9.1.13 Frequency redefinition

3GPP44.018GSM/EDGE Radio Resource Control (RRC) protocolMobile radio interface Layer 3 specificationRelease 17TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

This message is sent on the main DCCH from the network to the MS to indicate that the frequencies and the hopping sequence of the allocated channels shall be changed. See table 9.1.13.1

Message type: FREQUENCY REDEFINITION

Significance: dual

Direction: network to MS

Table 9.1.13.1: FREQUENCY REDEFINITION message content

IEI	Information element	Type / Reference	Presence	Format	length
	RR management Protocol Discriminator	Protocol Discriminator 10.2	M	V	½
	Skip Indicator	Skip Indicator 10.3.1	M	V	½
	Frequency Redefinition Message Type	Message Type 10.4	M	V	1
	Channel Description	Channel Description 10.5.2.5	M	V	3
	Mobile Allocation	Mobile Allocation 10.5.2.21	M	LV	1-9
	Starting Time	Starting Time 10.5.2.38	M	V	2
62	Cell Channel Description	Cell Channel Description 10.5.2.1b	O	TV	17
9-	Carrier Indication	Carrier Indication 10.5.2.69	C	TV	1
11	Mobile Allocation C2	Mobile Allocation 10.5.2.21	C	TLV	2-10
12	Channel Description C2	Channel Description 3 10.5.2.5c	C	TV	3
6D	Extended TSC Set	Extended TSC Set 10.5.2.82	C	TV	2

9.1.13.1 Cell Channel Description

If it does not appear, the cell channel description is assumed to be unchanged.

9.1.13.2 Carrier Indication

This information element shall only be included if the mobile station is in dual transfer mode, has been assigned packet resources on two carriers, and the Frequency Redefinition message is applicable only to one carrier. The IE shall indicate which carrier the message applies to. In this case the frequency parameters applicable to the indicated carrier are provided in the Channel Description IE and the Mobile Allocation IE.

9.1.13.3 Mobile Allocation C2 and Channel Description C2

These information element shall be included if the Frequency Redefinition message is used to change the frequency parameters for both carriers being used by a downlink dual carrier capable mobile station in dual transfer mode (in this case the Carrier Indication IE is not present). The frequency parameters applicable to carrier 1 are provided in the Channel Description and the Mobile Allocation IEs, while the frequency parameters applicable to carrier 2 are provided in the Channel Description C2 and the Mobile Allocation C2 IEs.

Either the Carrier Indication IE, or the two Mobile Allocation C2 and Channel Description C2 IEs shall be present, not all three IEs.

9.1.13.4 Extended TSC Set

If the message is sent to a mobile station that indicates support for extended TSC sets (see 3GPP TS 24.008 [79]) this information element may be included to provide TSC related information for the assigned radio resources. In the absence of this information element the TSC related information provided by the Channel Description IE and Channel Description 3 IE shall apply.