Solution
Implementing an evolved data compression scheme where packets are selectively transmitted using different compression modes based on connection reliability, with reliable connections using compressed packets for buffer updates and unreliable connections using uncompressed or specially managed compressed packets to prevent buffer synchronization issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If compressed packets are sent over unreliable connections, then bandwidth efficiency is improved, but packet loss causes decompression failures and service disruption
Solution Approach 1:
The patent segments the transmission path into reliable and unreliable connections, applying different compression strategies to each. Compressed packets are sent only over reliable connections where buffer synchronization can be maintained, while unreliable connections use uncompressed or independently compressible packets, preventing decompression failures.
Solution Approach 2:
Different compression modes are applied to different transmission paths based on their reliability characteristics. The reliable connection receives full compression benefits while the unreliable connection uses compression modes that don't depend on buffer state, optimizing both bandwidth efficiency and reliability for each path.
2Productivity
If compression buffer is updated with every packet, then compression efficiency is improved, but packet loss causes buffer synchronization loss
Solution Approach 1:
The patent prepares alternative transmission paths and compression modes in advance. When a reliable connection is available, compressed packets update the buffer as usual. When the unreliable connection is detected or packet loss occurs, the system switches to pre-configured uncompressed or independent compression modes, avoiding buffer synchronization issues.
Solution Approach 2:
The patent introduces an intermediary mechanism (the packet selection and transmission controller) that mediates between the compression buffer and the transmission paths. This intermediary prevents direct updates to the buffer from unreliable connections, allowing compression efficiency to be maintained on reliable paths while protecting buffer synchronization from corruption.
3Reliability
If uncompressed packets are sent over reliable connection, then robustness is improved, but bandwidth utilization decreases
Solution Approach 1:
The patent dynamically selects compression modes based on connection reliability and packet loss conditions. Rather than statically choosing uncompressed for reliable connections, the system adaptively applies compression when conditions permit, maximizing bandwidth utilization while maintaining robustness through dynamic adjustment of transmission parameters.
Data Source
AI summary
Methods, systems, and devices are described for wireless communication at a device. A transmitting device such as a base station may select some packets for direct transmission to a receiving device using data compression based on the reliability of the direct connection. The transmitting device may select other packets for indirect transmission via an unreliable connection using uncompressed packets or compressed packets that will not be used to update a compression buffer. In some cases, uncompressed packets may also be sent via the reliable connection. If a packet sent over the unreliable connection is lost, it may be transmitted over the reliable connection.