Relay Node Dynamic Resource Block Allocation
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Solution Overview
Problem
Relay nodes in wireless communication systems face challenges with self-interference and resource management, leading to inefficiencies in spectrum usage and potential data loss due to temporal changes in traffic load, which can result in discarded traffic and revenue loss for operators.
Innovation Solution
A method and system where a relay node associated with a base station dynamically allocates resource blocks by identifying unused blocks in a subframe reserved for the base station and schedules transmissions on those blocks to user equipment, allowing for flexible resource distribution based on load conditions and minimizing self-interference through strategic subframe configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resource blocks are statically reserved for base station transmissions to relay nodes, then control information can be reliably transmitted, but spectrum efficiency deteriorates when traffic load varies
Solution Approach 1:
The patent implements dynamic resource block allocation where the relay node determines whether to transmit control information to user equipment based on actual traffic conditions. Instead of static reservation, the system adapts resource allocation in real-time by monitoring data arrivals from the base station and adjusting transmissions accordingly, thereby improving spectrum efficiency while maintaining reliable control information transmission when needed.
Solution Approach 2:
The system changes the operational parameters of resource blocks dynamically. Resource blocks that are statically reserved can be repurposed or released based on traffic demand. The relay node monitors the presence of control information from the base station and adjusts its transmission behavior accordingly, changing the state of resource block utilization from fixed to variable based on actual communication needs.
2Productivity
If the relay node transmits data to user equipment on resource blocks reserved for control information, then spectrum efficiency improves, but self-interference increases causing data loss
Solution Approach 1:
The relay node implements a feedback mechanism by monitoring whether control information is actually present on resource blocks before deciding to transmit data to user equipment. This feedback loop allows the system to detect the presence of base station transmissions and adjust relay transmissions accordingly, preventing self-interference while still enabling dynamic resource utilization for improved spectrum efficiency.
Solution Approach 2:
The transmission behavior of the relay node is made dynamic rather than static. The relay node continuously assesses the channel conditions and control information presence, adjusting its transmission decisions in real-time. This dynamic adaptation allows the system to exploit available spectrum resources while avoiding periods when self-interference would occur, thereby resolving the contradiction between spectrum efficiency and interference avoidance.
3Reliability
If time multiplexing is used to avoid self-interference, then data loss is prevented, but resource utilization deteriorates due to discarded traffic
Solution Approach 1:
The patent replaces rigid time multiplexing with dynamic resource allocation. Instead of pre-assigning specific time slots for control and data transmissions, the relay node dynamically determines resource block usage based on actual traffic conditions and control information presence. This flexibility allows the system to maintain data transmission reliability while maximizing resource utilization by avoiding unnecessary discarding of traffic during multiplexing transitions.
Solution Approach 2:
The system changes the temporal parameters of transmission dynamically rather than following fixed time multiplexing schedules. Resource block allocation and transmission timing are adjusted based on real-time traffic demand and control information arrivals, allowing the system to maintain reliability while improving overall resource utilization by eliminating the waste inherent in static time division approaches.
Data Source
AI summary
Exemplifying embodiments herein relate to a relay node and a method therein for communicating data to a user equipment, the relay node being associated with a base station, is provided. The method comprises receiving information from the base station indicating a first set of resource blocks of a subframe comprising control information. The method further comprises identifying, based on the received information, at least one resource block outside the first set of resource blocks, and scheduling, to the user equipment, transmissions on the at least one identified resource block.