Terminal-Aided Backhaul Compression via Distributed Storage
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Solution Overview
Problem
In wireless networks, the backhaul link faces inefficiencies due to redundant transmission of the same information, leading to increased storage requirements at base stations, which can be exacerbated by the need to resend messages when message labels match but the messages do not, wasting scarce backhaul resources.
Innovation Solution
Distributing the receiving node's storage function to wireless terminals, allowing the base station to delegate message storage and retrieval via the wireless link, thereby reducing the storage burden on the base station and optimizing backhaul resource usage by leveraging terminal-aided compression techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station maintains all message storage locally, then message retrieval is fast and reliable, but storage requirements and device complexity increase significantly
Solution Approach 1:
The patent segments the message storage function by dividing the storage burden between the base station and user equipment. The base station maintains label sets and message metadata, while user equipment stores actual message content. This segmentation reduces base station complexity while maintaining system-wide reliability for message retrieval.
Solution Approach 2:
The patent introduces user equipment as an intermediary component that holds message storage. Instead of the base station directly maintaining all messages, user equipment acts as a distributed storage intermediary, allowing the base station to retrieve messages through coordinated communication without bearing the full storage burden.
2Device complexity
If the base station delegates storage to user equipment, then storage burden on base station is reduced, but communication overhead on wireless link increases
Solution Approach 1:
The patent applies preliminary action by having user equipment pre-store message content before it is needed for retrieval. Messages are cached in user equipment memory in advance, so when the base station needs to retrieve a message, the content is already available locally, eliminating the need for redundant wireless transmissions and reducing communication overhead.
Solution Approach 2:
The patent uses copying by creating local copies of message content in user equipment memory. Instead of repeatedly transmitting the same message over the wireless link, the system creates and maintains copies at the user equipment level, reducing wireless communication overhead while enabling fast retrieval when needed.
3Productivity
If compression ratio N/K is increased, then backhaul transmission efficiency improves, but ambiguity cases increase where message labels match but messages do not
Solution Approach 1:
The patent uses user equipment as an intermediary verification layer. When the base station retrieves a message label from its storage and needs to transmit it, the system checks whether the corresponding message content exists in user equipment memory. This intermediary check resolves ambiguity by verifying message-label correspondence before transmission, maintaining reliability even with high compression ratios.
Solution Approach 2:
The patent implements feedback mechanisms where the system monitors for ambiguity cases where message labels match but messages do not. When such cases are detected, the system uses feedback to trigger corrective actions, such as refreshing the message cache in user equipment or adjusting the compression strategy, thereby maintaining message identification accuracy despite high compression ratios.
Data Source
AI summary
A delegate wireless terminal can receive and store messages sent to it by a receiving network node. The wireless terminal can identify a message label based on a mapping for the received message. A transmitting network node can transmit a message label to a receiving network node across a backhaul link. The receiving network node can transmit a message label to the wireless terminal. The wireless terminal can identify a stored message that corresponds to the received message label, and send the corresponding message to the receiving network node. The receiving network node can then transmit the message to its intended destination.