Shared-Resource Multi-User Data Transmission With Adaptive Sub-Codewords

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Solution Overview

Problem

Conventional wireless communication networks face challenges in managing access requests from a large number of user devices, leading to performance degradation and increased access delays, especially in scenarios with hundreds or thousands of devices, due to the inefficiencies in contention-based random access procedures and the inability to adapt transmission rates to individual channel conditions.

Innovation Solution

A communication scheme that allows user devices to transmit non-orthogonal information-bearing sequences over shared channel resources, using compressed sensing-based detection algorithms and feedback mechanisms to adjust transmission rates and lengths, enabling seamless adaptation to channel conditions and improving detection probability, while employing approximate message passing algorithms for efficient multi-user detection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If contention-based random access procedures are used to manage access requests from multiple user devices, then the system can handle basic access requests, but performance degrades and access delays increase when hundreds or thousands of devices attempt to access simultaneously

Engineering Contradiction:

Improvenetwork throughputVSAvoidaccess delays

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent implements dynamic transmission rates that adapt to individual channel conditions. The base station monitors channel quality indicators from each user device and adjusts the transmission rate accordingly, allowing the system to dynamically optimize performance based on real-time conditions rather than using fixed contention-based access parameters

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes key parameters including transmission rate, resource allocation, and modulation schemes based on channel conditions. By adjusting these parameters dynamically for each user device, the system maintains high throughput even with massive numbers of concurrent access requests, resolving the contradiction between handling many users and maintaining low delay

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If conventional transmission schemes are used, then the system can transmit data from multiple users, but it cannot adapt transmission rates to individual channel conditions

Engineering Contradiction:

Improveadaptation to channel conditionsVSAvoidnetwork throughput

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system employs feedback mechanisms where user devices report channel quality indicators to the base station. This feedback loop enables the base station to make informed decisions about resource allocation and transmission rate adjustment, achieving both adaptability to channel conditions and high network throughput simultaneously

Inventive Principle:

Principle #23Feedback

3Productivity

If shared channel resources are used for multiple users, then resource utilization improves, but detection probability decreases due to interference from non-orthogonal sequences

Engineering Contradiction:

Improveresource utilizationVSAvoiddetection probability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent replaces traditional orthogonal signaling mechanisms with compressed sensing-based detection. Instead of relying on orthogonal sequences that require separate resources, the system uses mathematical transformation techniques to separate and detect non-orthogonal signals from multiple users, maintaining high resource utilization while improving detection probability through advanced signal processing

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system changes the detection methodology from traditional correlation-based detection to compressed sensing-based detection. This parameter change in the detection algorithm enables reliable identification of user signals even when using non-orthogonal sequences, resolving the contradiction between resource utilization and detection reliability

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP3688879B1Transmission of data by multiple users over shared resources

Publication Date: 2024.06.12 FRAUNHOFER GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG EV

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AI summary

A transmitter (UE) for transmitting data to a receiver (BS) of a wireless communication network, the transmitter (UE) includes at least one antenna, a codebook, an encoder, and a transceiver coupled to the encoder and to the at least one antenna. The codebook includes a plurality of codewords, each codeword being a vector including a plurality of symbols, each symbol to be transmitted over resources of the wireless communication network. The encoder is configured to receive an information message to be transmitted to a receiver (BS) of the wireless communication network, to select from the codebook the codeword associated with the received information message, and to divide the selected codeword into a plurality of sub-codewords. The transceiver is configured to transmit via the at least one antenna a first sub-codeword, and to transmit via the at least one antenna a second sub-codeword responsive to an indication that the encoded information message was not successfully decoded at the receiver (BS) on the basis of the received first sub-codeword.