Slice-Aware Random Access Reporting for RACH Resource Differentiation
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Solution Overview
Problem
Existing wireless communication systems struggle to differentiate and prioritize random access procedures for different network slices, leading to inefficiencies and potential failures in network slicing scenarios.
Innovation Solution
Implementing mechanisms for network nodes and wireless devices to identify and report slice information, allowing for differentiated treatment of random access procedures based on specific slice resources and reporting methods such as MAC subheaders, MAC CEs, and RRC signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If network nodes use shared RACH resources for all slices, then device complexity is reduced, but the ability to differentiate and prioritize random access procedures for specific slices deteriorates
Solution Approach 1:
The patent segments RACH resources into dedicated resources for specific slices and shared resources for multiple slices. Network nodes configure slice-specific RACH resources (first resources) that can be exclusively used by particular slices, while maintaining shared RACH resources (second resources) for general use. This segmentation enables differentiated random access procedures for different slices without requiring complete resource isolation, thus resolving the contradiction between simplicity and adaptability.
Solution Approach 2:
The patent introduces MAC subheaders and MAC control elements as intermediary mechanisms to carry slice information in random access messages. These intermediaries enable network nodes to identify and differentiate slice-specific procedures without requiring complex dedicated physical channels for each slice. The MAC layer intermediaries provide a balanced approach between resource sharing and slice differentiation.
2Adaptability or versatility
If network nodes implement slice-specific RACH resources, then random access procedure differentiation is improved, but device complexity and configuration overhead increase
Solution Approach 1:
The patent segments RACH resources into dedicated resources for specific slices and shared resources for multiple slices. Network nodes configure slice-specific RACH resources (first resources) that can be exclusively used by particular slices, while maintaining shared RACH resources (second resources) for general use. This segmentation enables differentiated random access procedures for different slices without requiring complete resource isolation, thus resolving the contradiction between simplicity and adaptability.
Solution Approach 2:
The patent makes MAC subheaders and MAC control elements universal structures that can serve multiple functions: carrying slice information for differentiation, maintaining backward compatibility with existing random access procedures, and providing flexibility for future enhancements. This multi-functionality reduces the need for completely new dedicated mechanisms for each slice.
3Loss of information
If network nodes use MAC subheaders and MAC CEs for slice information reporting, then slice identification capability is improved, but signaling overhead increases
Solution Approach 1:
The patent introduces MAC subheaders and MAC control elements as intermediary structures to carry slice information. These intermediaries are integrated into the existing MAC layer protocol, allowing efficient transmission of slice identifiers without requiring separate dedicated signaling channels. The MAC subheader approach provides compact encoding that minimizes overhead while maintaining reliable slice identification.
Solution Approach 2:
The patent applies partial action by including slice information only when necessary for differentiation, rather than universally attaching slice identifiers to all random access messages. The network node determines whether to include slice information based on the specific RACH resources used and the configuration of the wireless device, thereby avoiding unnecessary signaling overhead in cases where slice differentiation is not required.
4Reliability
If network nodes implement comprehensive failure reporting mechanisms, then reliability is improved, but processing complexity and time increase
Solution Approach 1:
The patent implements preliminary action by pre-configuring network nodes with slice-specific failure detection parameters and reporting thresholds before random access procedures occur. The network node is预先 configured with information about which slices use which RACH resources and what failure criteria apply to each slice, enabling rapid failure detection and reporting without requiring complex real-time analysis during failure events.
Solution Approach 2:
The patent segments failure reporting into slice-specific failure detection mechanisms that operate independently for each slice. When a failure occurs, the network node can quickly identify which slice is affected based on the RACH resources used and report only the relevant slice failure information, rather than analyzing all possible slices. This segmentation significantly reduces processing time while maintaining comprehensive reliability.
Data Source
AI summary
A method, network node, and wireless device, WD, for reporting mechanisms for slice information are described. According to one aspect, a network node configured to communicate with a WD is described. The network node includes processing circuitry configured to allocate (S148) at least one resource of a plurality of resources to at least one slice of a plurality of slices; and determine (S150), from a random access, RA, message received from the WD, the at least one slice associated with the RA message based at least in part on the at least one resource on which the RA message is received.