Relay Terminal Frequency Resource Allocation for Wireless Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mobile communication systems face challenges in managing explosive data traffic, high data rates, numerous connected devices, low latency, and energy efficiency, particularly in transmitting and receiving signals through relay terminals, where resource limitations and interference issues arise.
Innovation Solution
A method for relay terminals in wireless communication systems that involves allocating different frequency resources for uplink (UL) and downlink (DL) signals, calculating and adjusting transmission powers, and employing frequency hopping to achieve efficient signal transmission and reception, while prioritizing signal transmission and optimizing power usage to prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If different frequency resources are allocated to UL and DL signals in the same carrier, then frequency resource efficiency is improved, but system complexity increases
Solution Approach 1:
The frequency spectrum is segmented into different frequency resources for UL and DL signals within the same carrier. The relay terminal is configured with multiple frequency resources, and the base station allocates specific frequency resources to different links (backhaul and access) to enable simultaneous transmission without interference, thereby improving frequency resource efficiency while managing complexity through structured allocation.
Solution Approach 2:
The patent introduces frequency diversity as an additional dimension for resource allocation. By allocating different frequency resources for UL and DL signals and employing frequency hopping patterns, the system transforms a potentially conflicting two-dimensional resource allocation problem into a multi-dimensional solution that resolves interference issues through frequency domain separation.
2Reliability
If transmission power is adjusted to prevent interference, then signal quality is improved, but available power for other signals decreases
Solution Approach 1:
The relay terminal dynamically adjusts transmission power based on real-time conditions. The base station determines transmission power for backhaul and access links considering signal quality requirements and available power. When power constraints are detected, the system dynamically allocates power resources, adjusts transmission parameters, or modifies frequency resource allocation to maintain signal quality while preserving power for other critical signals.
Solution Approach 2:
The system changes transmission power parameters adaptively. The base station calculates appropriate power levels for different links and signals, and the relay terminal adjusts its transmission power accordingly. This parameter adjustment allows the system to optimize signal quality for critical signals while ensuring sufficient power remains for other transmissions, resolving the power allocation dilemma.
3Reliability
If frequency hopping is employed to achieve frequency diversity, then signal reliability is improved, but transmission complexity increases
Solution Approach 1:
The patent implements frequency hopping as a periodic action pattern. The base station and relay terminal follow predetermined frequency hopping patterns that cycle through different frequency resources. This periodic frequency switching provides frequency diversity, improving signal reliability by exploiting frequency selectivity and avoiding deep fades, while the use of structured patterns keeps the complexity manageable.
4Productivity
If simultaneous transmission and reception is enabled, then throughput is improved, but interference between signals increases
Solution Approach 1:
The system segments frequency resources to enable simultaneous transmission and reception. By allocating different frequency resources for backhaul UL, backhaul DL, access UL, and access DL signals, the relay terminal can transmit and receive simultaneously without mutual interference. This frequency domain segmentation allows parallel operations, improving throughput while preventing the harmful interference that would occur in a single-frequency simultaneous transmission-reception system.
Solution Approach 2:
Frequency resource allocation acts as an intermediary mechanism that resolves the interference problem. The base station serves as the intermediary that coordinates and allocates frequency resources to different links, enabling the relay terminal to simultaneously transmit and receive without direct signal interference. This intermediary allocation system allows simultaneous operations while maintaining signal integrity.
Data Source
AI summary
A method for a relay terminal to transmit and receive signals in a wireless communication system according to an embodiment of the present disclosure comprises: a step for transmitting, in a first time region, a UL signal to an upper node through a backhaul link and a DL signal to at least one lower node through an access link; and a step for receiving, in a second time region, a DL signal from the upper node through the backhaul link and a UL signal from the at least one lower node through the access link, wherein different frequency resources are allocated to the UL signal and the DL signal in the same carrier in each of the first time domain and the second time domain.