PDSCH Transmission via Dynamic DM-RS Antenna Port Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication technologies face challenges in selecting DM-RS antenna ports, improving transmission reliability, eliminating interference, increasing MU-MIMO multiplexing capacity, and enhancing frequency selective gain for PDSCH transmission in LTE systems, especially with the introduction of new carriers and CoMP techniques.
Innovation Solution
The method involves determining transmission parameters for the Physical Downlink Shared Channel (PDSCH) based on relevant transmission modes and user information, including resource mapping, DM-RS antenna ports, Scrambling Code Identity (SCID), and scrambling code initialized value X, to dynamically select and utilize multiple DM-RS antenna ports for improved reliability and multiplexing capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single DM-RS antenna port is used for PDSCH transmission, then the system complexity is reduced and backward compatibility is maintained, but transmission reliability is insufficient and interference elimination capability is limited
Solution Approach 1:
The patent segments the DM-RS antenna ports into multiple independent ports (e.g., ports 7, 8, 9, 10) that can be independently selected and configured. This segmentation allows the system to use multiple antenna ports for transmission diversity, thereby improving transmission reliability while maintaining manageable system complexity through modular port configuration.
Solution Approach 2:
The patent introduces dynamic selection of DM-RS antenna ports based on transmission conditions, user equipment capabilities, and interference scenarios. The network can dynamically choose from multiple antenna ports (7, 8, 9, 10) and configure different port combinations adaptively, improving transmission reliability without permanently increasing system complexity.
2Reliability
If multiple DM-RS antenna ports are used for PDSCH transmission, then transmission reliability and interference elimination are improved, but the complexity of determining transmission parameters increases
Solution Approach 1:
The patent changes the parameters of DM-RS antenna ports by introducing new port indices (7, 8, 9, 10) and associated scrambling identities (SCID values). This parameter expansion enables multiple antenna ports to be used simultaneously, improving transmission reliability and interference elimination while the network manages the increased parameter complexity through standardized configuration procedures.
3Productivity
If dynamic selection of DM-RS antenna ports is implemented, then MU-MIMO multiplexing capacity is increased and frequency selective gain is improved, but the complexity of resource allocation and parameter configuration increases
Solution Approach 1:
The patent enables dynamic selection of DM-RS antenna ports and associated parameters (SCID, scrambling initialization values) based on real-time transmission conditions. This dynamic approach allows the system to adaptively optimize MU-MIMO multiplexing capacity and frequency selective gain while the network manages configuration complexity through standardized procedures and UE-assisted feedback mechanisms.
Solution Approach 2:
The patent incorporates feedback mechanisms where the UE reports channel state information and interference conditions, enabling the network to dynamically select optimal DM-RS antenna ports and configuration parameters. This feedback-driven approach increases MU-MIMO multiplexing capacity while managing resource allocation complexity through informed decision-making based on actual channel conditions.
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Disclosed is a physical downlink shared channel transmission method, and the method includes: a network side determines transmission parameters of a Physical Downlink Shared Channel (PDSCH) according to a relevant transmission mode of a DM-RS and/or relevant information of a scheduled UE, wherein the transmission parameters include one or more of: a resource mapping approach of the PDSCH, a downlink DM-RS antenna port in use, and a Scrambling Code Identity (SCID) and a scrambling code initialized value X desired when a downlink DM-RS port sequence is initialized; and the network side transmits data according to the determined antenna parameters of the PDSCH. Further disclosed is a physical downlink shared channel transmission system. The disclosure can implement selection of DM-RS antenna ports and use multiple DM-RS antenna ports to improve transmission reliability, eliminate interference, increase MU-MIMO multiplexing capacity and improve frequency selective gain.