Resource Block Candidate Selection for Wireless Retransmissions
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Solution Overview
Problem
Conventional communication systems face inefficiencies in achieving scheduling gain for retransmissions in wireless communication systems, particularly in OFDMA systems, due to high control signaling overhead and reduced power saving from discontinuous reception in asynchronous ARQ operations.
Innovation Solution
The method involves selecting resource block candidates for retransmissions that can be semi-blindly detected by the receiver, reducing the need for control signaling and maintaining scheduling gain by pre-configuring or feedback-based selection of these candidates, allowing for hybrid ARQ operation between synchronous and asynchronous modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If asynchronous ARQ operation is used to achieve scheduling gain for retransmissions, then scheduling flexibility is improved, but control signaling overhead increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring a set of candidate resource blocks for retransmissions before the actual retransmission occurs. The receiver is provided with this pre-determined candidate set, allowing it to perform semi-blind detection without requiring real-time control signaling for each possible retransmission scenario. This resolves the contradiction by maintaining scheduling flexibility while reducing control signaling overhead through advance preparation of resource allocation options.
Solution Approach 2:
The patent segments the resource allocation space into a predefined set of candidate resource blocks that are potential destinations for retransmissions. By dividing the possible retransmission locations into discrete, pre-identified segments, the system can use semi-blind detection to identify the actual retransmission location without needing to signal all possible locations, thus reducing control overhead while maintaining flexibility.
2Adaptability or versatility
If control signaling is transmitted for each retransmission to maintain scheduling gain, then scheduling flexibility is preserved, but power saving from discontinuous reception is reduced
Solution Approach 1:
The patent applies preliminary action by pre-determining and providing the receiver with a set of candidate resource blocks before retransmission occurs. This allows the receiver to perform semi-blind detection without continuously monitoring all possible resource blocks for control signaling, enabling discontinuous reception and saving power while maintaining scheduling flexibility through the pre-configured candidate set.
Solution Approach 2:
The patent applies self-service by enabling the receiver to autonomously perform semi-blind detection to identify retransmission locations using the pre-provided candidate set. The receiver uses its own processing capabilities and the provided candidate information to determine where retransmissions occur, eliminating the need for continuous control signaling and enabling power-saving discontinuous reception operations.
Data Source
AI summary
A method of transmitting data packets over a plurality of dynamically allocated resource blocks in at least one or a combination of a time, code or frequency domain on a shared channel of a wireless communication system, comprising the steps of selecting a number of resource block candidates for potential transmission of data packets destined for a receiver and transmitting the data packet to the receiver using at least one allocated resource block from the selected resource block candidates. The invention also relates to a corresponding method of decoding data packets, a transmitter, receiver and communication system.