Uplink MIMO Mode Selection via Network Notification
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Solution Overview
Problem
Uplink data transmission speeds and throughput in WCDMA communication systems are insufficient to support high-speed services like mobile multimedia and video conferencing, necessitating improved data transmission modes in User Equipment (UE).
Innovation Solution
A communication method and system that determines whether a UE uses a single-stream or multi-stream mode for uplink data transmission, with a network side device determining and notifying the UE of the appropriate mode based on factors such as data amount, channel quality, scheduling capability, and power, using mechanisms like HS-SCCH orders or E-AGCH grants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink MIMO technology is used to improve data transmission speed, then uplink data speed and throughput increase, but the complexity of determining and managing transmission modes increases
Solution Approach 1:
The network side device automatically determines the appropriate transmission mode (single-stream or multi-stream) and notifies the UE of the indication information, eliminating the need for complex UE-side mode selection algorithms and reducing overall system complexity while maintaining high data transmission speeds
Solution Approach 2:
The patent dynamically adjusts transmission parameters including transport block size, number of transport blocks, and modulation and coding scheme based on channel conditions and UE capability, allowing the system to optimize uplink data speed without requiring complex fixed-mode configurations
2Productivity
If multi-stream mode is used to increase data throughput, then more transport blocks are transmitted, but the requirement for accurate mode determination and notification increases
Solution Approach 1:
The network side device determines the transmission mode based on UE capability information and channel conditions, then notifies the UE of the indication information. The UE feeds back acknowledgment and transmission status, enabling the network to accurately track and adjust the transmission mode to match actual channel conditions and UE capabilities
Solution Approach 2:
The network side device determines the appropriate transmission mode in advance based on UE capability information before actual data transmission begins, and notifies the UE of the indication information, ensuring that the mode selection is accurate and prepared beforehand rather than being determined reactively during transmission
Data Source
AI summary
The present invention discloses a communication method and system using MIMO technology. The communication method includes: a network side device determines whether a UE uses a single-stream mode or a multi-stream mode as an uplink data transmission mode; and the network side device notifies the UE of indication information indicating the determined uplink data transmission mode. The communication method and system help the UE to use a specific uplink data transmission mode in combination with various factors, therefore reducing a delay of an uplink data transmission, improving an uplink data transmission speed, thereby meeting development needs of uplink high-speed data communication services of the UE.