Uplink SPS PUSCH Data Type Identification via Scrambling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face inefficiencies in uplink transmission, particularly in managing semi-persistent scheduling (SPS) configurations, where distinguishing between new and retransmission data is challenging, leading to suboptimal resource allocation and increased latency.
Innovation Solution
A method and apparatus for user equipment (UE) in a wireless communication system that receives SPS configuration information and transmits PUSCH data with indication information, using a 1-bit indicator, PRB index, DMRS sequence, or scrambling sequence to differentiate between new and retransmission data, allowing for efficient periodic transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If SPS configuration is used for periodic uplink transmission, then resource allocation efficiency is improved, but difficulty in distinguishing new data from retransmission data increases
Solution Approach 1:
The patent uses different scrambling sequences (analogous to color changes) to mark different data types. New SPS data and retransmission SPS data are scrambled with distinct sequences, enabling the base station to easily identify data type through sequence detection without complex signaling overhead.
Solution Approach 2:
The patent introduces an intermediary indicator field within the SPS configuration that carries data type information. This intermediary element mediates between the transmission content and the receiver's interpretation, allowing clear distinction between new and retransmission data while maintaining efficient periodic scheduling.
2Measurement precision
If indication information is added to PUSCH to identify data type, then data transmission accuracy is improved, but device complexity increases
Solution Approach 1:
The patent merges the indication information directly into the existing PUSCH structure by utilizing available fields (such as scrambling sequence selection or indicator bits within the transport block). This integration approach provides accurate data type identification without requiring separate signaling channels or complex additional processing architecture.
Solution Approach 2:
The patent changes existing transmission parameters (such as scrambling sequence initialization values or redundancy version selection) to encode data type information. By repurposing existing parameters rather than introducing new ones, the system achieves precise identification while minimizing increases in device complexity.
3Reliability
If SPS retransmission resource allocation is implemented, then transmission reliability is improved, but latency increases
Solution Approach 1:
The patent performs preliminary configuration of SPS parameters including periodicity, resource allocation, and data type indicators during initial setup. By pre-configuring all necessary information including retransmission parameters, the system enables rapid retransmission without requiring extensive negotiation or resource allocation procedures at the time of retransmission, thus reducing latency while maintaining reliability.
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
The present invention relates to a wireless communication system. Specifically, the present invention relates to a method comprising the steps of: receiving uplink semi-persistent scheduling (SPS) configuration information; and transmitting a physical uplink shared channel (PUSCH) in a subframe which is periodically configured according to the uplink SPS configuration information, wherein the PUSCH includes indication information indicating whether data of the PUSCH is new SPS data or retransmission SPS data, and an apparatus therefor.