Multi-Hop Relay Frame Structure for Control Information Transmission
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Solution Overview
Problem
Conventional multi-hop relay broadband wireless communication systems lack a frame structure that efficiently allocates resources for both BS-MS and BS-RS links, limiting their ability to effectively utilize multi-hop relay technology and provide reliable communication in varying radio environments.
Innovation Solution
The proposed solution involves a frame structure with dedicated relay link transmission and reception intervals within a frame, allowing for the transmission and reception of control information between Relay Stations (RS), enabling efficient resource allocation and communication between BS, RS, and MS, using a Time Division Duplex (TDD) mode with specific zones for transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional frame structure allocating resources only for BS-MS link is used, then the system maintains simple frame structure, but it cannot support multi-hop relay communication between BS-RS and RS-MS links
Solution Approach 1:
The frame structure is segmented into distinct intervals: a first interval for BS-MS direct communication and a second interval for RS relay communication. This segmentation allows the system to support both conventional BS-MS links and new multi-hop relay links without requiring complete frame structure redesign, thus improving adaptability while controlling complexity
Solution Approach 2:
The frame structure is designed to be dynamic, allowing flexible configuration of transmission and reception intervals within each frame. The BS and RS can adaptively adjust their transmission/reception timing based on traffic conditions and channel states, enabling the frame structure to accommodate varying relay communication requirements without becoming overly complex
2Productivity
If control information is transmitted flexibly at various time points, then the system achieves better adaptability to channel conditions, but it increases overhead and reduces resource utilization efficiency
Solution Approach 1:
Control information is transmitted in advance during the first interval before the actual data transmission in the second interval. This preliminary transmission of control information allows receiving nodes to prepare for upcoming data transmission, enabling efficient resource allocation and reducing the need for additional control overhead during data transmission phases
3Ease of operation
If relay link transmission intervals are distributed throughout the frame, then the system achieves better load balancing, but it increases the complexity of resource allocation and control
Solution Approach 1:
The frame is segmented into a first interval for BS-MS communication and a second interval for RS relay communication. This clear segmentation simplifies resource allocation by assigning specific time resources to specific communication types, making it easier to manage and control while still achieving load balancing through the periodic distribution of relay intervals throughout the frame structure
Data Source
AI summary
An apparatus and method for transmitting control information to a Relay Station (RS) in a multi-hop relay broadband wireless communication system is disclosed. The apparatus includes a generator, a controller, and a communication unit. The generator generates control information to be transmitted to a lower RS. The controller controls and transmits the control information during a first relay link transmission interval among at least one relay link transmission interval distributed within a frame. The communication unit transmits the control information to the lower RS.