LDPC Codeword Signaling for Ultra High Reliability Wireless Systems
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Solution Overview
Problem
Current wireless communication systems have limitations in supporting longer low-density parity check (LDPC) codewords, which are necessary for achieving higher data rates and lower latencies in ultra high reliability (UHR) systems, due to limited device capabilities and the need for negotiation between devices for long codeword usage.
Innovation Solution
Implementing a method where wireless nodes can indicate support for longer LDPC codewords through signaling and capability information, and determining conditions such as bandwidth, resource unit size, and modulation coding scheme levels to enable the use of longer LDPC codewords, with special fields in the PHY header to indicate codeword lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If longer LDPC codewords are used to achieve higher data rates and lower latencies, then productivity and reliability are improved, but device complexity and the need for negotiation increase
Solution Approach 1:
The patent applies preliminary action by having wireless devices pre-indicate their capability to support longer LDPC codewords through signaling before actual data transmission. This capability indication is established in advance during connection setup or capability exchange, allowing the system to prepare for and utilize longer codewords without requiring complex runtime negotiations, thus improving data rate while managing device complexity.
2Loss of time
If longer LDPC codewords are used to reduce latency, then speed is improved, but the need for capability negotiation and condition checking increases complexity
Solution Approach 1:
The patent reduces latency by establishing capability indication in advance through signaling mechanisms. Devices indicate support for longer LDPC codewords before data transmission begins, eliminating the need for complex runtime negotiations and condition checks. This preliminary capability establishment allows immediate use of optimized codeword lengths, directly reducing transmission latency while managing system complexity.
3Reliability
If longer LDPC codewords are used to enhance reliability, then reliability is improved, but device capability requirements and signaling overhead increase
Solution Approach 1:
The patent enhances reliability by having devices pre-indicate their capability to support longer LDPC codewords through signaling. This capability indication is established in advance, allowing the system to select appropriate codeword lengths that maximize transmission reliability. The preliminary capability exchange enables reliable long codeword transmission without requiring complex runtime capability verification, thus improving reliability while managing device complexity requirements.
Data Source
AI summary
This disclosure provides methods, components, devices and systems for managing long low-density parity check (LDPC) codewords in ultra high reliability (UHR) systems. One method for wireless communication may be performable at a transmitter device or node. The method may include transmitting signaling to a receiver device or node indicating that the transmitter device supports use of a first LDPC codeword length that is greater than or equal to a threshold LDPC codeword length. The method may further include transmitting an LDPC codeword of the first LDPC codeword length (e.g., a long LDPC codeword) to the receiver device when one or more conditions are satisfied.