E-PDCCH Resource Candidate Configuration for Stable Control Reception
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Solution Overview
Problem
The challenge in LTE-A systems is the fluctuation in the number of resource elements available for E-PDCCH due to variations in OFDM symbols, reference signals, and other factors, leading to degraded receiving quality of control signals.
Innovation Solution
A method to calculate a division number for physical channel resource blocks based on available and occupied resource elements, setting resource region candidates, and determining search spaces to improve receiving quality by optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of resource elements per CCE is increased to improve receiving quality, then receiving quality improves, but the flexibility in resource allocation and adaptability to varying conditions deteriorates
Solution Approach 1:
The patent applies dynamics by making the number of resource elements per CCE variable rather than fixed. The system dynamically adjusts this parameter based on actual channel conditions and resource availability, allowing optimization of receiving quality while maintaining adaptability to varying network conditions.
Solution Approach 2:
The patent changes the parameter of resource elements per CCE from a fixed value to a variable value that can be adjusted according to system conditions. This parameter change enables the system to adapt to different resource availability scenarios while maintaining reliable control signal reception.
2Adaptability or versatility
If the number of resource elements per CCE is decreased to improve flexibility and adaptability, then adaptability improves, but receiving quality deteriorates
Solution Approach 1:
The system dynamically adjusts the number of resource elements per CCE based on actual channel conditions, allowing it to decrease when flexibility is needed and increase when receiving quality is prioritized, thus resolving the contradiction between these two requirements.
Solution Approach 2:
By making the resource elements per CCE a variable parameter rather than a fixed value, the system can optimize this parameter according to actual network conditions, achieving both flexibility and reliable reception when needed.
3Device complexity
If fixed number of resource elements per CCE is used to simplify system design, then device complexity is reduced, but ability to handle varying resource availability deteriorates
Solution Approach 1:
The patent introduces dynamic adjustment capability to handle varying resource availability scenarios. While this increases some complexity, it enables the system to adapt to different conditions that a fixed design cannot handle, achieving better overall system versatility.
Solution Approach 2:
The system implements parameter changes to adapt to varying resource availability conditions. This allows the system to handle diverse scenarios effectively, justifying the additional complexity through significantly improved adaptability and versatility.
Data Source
AI summary
Disclosed is an integrated circuit for controlling a mobile station. The integrated circuit includes: transmission circuitry, which, in operation, transmits uplink channels of a first cell group and a second cell group, wherein a cell group includes one or more cells; and power control circuitry, which is coupled to the transmission circuitry and which, in operation, controls a transmission power of the uplink channels of the second cell group, wherein, in response to simultaneous transmission of: the uplink channel(s) of the first cell group on which uplink control information is multiplexed; and a plurality of reference signals on the uplink channels of the second cell group. The power control circuitry uniformly reduces the transmission power of the uplink channels of the second cell group based on a transmission power of the uplink channel(s) of the first cell group.