9 Message functional definitions and contents

04.563GPPGSM Cordless Telephony System (CTS), (Phase 1) CTS Radio Interface Layer 3 SpecificationTS

This section defines the structure of the messages of those layer 3 protocols defined in GSM 04.56. These are standard L3 messages as defined in GSM 04.07 with the exception of those sent on the SCH, ARCH.

Each definition given in the present section includes:

a) a brief description of the message direction and use, including whether the message has:

1. Local significance, i.e. relevant only on the originating or terminating access;

2. Access significance, i.e. relevant in the originating and terminating access, but not in the CTS‑FP;

3. Dual significance, i.e. relevant in either the originating or terminating access and in the network; or

4. Global significance, i.e. relevant in the originating and terminating access and in the network.

b) a table listing the information elements known in the message and their order of their appearance in the message. All information elements that may be repeated are explicitly indicated. ( V and LV formatted IEs, which compose the imperative part of the message, occur before T, TV, and TLV formatted IEs which compose the non-imperative part of the message, cf. GSM 04.07.) In a (maximal) sequence of consecutive information elements with half octet length, the first information element with half octet length occupies bits 1 to 4 of octet N, the second bits 5 to 8 of octet N, the third bits 1 to 4 of octet N+1 etc. Such a sequence always has an even number of elements.

For each information element the table indicates:

1. the information element identifier, in hexadecimal notation, if the IE has format T, TV, or TLV. Usually, there is a default IEI for an information element type; default IEIs of different IE types of the same protocol are different. If the IEI has half octet length, it is specified by a notation representing the IEI as a hexadecimal digit followed by a "-" (example: B-).

NOTE: The same IEI may be used for different information element types in different messages of the same protocol.2. the name of the information element (which may give an idea of the semantics of the element). The name of the information element (usually written in italics) followed by "IE" or "information element" is used in GSM 04.08 as reference to the information element within a message.

3. the name of the type of the information element (which indicates the coding of the value part of the IE), and generally, the referenced subsection of section 10 of GSM 04.08 describing the value part of the information element.

4. the presence requirement indication (M, C, or O) for the IE as defined in GSM 04.07.

5. The format of the information element (T, V, TV, LV, TLV) as defined in GSM 04.07.

6. The length of the information element (or permissible range of lengths), in octets, in the message, where "?" means that the maximum length of the IE is only constrained by link layer protocol, and in the case of the Facility IE by possible further conditions specified in GSM 04.10. This indication is non-normative.

c) subsections specifying, where appropriate, conditions for IEs with presence requirement C or O in the relevant message which together with other conditions specified in GSM 04.08 define when the information elements shall be included or not, what non-presence of such IEs means, and – for IEs with presence requirement C – the static conditions for presence and/or non-presence of the IEs (cf. GSM 04.07).

9.1 Messages for Radio Resources management

Table 9.1/GSM 04.56 summarises the messages for Radio Resources management.

Table 9.1.1/GSM 04.56: Messages for Radio Resources management

Channel establishment messages:

Reference

CTS IMMEDIATE ASSIGNMENT

9.1.21

CTS IMMEDIATE ASSIGNMENT EXTENDED

9.1.22

CTS IMMEDIATE ASSIGNMENT REJECT

9.1.23

Ciphering messages:

Reference

CTS CIPHERING MODE COMMAND

9.1.14

CTS CIPHERING MODE COMPLETE

9.1.15

Channel release messages:

Reference

CTS CHANNEL RELEASE

9.1.13

Handover message:

Reference

CTS INTRACELL HANDOVER COMMAND

9.1.24

CTS INTRACELL HANDOVER COMPLETE

9.1.25

CTS INTRACELL HANDOVER FAILURE

9.1.26

Paging messages:

Reference

CTS GROUP ALERTING REQUEST

9.1.19

CTS PAGING REQUEST

9.1.31

CTS PAGING RESPONSE

9.1.32

CTS HUNTING REQUEST

9.1.20

Alive check messages:

Reference

Miscellaneous messages:

Reference

CTS ACCESS REQUEST

9.1.1

CTS CHANNEL MODE MODIFY

9.1.11

CTS CHANNEL MODE MODIFY ACKNOWLEGDE

9.1.12

CTS CLASSMARK CHANGE

9.1.16

CTS CLASSMARK ENQUIRY

9.1.17

CTS FREQUENCY HOPPING DEFINITION

9.1.18

CTS MEASUREMENT REPORT

9.1.27

CTS RR STATUS

System messages:

Reference

CTS SYSTEM INFORMATION TYPE 1

9.1.33

CTS SYSTEM INFORMATION TYPE 2

9.1.34

CTS SYSTEM INFORMATION TYPE 3

9.1.35

9.1.1 CTS access request

This message is sent in random mode on the ARCH. It does not follow the basic format. The possible formats are presented directly below, without reference to information fields. The order of bit transmission is defined in GSM 04.04.

The message is only 25 bits long, coded as shown in figure 9.1.1/GSM 04.56.

25 1

+————————————————-+

CAUSE CTSMSI 

+————————————————-+

Figure 9.1.1/GSM 04.56: CTS ACCESS REQUEST message content

CAUSE (octet 1)

This information field indicates the reason for requesting the access to a CTS‑FP. This field has a fixed length (3 bits).

CTSMSI

This information field contains the individual Mobile Subscriber Identity. See GSM 03.03.

Table 9.1.2/GSM 04.56: CTS ACCESS REQUEST cause

3bits Code

Cause

000

Alive Check Response

001

MM procedures (Attachment, Re-attachment or detachment)

010

Reserved for future use

011

MS-originated call

100

Answer to paging

101

Enrolment

110

Reserved for future use

111

Reserved for future use

NOTE: Reserved for future use values shall not be used by the mobile station on ARCH. If such message is received by the CTS‑FP, it may be ignored.

9.1.2 CTS AFA monitoring command

This message is sent on the main DCCH by the CTS‑FP to the CTS‑MS to instruct the CTS‑MS to perform as soon as possible AFA interference measurements.

Message type: CTS AFA MONITORING COMMAND

Significance: dual

Direction: CTS‑FP to CTS‑MS

Table 9.1.3/GSM 04.56: CTS AFA MONITORING COMMAND message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS AFA Monitoring

Message Type

M

V

1

Command Message Type

10.4

AFA Monitoring Frequency List

Frequency list

M

LV

GSM 04.08 10.5.2.13

NAMC

AFA Monitoring Cycles

M

V

2

9.1.3 CTS AFA monitoring enquiry

This message is sent on the main DCCH by the CTS‑FP to the CTS‑MS to request for AFA monitoring results report.

Message type: CTS AFA MONITORING ENQUIRY

Significance: dual

Direction: CTS‑FP to CTS‑MS

Table 9.1.4/GSM 04.56: CTS AFA MONITORING ENQUIRY message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS AFA Monitoring

Message Type

M

V

1

Enquiry Message Type

10.4

9.1.4 CTS AFA monitoring report

This message is sent on the main DCCH by the CTS‑MS to the CTS‑FP to report AFA monitoring results.

Message type: CTS AFA MONITORING REPORT

Significance: dual

Direction: CTS‑MS to CTS‑FP

Table 9.1.5/GSM 04.56: CTS AFA MONITORING REPORT message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS AFA Monitoring

Message Type

M

V

1

Report Message Type

10.4

AFA Interference Level

AFA Interference Level

M

LV

NAMC real

AFA Monitoring Cycles

M

V

2

9.1.5 CTS BCCH detection command

This message is sent on the main DCCH by the CTS‑FP to the CTS‑MS to instruct the CTS‑MS to perform as soon as possible the BCCH detection procedure.

Message type: CTS BCCH DETECTION COMMAND

Significance: dual

Direction: CTS‑FP to CTS‑MS

Table 9.1.7/GSM 04.56: CTS BCCH DETECTION COMMAND message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS BCCH Detection

Message Type

M

V

1

Command Message Type

10.4

BCCH Detection

Frequency list

M

LV

Frequency List

GSM 04.08 10.5.2.13

9.1.6 CTS BCCH detection enquiry

This message is sent on the main DCCH by the CTS‑FP to the CTS‑MS to request for a BCCH detection report.

Message type: CTS BCCH DETECTION ENQUIRY

Significance: dual

Direction: CTS‑FP to CTS‑MS

Table 9.1.8/GSM 04.56: CTS BCCH DETECTION ENQUIRY message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS BCCH Detection

Message Type

M

V

1

Enquiry Message Type

10.4

9.1.7 CTS BCCH detection report

This message is sent on the main DCCH by the CTS‑MS to the CTS‑FP to report the table of BCCH detection status.

Message type: CTS BCCH DETECTION REPORT

Significance: dual

Direction: CTS‑MS to CTS‑FP

Table 9.1.9/GSM 04.56: CTS BCCH DETECTION REPORT message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS BCCH Detection

Message Type

M

V

1

Report Message Type

10.4

BCCH Detection Status

BCCH Detection Status

M

LV

9.1.8 CTS beacon channel synchronisation burst information

This message is sent on the CTSBCH‑SB. Its purpose is to. It does not follow the basic format. Its length is 25 bits.

Message type: BEACON CHANNEL SYNCHRONISATION BURST

Significance: dual

Direction: CTS‑FP to CTS‑MSs

8 7 6 5 4 3 2 1

+———————————————–+

Sta- PCH Shift  FPBI  octet 1

 tus ind. ind.  TNC  (high) 

+———————————————–

 FPBI  octet 2

 (middle part) 

+———————————————–

 FPBI  octet 3

 (middle part) 

+———————————————–

FPBI 

(low)

+—–+

Figure 9.1.2/GSM 04.56 Beacon Channel synchronisation burst information element

Table 9.1.10/GSM 04.56: Beacon Channel synchronisation burst information element

Status (octet 1 bit 8)
Bits
8
0 Idle
1 Busy

PCH indicator (octet 1 bit 7)
Bits
7
0 No CTSPCH to decode
1 CTSPCH to decode

Shifting indicator (octet 1 bit 6)
Bits
6
0 Shifting
1 No shifting

TNC (octet 1 bit 5 to 3)
Bits
5 4 3
X X X CTS control channel timeslot number
FPBI

9.1.9 CTS channel mode modify

This message is sent on the main DCCH from the CTS‑FP to the CTS‑MS to request the setting of the mode for the indicated channel. See table 9.6/GSM 04.08.

Message type: CTS CHANNEL MODE MODIFY

Significance: local

Direction: CTS‑FP to CTS‑MS

9.1.10 CTS channel mode modify acknowledge

This message is sent on the main DCCH from the CTS‑MS to the CTS‑FP to indicate the successful or unsuccessful execution of a channel mode modify request. See table 9.7/GSM 04.08.

Message type: CTS CHANNEL MODE MODIFY ACKNOWLEDGE

Significance: local

Direction: CTS‑FP to CTS‑MS

9.1.11 CTS channel release

This message is sent on the main DCCH from the CTS‑FP to the CTS‑MS to initiate deactivation of the dedicated channel. See table 9.1.11/GSM 04.56.

Message type: CTS CHANNEL RELEASE

Significance: dual

Direction: CTS‑FP to CTS‑MS

Table 9.1.11/GSM 04.56: CTS CHANNEL RELEASE message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS Channel Release

Message Type

M

V

1

Message Type

10.4

RR Cause

RR Cause

M

V

1

GSM 04.08 10.5.2.31

9.1.12 CTS ciphering mode command

This message is sent on the main DCCH from the CTS‑FP to the CTS‑MS to indicate that the CTS‑FP 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 9.1.12/GSM 04.56.

Message type: CTS CIPHERING MODE COMMAND

Significance: dual

Direction: CTS‑FP to CST‑MS

Table 9.1.12/GSM 04.56: CTS CIPHERING MODE COMMAND message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS Cipher Mode Command

Message Type

M

V

1

Message Type

10.4

Ciphering Mode Setting

Cipher Mode Setting

M

V

1/2

GSM 04.08 10.5.2.9

Cipher Response

Cipher Response

M

V

1/2

GSM 04.08 10.5.2.10

9.1.13 CTS ciphering mode complete

This message is sent on the main DCCH from the CTS‑MS to the CTS‑FP to indicate that enciphering and deciphering has been started in the MS. See table 9.1.13/GSM 04.56

Message type: CTS CIPHERING MODE COMPLETE

Significance: dual

Direction: CTS‑MS to CTS‑FP

Table 9.1.13/GSM 04.56: CTS CIPHERING MODE COMPLETE message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS Cipher Mode Complete

Message Type

M

V

1

Message Type

10.4

17

Mobile Equipment

Mobile Identity

O

TLV

3-11

Identity

9.1.14 CTS classmark change

This message is sent on the main DCCH by the CTS‑MS to the CTS‑FP to indicate a classmark change or a response to a classmark enquiry. See table 9.12/GSM 04.08.

Message type: CTS CLASSMARK CHANGE

Significance: dual

Direction: CTS‑MS to CTS‑FP

9.1.15 CTS classmark enquiry

This message is sent on the main DCCH by the CTS‑FP to the CTS‑MS to request classmark information. See table 9.12a/GSM 04.08.

Message type: CTS CLASSMARK ENQUIRY

Significance: dual

Direction: CTS‑FP to CTS‑MS

9.1.16 CTS frequency hopping definition

This message is sent on the main DCCH by the CTS‑FP to the CTS‑MS to indicate the frequency list and the frequency hopping parameters to be used. See table 9.1.14/GSM 04.56.

Message type: CTS FREQUENCY HOPPING REDEFINITION

Significance: dual

Direction: CTS‑FP to CTS‑MS

Table 9.1.14/GSM 04.56: CTS FREQUENCY HOPPING DEFINITION message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS Frequency definition

Message Type

M

V

1

Message Type

10.4

Reference Time

Starting Time

M

V

3

GSM 04.08

TFH Current Parameters

TFH Current Parameters

M

V

8-n

TFH General Parameter

TFH General Parameters

O

V

10

TFH List

Frequency list

O

V

3-n

GSM 04.08 10.5.2.13

9.1.16.1 Reference time

The reference time information element indicates the time when the values given by the TFH current parameters IE are relevant.

9.1.17 CTS group alerting request

This message is sent on the CTSPCH by the CTS‑FP to the mobile stations in order to initiate a connectionless group alerting procedure. The mobile stations are identified by their connectionless group CTSMSI. See table 9.1.15/GSM 04.56.

Message type: CTS GROUP ALERTING REQUEST

Significance: dual

Direction: CTS‑FP to CTS‑MS

Table 9.1.15/GSM 04.56: CTS GROUP ALERTING REQUEST message content

IEI

Information element

Type / Reference

Presence

Format

length

L2 Pseudo Length

L2 Pseudo Length

M

V

1

10.5.2.19

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS Group Alerting Request

Message Type

M

V

1

Message Type

10.4

Connectionless Group

CTSMSI

M

LV

CTS Mobile Subscriber Identity

10.5.2.x

Information Transfer Capability

Information Transfer Capability

M

V

1/2

Spare Half Octet

Spare Half Octet

M

V

1/2

GSM 04.08 10.5.1.8

Calling Party BCD Number

Calling Party BCD Number

M

LV

GSM 04.08 10.5.4.9

Rest Octets

Rest Octets

M

V

10.5.2.23

9.1.17.1 Rest Octets

The sum of the length of this IE and the L2 Pseudo Length of the message equals 22.

9.1.18 CTS hunting request

This message is sent on the CTSPCH by the CTS‑FP to mobile stations to make a group of mobile station alert for location purpose. The mobile station are identified by their Connectionless Group CTSMSI See table 9.16/GSM 04.56.

Message type: CTS HUNTING REQUEST

Significance: dual

Direction: CTS‑FP to CTS‑MS

Table 9.1.16/GSM 04.56: CTS HUNTING REQUEST message content

IEI

Information element

Type / Reference

Presence

Format

length

L2 Pseudo Length

L2 Pseudo Length

M

V

1

10.5.2.19

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS Hunting Request

Message Type

M

V

1

Message Type

10.4

Connectionless Group

CTSMSI

M

V

3

CTS Mobile Subscriber Identity

10.5.2.x

Rest Octets

Rest Octets

M

V

17

10.5.2.23

9.1.18.1 Rest Octets

The sum of the length of this IE and the L2 Pseudo Length of the message equals 22.

9.1.19 CTS immediate assignment

This message is sent on the CTSAGCH by the CTS‑FP to the CTS‑MS in idle mode to change the channel configuration to a dedicated configuration. See table 9.1.17/GSM 04.56.

Message type: CTS IMMEDIATE ASSIGNMENT

Significance: dual

Direction: CTS‑FP to CTS‑MS

Table 9.1.17/GSM 04.56: CTS IMMEDIATE ASSIGNMENT message content

IEI

Information element

Type / Reference

Presence

Format

length

CTS L1 information

CTS L1 information

M

V

3

L2 Pseudo Length

L2 Pseudo Length

M

V

1

GSM 0408 10.5.2.19

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS Immediate Assignment

Message Type

M

V

1

Message Type

10.4

Channel Description

CTS Channel Description

M

V

3

Access Request

CTS Access Request Reference

M

V

4

Reference

Rest Octets

Rest Octets

M

V

10

9.1.20 CTS immediate assignment extended

This message is sent on the hopping CTSAGCH by the CTS‑FP to two CTS‑MSs in idle mode to change their channel configurations to a dedicated configurations. See table 9.1.18/GSM 04.56.

This message has a L2 Pseudo Length of 16.

Message type: CTS IMMEDIATE ASSIGNMENT EXTENDED

Significance: dual

Direction: CTS‑FP to CTS‑MSs

Table 9.1.18/GSM 04.56: CTS IMMEDIATE ASSIGNMENT EXTENDED message content

IEI

Information element

Type / Reference

Presence

Format

length

CTS L1 Information

CTS L1 Information

M

V

3

L2 Pseudo Length

L2 Pseudo Length

M

V

1

GSM 0408 10.5.2.19

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS Immediate Assignment

Message Type

M

V

1

Message Type

10.4

Channel Description 1

CTS Channel Description

M

V

3

Access Request

CTS Access Request Reference

M

V

4

Reference 1

Channel Description 2

CTS Channel Description

M

V

3

Access Request

CTS Access Request Reference

M

V

4

Reference 2

Rest Octets

Rest Octets

M

V

3

9.1.21 CTS immediate assignment reject

This message is sent on the CTSAGCH by the CTS‑FP to up to three CTS‑MSs to indicate that no channel is available for assignment. See table 9.1.19/GSM 04.56.

This message has a L2 Pseudo Length of 22.

Message type: CTS IMMEDIATE ASSIGNMENT REJECT

Significance: dual

Direction: CTS‑FP to CTS‑MSs

Table 9.1.19/GSM 04.56: CTS IMMEDIATE ASSIGNMENT REJECT message content

IEI

Information element

Type / Reference

Presence

Format

length

CTS L1 information

CTS L1 information

M

V

3

L2 Pseudo Length

L2 Pseudo Length

M

V

1

GSM 0408 10.5.2.19

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS Immediate Assignment

Message Type

M

V

1

Message Type

10.4

Access Request

CTS Access Request Reference

M

V

4

Reference 1

Wait Indication 1

Wait Indication

M

V

1

GSM 04.08 10.5.2.43

Access Request

CTS Access Request Reference

M

V

4

Reference 2

Wait Indication 2

Wait Indication

M

V

1

GSM 04.08 10.5.2.43

Access Request

CTS Access Request Reference

M

V

4

Reference 3

Wait Indication 3

Wait Indication

M

V

1

GSM 04.08 10.5.2.43

Rest Octets

Rest octets

M

V

2

9.1.21.1 Use of Indexes

An Access Request information element and the following Wait Indication information element refer to the same CTS‑MS.

9.1.21.2 Filling of the message

If necessary, the Access Request Reference information element and the wait indication information element should be duplicated to fill the message

9.1.22 CTS intracell handover command

This message is sent on the main DCCH by the CTS‑FP to the CTS‑MS to change the dedicated channel configuration

Message type: CTS INTRACELL HANDOVER COMMAND

Significance: dual

Direction: CTS‑FP to CTS‑MS

Table 9.1.20/GSM 04.56: CTS INTRACELL HANDOVER COMMAND message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS Immediate Assignment

Message Type

M

V

1

Message Type

10.4

Channel Description

CTS Channel Description

M

V

3

Starting Time

Starting Time

M

V

3

GSM 04.08 10.5.2.38

Channel Mode

Channel Mod

O

V

2

GSM 04.08 10.5.2.6

9.1.23 CTS intracell handover complete

This message is sent on the main DCCH by the CTS‑MS to the CTS‑FP to indicate that the CTS-MS has established the main signalling link.

Message type: CTS INTRACELL HANDOVER COMPLETE

Significance: dual

Direction: CTS‑FP to CTS‑MS

Table 9.1.21/GSM 04.56: CTS INTRACELL HANDOVER COMPLETE message content

IEI

Information element

Type / Référence

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS Immediate Assignment

Message Type

M

V

1

Message Type

10.4

RR Cause

RR Cause

M

V

2

GSM 04.08 10.5.2.31

9.1.24 CTS intracell handover failure

This message is sent on the main DCCH by the CTS‑MS to the CTS‑FP to indicate that the CTS-MS has failed to seize the new channel.

Message type: CTS INTRACELL HANDOVER COMMAND

Significance: dual

Direction: CTS‑FP to CTS‑MS

Table 9.1.22/GSM 04.56: CTS INTRACELL HANDOVER COMMAND message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS Immediate Assignment

Message Type

M

V

1

Message Type

10.4

Channel Description

CTS Channel Description

M

V

3

Starting Time

Starting Time

M

V

2

GSM 04.08 10.5.2.38

9.1.25 CTS measurement report

This message is sent on the SACCH by the CTS‑MS to the CTS‑FP to report measurement results about the dedicated channel. See table 9.1.23/GSM 04.56.

Message type: CTS MEASUREMENT REPORT

Significance: dual

Direction: CTS‑MS to CTS‑FP

Table 9.1.23/GSM 04.56: CTS SYSTEM INFORMATION TYPE 1 message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS Measurement Report

Message Type

M

V

1

Message Type

10.4

Measurement Results

Measurement Results

M

V

16

GSM 04.08 10.5.2.20

9.1.25.1 Measurement results

For CTS purpose, the NO‑NCELL‑M field (number of neighbouring cell measurements) shall be set to No neighbour cell measurement result (000) in the Measurement Result IEI and therefore, RXLEV‑NCELLi, BS‑FREQ‑NCELLi and BSISC‑NCELLi field (1 <= i <= 6) shall be coded with a "0" in each bit.

9.1.26 CTS OFO measurement command

This message is sent on the main DCCH by the CTS‑FP to the CTS‑MS to instruct the CTS‑MS to perform as soon as possible OFO measurements.

Message type: CTS OFO MEASUREMENT COMMAND

Significance: dual

Direction: CTS‑FP to CTS‑MS

Table 9.1.24/GSM 04.56: CTS OFO MEASUREMENT COMMAND message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS OFO Measurement

Message Type

M

V

1

Command Message Type

10.4

OFO Measurement BCCH

Frequency list

M

LV

Frequency List

GSM 04.08 10.5.2.13

9.1.27 CTS OFO measurement enquiry

This message is sent on the main DCCH by the CTS‑FP to the CTS‑MS to request for OFO measurement results report.

Message type: CTS OFO MEASUREMENT ENQUIRY

Significance: dual

Direction: CTS‑FP to CTS‑MS

Table 9.1.25/GSM 04.56: CTS OFO MEASUREMENT ENQUIRY message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS OFO Measurement

Message Type

M

V

1

Enquiry Message Type

10.4

9.1.28 CTS OFO Measurement report

This message is sent on the main DCCH by the CTS‑MS to the CTS‑FP to report AFA monitoring results.

Message type: CTS OFO MEASUREMENT REPORT

Significance: dual

Direction: CTS‑MS to CTS‑FP

Table 9.1.26/GSM 04.56: CTS OFO MEASUREMENT REPORT message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS OFO Measurement

Message Type

M

V

1

Report Message Type

10.4

OFO Measurement Results

OFO Measurement Result

M

LV

9.1.29 CTS paging request

This message is sent on the CTSPCH by the CTS‑FP to CTS‑MSs. It may be sent to a CTS‑MS in idle mode to trigger channel access. The CTS‑MS are identified by their CTSMSIs. See table 9.x/GSM 04.56.

This message has a L2 Pseudo Length of 19.

Message type: CTS PAGING REQUEST

Significance: dual

Direction: CTS‑FP to CTS‑MS

Table 9.1.27/GSM 04.56: CTS PAGING REQUEST message content

IEI

Information element

Type / Reference

Presence

Format

length

L2 Pseudo Length

L2 Pseudo Length

M

V

1

10.5.2.19

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS Paging Request

Message Type

M

V

1

Message Type

10.4

Mobile Identity 1

CTSMSI

M

V

3

10.5.2.1

Mobile Identity 2

CTSMSI

M

V

3

10.5.2.1

Mobile Identity 3

CTSMSI

M

V

3

10.5.2.1

Mobile Identity 4

CTSMSI

M

V

3

10.5.2.1

Paging type 1

Paging type

M

V

1

10.5.2.12

Paging type 2

Paging type

M

V

1

10.5.2.12

Paging type 3

Paging type

M

V

1

10.5.2.12

Paging type 4

Paging type

M

V

1

10.5.2.12

Rest Octets

M

V

4

9.1.29.1 Paging type

The Paging type x Information Element is related to the Mobile Identity x Information Element.

9.1.30 CTS paging response

This message is sent on the main DCCH by the CTS‑MS to the CTS‑FP in connection with establishment of the main signalling link as a response to the paging request message. See table 9.1.28/GSM 04.56.

Message type: CTS PAGING RESPONSE

Significance: dual

Direction: CTS‑MS to CTS‑FP

Table 9.1.28/GSM 04.56: CTS PAGING RESPONSE message content

IEI

Information element

Type / Reference

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS Paging Response

Message Type

M

V

1

Message Type

10.4

Ciphering Key Sequence

Ciphering Key Sequence

M

V

1/2

Number

Number

GSM 04.08 10.5.1.2

Spare Half Octet

Spare Half Octet

M

V

1/2

10.5.1.8

Mobile Station

Mobile Station

M

LV

4

Classmark

Classmark 2

GSM 0408 10.5.1.6

Mobile Identity

Mobile Identity

M

LV

2-9

GSM 04.08 10.5.1.4

9.1.30.1 Ciphering Key Sequence

For CTS purpose, the key sequence value shall be set to No key is available (1 1 1) value in the Ciphering key Sequence IEI by the CTS‑MS.

9.1.31 CTS system information type 1

This message is sent on the CTSPCH by the CTS‑FP to all the CTS‑MSs within the cell giving information about the TFH List to be used. See table 9.1.29/GSM 04.56.

Message type: CTS SYSTEM INFORMATION TYPE 1

Significance: dual

Direction: CTS‑FP to CTS‑MSs

Table 9.1.29/GSM 04.56: CTS SYSTEM INFORMATION TYPE 1 message content

IEI

Information element

Type / Reference

Presence

Format

length

L2 Pseudo Length

L2 Pseudo Length

M

V

1

10.5.2.19

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS System Info. Type 1

Message Type

M

V

1

Message Type

10.4

Starting Time

Starting Time

M

V

2

GSM 04.08 10.5.2.38

TFH List

Frequency List

M

LV

Rest Octet

M

9.1.31.1 Starting Time

The starting time information element indicates when the new TFH list apply.

9.1.32 CTS system information type 2

This message is sent on the CTSPCH by the CTS‑FP to all the CTS‑MSs within the cell giving information about the hopping parameters to be used. See table 9.1.30/GSM 04.56.

Message type: CTS SYSTEM INFORMATION TYPE 2

Significance: dual

Direction: CTS‑FP to CTS‑MSs

Table 9.1.30/GSM 04.56: CTS SYSTEM INFORMATION TYPE 2 message content

IEI

Information element

Type / Référence

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS System Info. Type 2

Message Type

M

V

1

Message Type

10.4

Starting Time

Starting Time

M

V

2

GSM 04.08 10.5.2.38

TFH New Current Parameters

TFH Current parameters

M

LV

Rest Octet

M

9.1.33 CTS system information type 3

This message is sent on the CTSPCH by the CTS‑FP to all the CTS‑MSs in order to invalidate the hopping parameters used by the CTS‑MSs and to detach all the CTS‑MSs. See table 9.1.31/GSM 04.56.

Message type: CTS SYSTEM INFORMATION TYPE 3

Significance: dual

Direction: CTS‑FP to CTS‑MSs

Table 9.1.31/GSM 04.56: CTS SYSTEM INFORMATION TYPE 3 message content

IEI

Information element

Type / Référence

Presence

Format

length

RR management

Protocol Discriminator

M

V

1/2

Protocol Discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

1/2

10.3.1

CTS System Info. Type 2

Message Type

M

V

1

Message Type

10.4

Starting Time

Starting Time

M

V

2

GSM 04.08 10.5.2.38

Rest Octet

M

9.1.34 CTS RR parameters update

This message is sent by the fixed part to the mobile station to provide RR parameters. See table 9.1.32/GSM 04.56

Message type: CTS RR PARAMETERS UPDATE

Significance: dual

Direction: fixed part to mobile station

Table 9.1.32/GSM 04.56: CTS RR PARAMETERS UPDATE message content

IEI

Information element

Type / Reference

Presence

Format

Length

RR management

Protocol discriminator

M

V

½

Protocol discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

½

10.3.1

CTS RR parameters update

Message type

M

V

1

Message type

10.4

74

CTS selection parameters

CTS selection parameters

O

TV

3

10.5.3.12

75

CTS RR parameters

CTS RR parameters

O

TV

5

10.5.3.13

76

Timeslot shifting parameters

Timeslot shifting parameters

O

TV

4

10.5.3.14

9.2 Messages for mobility management

Table 9.2.1/GSM 04.56 summarises the messages for mobility management.

Table 9.2.1/GSM 04.56: Messages for mobility management

Attach/detach messages:

Reference

CTS ATTACH REQUEST

9.2.1

CTS ATTACH ACCEPT

9.2.2

CTS ATTACH REJECT

9.2.3

CTS DETACH INDICATION

9.2.4

Enrolment messages:

Reference

CTS ENROLMENT REQUEST

9.2.7

CTS ENROLMENT ACCEPT

9.2.8

CTS ENROLMENT REJECT

9.2.9

CTS DE-ENROLMENT INDICATION

9.2.10

Authentication messages:

Reference

CTS MS AUTHENTICATION REQUEST

9.2.11

CTS MS AUTHENTICATION RESPONSE

9.2.12

CTS FP AUTHENTICATION RESPONSE

9.2.13

CTS MS AUTHENTICATION REJECT

9.2.14

Identity messages:

Reference

CTSMSI UPDATE COMMAND

9.2.15

CTSMSI UPDATE COMPLETE

9.2.16

9.2.1 CTS attach request

This message is sent by the mobile station to the fixed part to indicate to request attachment on this fixed part. See table 9.2.2/GSM 04.56.

Message type: CTS ATTACH REQUEST

Significance: dual

Direction: mobile station to fixed part

Table 9.2.2/GSM 04.56: CTS ATTACH REQUEST message content

IEI

Information element

Type / Reference

Presence

Format

Length

CTS mobility management

Protocol discriminator

M

V

½

Protocol discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

½

10.3.1

CTS attach request

Message type

M

V

1

Message type

10.4

CTS Ciphering Key Sequence

Ciphering Key Sequence

M

V

1/2

Number

Number

GSM 04.08 10.5.1.2

Attach type

Attach type

M

V

½

10.5.3.11

Mobile Station

Mobile Station

M

V

1

Classmark

Classmark 1

GSM 04.08 10.5.1.5

Mobile identity

Mobile identity

M

LV

2-9

10.5.1.1

9.2.2 CTS attach accept

This message is sent by the fixed part to the mobile station to indicate that the requested attachment has been accepted. See table 9.2.3/GSM 04.56

Message type: CTS ATTACH ACCEPT

Significance: dual

Direction: fixed part to mobile station

Table 9.2.3/GSM 04.56: CTS ATTACH ACCEPT message content

IEI

Information element

Type / Reference

Presence

Format

Length

CTS mobility management

Protocol discriminator

M

V

½

protocol discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

½

10.3.1

CTS attach accept

Message type

M

V

1

message type

10.4

TC3252

TC3252

M

V

1

10.5.3.10

01

CTS mobile group list

CTS mobile group list

O

TLV

5-26

10.5.3.7

02

Access right identity

Access right identity

O

TV

4

10.5.3.9

A1

Follow on proceed

Follow on proceed

O

T

1

GSM 04.08 10.5.3.7

9.2.3 CTS attach reject

This message is sent by the fixed part to the mobile station to indicate that the requested attachment has been rejected. See table 9.2.4/GSM 04.56.

Message type: CTS ATTACH REJECT

Significance: dual

Direction: fixed part to mobile station

Table 9.2.4/GSM 04.56: CTS ATTACH REJECT message content

IEI

Information element

Type / Reference

Presence

Format

Length

CTS mobility management

Protocol discriminator

M

V

½

protocol discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

½

10.3.1

CTS attach reject

Message type

M

V

1

message type

10.4

Fixed part identity

Fixed part identity

M

LV

2-10

10.5.3.6

Reject cause

Reject cause

M

V

1

GSM 04.08 10.5.3.6

9.2.4 CTS detachment indication

This message is sent by the mobile station to the fixed part to indicate the detachment of this fixed part. See table 9.2.5/GSM 04.56.

Message type: CTS DETACH INDICATION

Significance: dual

Direction: mobile station to fixed part

Table 9.2.5/GSM 04.56: CTS DETACH INDICATION message content

IEI

Information element

Type / Reference

Presence

Format

Length

CTS mobility management

Protocol discriminator

M

V

½

protocol discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

½

10.3.1

CTS detach indication

Message type

M

V

1

message type

10.4

Mobile Station

Mobile Station

M

V

1

Classmark

Classmark 1

GSM 04.08 10.5.1.5

Mobile identity

Mobile identity

M

LV

2-9

10.5.1.1

9.2.5 CTS enrolment request

This message is sent by the mobile station to the fixed part to indicate to request enrolment on this fixed part. See table 9.2.8/GSM 04.56.

Message type: CTS ENROLMENT REQUEST

Significance: dual

Direction: mobile station to fixed part

Table 9.2.8/GSM 04.56: CTS ENROLMENT REQUEST message content

IEI

Information element

Type / Reference

Presence

Format

Length

CTS mobility management

Protocol discriminator

M

V

½

protocol discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

½

10.3.1

CTS enrolment request

Message type

M

V

1

message type

10.4

Mobile Station

Mobile Station

M

V

1

Classmark

Classmark 1

GSM 04.08 10.5.1.5

Mobile identity

Mobile identity

M

LV

2-9

10.5.1.1

A2

Following attach request

Following attach request

O

T

1

10.5.3.8

9.2.6 CTS enrolment accept

This message is sent by the fixed part to the mobile station to indicate that the requested enrolment has been accepted. See table 9.2.9/GSM 04.56

Message type: CTS ENROLMENT ACCEPT

Significance: dual

Direction: fixed part to mobile station

Table 9.2.9/GSM 04.56: CTS ENROLMENT ACCEPT message content

IEI

Information element

Type / Reference

Presence

Format

Length

CTS mobility management

Protocol discriminator

M

V

½

protocol discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

½

10.3.1

CTS enrolment accept

Message type

M

V

1

message type

10.4

Fixed part identity

Fixed part identity

M

LV

2-10

10.5.3.6

Mobile identity

Mobile identity

M

LV

2-9

10.5.1.1

9.2.7 CTS enrolment reject

This message is sent by the fixed part to the mobile station to indicate that the requested enrolment has been rejected. See table 9.2.10/GSM 04.56.

Message type: CTS ENROLMENT REJECT

Significance: dual

Direction: fixed part to mobile station

Table 9.2.10/GSM 04.56: CTS ENROLMENT REJECT message content

IEI

Information element

Type / Reference

Presence

Format

Length

CTS mobility management

Protocol discriminator

M

V

½

protocol discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

½

10.3.1

CTS enrolment reject

Message type

M

V

1

message type

10.4

Fixed part identity

Fixed part identity

M

LV

2-10

10.5.3.6

Reject cause

Reject cause

M

V

1

GSM 04.08 10.5.3.6

9.2.8 CTS de-enrolment indication

This message is sent by the fixed part to the mobile station to indicate that the mobile station is no more enrolled on this fixed part. See table 9.2.11/GSM 04.56.

Message type: CTS DE-ENROLMENT INDICATION

Significance: dual

Direction: fixed part to mobile station

Table 9.2.11/GSM 04.56: CTS DE-ENROLMENT INDICATION message content

IEI

Information element

Type / Reference

Presence

Format

Length

CTS mobility management

Protocol discriminator

M

V

½

protocol discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

½

10.3.1

CTS de-enrolment indication

Message type

M

V

1

message type

10.4

Fixed part identity

Fixed part identity

M

LV

2-10

10.5.3.6

Reject cause

Reject cause

M

V

1

GSM 04.08 10.5.3.6

9.2.9 CTS MS authentication request

This message is sent by the fixed part to request authentication of the mobile station. See table 9.2.12/GSM 04.56.

Message type: CTS MS AUTHENTICATION REQUEST

Significance: dual

Direction: fixed part to mobile station

Table 9.2.12/GSM 04.56: CTS MS AUTHENTICATION REQUEST message content

IEI

Information element

Type / Reference

Presence

Format

Length

CTS mobility management

Protocol discriminator

M

V

½

protocol discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

½

10.3.1

CTS MS authentication request

Message type

M

V

1

message type

10.4

Ciphering key sequence

Ciphering key sequence

M

V

½

number

number

GSM 04.08 10.5.1.2

Spare half octet

Spare half octet

M

V

½

GSM 04.08 10.5.1.8

Authentication

Auth. parameter CH

M

V

16

parameter CH1

10.5.3.3

03

Authentication

Auth. parameter RIMS

O

TV

9

parameter RIMS

10.5.3.1

9.2.10 CTS MS authentication response

This message is sent by the mobile station to the fixed part to deliver a calculated response to the fixed part and to request authentication of the fixed part. See table 9.2.13/GSM 04.56.

Message type: CTS MS AUTHENTICATION RESPONSE

Significance: dual

Direction: mobile station to fixed part

Table 9.2.13/GSM 04.56: CTS MS AUTHENTICATION RESPONSE message content

IEI

Information element

Type / Reference

Presence

Format

Length

CTS mobility management

Protocol discriminator

M

V

½

Protocol discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

½

10.3.1

CTS MS authentication

Message type

M

V

1

Response message type

10.4

Authentication

Auth. parameter XRES

M

V

16

Parameter SRES1

10.5.3.4

Authentication

Auth. parameter CH

M

V

16

Parameter CH2

10.5.3.3

04

Authentication

Auth. parameter RIFP

O

TV

9

Parameter RIFP

10.5.3.2

9.2.11 CTS FP authentication response

This message is sent by the fixed part to the mobile station to deliver a calculated response to the mobile station. See table 9.2.14/GSM 04.56.

Message type: CTS FP AUTHENTICATION RESPONSE

Significance: dual

Direction: fixed part to mobile station

Table 9.2.14/GSM 04.56: CTS FP AUTHENTICATION RESPONSE message content

IEI

Information element

Type / Reference

Presence

Format

Length

CTS mobility management

Protocol discriminator

M

V

½

Protocol discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

½

10.3.1

CTS FP authentication response

Message type

M

V

1

Message type

10.4

Authentication

Auth. parameter XRES

M

V

16

Parameter SRES2

10.5.3.4

9.2.12 CTS MS authentication reject

This message is sent by the fixed part to the mobile station to indicate that the authentication has failed (and that the receiving mobile station shall abort all activities). See table 9.2.15/GSM 04.56.

Message type: CTS MS AUTHENTICATION REJECT

Significance: dual

Direction: fixed part to mobile station

Table 9.2.15/GSM 04.56: CTS MS AUTHENTICATION REJECT message content

IEI

Information element

Type / Reference

Presence

Format

Length

CTS mobility management

Protocol discriminator

M

V

½

Protocol discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

½

10.3.1

CTS MS authentication reject

Message type

M

V

1

Message type

10.4

Fixed part identity

Fixed part identity

M

LV

2-10

10.5.3.6

9.2.13 CTSMSI update command

This message is sent by the fixed part to the mobile station to update the CTSMSI. See table 9.2.16/GSM 04.56.

Message type: CTSMSI UPDATE COMMAND

Significance: dual

Direction: fixed part to mobile station

Table 9.2.16/GSM 04.56: CTS MSI UPDATE COMMAND message content

IEI

Information element

Type / Reference

Presence

Format

Length

CTS mobility management

Protocol discriminator

M

V

½

Protocol discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

½

10.3.1

CTSMSI update command

Message type

M

V

1

Message type

10.4

Mobile identity

Mobile identity

M

LV

2-9

10.5.1.1

9.2.14 CTSMSI update complete

This message is sent by the mobile station to the fixed part to indicate that the update of the CTSMSI has taken place. See table 9.2.17/GSM 04.56.

Message type: CTSMSI UPDATE COMPLETE

Significance: dual

Direction: mobile station to fixed part

Table 9.2.17/GSM 04.56: CTSMSI UPDATE COMPLETE message content

IEI

Information element

Type / Reference

Presence

Format

Length

CTS mobility management

Protocol discriminator

M

V

½

Protocol discriminator

10.2

Sub-Protocol Discriminator

Sub-Protocol Discriminator

M

V

½

10.3.1

CTSMSI update complete

Message type

M

V

1

Message type

10.4