INGENIERÍA BÁSICA

None

7 Parameters

Table 7-1 Parameters

MO Parame

ter ID MML Comma nd

Feature

ID Feature

Name Description

TimeAli gnment Timer

TACmd SendPer iod

MOD TATIM ER LST TATIM ER

None None Meaning: Indicates the interval for sending the Timing Advance Command to UEs. This parameter needs to be set only when the TimingAdvCmdOptSwitch parameter is set to ON. If this parameter is set to Invalid, none of parameter settings in the MML Command window takes effect.

GUI Value Range: INVALID(NULL), SF218(218 subframes), SF343(343 subframes), SF608(608 subframes), SF928(928 subframes), SF1248(1248 subframes), SF2528(2528 subframes), SF5088(5088 subframes)

Unit: None

Actual Value Range: INVALID, SF218, SF343, SF608, SF928, SF1248, SF2528, SF5088 Default Value: SF928(928 subframes)

MO Parame

Meaning: Indicates the method of measuring uplink timing offsets. If this parameter is set to INVALID, uplink timing offsets are measured based on the demodulation reference signal (DMRS) for PUSCH or sounding reference signal (SRS). If this parameter is set to ALLMEASMODE, uplink timing offsets are measured based on the DMRS for PUSCH and SRS or based on the DMRS for PUSCH and channel quality indicator (CQI) in PUCCH. In addition, the value ON of the TimingAdvCmdOptSwitch parameter takes effect regardless of the actual parameter setting. That is, the eNodeB always sends the Timing Advance Command to UEs. In this case, it is recommended that the TimeAlignmentTimer parameter be set to

SF10240. The value ALLMEASMODE applies only to LTE FDD cells. The parameter value INVALID takes effect in a cell regardless of the actual parameter setting in any of the following scenarios: (1) The cell is established on an LBBPc. (2) The UlCyclicPrefix parameter is set to EXTENDED_CP. (3) The HighSpeedFlag parameter is set to HIGH_SPEED, ULTRA_HIGH_SPEED, or EXTRA_HIGH_SPEED.

(4) The TX/RX mode of the cell is 2T8R.

GUI Value Range: INVALID(Invalid Timing

Measurement Mode), ALLMEASMODE(All Timing Measurement Mode)

Unit: None

Actual Value Range: INVALID, ALLMEASMODE Default Value: INVALID(Invalid Timing

Measurement Mode)

MO Parame

None None Meaning: Indicates whether to enable the mechanism of optimized resource scheduling for uplink timing.If this parameter is set to OFF, the eNodeB adopts the existing resource scheduling policy for uplink timing, which consumes a large amount of resources used for delivering Timing Advance Commands in large traffic scenarios.If this parameter is set to ON, the eNodeB adopts the mechanism of optimized resource scheduling for uplink timing, which reduces the number of unnecessary Timing Advance Commands to be delivered and reduces resources allocated for uplink timing in large traffic scenarios.This parameter applies only to LTE FDD cells. The parameter value ON is recommended in heavily loaded cells where there is a large number of UEs.

GUI Value Range: OFF(Off), ON(On) Unit: None

Actual Value Range: OFF, ON Default Value: ON(On) TimeAli

None None Meaning:

Indicates whether optimization of the mechanism for delivering the uplink time alignment command takes effect. If the optimization takes effect, the number of unnecessary uplink time alignment commands delivered to motionless or low-mobility UEs can be reduced to save air interface resources and reduce power consumption of UEs in DRX mode. This ensures the uplink time alignment performance if the length of the uplink time alignment timer is set to a large value.

If this parameter is set to ON, it is recommended that the TimeAlignmentTimer parameter be set to

SF10240. A smaller value of the TimeAlignmentTim-er parametTimeAlignmentTim-er, such as SF5120, leads to a highTimeAlignmentTim-er probability of becoming out-of-synchronization in the uplink for UEs in DRX mode.

If this parameter is set to ON, it is recommended that the LongDrxCycle parameter be smaller than or equal to SF320. Otherwise, the uplink time alignment performance of UEs in DRX mode is affected.

GUI Value Range: OFF(Off), ON(On) Unit: None

Actual Value Range: OFF, ON Default Value: ON(On)

MO Parame

None None Meaning: Indicates the length of the uplink time alignment timer for UEs in the cell. A UE is

considered not time-aligned in the uplink if the timer expires.

GUI Value Range: SF500(500 subframes), SF750(750 subframes), SF1280(1280 subframes), SF1920(1920 subframes), SF2560(2560 subframes), SF5120(5120 subframes), SF10240(10240 subframes),

INFINITY(Infinity) Unit: None

Actual Value Range: SF500, SF750, SF1280, SF1920, SF2560, SF5120, SF10240, INFINITY

Default Value: INFINITY(Infinity) RrcCon

Meaning: Indicates the timer used to govern the period in which the eNodeB maintains uplink

synchronization for a UE. After this timer expires, the eNodeB does not send Timing Advance Command to the UE. This parameter does not take effect if it is set to 0. That is, the eNodeB will constantly send Timing Advance Command to the UE to maintain uplink synchronization for the UE.

GUI Value Range: 0~3600 Unit: s

Actual Value Range: 0~3600 Default Value: 180

RrcCon

Meaning: Indicates the length of the UE inactivity timer for UEs that are running non-QCI1 services. If the eNodeB detects that a UE has neither received nor sent data for a duration exceeding the value of this parameter, the eNodeB releases the RRC connection for the UE. If this parameter is set to 0, the UE inactivity timer is not used. If the parameter setting is changed, the change applies to UEs that newly access the network.

GUI Value Range: 0~3600 Unit: s

Actual Value Range: 0~3600 Default Value: 20

MO Parame

Meaning: Indicates the speed flag of the cell. Set this parameter to HIGH_SPEED if the cell is used to provide coverage for an ultra-high-speed railway. Set this parameter to LOW_SPEED in other scenarios.

TDD cells with a bandwidth of 5 MHz or in 8T8R mode can only be configured as low speed cells. TDD cells don't support ULTRA_HIGH_SPEED mode.

GUI Value Range: LOW_SPEED(Low speed cell flag), HIGH_SPEED(High speed cell flag),

ULTRA_HIGH_SPEED(Ultra high speed cell flag), EXTRA_HIGH_SPEED(Extra high speed cell flag) Unit: None

Actual Value Range: LOW_SPEED, HIGH_SPEED, ULTRA_HIGH_SPEED, EXTRA_HIGH_SPEED Default Value: LOW_SPEED(Low speed cell flag) Cell UlCycli

Meaning: Indicates the UL cyclic prefix length of a cell. A cyclic prefix can be a common or extended cyclic prefix. An extended cyclic prefix is generally used in a complex environment with a strong multi-path effect and long delay. In a cell, the UL cyclic prefix length can be different from the DL one. In addition, the UL or DL cyclic prefix length of a cell must be the same as that of the cell using the same BBP. For details, see 3GPP TS 36.211.

GUI Value Range: NORMAL_CP(Normal), EXTENDED_CP(Extended)

Unit: None

Actual Value Range: NORMAL_CP, EXTENDED_CP

Default Value: NORMAL_CP(Normal)

MO Parame

Meaning: Indicates whether to configure sounding reference signal (SRS) resources for UEs in a cell.

The value BOOLEAN_TRUE indicates that SRS resources are available in the cell and can be configured for UEs in the cell. The value

BOOLEAN_FALSE indicates that no SRS resource is available in the cell, and therefore no UE in the cell is configured with SRS resources. This parameter does not take effect on: (1) FDD cell that is established on an LBBPc and uses four or more RX antennas. (2) FDD cell that is established on an LBBPc and uses extended cyclic prefix (CP) in the uplink. (3) TDD cell established on an LBBPc. If this parameter does not take effect on a cell but SRS resources are available in the cell, SRS resources can be configured for UEs in the cell.

GUI Value Range: BOOLEAN_FALSE(False), BOOLEAN_TRUE(True)

Unit: None

Actual Value Range: BOOLEAN_FALSE, BOOLEAN_TRUE

Default Value: BOOLEAN_TRUE(True)

8 ^Counters

Table 8-1 Counters

Counter ID Counter Name Counter

Description Feature ID Feature Name 1526727412 L.ChMeas.PUSCH.

MCS.0

Number of times MCS index 0 is scheduled on the PUSCH

Number of times MCS index 31 is scheduled on the PUSCH

Counter ID Counter Name Counter

Description Feature ID Feature Name 1526728304 L.ChMeas.CCE.UL

Used

Number of PDCCH CCEs used for uplink DCI in a measurement period

Average number of UL synchronized users in a cell

Multi-mode: None

Average number of UEs configured with sounding reference signal (SRS) resources in a cell

Average number of used PUSCH PRBs

Multi-mode: None

Average number of UEs whose uplink timing offsets are measured based on the PUCCH Based on PUCCH

1526730144 L.Traffic.User.TAM eas.PUCCH.Max

Maximum number of UEs whose uplink timing offsets are

measured based on the PUCCH Based on PUCCH

9 ^Glossary

For the acronyms, abbreviations, terms, and definitions, see Glossary.

10 Reference Documents

1. 3GPP TS 36.213, "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures"

2. 3GPP TS 36.321, "Evolved Universal Terrestrial Radio Access (E-UTRA); Medium Access Control"

3. DRX and Signaling Control Feature Parameter Description

4. Random Access Control and RACH Optimization Feature Parameter Description 5. Connection Management Feature Parameter Description