Uplink Resource Allocation for Low-Latency Wireless Transmission
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Solution Overview
Problem
Current wireless communication systems face challenges in achieving ultra-reliable and low-latency communications, particularly in the 5G system, due to delays caused by storing uplink transmission data in buffers until the next radio resource allocation timing, which hinders the implementation of services requiring extremely low latency like tactile communication and augmented reality.
Innovation Solution
A transmission device is configured to permit uplink radio resource allocation for transmission data after Logical Channel Prioritization (LCP) processing, allowing for immediate transmission of data by multiplexing the first wireless service data in part of the radio resource allocated to the second wireless service, thereby reducing transmission delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If uplink transmission data is stored in buffers until the next radio resource allocation timing, then radio resource allocation can be performed systematically, but transmission delay increases which prevents ultra-reliable and low-latency communications
Solution Approach 1:
The patent applies preliminary action by performing Logical Channel Prioritization (LCP) processing before radio resource allocation is finalized. This allows the system to pre-determine the priority order of different logical channels and their data, so that when uplink transmission data arrives, it can be immediately allocated to appropriate radio resources without waiting for the next allocation timing. The LCP processing establishes a prioritization framework in advance, enabling rapid response to urgent transmissions while maintaining systematic resource management.
Solution Approach 2:
The patent introduces dynamics by allowing flexible adjustment of radio resource allocation based on real-time channel conditions and data priority. The system dynamically modifies the allocation process by inserting LCP processing between data arrival and final resource assignment, enabling the allocation scheme to adapt to varying transmission requirements. This dynamic approach allows urgent data to be prioritized and transmitted immediately rather than following a rigid periodic allocation schedule.
2Ease of operation
If radio resources are allocated periodically, then resource management is simplified, but transmission latency increases for time-sensitive data
Solution Approach 1:
The patent applies preliminary action by establishing the Logical Channel Prioritization (LCP) processing step before the periodic radio resource allocation occurs. This pre-processing determines the priority ranking of different logical channels and their associated data, creating a ready-to-execute prioritization scheme. When data arrives at the periodic allocation timing, the system can immediately allocate resources according to the pre-determined priorities without additional complex decision-making, thus maintaining simple periodic management while reducing latency for high-priority data.
3Reliability
If Logical Channel Prioritization processing is performed before radio resource allocation, then transmission priority can be determined, but additional processing steps increase complexity
Solution Approach 1:
The patent applies preliminary action by performing Logical Channel Prioritization (LCP) processing in advance, before the actual radio resource allocation takes place. This pre-processing step establishes the priority order of different logical channels and their data, creating a deterministic framework for resource allocation. By determining priorities beforehand, the system ensures reliable priority-based transmission decisions while the actual allocation process remains straightforward, as it only needs to follow the pre-established priority rankings rather than making complex real-time decisions.
Data Source
AI summary
A transmission device includes a communication circuit configured to wirelessly communicate with a reception device, by using a plurality of wireless services including a first wireless service having a first priority and a second wireless service having a second priority that is a priority lower than the first priority, and a processing circuit configured to perform, in accordance with a first information element, allocating of an uplink radio resource to transmission data of the first wireless service, the allocating of the uplink radio resource being performed in a situation, the situation being a situation that a medium access control-protocol data unit (MAC-PDU) has been generated or can be generated in response to allocating the uplink radio resource to a transmission data of the second wireless service, the first information element indicating a value configured to control logical channel prioritization (LCP) procedure.