Enhanced Physical Control Channel Mapping in Heterogeneous Networks
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Solution Overview
Problem
In heterogeneous network deployments, existing methods for transmitting control information from a base station to a terminal face challenges in efficiently improving transmission efficiency due to capacity issues in the transmission region, particularly in CoMP transmission schemes.
Innovation Solution
A communication system that utilizes enhanced physical control channels, constituted by enhanced control channel elements mapped across resource block pairs using distributed or localized mapping, with specific resource element grouping and numbering schemes to efficiently transmit control information, independent of mapping type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing methods for transmitting control information are used in heterogeneous network deployments, then the transmission region capacity is limited, but the transmission efficiency cannot be improved
Solution Approach 1:
The patent introduces a new dimension for control information transmission by defining enhanced physical control channels that operate independently from traditional physical downlink control channels. This creates an additional transmission dimension in the resource space, allowing control information to be conveyed through enhanced resource element groups with distributed or localized mapping across resource blocks, thereby improving transmission efficiency without being constrained by the capacity of existing control channels.
2Adaptability or versatility
If distributed mapping is used for enhanced control channel elements, then resource allocation flexibility is improved, but mapping complexity increases
Solution Approach 1:
The patent employs parameter changes by introducing configurable mapping types (distributed and localized) that can be selected based on channel conditions and resource availability. The system dynamically adjusts mapping parameters such as resource block selection, enhanced resource element group distribution patterns, and mapping density to optimize performance. This allows the system to adapt to different scenarios while managing complexity through standardized mapping procedures for each type.
3Productivity
If localized mapping is used for enhanced control channel elements, then resource allocation efficiency is improved, but adaptability to different channel conditions decreases
Solution Approach 1:
The patent implements dynamics by enabling the system to switch between distributed mapping and localized mapping modes based on real-time channel conditions, traffic patterns, and resource availability. The base station can dynamically select the appropriate mapping type for each enhanced physical control channel transmission, allowing the system to exploit the resource allocation efficiency of localized mapping when conditions permit while maintaining the adaptability benefits of distributed mapping when channel conditions vary significantly across the bandwidth.
Data Source
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AI summary
In a radio communication system in which a base station and a terminal communicate with each other, the base station efficiently transmits control information to the terminal. The base station that communicates with the terminal using resource blocks, each of which is constituted by a prescribed time region and a prescribed frequency region, includes a terminal-specific control channel generation unit that generates terminal-specific control channels mapped in a terminal-specific control channel region constituted by a prescribed number of resource blocks and transmitted using the same antenna port as for terminal-specific reference signals, which are reference signals specific to the terminal. The resource blocks in the terminal-specific control channel region are divided into a plurality of resource element groups, and the terminal-specific control channels are mapped in the resource element groups using a distributed mapping rule, in which the terminal-specific control channels are mapped in such a way as to be distributed among a plurality of resource blocks, or a localized mapping rule, in which the terminal-specific control channels are mapped in one of the resource blocks in a localized manner.