Uplink FSTD Across Independent Tx Chains Without Common Power Back-Off
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Solution Overview
Problem
In frequency domain resource allocation, the existing technologies fail to efficiently address the issue of power reduction in frequency switched transmit diversity (FSTD) when the output of back-offs (frequency switched transmit diversity, FSTD) are different, causing a decrease in the power of transmit chain (Tx) are not related to each other, leading to reduced power in each Tx.
Innovation Solution
The proposed solution involves a communication method and apparatus that supports frequency switched transmit diversity (FSTD) by allowing multiple independent transmit chains (Txs) to have independent output back-offs (OBOs), enabling separate power back-off on each Tx based on its own OBO, and allocating resource sets to each Tx to optimize the FSTD, thereby avoiding power reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a same back-off power is applied to all Txs in FSTD technology, then the implementation is simple, but the power of Txs is reduced when their OBOs are different
Solution Approach 1:
The patent segments the unified power management into independent per-Tx power management. Each Tx chain is allowed to apply its own back-off power based on its individual OBO, rather than forcing a unified back-off across all Txs. This segmentation enables each Tx to operate at its optimal power level, resolving the contradiction between operational simplicity and power efficiency.
2Power
If independent power management is implemented for each Tx with different OBOs, then the Tx power is optimized, but the system complexity increases
Solution Approach 1:
Each Tx chain autonomously determines and applies its own back-off power based on its individual OBO characteristics. The system enables self-service power management where each Tx independently optimizes its power without requiring complex centralized coordination, thus reducing overall system complexity while maintaining power optimization benefits.
Data Source
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AI summary
This application provides a communication method and apparatus, and relates to the communication field. A terminal device can send uplink information on a plurality of mutually independent transmit chains Txs. Because the plurality of Txs are independent of each other, output back-off OBOs of the plurality of Txs are not related to each other. Therefore, the terminal device may separately perform power back-off on each Tx based on an OBO of each Tx, and does not need to consider an OBO of another Tx. This can avoid a case in which powers of the Txs are reduced when the OBOs of the plurality of Txs are different. The method includes: The terminal device sends capability information, where the capability information indicates that the terminal device supports FSTD of the plurality of mutually independent Txs; receives first information, where the first information indicates an uplink resource, the uplink resource includes a plurality of resource sets, and the plurality of resource sets respectively correspond to the plurality of Txs; and sends uplink information on the plurality of resource sets.