Base Station Relay Scheme Selection for Multihop Throughput
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In multi-hop communication systems, the throughput decreases when multiple mobile stations share a relay station, especially due to increased delay and noise degradation in regenerative relay, and channel quality variations affect overall system performance.
Innovation Solution
A wireless communication system that dynamically switches between non-regenerative and regenerative relay schemes based on channel quality, using a combination of both to maintain optimal modulation schemes and prevent throughput degradation by determining the best relay scheme and modulation scheme for each channel condition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If regenerative relay is used to expand service area, then signal quality is improved through decoding-reencoding, but relay delay increases and system throughput decreases when multiple mobile stations share the relay
Solution Approach 1:
The patent implements dynamic relay scheme selection that adapts between regenerative and non-regenerative relay based on real-time channel conditions and traffic requirements. The system dynamically chooses the optimal relay mode for each transmission, allowing flexibility to balance signal quality improvement against relay delay depending on current system state
Solution Approach 2:
The patent segments the relay function into two distinct modes: regenerative relay for scenarios requiring high signal quality, and non-regenerative relay for scenarios where low delay is critical. This segmentation allows the system to apply the appropriate relay technique to different data streams or time periods based on requirements
2Area of stationary object
If multiple mobile stations use a single relay station, then service area coverage is improved, but user throughput decreases due to relay processing for multiple users
Solution Approach 1:
The system dynamically adjusts relay processing mode based on the number of active mobile stations and channel conditions. When multiple users are present, the system can switch to non-regenerative relay for some users to reduce processing overhead, while maintaining regenerative relay for users requiring higher quality service
Solution Approach 2:
The patent applies different relay processing qualities to different users or data streams based on their specific channel conditions and service requirements. High-priority or poor-channel users receive full regenerative processing, while other users receive simplified non-regenerative processing
3Speed
If non-regenerative relay is used to reduce relay delay, then transmission speed is improved, but noise degradation occurs due to signal amplification
Solution Approach 1:
The system dynamically selects between non-regenerative and regenerative relay based on channel quality measurements. When channel conditions are good, non-regenerative relay is used for speed. When channel conditions deteriorate, the system switches to regenerative relay to maintain signal quality through decoding and reencoding
Data Source
AI summary
A wireless communication system enabling multihop communication while maintaining the system throughput and preventing degradation of the user throughput. In the system, a BS (base station) determines the relaying method (whether an RS performs reproduction relay or nonreproduction relay) of the RS (relaying station) and the MCS of multihop communication according to the reception quality (the line quality among an MS2, the RS, and the BS) of the pilot for nonreproduction relay, the reception quality (the line quality between the RS and the BS) of the pilot 2 for reproduction relay, and the line quality (the line quality between the MS2 and the RS) measured at the RS. The determination result is transmitted as relay information to the RS and to the MS2 (a mobile station (2)) through the RS. The MS2 encodes and modulates the uplink data with the MCS based on the relay information and transmits the data to the RS. The RS relays the uplink data while selecting nonreproduction relay or reproduction relay according to the relay information.