Cooperative Relay Transmission for Concurrent Codeword Delivery
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Solution Overview
Problem
Current communication systems, particularly relay channels and networks, face limitations in transmission efficiency due to mutually exclusive transmitting between transmitters and relays, leading to reduced transmission rates.
Innovation Solution
A method and apparatus for cooperative transmission where a first codeword is transmitted from a transmitter to a relay, and a second codeword based on the first is transmitted by the relay concurrently with a third codeword from the transmitter, allowing for simultaneous transmission and overcoming the limitations of existing relaying strategies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the relay transmits a codeword based on a first codeword in a subsequent time block, then the relay can process and forward information reliably, but the transmitter cannot transmit new data concurrently, reducing overall transmission rate
Solution Approach 1:
The patent enables continuous transmission by allowing the transmitter to send a third codeword in the second time block while the relay sends the second codeword based on the first codeword. This eliminates idle time periods and ensures both transmitters are continuously active, maintaining useful action throughout the transmission process.
Solution Approach 2:
The relay performs preliminary decoding and processing of the first codeword during the first time block, preparing the second codeword in advance. This preliminary action allows the relay to have the second codeword ready for concurrent transmission in the second time block, enabling the transmitter to also send new data simultaneously.
2Ease of operation
If the transmitter and relay transmit in mutually exclusive time blocks, then the relay can decode and forward messages, but the transmission efficiency is reduced due to idle time
Solution Approach 1:
The patent implements a periodic transmission scheme where the transmitter alternates between sending first codewords (which the relay decodes) and third codewords (new data). This periodic structure with alternating transmission phases allows the relay to decode during one period while the transmitter sends new data in the next period, eliminating idle time and improving efficiency.
3Device complexity
If the relay amplifies or compresses the received signal, then the relay can forward information with reduced complexity, but the transmission rate suffers due to sequential transmission
Solution Approach 1:
By enabling concurrent transmission of the second codeword (processed by relay) and third codeword (new data from transmitter), the system eliminates idle time periods. This continuous utilization of both transmitters maintains the simplicity of relay processing while dramatically improving overall transmission rate.
Data Source
AI summary
The present invention provides, in one embodiment, a method of transmitting a message. The method includes transmitting a first codeword from a transmitter to a relay. The method also includes subsequently transmitting a second codeword based on the first codeword from the relay and a third codeword from the transmitter wherein the second and third codewords are transmitted concurrently.