Uplink SRS Configuration for CoMP Channel Measurement
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Solution Overview
Problem
In CoMP systems, existing technologies face challenges in efficiently transmitting an uplink Sounding Reference Signal (SRS) that is independent from the physical cell ID, which is necessary for accurate uplink channel measurement and downlink beamforming, especially when multiple T/R points with different cell IDs are involved.
Innovation Solution
A method and apparatus for a User Equipment (UE) to receive UE-specific configuration information for an uplink reference signal ID that is independent from the physical cell ID, generate an SRS using this ID, and transmit it to a designated T/R point, allowing for independent SRS transmission targeting different T/R points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the SRS transmission is tied to the physical cell ID of the serving T/R point, then the system maintains simple cell-specific reference signal configuration, but the UE cannot transmit SRS to other T/R points for accurate uplink channel measurement in CoMP scenarios
Solution Approach 1:
The patent segments the reference signal configuration into cell-specific parameters (physical cell ID) and UE-specific parameters (uplink reference signal ID). This allows the SRS to be independently configured for different T/R points, enabling the UE to transmit SRS to multiple T/R points with different uplink reference signal IDs while maintaining simple cell-specific configuration. The segmentation resolves the contradiction by separating the measurement precision requirement (needing multiple T/R point configurations) from the configuration simplicity requirement (using standardized cell-specific parameters).
Solution Approach 2:
The patent introduces an uplink reference signal ID as an intermediary parameter that bridges the physical cell ID and the SRS transmission. This intermediary allows the system to maintain the simple physical cell ID configuration while enabling flexible SRS transmission to different T/R points. The uplink reference signal ID acts as a mediator that decouples the SRS transmission from the serving T/R point's physical cell ID, resolving the contradiction between measurement precision and configuration complexity.
2Productivity
If the SRS uses the serving T/R point's physical cell ID for generation, then the configuration is simplified, but the SRS cannot be independently directed to different T/R points for frequency dependent scheduling
Solution Approach 1:
The patent segments the SRS configuration into cell-specific physical cell ID and UE-specific uplink reference signal ID. This segmentation enables the SRS to be independently configured for different T/R points, allowing frequency dependent scheduling to efficiently utilize channel state information from multiple T/R points. The UE-specific uplink reference signal ID provides the flexibility needed for productivity improvement while maintaining simple cell-specific configuration.
Solution Approach 2:
The patent changes the parameter used for SRS generation from the serving T/R point's physical cell ID to a UE-specific uplink reference signal ID. This parameter change enables the SRS to be independently directed to different T/R points, improving frequency dependent scheduling efficiency. The parameter change resolves the contradiction by providing the necessary flexibility for productive CoMP operations without significantly increasing configuration complexity, as the uplink reference signal ID follows standardized configuration patterns.
3Adaptability or versatility
If multiple T/R points use different cell IDs, then the system supports heterogeneous network deployment, but the UE cannot transmit cell-specific uplink reference signals to different T/R points using existing technologies
Solution Approach 1:
The patent segments the reference signal configuration to include both cell-specific physical cell ID and UE-specific uplink reference signal ID. This segmentation enables reliable uplink reference signal transmission to multiple T/R points in heterogeneous networks. Each T/R point can be identified by a unique uplink reference signal ID, ensuring reliable transmission while maintaining adaptability to different network deployments with different cell IDs.
Solution Approach 2:
The patent introduces the uplink reference signal ID as an intermediary that enables reliable communication between the UE and multiple T/R points in heterogeneous networks. This intermediary parameter allows the UE to transmit cell-specific uplink reference signals to different T/R points by mapping each T/R point to a specific uplink reference signal ID, resolving the contradiction between heterogeneous network adaptability and transmission reliability.
Data Source
AI summary
The present disclosure relates to a method for transmitting and receiving an uplink sounding reference signal, and a terminal for same.