eNodeB Frequency Resource Configuration for Spectrum Utilization
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Solution Overview
Problem
Current cellular mobile communications networks face low spectrum resource utilization due to limitations in using high-band radio spectrum resources, particularly with existing FDD and TDD modes, which result in inefficient use of frequency bands and increased interference.
Innovation Solution
An eNodeB configures uplink and downlink frequency resources separately in different time units on a specific frequency band using various duplex modes (TDD, FDD, and full-duplex modes) to dynamically adjust frequency allocation, optimizing resource utilization and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If FDD mode is used with symmetric frequencies for uplink and downlink, then resource allocation is continuous in time, but spectrum resource utilization is reduced due to asymmetric service data
Solution Approach 1:
The patent applies dynamics by enabling flexible switching between FDD and TDD modes based on service requirements. The system dynamically adjusts the duplex mode for different frequency resources, allowing continuous resource allocation in FDD mode while achieving high spectrum utilization in TDD mode for asymmetric services.
2Productivity
If TDD mode is used with same frequency for uplink and downlink in different timeslots, then spectrum resource utilization is improved, but intra-system and inter-system interference is caused requiring large guard bands
Solution Approach 1:
The patent segments the frequency band into multiple frequency resources, where some resources use FDD mode and others use TDD mode. This segmentation allows the system to avoid interference issues in TDD mode by using FDD mode for certain services while maintaining high spectrum utilization through TDD mode for other services.
3Quantity of substance
If high-band radio spectrum resources are used with traditional TDD or FDD modes, then bandwidth is increased, but spectrum resource utilization remains low due to fixed bandwidth granularity
Solution Approach 1:
The patent applies dynamics by allowing flexible configuration of bandwidth granularity for different frequency resources. The system can dynamically adjust the bandwidth allocation and switch between duplex modes to match the actual service requirements, thereby achieving high spectrum resource utilization with high-band resources.
4Object-affected harmful factors
If large guard bands are reserved to avoid inter-system interference in TDD mode, then interference is reduced, but spectrum resource utilization becomes relatively low
Solution Approach 1:
The patent segments the frequency spectrum into multiple resources with different duplex modes. By using FDD mode for some frequency resources, the system avoids the need for large guard bands while maintaining interference protection through frequency separation, thereby improving overall spectrum resource utilization.
Data Source
AI summary
The embodiments discloses a data transmission method and device. The method includes: separately configuring, by an eNodeB in different time units on a specific frequency band according to a TDD mode or an FDD mode, an uplink frequency resource used for transmitting uplink data and a downlink frequency resource used for transmitting downlink data; and sending, by the eNodeB, downlink data to user equipment UE by using the configured downlink frequency resource, and receiving, by using the configured uplink frequency resource, uplink data sent by the UE, so that an uplink frequency resource and a downlink frequency resource are configured in different time units on a same frequency band according to both a TDD mode and an FDD mode.