What is Paging in LTE? – Long Term Evolution

cdrx lte

The first subscription may be an LTE (Frequency Division Duplex (FDD)) subscription. The second subscription may be another suitable subscription such as, but not limited to, a GSM subscription. On the other hand, a wireless communication device that includes a plurality of SIMs and connects to two or more separate (or same) subscriptions or networks with two or more subscriptions or networks being active at a given time may be a MSMA communication device. An example MSMA communication device may be a Dual-SIM-Dual-Active (DSDA) communication device, which may include two SIM. In another example, the MSMA device may be a Triple-SIM-Triple-Active (TSTA) communication device, which may include three SIM.

There shouldn’t be any difference as far as the UL packet is concerned. It could be that the when the DL packet arrives at the eNB, the UE might be in sleep state, and the eNB sends the packet as soon as the active period starts. The period before the satisfaction of the equation to start the DRX-Cycle (after inactivity timer expiry or the reception of MAC control element) is ON or OFF ??? We have seen that a number of timers which controls the UE’s DRX state (ON/OFF).

RRC inactivity timers

That is, the inactivity timer duration 730 may overlap with the time the second-subscription activities 740 occur if any of the last 8 subframes of the inactivity timer duration 730 overlaps with at least a portion of the time the second-subscription activities 740 occur. The wireless communication device 200 may include at least one controller, such as a general-purpose processor 206, which may be coupled to a coder/decoder (CODEC) 208. The CODEC 208 may in turn be coupled to a speaker 210 and a microphone 212. The general-purpose processor 206 may also be coupled to at least one memory 214.

What is Pdcch?

PDCCH is a physical channel that carries downlink control information (DCI) and it has characteristics as described below. PDCCH carries DCIs and the DCI carries Transport format, resource allocation, H-ARQ information related to DL-SCH, UL-SCH and PCH.

This DRX limited circuit timer bought out of date thus UE will end up it is limited DRX circuit in addition to enter in this very long DRX circuit. The apparatus of claim 10, wherein the value of the offset comprises a drxcyclestart_offset value and the value of the another timer comprises a value of an onDuration timer. The apparatus of claim 19, wherein the DRX mode comprises a radio resource control (RRC) connected state DRX (CDRX) mode. The apparatus of claim 17, wherein the value of the offset comprises a drxcyclestart_offset value and the value of the another timer comprises a value of an onDuration timer.

There may be several ways, but one of the most common way is to use DRX. DRX is a mechanism in which UE gets into sleep mode for a certain period of time and wake up for another period of time. If you look at the 3GPP roadmaps (they are not secret) you will see that there is constant modification to subtle issues (like the state machine governing how handsets transition between idle, more-or-less connected, and more-or-less transmitting/receiving data) to reduce power. The end duration 760 of the inactivity timer duration 730 may include a number of subframes prior the expiration of the inactivity timer duration 730. In some embodiments, the end duration 760 may be 8 subframes prior to the expiration of the inactivity timer duration 730.

The apparatus of claim 10, wherein the DRX mode comprises a radio resource control (RRC) connected state DRX (CDRX) mode. means for adjusting a value of the inactivity timer based, at least in part, on the determination. The method of claim 10, wherein the value of the offset comprises a drxcyclestart_offset cdrx lte value and the value of the another timer comprises a value of an onDuration timer. The method of claim 1, wherein the DRX mode comprises a radio resource control (RRC) connected state DRX (CDRX) mode. adjusting a value of the inactivity timer based, at least in part, on the determination.

Moreover, any other suitable technique for providing the methods and techniques described herein to a device can be utilized. Those skilled in the art will recognize how best to implement the described functionality for the processing system depending on the particular application and the overall design constraints imposed on the overall system. The processor may be responsible for managing the bus and general processing, including the execution of software stored on the machine-readable media. The processor may be implemented with one or more general-purpose and/or special- purpose processors.

Increasing power efficiency in long-term evolution (LTE) networks for machine-to-machine (M2M) communications

Now let’s get into further details on exactly what happens on UE side when this DRX is working. This is very complicated process especially if both long DRX cycle and short DRX cycle are configured. Then what would be the solution to save the energy on UE side.

cdrx lte

The general-purpose processor 206 may include any suitable data processing device, such as a microprocessor. In the alternative, the general-purpose processor 206 may be any suitable electronic processor, controller, microcontroller, or state machine. The UICC may also provide storage for a phone book and other applications. Alternatively, https://cryptolisting.org/ in a CDMA network, a SIM may be a UICC removable user identity module (R-UIM) or a CDMA Subscriber Identity Module (CSIM) on a card. A SIM card may have a Central Processing Unit (CPU), Read Only Memory (ROM), Random Access Memory (RAM), Electrically Erasable Programmable Read-Only Memory (EEPROM) and Input/Output (I/O) circuits.

Important DRX Parameters/Timers

cdrx lte

Other RATs (such as, but not limited to, HSDPA, EVDO, and the like) may be implemented in a similar manner. Generally, embodiments described herein may be applicable to a MSMS wireless communication device having https://cryptolisting.org/coin/bto/ at least a first SIM and a second SIM. Illustrating with a non-limiting example, the first SIM may be associated with a first subscription, and the second SIM may be associated with a second subscription.

  • With short BSR, UE can inform the amount of data in UL buffer only for one specific LCG (Logical Channel Group).
  • This DRX limited circuit timer bought out of date thus UE will end up it is limited DRX circuit in addition to enter in this very long DRX circuit.
  • 3 is a diagram 300 illustrating an example of a DL frame structure in LTE.
  • It is not necessary that all devices can support up to 400 MHz Bandwidth, hence in NR BWP concept is introduced.
  • Certain aspects of the present disclosure provide an apparatus for wireless communications by a user equipment (UE).
  • The method of claim 10, wherein the value of the offset comprises a drxcyclestart_offset value and the value of the another timer comprises a value of an onDuration timer.

As can be seen, TDMA frame 27 and 28 are also contained in the paging group for CC2 that spans TDMA frames 27 to 34 over 51-multiframe N and N + 1. The same principle applies for EC-GSM-IoT, but in this case the used DRX cycle is negotiated on a per device basis. Once the core network is aware of the location of the UE, it can locate the UE by paging all the cells in the UE’s cdrx lte registration area. Every time the UE moves around, it needs to make sure that the registration area of the new cell has not changed and if it does, then it needs to perform location registration again. For TDD serving cells, all downlink subframes and subframes including DwPTS of the TDD UL/DL configuration indicated by tdd-Config of the cell represent PDCCH-subframes.

The wireless access point may be configured to connect to the Internet or another network over a wired connection. The first cellular connection 132 and the second cellular connection 142 may be made through two-way wireless communication links.

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Further, it should be appreciated that modules and/or other appropriate means for performing the methods and techniques described herein can be downloaded and/or otherwise obtained by a vtm experience chart user terminal and/or base station as applicable. For example, such a device can be coupled to a server to facilitate the transfer of means for performing the methods described herein.

Home LTE NB-IoT 5G(NR-NSA)

What is RRC in LTE?

The Radio Resource Control (RRC) protocol is used in UMTS and LTE on the Air interface. It is a layer that exists between UE and eNB and exists at the IP level. The operation of the RRC is guided by a state machine which defines certain specific states that a UE may be present in.

An Integrated Circuit Card Identity (ICCID) SIM serial number may be printed on the SIM card for identification. However, a SIM may be implemented within a portion of memory of the wireless communication device 200, and thus need not be a separate or removable circuit, chip, or card. In some embodiments, the wireless communication device 110 may establish a wireless connection with a peripheral device (not shown) used in connection with the wireless communication device 110. In some embodiments, the wireless communication device 110 may establish a wireless connection with a wireless access point (not shown), such as over a Wi-Fi connection.

cdrx lte

The paging transport block can have message to one or many UEs which are idle. So the UE has to decode the paging message and check the same. iii) If you have boosto meme access to UE log, you have to check the data reception or SR(Scheduling Request)/BSR(Buffer Status Report) for long enough to trigger CDRX sleep mode.

In addition to these timers the eNodeB’s MAC can also control UE’s DRX behavior by transmitting a command called DRX Command as a MAC Control Element. Does the UE monitors the paging channel every 1.28 seconds regardless of the RRC state (IDLE/CONNECTED) or monitors paging channel only in IDLE state. Any UE that is in RRC Idle mode should wake up and check if there is any message for itself.

What is BSR in LTE?

LTE Quick Reference Go Back To Index Home : www.sharetechnote.com. BSR(Buffer Status Report) BSR is a kind of MAC CE from UE to Network carrying the information on how much data is in UE buffer to be sent out.

By way of illustrating with a non-limiting example, the first cellular connection 132 may be a cdrx lte LTE connection. The second cellular connection 142 may be a LTE, WCDMA, GSM; or 1× connection.

Paging (Wireless Networks)

On network level, the cells within a given Routing Area need to be synchronized within a tolerance of 4 s regarding the start of 51 multiframes. This is to ensure that if a device moves around in the network, the time of its nominal paging group will occur roughly at the same time, irrespective of the actual serving cell. ), the same group would occur in 51 multiframe N + 8, N + 16, etc.

What is CDRX?

▪ Connected Mode Discontinuous Reception (CDRX) is a feature introduced in Release 8 of 3GPP. ▪ CDRX mechanism allows UE to make signaling-free transitions between sleep and awake states.

In other examples, the MSMA communication device may be other suitable multi-SIM communication devices with four or more SIMs, all of which may be active. In some embodiments, the end duration includes 8 subframes before the expiration of the inactivity timer duration. In some embodiments, the at least a portion of the inactivity timer duration includes an end duration of the inactivity timer duration, wherein the end duration includes at least one subframe before expiration of the inactivity timer duration. The method of claim 21, wherein the end duration comprises 8 subframes before the expiration of the inactivity timer duration. The method of claim 20, wherein the at least a portion of the inactivity timer duration comprises an end duration of the inactivity timer duration, wherein the end duration comprises at least one subframe before expiration of the inactivity timer duration.

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