![]() Networks and devices negotiate when devices can sleep.eDRX is a mechanism to save device energy, particularly for mobile-terminated traffic.Spark has set the DL Buffer set to 1 packet. If the UE is not in a paging occasion, the MME does not page the UE. ![]() Spark network is configured to send the “DL Buffer Suggested Packet Count” Optional IE in the DDN ACK to the SGW. Paging Cycle - values that are a power of 2, ranging from 5.12 seconds (that is, 5.12, 10.24, 20.48 seconds and so on) up to a maximum of 2621.44 seconds (43.69 minutes) is supported on the Spark network. The UE can be paged only at paging occasions until the PTW expires. The eDRX consists of values that are a power of 2, ranging from 5.12 seconds (that is, 5.12, 10.24, 20.48 seconds and so on) up to a maximum of 2621.44 seconds (43.69 minutes). The eDRX innovation allows the UE to tell the network how many H-SFN of 10.24s it would like to sleep before checking back in. Each H-SFN value corresponds to a legacy SFN cycle comprised of 1024 radio frames (10.24 seconds) between paging cycles. eDRX ParametersĪ Hyper-System Frame Number (H-SFN) frame structure is defined for regular idle mode DRX. Spark network is set to accept UE requested Paging Time Window (PTW) and eDRX cycle length parameters. In order to use the eDRX feature, the UE requests eDRX parameters during ATTACH and TAU procedures.īased on the network configuration, the mobile network may accept or reject the UEís request to enable the eDRX feature. Whilst not providing the same power savings as PSM for some applications eDRX may provide a good compromise between device reachability and power consumption. For an IoT application, it might be quite acceptable for the device to not be reachable for a few seconds or longer. eDRX allows the time interval during which a device is not listening to the network to be greatly extended. For example, if called, the smartphone might simply ring a fraction of a second later than if DRX was not enabled. The smartphone cannot be contacted by the network whilst it is not listening, but if the period of time is kept to a brief moment, the smartphone user will not experience a noticeable degradation of service. Today, many smartphones use discontinuous reception (DRX) to extend battery life between recharges.īy momentarily switching off the receive section of the radio module for a fraction of a second, the smartphone is able to save power. When eDRX is enabled, the MME pages the UE only at valid paging occasions and the MME sends the eDRX paging parameters to eNodeB during paging.ĮDRX can be used in conjunction with PSM or without to obtain additional power savings. The primary advantage is that without eDRX support, the MME will page the UE unconditionally. ![]() This feature allows the device to connect to a network on a need basis - the device can remain inactive or in sleep mode for minutes, hours or even days, thus increasing the battery life of the device.Įxtended DRX cycles provide UEs longer inactive periods between reading, paging or controlling channels. The Extended Discontinuous Reception (eDRX) feature allows IoT devices to remain inactive for longer periods. Additional information on PSM and other CatM1 features can be found at:Įxtended Discontinuous Reception (eDRX) is an extension of an existing LTE feature (DRX) that can be used by IoT devices to reduce power consumption. This guide covers PSM ( ’Power Save Mode’) settings and trade-offs, for CatM1 modules attached to the Spark LTE CatM1 network.
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