Orthogonal Cover Codes for Interference-Limited Small Data Transmission
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Solution Overview
Problem
In wireless communication systems, multiplexing of small data transmissions from multiple user equipment (UEs) can cause interference at the network entity, particularly in scenarios where UEs transmit data using the same frequency-time resources, which affects throughput and capacity.
Innovation Solution
Applying an orthogonal cover code (OCC) to small data transmissions (SDT) to multiplex signals orthogonally across repetitions, mitigating interference and enhancing throughput by enabling multiple access schemes for UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple UEs transmit small data using the same frequency-time resources, then resource utilization is improved, but interference at the network entity increases
Solution Approach 1:
The patent applies orthogonal cover codes (OCC) to multiplex small data transmissions from multiple UEs in the time domain across repetitions. By introducing a time-domain dimension for multiplexing rather than only frequency-time resource separation, the system enables multiple UEs to share the same frequency-time resources while maintaining orthogonality through different OCC sequences, thus improving resource utilization without causing interference.
2Productivity
If OCC is applied to multiplex signals across repetitions, then throughput is improved, but system complexity increases
Solution Approach 1:
The patent changes the parameter of signal multiplexing by introducing orthogonal cover codes with specific properties (orthogonality, low complexity generation). The OCC-based multiplexing uses simple sequential assignments of orthogonal codes across time repetitions, avoiding complex modulation or coding schemes. This parameter change enables throughput improvement through efficient resource utilization while keeping the added complexity minimal compared to alternative multiplexing approaches.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit an indication of a capability for supporting an orthogonal cover code (OCC) for small data transmission (SDT). The UE may receive an OCC configuration that indicates a multiplexing order and an OCC codeword for the multiplexing order, and an OCC indication that indicates how to monitor a downlink in association with supporting the OCC for SDT. Numerous other aspects are described.