CoMP Base Station Signal Timing for RSRP Differentiation
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Solution Overview
Problem
In heterogeneous 4G communication environments, determining the optimal combination of base stations for CoMP (Coordinated Multiple Point) communication is challenging due to identical cell IDs among RRHs, leading to interference and reduced throughput.
Innovation Solution
A communication device and method that allows base stations with the same cell ID to transmit specific signals at distinct timings, enabling user equipment to differentiate and measure RSRP (Reference Signal Received Power) from individual RRHs, thereby determining the best CoMP set for communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple base stations use the same cell ID in heterogeneous networks, then network compatibility and ease of operation are improved, but signal differentiation and measurement precision deteriorate
Solution Approach 1:
The patent segments the transmission timing of reference signals across multiple base stations. Each base station transmits its reference signal at a distinct time slot, allowing the terminal to differentiate between base stations with identical cell IDs through timing observation. This segmentation in the time domain resolves the measurement precision issue while maintaining the ease of operation benefit from unified cell ID usage.
Solution Approach 2:
The patent implements periodic transmission of reference signals with different timing offsets for each base station. The reference signals are transmitted in a periodic manner where each base station has a unique timing pattern, enabling the terminal to identify and measure signals from individual base stations despite sharing the same cell ID. This periodic action with differentiated timing solves the signal differentiation problem.
2Area of stationary object
If all base stations transmit reference signals simultaneously, then communication coverage is expanded, but interference increases and reduces system throughput
Solution Approach 1:
The patent segments the reference signal transmission in the time domain by assigning different time slots to different base stations. This segmentation reduces simultaneous transmissions and associated interference, thereby improving system throughput while maintaining comprehensive coverage through coordinated multi-base station transmission. The time-division approach allows coverage expansion without the penalty of simultaneous signal interference.
Solution Approach 2:
The patent employs periodic reference signal transmission with staggered timing across base stations. By using periodic action with different timing offsets, the system achieves broad coverage through coordinated transmission while minimizing interference through temporal separation. This periodic staggered transmission improves productivity by reducing collision and interference effects.
3Device complexity
If base stations transmit reference signals at the same timing, then device complexity is reduced, but the ability to determine individual base station signals deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-configuring different timing offsets for reference signal transmission at each base station. This preliminary timing arrangement is established before transmission begins, allowing terminals to easily identify and measure individual base station signals through simple timing observation. The preliminary timing configuration reduces the complexity of real-time signal differentiation while improving base station identification capability.
Data Source
AI summary
An electronic device that communicates with a plurality of base stations by Coordinated Multiple Point transmission and reception (CoMP), the base stations including at least a first base station and a second base station. The electronic device receives configuration information from the first base station, the configuration information indicating a first period of a first reference resource; and receives a second reference resource from the second base station during the first period. The first reference resource corresponds to a muted power Channel State Information-Reference Signal (CSI-RS) and the second reference resource corresponds to a non-muted power CSI-RS.