Uplink Resource Request in Self-Contained Subframes
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Solution Overview
Problem
5G NR communication systems do not provide a method for user equipment (UE) to transmit an uplink resource request message to the base station, resulting in UEs being unable to obtain resource configuration information for transmitting uplink data.
Innovation Solution
A communication method where the base station sends downlink control information and data, and receives an uplink resource request message from the UE on specific time domain resources, allowing the base station to allocate an uplink resource and enabling the UE to transmit data with ultra-low latency and high reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If 5G NR proposes self-contained subframe structure with downlink control, service data, and uplink control parts, then the base station can inform UE of resource configuration and transmit service data efficiently, but the UE cannot transmit uplink resource request messages to obtain uplink resource configuration information
Solution Approach 1:
The patent segments the subframe into distinct functional parts (downlink control part, service data part, uplink control part) and identifies a specific gap or opportunity within this structure. By proposing to place uplink resource request messages in the uplink control part or at specific boundaries, the invention adds functionality without disrupting the existing segmented architecture, thus maintaining service data transmission efficiency while enabling uplink resource requests.
Solution Approach 2:
The patent makes the uplink control part serve multiple functions: its original function of carrying uplink control information (UCI) and the new function of carrying uplink resource request messages. This multi-functionality allows the UE to request uplink resources without adding separate signaling channels, thereby maintaining system simplicity while enhancing adaptability.
2Device complexity
If the UE cannot obtain configuration information of uplink resources, then the system structure remains simple, but the UE cannot transmit uplink data to the base station
Solution Approach 1:
The patent enables the UE to self-initiate uplink resource requests by transmitting them in the uplink control part. This self-service mechanism allows the UE to autonomously request resources when needed without complex centralized scheduling, maintaining relatively simple system structure while enabling functional uplink data transmission capability.
3Adaptability or versatility
If uplink resource request messages are transmitted without dedicated resources, then resource allocation flexibility is maintained, but transmission reliability and timing precision deteriorate
Solution Approach 1:
The patent establishes predetermined rules for transmitting uplink resource request messages in the uplink control part of self-contained subframes. By defining specific transmission opportunities and formats in advance, the system maintains flexibility in resource allocation while ensuring reliable transmission timing and format, allowing the base station to efficiently parse and respond to these requests.
Data Source
AI summary
A communication method, a base station, a user equipment (UE), and a communications system. The method includes generating an uplink resource request message including identification information of a first UE, and sending, by the first UE, the uplink resource request message to a base station on a third time domain resource of a first subframe. The first subframe includes a first, second and third time domain resource, the first time domain resource of the first subframe is before the second time domain resource, the second time domain resource is before the third time domain resource, the first time domain resource is used to send first downlink control information, the second time domain resource is used to send downlink data, the first resource indication information indicates a first downlink resource used by base station to send the downlink data to a second UE.