9.1.9 Ciphering mode command

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

This message is sent on the main DCCH from the network to the mobile station to indicate that the network has started deciphering and that enciphering and deciphering shall be started in the mobile station, or to indicate that ciphering will not be performed. See table 9.1.9.1.

Message type: CIPHERING MODE COMMAND

Significance: dual

Direction: network to mobile station

Table 9.1.9.1: CIPHERING MODE COMMAND message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management
Protocol Discriminator

Protocol Discriminator
10.2

M

V

1/2

Skip Indicator

Skip Indicator
10.3.1

M

V

1/2

Cipher Mode Command
Message Type

Message Type
10.4

M

V

1

Ciphering Mode Setting

Cipher Mode Setting
10.5.2.9

M

V

1/2

Cipher Response

Cipher Response
10.5.2.10

M

V

1/2