Temporary SSB Burst Configuration for Secondary Cell Activation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication technologies face a significant activation delay when activating a secondary serving cell in terminal devices due to the large periodicity of synchronization signal block bursts (SSB bursts), which affects the efficiency of cell detection and automatic gain control (AGC) processes.
Innovation Solution
Implementing a temporary SSB burst configuration that includes periodicity and/or offset for sending a temporary SSB burst without a Physical Broadcast Channel (PBCH), allowing the terminal device to rapidly activate the secondary serving cell by using both regular and temporary SSB bursts, thereby reducing cell detection and AGC duration and avoiding conflicts with other terminal devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a regular SSB burst with large periodicity is used for secondary serving cell activation, then initial access operations of terminal devices are supported, but activation delay of the secondary serving cell becomes large
Solution Approach 1:
The network device sends a temporary SSB burst before the terminal device needs to activate the secondary serving cell. This preliminary action provides synchronization signals in advance, allowing the terminal device to perform cell detection and AGC operations faster when activation is needed, thereby reducing activation delay without affecting initial access operations
Solution Approach 2:
The SSB transmission is segmented into two types: regular SSB bursts for initial access operations and temporary SSB bursts for secondary serving cell activation. This segmentation allows each type to be optimized for its specific purpose - regular SSBs maintain reliability for initial access, while temporary SSBs reduce activation delay by providing earlier synchronization signals
2Loss of time
If temporary SSB burst is sent with different periodicity, then activation delay is decreased, but signaling overhead increases
Solution Approach 1:
The network device sends temporary SSB burst configuration information to the terminal device in advance, including the periodicity and offset for sending temporary SSB bursts. This preliminary configuration allows the terminal device to know when to expect temporary SSB bursts, reducing the need for additional signaling during activation and thereby reducing signaling overhead while maintaining fast activation
Solution Approach 2:
The system dynamically adjusts SSB transmission by using different periodicities for regular and temporary SSB bursts based on the specific activation scenario. This dynamic approach allows optimization of activation delay for each case while managing signaling overhead through selective configuration rather than constant high-rate transmissions
3Loss of information
If temporary SSB burst is sent without PBCH, then signaling overhead is reduced, but terminal device may misidentify it as regular SSB burst
Solution Approach 1:
The temporary SSB burst is designed with local quality differences - it lacks the PBCH that characterizes regular SSB bursts. The terminal device uses this local quality difference (absence of PBCH) along with the pre-configured temporary SSB burst parameters to reliably distinguish temporary SSB bursts from regular ones, reducing signaling overhead while maintaining identification accuracy
Solution Approach 2:
The terminal device uses the pre-configured temporary SSB burst parameters (periodicity, offset) as a reference to verify whether a received SSB burst is temporary or regular. This feedback mechanism allows the terminal device to correctly identify temporary SSB bursts even without PBCH, preventing misidentification while maintaining reduced signaling overhead
Data Source
AI summary
This application relates to the field of communication technologies and discloses a communication method and a communication apparatus. One example method includes: A network device sends temporary SSB burst configuration information to a terminal device served by a secondary serving cell, where the temporary SSB burst configuration information includes a periodicity and/or an offset for sending a temporary SSB burst by the network device in the secondary serving cell configured for the terminal device. The network device sends a temporary SSB burst in the secondary serving cell based on the temporary SSB burst configuration information, where a temporary SSB included in the temporary SSB burst does not include a PBCH.