Initial CORESET Beam Selection via MAC-CE Signaling

The patent applies preliminary action by pre-configuring alternative beams and search spaces before beam failure occurs. The base station prepares a set of candidate beams and their corresponding search space configurations in advance, so when the original beam becomes unavailable, the user equipment can immediately switch to alternative pre-configured beams without waiting for reconfiguration, thus maintaining synchronization and communication efficiency

The patent introduces search space as an intermediary mechanism between the physical beam and the control information. The search space contains configuration information about multiple beams, acting as a mediator that translates physical beam availability into control signal delivery. When the original beam fails, the search space provides alternative beam configurations that bridge the gap between beam failure and communication continuity

The patent applies segmentation by dividing the beam configuration into separate manageable components: a first CORESET with first search space for initial access, and a second CORESET with second search space for beam recovery. Each CORESET can be independently configured and managed, reducing the complexity of handling multiple beams overall. The segmentation allows the system to manage beam diversity through modular structures rather than a monolithic complex configuration

The patent implements universality by designing the search space mechanism to serve multiple functions: it initially guides user equipment during first access, then provides alternative beam configurations during beam recovery. The same search space structure handles both initial access and beam recovery scenarios, reducing the need for separate dedicated configurations for each function and thereby reducing overall device complexity while maintaining adaptability