PRACH RO Grouping With Flexible SSB Index Association
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Solution Overview
Problem
The existing communication systems are limited by fixed SSB indexes associated with different ROs, restricting the flexibility in adjusting the quantity of SSBs sent by the radio access network device, which affects the uplink coverage of the physical random-access channel (PRACH).
Innovation Solution
The method allows for flexible adjustment of the quantity of SSBs by associating multiple ROs with the same SSB index, enabling the radio access network device to determine K ROs, where K is greater than 1, and these ROs can have different SSB indexes, thereby improving the coverage performance of the uplink PRACH.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed SSB indexes are associated with different ROs, then the radio access network device can perform combined decoding based on preambles received in different ROs, but the quantity of SSBs sent by the radio access network device is limited and cannot be flexibly adjusted
Solution Approach 1:
The patent introduces dynamic association between ROs and SSB indexes, where the association relationship can be flexibly configured rather than fixed. The network can dynamically adjust which SSB indexes are associated with which ROs based on current system conditions and requirements, enabling flexible adjustment of SSB quantity while maintaining combined decoding capability through configurable association parameters
Solution Approach 2:
The patent changes the parameter of SSB index association from fixed to configurable. By introducing configuration information that allows flexible setting of SSB index associations with ROs, the system can adapt the quantity and combination of SSBs without compromising the ability to perform combined decoding on preambles received across different ROs
2Reliability
If the quantity of SSBs is increased to improve uplink coverage, then coverage performance of uplink PRACH is improved, but the system complexity increases due to fixed association constraints
Solution Approach 1:
The patent enables dynamic configuration of SSB-RO associations, allowing the system to adaptively manage coverage enhancement without fixed constraints. The configurable association mechanism simplifies system complexity by providing flexible control over which SSBs are associated with which ROs, making it easier to increase SSB quantity for coverage while managing system configuration
3Ease of manufacture
If SSB indexes are fixedly associated with ROs, then the system structure is simple and easy to implement, but the quantity of SSBs that can be sent is restricted to integer multiples
Solution Approach 1:
The patent transitions from fixed to dynamic association between SSB indexes and ROs. The configurable association mechanism maintains implementation simplicity while significantly improving flexibility in SSB quantity selection, allowing the system to send any required number of SSBs without being constrained by integer multiple requirements of fixed association structures
Data Source
AI summary
A communication method includes: receiving configuration information from a radio access network device, where the configuration information is for configuring a quantity K of ROs in one RO group, and K is an integer greater than 1; and determining the K ROs based on the configuration information, where the K ROs are all associated with a same SSB index, the K ROs include at least two ROs, and the at least two ROs are further associated with different SSB indexes.