MIMO Control Channel Power Boosting Based on Transmission Rank
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Solution Overview
Problem
In MIMO wireless communication systems, optimizing power usage across multiple and dynamically changing channels is challenging, particularly in efficiently boosting control channels to enhance data transmission reliability and spectral efficiency.
Innovation Solution
A method and system for determining boosting parameters for Enhanced Dedicated Physical Control Channels (E-DPCCH) and Secondary Dedicated Physical Control Channels (S-DPCCH) based on the transmission rank, allowing for tailored power allocation and flexible boosting schemes, where the boosting parameter is adjusted according to the rank, with specific values or default settings used when higher-layer signaling is absent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power boosting is applied to control channels in MIMO transmissions, then data transmission reliability is improved, but power usage efficiency deteriorates due to difficulty in optimizing power across multiple dynamically changing ranks
Solution Approach 1:
The patent applies dynamics by making the boosting parameter configurable and adaptable to different transmission ranks. The system transitions from static power allocation to dynamic power allocation where the boosting parameter can be adjusted based on the current transmission rank, allowing optimal power distribution across control channels while maintaining reliability.
Solution Approach 2:
The patent changes the parameter of power boosting by introducing a configurable boosting parameter that modifies the power allocation for control channels based on transmission rank. This parameter can be set to different values (e.g., 0, 1, 2) to control the degree of boosting applied to E-DPCCH and S-DPCCH, enabling efficient power usage while maintaining transmission reliability.
2Productivity
If boosting parameters are determined based on transmission rank, then power allocation efficiency is improved, but device complexity increases due to additional determination logic
Solution Approach 1:
The patent applies local quality by implementing different boosting strategies for different transmission ranks. Instead of a uniform approach, the system applies localized power allocation optimizations specific to each rank scenario (rank 1, rank 2, etc.), improving overall power allocation efficiency while keeping each individual case relatively simple.
Solution Approach 2:
The patent uses parameter changes to manage complexity by introducing a single configurable boosting parameter that encapsulates the power allocation strategy. This parameter can be set based on transmission rank without requiring complex algorithms, simplifying the determination logic while improving power allocation efficiency.
3Measurement precision
If both primary and secondary streams are boosted for rank 2 transmissions, then channel estimate quality is improved, but transmission power consumption increases
Solution Approach 1:
The patent applies dynamics by enabling selective boosting of primary and secondary streams based on transmission rank. For rank 2 transmissions, the system dynamically activates boosting for both streams to improve channel estimate quality, while for other ranks, it adjusts the boosting strategy accordingly, optimizing power consumption based on actual transmission needs.
Solution Approach 2:
The patent uses parameter changes to control the boosting level for primary and secondary streams. By adjusting the boosting parameter based on transmission rank, the system can allocate additional power to both streams when needed for rank 2 transmissions, improving measurement precision while managing overall power consumption through parameter-based control.
Data Source
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AI summary
It is presented a method for controlling multiple input multiple output, MIMO, pilot channel boosting. The method is performed in a user equipment, UE, capable of MIMO transmissions using a primary and a secondary stream. The method comprising the steps of: determining a rank used for uplink transmissions from the UE; and determining a boosting parameter affecting power boosting of an Enhanced Dedicated Physical Control Channel,E-DPCCH, and a Secondary Dedicated Physical Control Channel, S-DPCCH, based on the rank. A corresponding UE, base station and associated method are also presented.