Base Station Antenna Configuration Asymmetric Frame Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In massive MIMO wireless radio networks, the existing frame structure limits the ability to increase downlink capacity as the uplink time slot is required for calculating antenna configuration, restricting the ratio between uplink and downlink time slots.
Innovation Solution
The method involves using training signals from a prior frame to determine antenna configuration parameters for subsequent frames, allowing for asymmetric allocation of uplink and downlink time slots, enabling up to 100% downlink capacity by reducing the uplink slot duration while maintaining sufficient calculation time for the hermitian transpose of the footprint matrix.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the uplink time slot is extended to allow for calculation of the hermetian transpose of the footprint matrix, then the antenna configuration can be optimized, but the downlink capacity is reduced due to the fixed frame structure
Solution Approach 1:
The patent applies preliminary action by calculating the hermetian transpose of the footprint matrix in advance during the uplink time slot, so that the antenna configuration is already optimized before downlink transmission begins. This allows the downlink capacity to be maximized without compromising the accuracy of antenna configuration, as the calculation is completed beforehand rather than during the downlink slot.
2Productivity
If the downlink time slot is extended to increase downlink capacity, then more data can be transmitted, but the uplink time slot must be reduced which affects the calculation time for antenna configuration
Solution Approach 1:
The patent performs the antenna configuration calculation during the uplink time slot before downlink transmission, allowing the full downlink slot to be used for data transmission without sacrificing calculation time. The hermetian transpose calculation is completed in advance, so the downlink capacity can be maximized while maintaining sufficient time for accurate antenna configuration.
3Ease of operation
If the frame structure is made symmetric with equal uplink and downlink time slots, then the system is simpler to manage, but the downlink capacity cannot be optimized for broadcasting scenarios
Solution Approach 1:
The patent introduces asymmetry in the frame structure by allocating different time slot durations to uplink and downlink transmissions. Specifically, the downlink time slot is extended relative to the uplink time slot to accommodate broadcasting scenarios where higher downlink capacity is required. This asymmetric design optimizes the frame structure for the specific use case while maintaining manageable complexity through systematic resource allocation.
Data Source
AI summary
A base station (11) for a wireless radio network (10) comprises a plurality of antennas (12) for transmitting radio frequency signals between the base station (11) and a user equipment (16). The base station (11) receives at each antenna (12) of a subset of the plurality of antennas (12) a training signal sent by the user equipment (16) in a first frame (20) and determines an antenna configuration parameter for each antenna (12) of the subset of the plurality of antennas (12) based on the training signal received in the first frame (20) for a subsequent transmission of payload information (33, 34) between the base station (11) and the user equipment (16) in a second frame (30) which is different from the first frame (20).