Active DAS Relay Unit Gain Control via Adjustable Attenuator
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Solution Overview
Problem
Active Distributed Antenna Systems (DAS) face complexity and high construction costs due to the inability to accommodate remote units with different power levels, as existing designs require a single power level for compatibility, complicating coverage schemes and limiting network flexibility.
Innovation Solution
A method and device for gain control in an active DAS relay unit that acquires downlink output power values and uplink maximum gain values, calculates attenuation adjustment values, and sets adjustable attenuators to accommodate remote units with varying power levels, ensuring compatibility and simplifying network design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a relay unit is designed for a specific power level, then it can maintain proper gain balance and receiving sensitivity, but it cannot accommodate remote units with different power levels
Solution Approach 1:
The patent applies dynamics by making the attenuator adjustable rather than fixed. The attenuator can dynamically change its attenuation value based on the power level of the connected remote unit, allowing the relay unit to adapt to different power levels while maintaining proper gain balance and receiving sensitivity for each scenario.
Solution Approach 2:
The patent changes the parameter of the attenuator from a fixed value to an adjustable value. By modifying the attenuation parameter based on the remote unit's power level, the system achieves compatibility across different power levels while maintaining optimal receiving sensitivity through proper gain balance.
2Adaptability or versatility
If different types of relay units are designed for different power levels, then compatibility is achieved, but the design complexity and construction cost increase
Solution Approach 1:
The patent applies universality by designing a single relay unit type that can serve multiple power levels. The adjustable attenuator enables one relay unit design to accommodate various remote unit power levels, eliminating the need for multiple specialized relay unit types and thereby reducing design complexity while maintaining compatibility.
Solution Approach 2:
The dynamic attenuator allows a single relay unit design to adapt to different power level requirements, making the design universal rather than requiring separate static designs for each power level. This reduces overall system design complexity.
3Adaptability or versatility
If different types of relay units are designed for different power levels, then compatibility is achieved, but the construction cost increases
Solution Approach 1:
The patent reduces construction cost by using a universal relay unit design with an adjustable attenuator that can handle multiple power levels. This eliminates the need to purchase and deploy multiple types of relay units for different power levels, reducing overall construction expenditure.
4Device complexity
If the uplink gain is fixed, then the system is simple to design, but it cannot accommodate remote units with different downlink output power values
Solution Approach 1:
The patent transitions from a fixed uplink gain design to a dynamic adjustable attenuator design. This allows the system to adapt to different remote unit power levels while maintaining relatively simple overall design through automated adjustment mechanisms.
Solution Approach 2:
The uplink gain parameter is changed from fixed to adjustable, enabling the system to accommodate different power levels. The attenuator's adjustment capability allows the same hardware design to work across multiple power scenarios without increasing fundamental design complexity.
Data Source
AI summary
A method for gain control of an active DAS relay unit is disclosed, including: acquiring a downlink output power value of a remote unit accessing the active DAS, and acquiring an uplink maximum gain value of a relay unit of the active DAS; obtaining an attenuation adjustment value required to be set for an uplink where the remote unit is, based on a combination of the downlink output power value and the uplink maximum gain value; and setting an adjustable attenuator arranged in the uplink based on the attenuation adjustment value. A device for gain control of an active DAS relay unit and a relay unit are also disclosed. The present disclosure may be compatible with remote units with different power levels, simplify the complexity of the design of the coverage scheme, increase the flexibility of the network construction, and reduce the cost of the network construction.