User n Advanced - 802.11ah

Capability = Basic Mode

Capability = Advanced Mode

 

Add a new MPDU. The maximum number of user is 63.

Delete the selected MPDU. The minimum number of MPDU is 1.

Add a new MPDU, and its configuration is copied from the selected MPDU.

Move the selected MPDU up by one line and decrease its MPDU Id by 1.

Move the selected MPDU down by one line and increase its MPDU Id by 1.

User Index

Displays the index for each user.

Scrambler

Choice: On|Off

Default: On

Enable or disable the Scrambler. Scrambler scrambles the data to reduce the probability of long sequences of zeros and ones.

The Scrambler is fixed to be ‘ON’ when the Capability is set to be Basic.

Channel Coding Mode

Choice: BCC| LDPC

Default: BCC

Select the Channel Coding mode that encodes the data to enable error correction.

Channel Coding State

Choice: On|Off

Default: On

Enable or disable the channel encoding function. When it's Off, BCC encoder or LDPC encoder will be bypassed.

BCC Interleaver

Choice: On|Off

Default: Off

Enable or disable the interleaver. BCC Interleaver interleaves the bits of each spatial stream(changes order of bits) to prevent long sequences of adjacent noisy bits from entering the BCC decoder. Interleaving is applied only when BCC encoding is used.

BCC Interleaver is fixed to be ‘OFF’ when the Capability is set to be Basic. It’s only visible when the Channel Coding Mode is BCC.

LDPC Tone Mapper

Choice: On|Off

Default: On

Enable or disable the LDPC Tone Mapper function. When it's Off, LDPC encoder will be bypassed.

LDPC Tone Mapper is fixed to be ‘OFF’ when the Capability is set to be Basic. It’s only visible when the Channel Coding Mode is LDPC.

Number of Spatial Streams (Nss,u)

Its maximum value depends on the Transmission Mode and STBC as below table show.

 

Max. Nss

STBC ON

2

STBC OFF

4

Set the number of Spatial Streams used by current user.

Number of Space Time Streams (Nsts,u)

Displays the number of Space Time Streams for the current user.

When STBC is OFF, it is equal to the Number of Spatial Streams. When STBC is ON, it is equal to two times the Number of Spatial Streams. Its initial value is equal to the Number of Transmit Chains so that the initial Spatial Mapping Scheme can be Direct Mapping.

MCS Index

Select the MCS Index. Please note that some MCS Index values are defined in the standard to to be invalid for certain combinations of bandwidth and number of spatial streams Nxx. They are not selectable.

Modulation

Displays the modulation format defined for the selected MCS (Modulation and Coding Scheme) Index value.

Coding Rate

Displays the coding rate determined by MCS index.

Data Rate

Displays the data rate determined by MCS index.

Aggregated MPDU

Choices: On|Off

Default: On

Enable or disable the MPDU aggregation. When it’s off, a single MPDU will be used as the payload.

Minimum MPDU Start Spacing

Choices: No restriction | ¼ us | ½ us | 1 us | 2 us | 4 us | 8 us | 16 us

Default: No restriction

Coupling: Invisible when Aggregated MPDU is set to OFF.

Select the minimum time between the start of adjacent MPDUs within an A-MPDU.

Minimum MPDU Start Spacing in octets

Default: 0

Coupling: Invisible when Aggregated MPDU is set to OFF.

Displays the minimum octets between the start of adjacent MPDUs. Its value should be equal or greater than Minimum MPDU Start Spacing X Data Rate / 8.

AMPDU Length

Displays the number of octets in the AMPDU pre-EOF padding carried in the PSDU of the current user. It's the LENGTH defined in the standard and is equal to the sum of A-MPDU Subframe Length in all the MPDUs.

MPDU#

Range: 0 to 63

Default: 0

Displays the MPDU index. When a new MPDU is added or deleted, the MPDU# will increment or decrement by 1.

MAC Header

Configure the MAC header.

Data Type

Choices: All 0s | PN9 | PN15 | User File

Default: PN9

Select the payload bits stream. This is the actual user data carried by a frame.

PN9 Seed

Specify a seed in decimal format which is used to generate PN9 data sequence. The LSB of seed will be coming out first. For example, if the seed is 10, the first 9 data of PN9 sequence are 0 1 0 1 0 0 0 0 0 with an increasing index from left to right.

Data Length

Set the number of data bytes in the payload. The value is limited by the MPDU Length.

MPDU Length

Displays the number of octets in current MPDU, which is comprised of MSDU, MAC Header and MAC FCS.

Prior to N7617B version 1.12.0.0, this was named MAC Frame Length.

A-MPDU Subframe Length

Default: 0

Coupling: Only available when Aggregated MPDU is turned on.

Displays the number of octets each A-MPDU subframe contains. A-MPDU is made up of a number of A-MPDU subframes.