Dynamic Spectrum Sharing Across Networks for Interference Avoidance
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Solution Overview
Problem
Wireless communications systems face challenges in complex and dynamic environments that attenuate or block signals, necessitating improvements in speed, data capacity, efficiency, power usage, reliability, coverage, and device intercommunication, particularly in shared frequency spectrum scenarios.
Innovation Solution
Terrestrial and non-terrestrial networks operate in the same frequency spectrum range, with complementary frequency spectrum sharing techniques allowing devices to communicate without interference by allocating different frequency channel bands to avoid overlap, using methods such as beam-specific frequency channel band allocation and user equipment indications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple networks operate in the same geographic area using the same frequency spectrum range, then spectrum utilization efficiency is improved, but interference between networks occurs
Solution Approach 1:
The frequency spectrum range is segmented into multiple frequency channel bands (e.g., first frequency channel band, second frequency channel band). Different networks are assigned different segments of the spectrum to operate simultaneously in the same geographic area without interfering with each other. This segmentation allows multiple networks to share the spectrum resource efficiently while avoiding harmful interference.
Solution Approach 2:
Different geographic areas or cells are assigned different frequency channel bands based on local conditions. For example, a first cell may use the first frequency channel band while a second cell uses the second frequency channel band. This local differentiation allows networks to adapt frequency allocation to specific geographic contexts, improving overall spectrum utilization while preventing interference in each local area.
2Object-affected harmful factors
If different frequency bands are allocated to different networks in the same geographic area, then interference is avoided, but spectrum utilization efficiency deteriorates
Solution Approach 1:
The frequency channel band allocation is made dynamic rather than static. Network entities can indicate to user equipment which frequency channel band to use based on current network conditions, geographic location, and interference scenarios. This dynamic allocation allows the system to adapt to changing conditions and maximize spectrum utilization efficiency while maintaining interference avoidance where necessary.
Solution Approach 2:
The same frequency spectrum range serves multiple networks simultaneously through complementary frequency sharing. The frequency band allocation mechanism is designed to be universal, supporting multiple networks (e.g., terrestrial networks and non-terrestrial networks) to operate in the same geographic area by appropriately assigning different frequency channel bands to different networks based on their specific requirements and conditions.
3Productivity
If frequency allocation information is exchanged between network entities, then complementary frequency spectrum sharing is enabled, but signaling overhead increases
Solution Approach 1:
The essential frequency allocation information is extracted and exchanged between network entities in a streamlined manner. Instead of exchanging complete and redundant information sets, the system identifies and exchanges only the critical parameters needed for complementary frequency spectrum sharing (e.g., frequency channel band assignments, cell identifiers). This extraction of essential information enables spectrum sharing while minimizing signaling overhead.
Solution Approach 2:
A standardized interface or intermediary mechanism is introduced between different network entities to facilitate frequency allocation information exchange. This intermediary layer manages the information exchange process, ensuring that only necessary information is transmitted and that the signaling protocol is optimized to reduce overhead while still enabling complementary frequency spectrum sharing between networks.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for wireless communication by a first network entity of a first network of a first network operator. A method includes receiving, from a second network entity of a second network of a second network operator, frequency allocation information indicating a first allocation pattern identifying, for each of at least one cell, a corresponding frequency channel band of a frequency band spanning a plurality of frequency channel bands, wherein the first allocation pattern identifies a first frequency channel band of the plurality of frequency channel bands for a first cell of the at least one cell; and sending an indication to at least a first user equipment (UE) indicating to communicate in the first cell using a second frequency channel band of the plurality of frequency channel bands that is different than the first frequency channel band.