RACH Report Handling with Global Secondary Cell Identification
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Solution Overview
Problem
Existing methods for handling random access procedures in wireless communications networks face inefficiencies, leading to wasted resources and increased latencies, particularly for wireless devices relying on battery power, due to the inability to accurately identify secondary cells using local identifiers like PCI and ARFCN, which are not globally unique.
Innovation Solution
A method where a first node registers and provides identifiers for secondary cells, including global identifiers and cell group information, allowing subsequent nodes to accurately identify and forward RACH reports, optimizing resource use and preventing incorrect configuration of RA procedure parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If local identifiers (PCI and ARFCN) are used to identify secondary cells, then the identification process is simple, but the identifiers are not globally unique leading to inability to accurately identify secondary cells
Solution Approach 1:
The patent embeds multiple levels of identification information within the RACH report structure. Local identifiers (PCI, ARFCN) are nested within cell group identifiers, which are in turn nested within node identifiers. This hierarchical nesting allows both simple local identification and globally unique identification to coexist, resolving the contradiction between simplicity and accuracy.
Solution Approach 2:
The patent adds dimensional depth to the identification system by introducing cell group identifiers and node identifiers as additional layers. Instead of relying solely on the single-dimension local identifiers, the system now operates in multiple dimensions (node level, cell group level, cell level), enabling global uniqueness while maintaining local simplicity.
2Productivity
If RACH reports are forwarded without accurate cell identification, then resource usage is efficient, but incorrect configuration of RA procedure parameters occurs
Solution Approach 1:
The patent introduces cell group identifiers and node identifiers as intermediary elements between the RACH report and the target secondary cell. These intermediaries carry the necessary routing information to ensure RACH reports reach the correct node and cell group, preventing incorrect configuration while maintaining efficient resource usage through direct forwarding mechanisms.
Solution Approach 2:
The patent performs preliminary identification and routing setup by including cell group identifiers and node identifiers in the RACH report before forwarding. This preliminary action ensures that the correct configuration data is prepared in advance, preventing errors during the actual RA procedure execution while maintaining efficient resource utilization.
3Measurement precision
If global identifiers are implemented for secondary cells, then accurate identification is achieved, but the system complexity increases
Solution Approach 1:
The patent segments the global identification system into manageable hierarchical parts: node identifiers, cell group identifiers, and local cell identifiers. This segmentation allows the complex global identification task to be divided into simpler, modular components that can be processed independently at each level, reducing overall system complexity while maintaining global identification accuracy.
4Speed
If RACH reports are not forwarded to the correct node, then processing is faster, but mobility robustness optimization cannot be performed
Solution Approach 1:
The patent performs preliminary routing preparation by including node identifiers and cell group identifiers in the RACH report before forwarding. This preliminary action ensures that the correct destination is identified in advance, enabling fast direct routing to the appropriate node while simultaneously ensuring mobility robustness optimization can be performed by the correct network entity.
Data Source
AI summary
A method for providing one or more indications related to a random access procedure by a first node (101) to a second cell (122, 124), when served by a first cell (121). The second cell (122, 124) is a secondary cell. The first node (111) registers (1401) a first identifier of the second cell (122, 124) and one or more first indications indicating at least one of: i) a second identifier of the first cell (121), ii) a third identifier of a primary secondary cell (123), iii) a fourth identifier of a first network node (111) owning the first cell (121), iv) a fifth identifier of a second network node (112) owning the primary secondary cell (123), and v) an indicator of a cell group the second cell (122, 124) belongs to. The first node (111) also provides (1402) one or more second indications based on the registered identifier and indications.