Random Access Resource Configuration via SSB Index Offsets
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently determining and configuring time-frequency resources during the random access process, particularly in 5G networks, leading to contention issues and reduced random access success rates.
Innovation Solution
The method involves a terminal receiving resource configuration information from a base station, determining time-frequency resources based on pre-configured and offset configuration information, and performing data transmission on these resources, including determining time and frequency domain resources through specific index and offset calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional random access resource allocation methods are used, then device compatibility and ease of implementation are maintained, but resource allocation efficiency deteriorates and contention increases in 5G networks
Solution Approach 1:
The patent changes the parameters of time-frequency resource allocation by introducing offset configuration information and index-based determination methods. Instead of using fixed traditional allocation, the system dynamically adjusts resource positions using offset values (K_offset, L_offset) and indexes (k, l) that map SSBs to random access occasions, thereby improving resource utilization and reducing contention while maintaining compatibility through standardized parameter structures
Solution Approach 2:
The patent segments the time-frequency resource space into distinct random access occasions, each associated with specific SSBs through indexing. By dividing the resource pool into multiple occasions with unique time-frequency positions determined by offset calculations, the system reduces contention by distributing devices across different segments rather than competing for a single shared resource
2Reliability
If more time-frequency resources are allocated for random access, then random access success rate improves, but resource waste increases due to contention and idle periods
Solution Approach 1:
The patent applies preliminary action by pre-configuring offset information and establishing deterministic mapping relationships between SSBs and random access occasions before actual access occurs. This allows devices to predict and select optimal resources in advance, reducing contention and ensuring reliable access without requiring excessive reserved resources, thereby minimizing resource waste while maintaining high reliability
Solution Approach 2:
By dynamically adjusting offset parameters (K_offset for time domain, L_offset for frequency domain) based on network conditions and device distribution, the system optimizes resource allocation density. This parameter change enables the network to allocate resources efficiently - providing enough resources for high reliability access while avoiding the waste that occurs with static over-provisioning
Data Source
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AI summary
The present application provides a method for determining a random access resource by a terminal in a wireless communication system, the method comprising: receiving, from a base station, configuration information corresponding to a synchronization signal block(SSB) including a SSB index, a random access preamble index and a random access channel mask index; determining a random access resource based on the SSB index and the random access channel mask index; determining a random access preamble based on the random access preamble index; and transmitting, to the base station, the random access preamble on the random access resource.