Cooperative Decoding in Wireless Feeder Networks
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Solution Overview
Problem
Existing wireless feeder networks face challenges in efficiently coupling access base stations with communications networks due to scarce radio frequencies, leading to increased latency and reduced flexibility in deployment and configuration, as well as limitations in data throughput and error correction mechanisms.
Innovation Solution
The method involves grouping wireless network components into feeder clusters with a primary and secondary element, using an additional communications resource to facilitate cooperative decoding, where secondary elements provide decoded data to the primary element to enhance decoding reliability without interfering with regular data transmission, thereby reducing latency and improving throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If techniques such as ARQ, HARQ, or HARQ with soft combining are used to improve data throughput, then error detection and correction reliability is improved, but additional latency is introduced due to retransmission scheduling and handshake protocols
Solution Approach 1:
The patent applies preliminary action by having the secondary element perform decoding in advance and prepare decoded data before it is needed by the primary element. The secondary element decodes resource blocks allocated to the primary element proactively, so that when the primary element needs the decoded data, it is already available, eliminating the need for reactive retransmission and reducing latency.
Solution Approach 2:
The patent introduces an intermediary mechanism where a secondary element acts as a helper that provides decoded data to the primary element through an additional communications resource. This intermediary approach allows the primary element to obtain decoded data without needing to request retransmission, thereby reducing the latency associated with traditional ARQ/HARQ handshake protocols.
2Productivity
If beam-forming techniques are used to improve wireless throughput, then data reception rate is improved, but a large bandwidth wired connection is required between antennas, reducing flexibility in wireless deployment
Solution Approach 1:
The patent segments the decoding function by introducing a secondary element that performs decoding separately from the primary element. This segmentation allows the decoded data to be transmitted through a different communications path (additional communications resource), reducing the bandwidth requirements on the wireless connection while maintaining throughput improvements.
Solution Approach 2:
The patent adds another dimension to the system architecture by introducing an additional communications resource that operates in parallel with the wireless resource. This dimensional addition allows decoded data to be transmitted through a different medium or channel, bypassing the bandwidth constraints of the wireless connection and enabling greater deployment flexibility.
3Adaptability or versatility
If radio frequencies are allocated in advance for wireless backhaul connection, then dedicated wireless connection is established, but the scarcity of radio frequencies limits data throughput
Solution Approach 1:
The patent merges the functions of multiple elements (primary and secondary) to achieve improved throughput. By combining the decoding capabilities of the secondary element with the primary element's reception, the system achieves higher effective throughput without requiring additional scarce radio frequency resources, thus resolving the contradiction between resource scarcity and throughput requirements.
Data Source
AI summary
A wireless feeder network comprises feeder base stations coupled to the communications network and feeder terminals coupled to associated access base stations of the access network. A group of wireless network components form elements of a feeder cluster and the elements of the feeder cluster are connected by an additional communications resource configured to be operated in parallel with the wireless resource of the wireless feeder network. Both a primary and secondary element of the feeder cluster seek to decode at least one resource block allocated to the primary element for reception of data. Information derived from the secondary decoded data is transmitted from the secondary element to the primary element via the additional communications resource. The primary element then performs a revised decoding process additionally using the information received from said secondary element to improve its own decode probability.