# SNS Configuration

You can use a Readable Unit anywhere where you have the option of:

• number or string

• integer or string

📃 Corresponding configuration file: sns/sns_config.json

## SNS

Schema describing the JSON file structure for the sns configuration.

Properties

Type Description Required Boundaries Default
maximumTtl integer The threshold for the amount of hops for a transmission. This is an additional, hard threshold, which can’t be exceeded. No [0, +$\infty$] 10
singlehopRadius number Default radius in m to be used if an AdhocConfiguration doesn’t specify a radius. No None 509.4
adhocTransmissionModel adhocTransmissionModel Object to define an adhoc transmission model. No None None
singlehopDelay delay Object to define a delay model. No None constantDelay
singlehopTransmission transmission Object to define the properties of a transmission. ✓ Yes None None

Object to define an adhoc transmission model.

Properties

Type Description Required Boundaries Default
type string Type of the transmission model. The simple model assumes, that all receivers can be reached even though this might not be the case in reality. No Enum None
simpleMultihopDelay delay Object to define a delay model. No None constantDelay
simpleMultihopTransmission transmission Object to define the properties of a transmission. ✓ Yes None None

Further property restrictions:

• Allowed values:
• SimpleAdhocTransmissionModel
• SophisticatedAdhocTransmissionModel

## delay

Object to define a delay model.

Additionally ONE of the following property definitions apply:

Object to define a model for GammaRandomDelay or GammaSpeedDelay. GammaRandomDelay bases directly on the Gamma distribution (b=2,p=2) with minimum and expected value. Due to the nature of the Gamma distribution, the resulting delays can be far higher than the expected value. GammaSpeedDelay bases on the GammaRandomDelay and includes an additional speed penalty according to the current speed of the vehicle.

Properties

Type Description Required Boundaries Default
type string Type of Gamma delay. ✓ Yes Enum None
minDelay number
string
Minimum delay for the Gamma distribution. If defined as a number, then the default unit is ns. Alternatively this can be defined as a string to include the unit of measurement (e.g. ‘3 seconds’) ✓ Yes None None
expDelay number
string
Expected delay for the Gamma distribution. If defined as a number, then the default unit is ns. Alternatively this can be defined as a string to include the unit of measurement (e.g. ‘3 seconds’) ✓ Yes None None

Further property restrictions:

• Allowed values:
• GammaRandomDelay
• GammaSpeedDelay

## constantDelay

Object to define a model for constant delay, which delivers always the same delay.

Properties

Type Description Required Boundaries Default
type string Type of the constant delay ✓ Yes Enum None
delay number
string
The delay. If defined as a number, then the default unit is ns. Alternatively this can be defined as a string to include the unit of measurement (e.g. ‘3 seconds’) ✓ Yes None None

Further property restrictions:

### constantDelay.type

• Allowed values:
• ConstantDelay

## simpleRandomDelay

Object to define a model for a radnomised delay. Delivers number-of-steps different uniformly distributed delays in the interval defined by min and max (e.g. minDelay=30ms, maxDelay=60ms, steps=4 -> possible delays={30,40,50,60}ms.).

Properties

Type Description Required Boundaries Default
type string Type of the delay. ✓ Yes Enum None
steps integer Number of possible delays between min and max. ✓ Yes [0, +$\infty$] None
minDelay number
string
Minimum delay in nanoseconds for the Gamma distribution. If defined as a number, then the default unit is ns. Alternatively this can be defined as a string to include the unit of measurement (e.g. ‘3 seconds’) ✓ Yes None None
maxDelay number
string
Maximum delay in nanoseconds for the Gamma distribution. If defined as a number, then the default unit is ns. Alternatively this can be defined as a string to include the unit of measurement (e.g. ‘3 seconds’) ✓ Yes None None

Further property restrictions:

### simpleRandomDelay.type

• Allowed values:
• SimpleRandomDelay

## tranmission

Object to define the properties of a transmission.

Properties

Type Description Required Boundaries Default
lossProbability number Probability of packet retransmission (in case of configured retries > 0) or packet loss (retries = 0) for the packet retransmission/loss model. A value of 0 equals a lossfree transmission. ✓ Yes [0, 1] 0
maxRetries integer Maximum Number of retransmissions. No [0, +$\infty$] None