Flexible DRB Switch for UDC Activation
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Solution Overview
Problem
Current uplink data compression mechanisms in LTE and NR lack flexibility and timely DRB switching to apply UDC to more suitable DRBs, due to static UDC configuration and limited number of DRBs supporting UDC.
Innovation Solution
The proposed solution allows the UE to select up to N DRBs from those configured for UDC and indicate to the network for UDC activation, enabling flexible DRB selection and rapid switching without initial UDC operation activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If static UDC configuration is used, then configuration simplicity is maintained, but flexibility and timely DRB switching are limited
Solution Approach 1:
The patent implements dynamic DRB selection for UDC by allowing the UE to select up to N DRBs from those configured for UDC and indicate them to the network for activation. This transforms the static configuration into a dynamic mechanism where the UE can adaptively choose suitable DRBs based on current transmission needs, enabling timely switching while maintaining configuration simplicity through predefined DRB configurations.
2Ease of operation
If initial UDC operation activation is performed, then UDC is immediately available, but flexibility in selecting suitable DRBs is reduced
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple DRBs for potential UDC operation without immediately activating UDC. The UE is prepared with a pool of configured DRBs that can be quickly activated when needed. This allows the UE to maintain ease of operation through simple indication of selected DRBs while preserving flexibility to choose the most suitable DRBs for current transmission requirements.
Data Source
AI summary
A plurality of DRBs may be configured for UDC. The DRBs configured for UDC may only be activated for UDC operation upon UE request. The UE may cause selected DRBs to be activated for UDC operation using an uplink RRC message, a user plane control PDU, or a PDCP/SDAP header in a data PDU. A base station may transmit, to a UE, a UDC configuration configuring one or more DRBs to support UDC for the UE without initial UDC operation activation; receive, from the UE, an indication to activate at least one DRB with UDC configured for UDC operation; and, in response to the indication, at least one of: perform, locally, a PDCP entity re-establishment procedure associated with the at least one DRB, or inform the UE to perform a PDCP entity re-establishment procedure associated with the at least one DRB.