Contention-Based Uplink Channel Segmentation for Latency Reduction
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Solution Overview
Problem
Radio access systems face challenges in reducing uplink processing latency and efficiently managing contention-based uplink channels, particularly in allocating and identifying resources for user equipment (UE) without initial scheduling requests.
Innovation Solution
The method involves a user equipment (UE) receiving a contention-based identifier from a base station, which allows for the allocation and use of a contention-based uplink channel, enabling efficient transmission and reception of uplink signals by utilizing a CB identifier for resource allocation and classification, and reducing latency and collision probabilities based on service type and latency requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If contention-based uplink channels are used to reduce uplink processing latency, then uplink transmission speed is improved, but resource allocation complexity and collision probability increase
Solution Approach 1:
The patent segments the contention-based uplink channel into multiple sub-channels, each identified by a unique CB identifier. This segmentation allows the base station to allocate specific sub-channels to different user equipment, reducing overall resource allocation complexity while maintaining high transmission speed through parallel channel usage.
Solution Approach 2:
The base station performs preliminary allocation of CB identifiers and associated resource information to user equipment before actual uplink transmission. This preliminary action includes providing first messages with CB identifiers and second messages with allocation information, enabling UEs to quickly access pre-assigned resources without complex real-time allocation decisions.
2Speed
If contention-based uplink channels are used to reduce uplink processing latency, then uplink transmission speed is improved, but collision probability increases
Solution Approach 1:
By dividing the contention-based uplink channel into multiple sub-channels identified by unique CB identifiers, the patent reduces collision probability through spatial and logical separation. Each UE transmits on its assigned sub-channel, minimizing interference and collisions while maintaining high transmission speed.
Solution Approach 2:
The base station performs preliminary allocation of CB identifiers and resource information to UEs before transmission. This includes providing first messages with CB identifiers and second messages with allocation information, enabling UEs to access pre-assigned resources without real-time conflicts, thus reducing collisions while maintaining speed.
3Productivity
If CB identifiers are allocated for resource classification, then resource allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The patent introduces CB identifiers to segment and classify uplink resources into distinct sub-channels. This segmentation improves resource allocation efficiency by enabling precise resource assignment and classification while managing system complexity through structured identifier management at the base station.
Solution Approach 2:
The base station performs preliminary allocation of CB identifiers and associated resource information to UEs through first and second messages. This preliminary classification and assignment improve resource allocation efficiency by establishing clear resource mappings before transmission, while the base station manages the complexity of identifier management centrally.
Data Source
AI summary
The present invention discloses various methods and apparatuses for allocating identifiers and resources associated with a contention-based uplink channel and using the identifiers and resources. An uplink (UL) signal transmission method using a contention-based identifier (CB identifier) according to one embodiment of the present invention comprises a step in which user equipment receives, from a base station, a first message containing a CD identifier (CB-RNTI); a step in which the user equipment receives, from the base station, a second message containing information on the allocation of the contention-based uplink (CB UL) channel associated with the CB identifier; and a step in which the user equipment transmits an UL signal to the base station via the CB UL channel.