Uplink Scheduling Request Optimization in 5G Wireless Systems
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Solution Overview
Problem
Current uplink scheduling methods in 5G wireless communication systems face inefficiencies due to high signaling and interaction overhead, leading to increased latency and reduced communication efficiency, particularly in contention-based random access processes.
Innovation Solution
A method and apparatus for requesting uplink scheduling that involves determining uplink scheduling request channel information, transmitting an uplink scheduling request signal with UE identifier information, and receiving a resource grant, optimizing the process by reducing the number of interaction steps and utilizing UE-specific reference signals to improve resource allocation and conflict resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional contention-based random access process is used for uplink scheduling, then UEs can acquire uplink resources, but signaling overhead and interaction steps increase, leading to higher latency and reduced communication efficiency
Solution Approach 1:
The base station pre-configures uplink scheduling request resources and parameters for UEs before they need to request uplink resources. This includes providing SR resources, power ramping parameters, and backoff parameters in advance through RRC signaling or system information, eliminating the need for multiple interaction steps during actual resource request
Solution Approach 2:
The patent extracts and separates the scheduling request transmission from the traditional random access procedure. UEs in RRC connected state can directly transmit scheduling requests on dedicated PUCCH resources or PUSCH resources without going through the full random access preamble transmission, contention resolution, and grant reception steps, thereby reducing signaling overhead and latency
2Loss of time
If traditional uplink scheduling request method is used, then UEs can obtain uplink grants, but the number of interaction steps increases latency
Solution Approach 1:
The patent merges the scheduling request transmission with existing uplink data transmission or control channel resources. When UEs have uplink data to transmit, they can embed scheduling request information in the PUSCH transmission or use PUCCH resources that are already allocated for control information, combining multiple functions into a single transmission step and reducing overall latency
Solution Approach 2:
The patent allows UEs to skip certain intermediate steps of the traditional random access procedure. UEs in connected state can directly transmit scheduling requests on dedicated resources without performing preamble transmission, waiting for random access response, or undergoing contention resolution, thereby rushing through the essential function of resource request while eliminating unnecessary delays
3Reliability
If UE transmits scheduling request with identifier information, then base station can provide accurate resource allocation, but resource allocation complexity increases
Solution Approach 1:
The patent enables UEs to self-configure their scheduling request transmissions by selecting appropriate PUCCH resources, determining transmit power using provided parameters, and formatting requests with their identifiers. The base station provides configuration parameters (resources, power ramping, backoff) in advance, and UEs autonomously apply these configurations without requiring complex real-time negotiations, thereby improving reliability while keeping allocation manageable
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The present disclosure discloses a method for responding to uplink scheduling request, user equipment and base station equipment. The method comprises: determining uplink scheduling request channel information; transmitting an uplink scheduling request signal generated according to the uplink scheduling request channel information to a base station, the uplink scheduling request signal containing UE identifier information; and receiving the uplink scheduling request response signal fed back by the base station, and acquiring an uplink transmission resource grant in the uplink scheduling request response signal by using the UE identifier information. Completing an uplink scheduling request by using the contention-based random access process is optimized, and the uplink scheduling request process may lead to simple flow and high communication efficiency.