Here I write in short about eNodeB functions, Mobile Management Entity (MME) functions and System Architecture Evolution (SAE) functions.
LTE – eNodeB functions
The eNodeB performs the following functions in LTE:
- Radio Resource Management, Radio Bearer Control, Radio Admission Control,
- Connection Mobility Control, Dynamic allocation of resources to LTE UEs in both Uplink and Downlink (scheduling)
- IP header compression and encryption of user data stream
- Selection of MME at LTE UE attachment
- Routing User Plane data to LTE SAE Gateway
- Scheduling and transmission of paging messages (originated from the MME)
- Scheduling and transmission of broadcast information (originated from the MME or Operations, Administration and Maintenance (OAM)
- Measurement and measurement reporting configuration for mobility and scheduling in LTE
LTE – Mobile Management Entity (MME) functions
The MME performs the following functions in LTE:
- Distribution of paging messages to the LTE eNodeBs
- Security control in LTE call
- Idle state mobility control
- SAE bearer control
- Ciphering and integrity protection of NAS signaling
LTE – System Architecture Evolution (SAE) functions
The System Architecture EvolutionSAE Gateway performs the following functions for LTE:
- Termination of LTE U-plane packets for paging reasons
- Switching of U-plane for supporting UE mobility
- QoS handling and tunnel management
This is only short work of eNodeB, Mobile Management Entity (MME) and System Architecture Evolution (SAE) which I already write in details in previous Topics.
