Node B Uplink Scheduling Using Maximum UE Transmitter Power
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Solution Overview
Problem
Current mobile communication systems face inefficiencies in uplink packet transmission scheduling due to the lack of accurate information about UE transmit power margins, leading to suboptimal resource allocation and decreased channel capacity.
Innovation Solution
A method and apparatus that enable a Node B to receive and utilize the maximum UE transmitter power, calculated as the sum of the UE's transmit power and power margin, to efficiently schedule uplink packet transmissions, ensuring optimal resource allocation based on accurate channel status information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the Node B schedules uplink packet transmission based on only Tx power or Tx power margin information, then the scheduling process is simple, but the channel status estimation accuracy is insufficient leading to suboptimal resource allocation
Solution Approach 1:
The patent combines Tx power information and Tx power margin information into a unified maximum UE transmitter power parameter for scheduling decisions. This merging allows the Node B to accurately estimate channel status while maintaining manageable processing complexity through a single integrated parameter rather than handling multiple separate parameters independently.
Solution Approach 2:
The patent introduces maximum UE transmitter power as an intermediary parameter that mediates between the UE's actual transmit power and its power margin capabilities. This intermediary enables accurate channel status estimation without requiring the Node B to process multiple complex parameters simultaneously, resolving the contradiction between measurement precision and device complexity.
2Productivity
If the Node B allocates resources without accurate maximum UE transmitter power information, then the scheduling decision is fast, but the resource allocation optimality deteriorates leading to decreased channel capacity
Solution Approach 1:
The patent applies preliminary action by having the UE signal its maximum transmitter power capability in advance before actual scheduling decisions are made. This allows the Node B to pre-determine optimal resource allocation parameters based on accurate channel status information, achieving both high channel capacity and fast scheduling decisions without requiring complex real-time calculations.
3Productivity
If the UE signals detailed channel status information including both Tx power and power margin, then the Node B can make optimal scheduling decisions, but the signaling overhead increases
Solution Approach 1:
The patent extracts the essential scheduling information from the full set of possible UE signaling parameters. By taking out only the maximum UE transmitter power parameter (which combines Tx power and power margin information), the system achieves optimal scheduling decisions while minimizing signaling overhead, avoiding the need to transmit all detailed channel status information.
Data Source
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AI summary
A method and apparatus are provided for signaling a maximum UE transmitter power to a Node B for use in scheduling of uplink packet transmission in a mobile communication system. The Node B receives uplink channel status information from a UE and a maximum UE transmitter power from an RNC. The maximum UE transmitter power is the lower of the maximum allowed UL Tx power and the maximum Tx power of the UE. The Node B then schedules uplink packet transmission from the UE based on the uplink channel status information and the maximum UE transmitter power.