Adaptive Frame Structure for Relay Station Resource Allocation
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Solution Overview
Problem
The conventional multi-hop relay communication system inefficiently uses time-frequency resources due to fixed preamble locations and an inability to adaptively change the ratio between backhaul and access link frame sections, leading to reduced resource utilization.
Innovation Solution
A method and system that group relay stations into multiple groups, allowing for the transmission of frames with different structures to each group, enabling efficient use of time-frequency resources by allowing adaptive adjustment of frame sections and synchronization between relay stations and mobile stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional frame structure with fixed preamble locations is used, then synchronization between base station and relay stations is maintained, but time-frequency resource utilization efficiency deteriorates
Solution Approach 1:
The patent applies dynamics by making the frame structure adaptive rather than fixed. The base station dynamically adjusts the frame structure based on channel conditions and traffic requirements, allowing the ratio between backhaul and access link frame sections to change flexibly. This enables efficient time-frequency resource utilization while maintaining synchronization through adaptive preamble placement and frame formatting.
Solution Approach 2:
The patent changes key parameters of the frame structure, including the ratio of backhaul to access link sections, preamble locations, and frame durations. By varying these parameters based on actual network conditions, the system optimizes resource allocation efficiency while ensuring reliable synchronization across multiple hops.
2Device complexity
If the location of preamble for relay station is fixed, then synchronization is simplified, but the ratio between backhaul link and access link frame sections cannot be adaptively changed
Solution Approach 1:
The system transitions from a static, fixed preamble location approach to a dynamic, adaptive frame structure. The base station adjusts preamble locations and frame section ratios in real-time based on channel conditions and traffic patterns, enabling flexible adaptation while managing synchronization complexity through centralized control.
Solution Approach 2:
The patent implements variable parameters for preamble positioning and frame section allocation. Instead of fixed locations, the system changes preamble locations and frame durations based on actual network needs, allowing adaptive adjustment of backhaul and access link ratios to optimize performance.
3Ease of manufacture
If conventional frame structure is used, then system implementation is simple, but time-frequency resources cannot be efficiently used
Solution Approach 1:
The patent optimizes time-frequency resource efficiency by dynamically changing frame parameters such as section ratios and durations. The base station adjusts these parameters to match actual traffic conditions and channel characteristics, maximizing resource utilization while maintaining manageable implementation complexity through standardized protocols.
Data Source
AI summary
Disclosed is a system and method for transmitting/receiving a signal in a communication system. In the system and method, a base station transmits data to a first relay station, which is connected directly thereto from among relay stations belonging to a first relay station group, through a first frame interval, and transmits data to a second relay station, which is connected directly thereto from among relay stations belonging to a second relay station group, through a second frame interval subsequent to the first frame interval. In the first frame interval or the second frame interval where no data is received from the base station, each of the first and second relay stations transmits data to a next relay station connected directly thereto within the same relay station group, and communicates data with a mobile station in direct communication therewith.