RACH Resource Partitioning for 5G Load Balancing
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Solution Overview
Problem
The 5G communication system faces challenges in efficiently providing RACH resource partitioning information for various feature combinations, leading to issues with load balancing and performance, as not all possible combinations are supported due to limited RACH resources and a large number of feature combinations in a single cell.
Innovation Solution
The method involves defining RACH-related parameters to be jointly applied to multiple feature combinations and exclusively to one combination, reducing signaling and processing loads, and providing UE with relevant information on RACH partitioning, allowing for efficient resource allocation based on feature combinations and RSRP thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If RACH resources are divided for each feature combination to achieve load balancing, then resource allocation efficiency is improved, but device complexity and signaling overhead increase due to the large number of feature combinations
Solution Approach 1:
The patent segments RACH resources by dividing them into multiple RACH occasions within a RACH occasion set, where each occasion can be associated with different feature combinations. This allows selective activation of specific RACH occasions based on the UE's feature combination without requiring separate resource allocation for every possible combination, thus reducing signaling overhead while maintaining efficient resource allocation.
Solution Approach 2:
The patent introduces dynamic RACH occasion selection based on UE-specific parameters such as RSRP thresholds and feature combinations. The network can dynamically configure which RACH occasions are available for different UE types, allowing the system to adapt resource allocation to current network conditions and UE capabilities without increasing permanent signaling overhead for all possible combinations.
2Reliability
If separate RACH resources are allocated for each feature combination to improve load balancing, then network performance is improved, but the number of required RACH resources increases beyond available capacity
Solution Approach 1:
The patent makes RACH occasions universal by allowing the same RACH occasion to serve multiple feature combinations through dynamic configuration. A single RACH occasion can be assigned to different feature combinations at different times or for different UEs, eliminating the need for dedicated resources for each combination and reducing the total number of required RACH resources while maintaining network performance.
Solution Approach 2:
The patent merges multiple RACH resource allocations into a unified RACH occasion set where resources are shared across different feature combinations. By combining previously separate resource allocations into a single configurable set, the system reduces the total resource requirement while still providing differentiated access for various feature combinations through intelligent allocation within the shared pool.
3Device complexity
If RACH resources are shared across all feature combinations to reduce signaling overhead, then device complexity is reduced, but load balancing performance deteriorates
Solution Approach 1:
The patent applies local quality by associating specific RACH occasions within the set with particular feature combinations or RSRP ranges. Instead of uniform sharing, each RACH occasion can have customized properties and associations tailored to specific UE types or channel conditions, enabling load balancing for different feature combinations while using a shared resource pool that reduces overall signaling overhead.
4Manufacturing precision
If comprehensive RACH resource partitioning information is provided for all feature combinations, then resource allocation accuracy is improved, but information processing load increases
Solution Approach 1:
The patent implements partial information provision by configuring only the RACH occasions that are actually needed for specific feature combinations rather than providing complete partitioning information for all possible combinations. The network configures a RACH occasion set with selective associations to feature combinations, providing sufficient information for accurate allocation without the excessive processing load of comprehensive partitioning data for every conceivable scenario.
Data Source
AI summary
A method and apparatus to enhance uplink coverage is provided. Method for enhancing uplink coverage includes receiving a SIB1 and performing a random access procedure with preamble repetition in case that Reference Signal Received Power (RSRP) of downlink pathloss reference is less than at least one of one or more thresholds related to preamble repetition. The SIB1 comprises a set of parameters related to system information scheduling and a set of parameters related to uplink configuration. Random access resource indicated in the set of parameters related to system information scheduling is used in case that the random access procedure is triggered for System Information (SI) request. Random access resource indicated in the set of parameters related to uplink configuration is used in case that the random access procedure is triggered for data transmission.