SSB Cell Configuration for Seamless TRXP Mobility
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Solution Overview
Problem
Current cellular communication systems face challenges in achieving seamless and robust multi-Transmission/Reception point (TRXP) mobility while maintaining efficient use of radio resources.
Innovation Solution
The proposed technology arranges Synchronization Signal Block (SSB) transmissions from TRXPs to create unique cells and combined cells, allowing for selective transmission and reception, and enabling seamless handover between TRXPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple TRXPs transmit identical signals to create a combined cell for seamless handover, then handover robustness is improved, but radio resource efficiency deteriorates
Solution Approach 1:
The patent segments the cell concept into two types: unique cells (served by a single TRXP) and combined cells (served by multiple TRXPs transmitting identical signals). This segmentation allows the system to apply different transmission strategies selectively - using combined cells only where handover robustness is needed while using unique cells for normal efficient operation, thereby resolving the contradiction between handover reliability and radio resource efficiency
2Adaptability or versatility
If the system supports UE selection between multiple TRXPs for downlink transmission, then transmission selectivity is improved, but system complexity increases
Solution Approach 1:
The patent implements preliminary action by having TRXPs transmit reference signals (such as SSBs) that enable UEs to identify and evaluate multiple TRXP candidates before actual data transmission. The UE performs measurements and reports back to the network, which then selects the optimal TRXP for downlink transmission. This preliminary evaluation phase simplifies the actual transmission selection process and reduces real-time system complexity while maintaining high adaptability
Data Source
AI summary
A method for arranging transmission of SSBs comprises transmitting (S1), from a first TRXP of a cellular telecommunication system, of first SSBs at a carrier. The first SSBs define a first cell. The first cell is unique for the first 5TRXP. The method further comprises transmitting (S2), from the first TRXP, of second SSBs at the carrier. The second SSBs define a second cell. The second cell is a combined cell of the first TRXP and at least one neighbouring, second TRXP. A method for cell assignment based on multiple SSBs is also disclosed, as well as TRXPs and network nodes for implementing the methods.