9 Specified and default radio configurations

38.3313GPPNRProtocol specificationRadio Resource Control (RRC)Release 15TS

Specified and default configurations are configurations of which the details are specified in the standard. Specified configurations are fixed while default configurations can be modified using dedicated signalling. The default value for the parameters not listed in following subclauses shall be set such as the corresponding features are not configured, i.e. release or false unless explicitly stated otherwise.

NOTE: The UE applies the default values specified in the field description of ASN.1 parameters only when the parent IE is present. Hence, the UE does not apply all default values in field descriptions when it applies the "default radio configuration" in accordance with this clause.

9.1 Specified configurations

9.1.1 Logical channel configurations

9.1.1.1 BCCH configuration

Parameters

Name

Value

Semantics description

Ver

SDAP configuration

Not used

PDCP configuration

Not used

RLC configuration

TM

Logical channel configuration

Not used

NOTE: RRC will perform padding, if required due to the granularity of the TF signalling, as defined in 8.5.

9.1.1.2 CCCH configuration

Parameters

Name

Value

Semantics description

Ver

SDAP configuration

Not used

PDCP configuration

Not used

RLC configuration

TM

Logical channel configuration

>priority

1

Highest priority

>prioritisedBitRate

infinity

>bucketSizeDuration

ms1000

>logicalChannelGroup

0

9.1.1.3 PCCH configuration

Parameters

Name

Value

Semantics description

Ver

SDAP configuration

Not used

PDCP configuration

Not used

RLC configuration

TM

Logical channel configuration

Not used

NOTE: RRC will perform padding, if required due to the granularity of the TF signalling, as defined in 8.5.

9.1.2 Void

9.2 Default radio configurations

The following clauses only list default values for REL-15 parameters included in protocol version v15.3.0. For all fields introduced in a later protocol version, the default value is "released" or "false" unless explicitly specified otherwise. If the UE is to apply default configuration while it is configured with some critically extended fields, the UE shall apply the original version of those fields with only default values.

NOTE 1: In general, the signalling should preferably support a "release" option for fields introduced after v15.3.0. The "value not applicable" should be used restrictively, mainly limited to for fields which value is relevant only if another field is set to a value other than its default.

NOTE 2: For parameters in ServingCellConfig, the default values are specified in the corresponding specification.

9.2.1 Default SRB configurations

Parameters

Name

Value

Semantics description

Ver

SRB1

SRB2

SRB3

PDCP-Config

>t-Reordering

infinity

RLC-Config CHOICE

Am

ul-AM-RLC

>sn-FieldLength

>t-PollRetransmit

>pollPDU

>pollByte

>maxRetxThreshold

size12

ms45

infinity

infinity

t8

dl-AM-RLC

>sn-FieldLength

>t-Reassembly

>t-StatusProhibit

size12

ms35

ms0

logicalChannelIdentity

1

2

3

LogicalChannelConfig

>priority

1

3

1

>prioritisedBitRate

infinity

>logicalChannelGroup

0

9.2.2 Default MAC Cell Group configuration

Parameters

Name

Value

Semantics description

Ver

MAC Cell Group configuration

bsr-Config

>periodicBSR-Timer

sf10

>retxBSR-Timer

sf80

phr-Config

>phr-PeriodicTimer

sf10

>phr-ProhibitTimer

sf10

>phr-Tx-PowerFactorChange

dB1

9.2.3 Default values timers and constants

Parameters

Name

Value

Semantics description

Ver

t310

ms1000

n310

n1

t311

ms30000

n311

n1