Base Station Control Channel Segmentation for MIMO Resource Efficiency
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Solution Overview
Problem
In radio communication systems using MIMO schemes like multi-user MIMO or CoMP, the increased transmission capacity leads to insufficient resources for notifying terminals of control information, hindering efficient data allocation and transmission efficiency.
Innovation Solution
A base station and terminal system that dynamically switches between a first control channel and a second control channel, with the second channel being specific to the terminal and only detectable in the connected state, allowing for efficient allocation and transmission of control information through RRC signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MIMO schemes like multi-user MIMO or CoMP are used to increase transmission capacity, then the transmission capacity is improved, but the resources for notifying terminals of control information become insufficient
Solution Approach 1:
The control channel resources are segmented into two types: a first control channel detectable by terminals in both connected and idle states, and a second control channel detectable only by terminals in connected states. This segmentation allows the system to efficiently allocate control information resources by directing different types of control information to appropriate channels, thereby resolving the resource insufficiency problem while maintaining high transmission capacity through MIMO schemes.
Solution Approach 2:
The invention introduces a new dimension for control channel allocation by creating a state-dependent detection mechanism. Terminals in connected states can detect both first and second control channels, while terminals in idle states can only detect the first control channel. This dimensional differentiation in channel detectability based on terminal state enables more efficient resource utilization without compromising transmission capacity.
2Ease of operation
If control information is transmitted using conventional resources, then the implementation is simple, but the resource allocation efficiency deteriorates
Solution Approach 1:
The control channel allocation is made dynamic by introducing state-dependent detectability. The system adapts the control channel usage based on terminal states (connected or idle), allowing terminals in connected states to access both first and second control channels for more efficient resource allocation, while maintaining simplicity for idle terminals that only need to monitor the first control channel.
Solution Approach 2:
Different quality levels of control channel access are provided based on terminal state. Terminals in connected states receive enhanced access to both first and second control channels for efficient resource allocation, while terminals in idle states receive basic access to only the first control channel. This local differentiation optimizes resource allocation efficiency without unnecessarily complicating the system for all terminals.
Data Source
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AI summary
In a radio communications system in which a base station and a terminal communicate with each other, the base station is capable of efficiently notifying the terminal of control information. The base station forms a cell, and communicates with the terminal. The base station sets monitoring of a second control channel in the terminal through RRC signaling that is higher-layer control information, the second control channel being a control channel different from a first control channel detectable by the terminal regardless of whether the terminal is in connected state or idle state and being detectable by the terminal only in a case where the terminal is in the connected state. The base station transmits control information for the terminal by mapping the control information to the second control channel. The connected state is a state where the terminal holds information concerning a network, and the idle state is a state where the terminal does not hold information concerning a network.