What is inactivity timer in LTE?
When the eNodeB detects a UE which does not have any traffic to send and receive during a defined period of time, usually referred to an inactivity timer (20s, 10s etc…) which is defined in eNodeB and also is configurable, then the eNB can initiate procedures to place the UE in idle mode.
What is UE disconnection timer in LTE?
The purpose of the PDN Disconnect procedure is for a UE to request the network to disconnect from one PDN. In this message, The UE shall set the value of Linked EPS Bearer Identity IE as the EPS Bearer Identity of default bearer associated with the PDN for which UE is sending the disconnect request.
What is idle mode DRX?
DRX can be employed in both idle and connected modes in LTE, but the exact functionality differs to some extent. In idle mode, the DRX cycle is the same thing as the paging cycle, as the UE expects to only receive paging messages. The UE reads the paging channel at certain subframes within specific radio frames.
What is PDN in LTE?
The PDN GW is the point of interconnect between the EPC and the external IP networks. These networks are called PDN (Packet Data Network), hence the name. The PDN GW also performs various functions such as IP address / IP prefix allocation or policy control and charging.
What is idle mode in LTE?
LTE has specified two UE states i.e. Idle mode and connected mode to avoid unnecessary signalling. When the UE does not have any data to send it is said to be in idle mode, and when the data is being send or communication is taking place then the UE is said to be in connected state.
What is RRC IDLE state in LTE?
RRC Idle State In this LTE UE can receive broadcast or multi-cast data, it will monitor a paging channel to detect incoming calls, it will perform neighbor cell measurements and does cell selection as well as reselection and acquires system information.
What is DRX cycle in LTE?
DRX in the LTE sense means that the UE is not monitoring the PDCCH in the given sub frame and is allowed to go to power saving mode. As uplink is scheduled in downlink PDCCH, the DRX parameter impacts both uplink and downlink performance for a UE.
What is DTX in LTE?
DRX stands for “Discontinous Reception” and DTX stands for “Discontinous Transmission”. When you are talking about ‘Reception’ and ‘Transmission’, you may often get confused with ‘direction of data flow’. Therefore, DRX means ‘Discontinous Reception by UE’ and DTX means ‘Discontinous Transmission by UE’.
What is NAS and as in LTE?
The Non-Access Stratum is a set of protocols in the Evolved Packet System. The NAS is used to convey non-radio signalling between the User Equipment (UE) and the Mobility Management Entity (MME) for an LTE/E-UTRAN access. NAS.
What is the difference between idle and connected mode in LTE?
What does the 30 sec inactivity timer mean?
– 30 sec inactivity timer duration, the eNodeB should wait 20 seconds more in connected mode to release the connection. So, now the drop risk is higher even there is no active traffic. As a conclusion, does it mean we do optimization in the network with reducing the mentioned timer value?
What are the different types of LTE timers?
LTE Timers This page covers LTE timers which include T300, T301, T303, T304, T305, T310, T311, T320 and T321.
When does an LTE UE go into idle mode?
LTE. UE Inactivity Timer. When the eNodeB detects a UE which does not have any traffic to send and receive during a defined period of time, usually referred to an inactivity timer (20s, 10s etc…) which is defined in eNodeB and also is configurable, then the eNB can initiate procedures to place the UE in idle mode.
How does a smaller value of inactivity timer show improvement in call drop rate stats?
Smaller value of inactivity timer shows improvement in Call Drop Rate statistics, but in high loaded network it might be cause for setup degradation due to congestion which is related with more frequent RRC connection setup requests. I’m a bit confused. How will a smaller value of inactivity timer show improvement in call drop rate stats?