Mobile Station Transmission Power Control via Reference Gain Factor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional mobile communication systems face challenges in rapidly changing transmission rates due to processing load and delay, leading to inefficient data transmission and resource wastage, especially during burst data transmissions, which increases operational costs and complexity.
Innovation Solution
A transmission power control method that allows a mobile station to store a reference transmission format with a larger data block size and calculate a gain factor for normal transmission formats, enabling efficient control of enhanced dedicated physical data channel power based on the reference format, reducing the need for multiple reference formats and associated complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the radio network controller RNC integrally controls a plurality of radio base stations Node B to determine transmission rates, then centralized control and resource allocation are achieved, but processing load and delay increase, preventing fast transmission rate changes
Solution Approach 1:
The patent segments the transmission rate control function from the radio network controller RNC and relocates it to the radio base station Node B. Specifically, the MAC-layer function in the Node B independently controls the transmission rate of uplink user data, while the RNC retains control over radio resources. This segmentation enables fast transmission rate changes at the Node B without being constrained by the processing load and delay of centralized RNC control, thereby resolving the contradiction between transmission rate adaptability and control system complexity.
2Adaptability or versatility
If multiple reference transmission formats are stored to cover all transmission data block sizes, then all transmission scenarios are covered, but hardware complexity and control signal volume increase
Solution Approach 1:
The patent extracts the gain factor calculation function from the set of stored reference transmission formats. Instead of storing multiple reference transmission formats to cover all transmission data block sizes, the system stores only a subset of reference transmission formats and calculates the gain factors for other transmission formats using a predetermined calculation formula. This extraction approach reduces hardware complexity and control signal volume while maintaining comprehensive transmission format coverage through mathematical calculation.
Solution Approach 2:
The patent uses a predetermined calculation formula to generate gain factors for non-reference transmission formats based on the reference transmission formats. This is essentially a copying approach where the gain factor patterns from reference formats are replicated and adapted to other formats through calculation, rather than storing unique gain factors for every possible transmission format. This reduces the amount of data that needs to be stored and transmitted while maintaining the necessary control precision.
3Reliability
If transmission rate control is performed slowly on the order of hundreds of ms to seconds, then system stability is maintained, but transmission efficiency decreases during burst data transmissions
Solution Approach 1:
The patent implements dynamic transmission rate control by enabling the MAC-layer function in the radio base station Node B to rapidly adjust transmission rates in response to real-time traffic conditions. This dynamic control allows the system to quickly respond to burst data transmissions, increasing transmission efficiency during such periods. Meanwhile, the overall system stability is maintained through the hierarchical control structure where the RNC provides macro-level resource allocation and the Node B provides micro-level rate adjustment.
Data Source
AI summary
A transmission power control method for controlling transmission power of an enhanced dedicated physical data channel for transmitting uplink user data, includes: storing, at a mobile station, a reference transmission format including a transmission data block size which is used in the enhanced dedicated physical data channel, and a gain factor which is a transmission power ratio between the enhanced dedicated physical data channel and a dedicated physical control channel or which is a transmission wave amplitude ratio between the enhanced dedicated physical data channel and the dedicated physical control channel, calculating, at the mobile station, a gain factor of a normal transmission format based on the transmission data block size and the gain factor of the reference transmission format and the transmission data block size of the normal transmission format, and controlling, at the mobile station, a transmission power of enhanced dedicated physical data channel based on the gain factor of the reference transmission format or the normal transmission format. Here, a transmission data block size of the reference transmission format is larger than the smallest transmission data block size.