MU-MIMO Mode Indication via HS-SCCH Segmentation
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Solution Overview
Problem
There is a need to effectively notify User Equipment (UE) in a UMTS system when it is configured with the MU-MIMO mode, as existing technologies lack a clear method for indicating this configuration.
Innovation Solution
The method involves constructing and sending specific first and second part information through an HS-SCCH, using various formats such as HS-SCCH type 3 single stream and dual-stream combinations, or a seventh bit of channelization-code-set information to indicate the MU-MIMO mode, allowing the UE to determine its configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MU-MIMO technology is applied in a UMTS system to increase data transport rate, then the data rate is improved, but there is no clear method to notify UE of its MU-MIMO mode configuration
Solution Approach 1:
The control information on HS-SCCH is segmented into a first part and a second part. The first part contains indication information for the MU-MIMO mode configuration, while the second part contains other control information. This segmentation allows the UE to clearly identify and extract the MU-MIMO configuration status without confusion from other control data.
Solution Approach 2:
The patent introduces an intermediary indication mechanism using specific bit fields within the HS-SCCH message structure. A predetermined bit in the first part of the control information serves as an intermediary indicator that explicitly conveys the MU-MIMO mode configuration status to the UE, bridging the gap between the base station's configuration decision and the UE's operational state.
2Adaptability or versatility
If existing HS-SCCH formats are used without modification, then system compatibility is maintained, but there is no capability to indicate MU-MIMO mode configuration
Solution Approach 1:
Instead of modifying the entire HS-SCCH format structure, the patent applies local quality change by selectively utilizing a predetermined bit field within the existing first part of the control information. This bit field is repurposed to carry the MU-MIMO mode indication, leaving the rest of the control information structure unchanged and maintaining overall system compatibility while adding the new capability.
Solution Approach 2:
The first part of the HS-SCCH control information is designed to serve multiple functions: it carries both traditional control information and the new MU-MIMO mode indication. This multi-functionality allows the existing control channel to accommodate the new capability without requiring separate dedicated signaling channels, thereby avoiding increased system complexity.
Data Source
AI summary
The present invention relates to the field of telecommunications, and discloses a method for indicating an MU-MIMO mode. In this method, first part information and second part information are constructed and sent, where formats of the first part information and the second part information indicate an MU-MIMO mode. The present invention further discloses an apparatus for indicating an MU-MIMO mode. With the method and apparatus for indicating an MU-MIMO mode, where the method and apparatus for indicating an MU-MIMO mode are disclosed in the present invention, a UE may be notified of being configured with an MU-MIMO mode when MU-MIMO is applied in a UMTS system.