Joint Transmission Area Adjustment in Mobile Communication Systems
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Solution Overview
Problem
Current mobile communication systems face limitations in maximizing system capacity due to the difficulty in optimizing cell design and resource allocation, especially when the number of users varies, leading to degraded performance during peak usage.
Innovation Solution
A mobile communication system with a digital unit and multiple radio units that dynamically adjust the joint transmission area based on network load, allowing for wider transmission areas during low load periods and narrower areas during high load periods, by determining the terminal's location using signal strength and transmission power equations and adjusting parameters accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If joint transmission is performed by multiple base stations to improve signal quality, then terminal quality is improved, but radio resources are consumed excessively
Solution Approach 1:
The patent applies local quality by defining a specific joint transmission area where joint transmission is performed only for terminals located within that area. The digital unit determines the terminal's location by comparing signal strength values from different radio units and establishes whether the terminal falls within the joint transmission area based on this location information. This ensures that joint transmission resources are allocated locally and selectively rather than universally.
Solution Approach 2:
The patent implements dynamics by making the joint transmission area variable rather than fixed. The digital unit adjusts the joint transmission area dynamically based on network load conditions - expanding the area when load is low to allow more terminals to benefit from joint transmission, and contracting the area when load is high to conserve radio resources. This dynamic adjustment resolves the contradiction between improving signal quality and managing radio resource consumption.
2Productivity
If the joint transmission area is expanded to serve more terminals, then system capacity is improved, but radio resources are depleted faster
Solution Approach 1:
The patent applies dynamics by making the joint transmission area variable rather than fixed. The digital unit adjusts the joint transmission area dynamically based on network load conditions - expanding the area when load is low to allow more terminals to benefit from joint transmission, and contracting the area when load is high to conserve radio resources. This dynamic adjustment resolves the contradiction between improving signal quality and managing radio resource consumption.
Solution Approach 2:
The patent implements feedback by continuously monitoring network load conditions and using this information to adjust the joint transmission area. The digital unit receives load information from base stations, determines the current network state, and accordingly modifies the joint transmission area parameters. This feedback mechanism ensures that system capacity is maximized when resources are abundant while preventing resource depletion when the system is under stress.
3Ease of manufacture
If a fixed base station structure is used with all processing units in each cell, then cell design is simplified, but system optimization is limited
Solution Approach 1:
The patent applies segmentation by dividing the base station functionality into separate digital units and radio units. The digital unit handles processing functions including joint transmission area determination and location calculation, while radio units handle radio frequency operations. This segmentation allows flexible deployment where multiple radio units can be coordinated by a single digital unit, enabling optimized cell designs that adapt to various deployment scenarios while maintaining manageable complexity.
Data Source
AI summary
Provided are a mobile communication system, a digital unit, and a method of establishing a joint transmission area in the system. When the digital unit determines that a terminal is located in a joint transmission area based on signal strength values received from two of radio units and transmission powers of the two radio units, the digital unit adjusts the joint transmission area depending on the load on the network including the two radio units belong in order to allow the two radio units to perform a joint transmission function to send at least one of the same signal and a spatiotemporally coded signal of the same data to the terminal.