UE-Centric MAC Layer Timing Acquisition
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Solution Overview
Problem
Wireless communication systems with network-centric MAC layers consume excessive power through continuous broadcasts of synchronization signals and system information, which may not be received or utilized by all UEs, and place significant processing burdens on UEs for mobility management, leading to inefficiencies and potential call drops.
Innovation Solution
Implementing a UE-centric MAC layer that allows UEs to receive synchronization signals common to multiple cells in a single frequency network, acquire network timing, and transmit pilot signals concurrently receivable by multiple cells, enabling on-demand system information acquisition and offloading mobility measurements and handover processing to the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network continuously broadcasts synchronization signals and system information, then UEs can discover and access the network, but power consumption increases for both base stations and UEs
Solution Approach 1:
The network broadcasts synchronization signals and system information periodically rather than continuously. UEs can enter sleep modes between broadcast periods and wake up to receive updates, significantly reducing power consumption while maintaining network access capability.
Solution Approach 2:
The patent introduces on-demand system information acquisition where UEs can request specific system information blocks (SIBs) when needed, rather than continuously receiving all broadcasts. This self-service mechanism reduces unnecessary power consumption for UEs that do not need all system information at all times.
2Reliability
If the network continuously broadcasts synchronization signals and system information, then UEs can discover and access the network, but network resources are consumed inefficiently
Solution Approach 1:
The network implements on-demand system information acquisition where UEs can request specific system information blocks (SIBs) when needed, rather than continuously receiving all broadcasts. This self-service mechanism reduces unnecessary power consumption for UEs that do not need all system information at all times.
Solution Approach 2:
The patent changes the broadcast parameters from continuous to periodic, and from all-inclusive to on-demand selective broadcasting. This parameter optimization reduces network resource consumption while maintaining essential network access functionality.
3Reliability
If UEs perform mobility measurements and handover processing autonomously, then network coverage can be maintained, but processing burden on UEs increases leading to potential call drops
Solution Approach 1:
The patent inverts the traditional mobility management architecture by having the network perform mobility measurements and handover processing instead of UEs. Base stations autonomously measure UE signals and execute handover decisions, significantly reducing UE processing complexity while maintaining network coverage continuity.
Solution Approach 2:
The network acts as an intermediary that takes over the complex mobility measurement and handover processing tasks from UEs. This mediator approach relieves UE processing burdens and reduces the risk of call drops due to UE resource constraints.
Data Source
AI summary
Methods, systems, and devices are described for wireless communication. In one method, a method of wireless communication at a user equipment (UE) includes receiving a synchronization signal. The synchronization signal may be common to a plurality of cells within a network. The method further includes acquiring a timing of the network based on the synchronization signal, and transmitting a pilot signal in response to acquiring the timing of the network. The pilot signal may identify the UE and be concurrently receivable by the plurality of cells within the network. Other aspects, features, and embodiments are also claimed and described.