Uplink Control Channel Coexistence Using Orthogonal Sequence Codebooks
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Solution Overview
Problem
Existing wireless communications systems face challenges in coexistence of uplink data transmissions between modern and legacy UEs, leading to loss of uplink payload and resource wastage due to incompatible protocols.
Innovation Solution
A mechanism is introduced where modern UEs construct a codebook of sequences based on a configuration signal, allowing orthogonal multiplexing of uplink payloads with legacy UEs, enabling the base station to demultiplex and decode these payloads effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If modern UEs transmit uplink payload using advanced sequence-based techniques, then uplink communication efficiency is improved, but compatibility with legacy UEs deteriorates causing payload loss
Solution Approach 1:
The resource block is segmented into multiple orthogonal sequences, with each sequence assigned to different UE types (modern or legacy). This segmentation allows the base station to allocate specific sequences to modern UEs for efficient transmission while reserving other sequences for legacy UEs, thus maintaining compatibility. The segmentation of resource blocks into codebook-based sequences enables simultaneous support of both UE types without interference.
Solution Approach 2:
The codebook construction configuration enables the system to serve multiple UE types universally. By configuring the base station to provide codebook construction parameters, both modern UEs (which can utilize the full codebook functionality) and legacy UEs (which use traditional methods) can operate on the same uplink resources. The universal codebook structure allows modern UEs to achieve higher efficiency while legacy UEs maintain backward compatibility.
2Productivity
If multiple UE types share the same uplink resource block, then resource utilization is improved, but signal orthogonality is lost causing demodulation failure
Solution Approach 1:
Different local qualities (orthogonal sequences) are assigned to different UEs within the same resource block. The base station configures specific codebook sequences for modern UEs that are mathematically orthogonal to the sequences used by legacy UEs. This local differentiation in sequence properties ensures that while resources are shared, the orthogonality required for reliable demodulation is maintained through careful sequence selection and configuration.
3Adaptability or versatility
If legacy UEs use traditional uplink transmission methods, then backward compatibility is maintained, but uplink payload capacity is reduced
Solution Approach 1:
The system dynamically adapts transmission methods based on UE type. Legacy UEs continue using traditional transmission methods to maintain backward compatibility, while modern UEs dynamically utilize the configured codebook sequences for enhanced payload capacity. The base station dynamically manages resource allocation, assigning appropriate sequences to each UE type, allowing the system to optimize payload capacity for modern UEs without forcing legacy UEs to adopt incompatible methods.
Data Source
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AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a configuration signal indicating a codebook construction configuration for constructing a codebook of sequences for conveying a first type of uplink payload in a resource block that is orthogonal to a second type of uplink payload transmitted from a second UE in the resource block. The UE may construct the codebook of sequences for the first type of uplink payload according to the codebook construction configuration. The UE may generate the first type of uplink payload for transmission using a first sequence from the codebook of sequences. The UE may transmit the first type of uplink payload in the resource block, wherein the first type of uplink payload is multiplexed in the resource block with the second type of uplink payload from the second UE.