A.2 Definition of values

3GPP43.010GSM Public Land Mobile Network (PLMN) connection typesRelease 16TS

Unrestricted digital data information:

Transfer of information sequence of bits at its specified bit rate without alteration.

This implies: – bit sequence independence;

– digit sequence integrity;

– bit integrity.

Speech:

Digital representation of speech coded according to a specified encoding rule (e.g. A Law, 3GPP TS 06‑series).

Demand connection:

A PLMN connection is set up at any time on demand via a digital channel in response to signalling information received from subscriber, other MSCs or other networks, i.e. on a per call basis.

Bidirectional symmetric:

This value applies when the information flow characteristics provided by the PLMN connection are the same between two (or more) access points or reference points in the forward and backward directions.

Bidirectional asymmetric (Multislot configurations for data):

This value applies when the information flow characteristics provided by the PLMN connection differ between two (or more) access points or reference points in the forward and backward directions on one or more TCH/Fs. In Multislot configurations for data the asymmetry is downlink biased, i.e. the MS may receive at a greater rate than it transmits.

Point-to-point connection:

This value applies when only two end points are provided by the connection.

Service data unit integrity:

This value applies when:

i) at each user-network interface, protocols provide a mechanism for identifying the boundaries of service data units; and

ii) all bits submitted within a single service data unit are delivered in a corresponding service data unit.

Unstructured:

This value is applicable when the PLMN connection neither provides structural boundaries nor preserves structural integrity.

Annex B (informative):
Location of the transcoding, multiplexing and RA2 functions

The location of the transcoding and data rate adaptation functions used to convert from the data rate used on the radio interface to the 64 kbits/s required by the MSC, is considered in this annex B. There are four alternatives which are equally valid from a connection type point of view. The selection of which alternative to use is not considered in 3GPP TS 43.010. The alternatives are shown in figure 10.

Alternative 1 assumes that all the transcoding and data rate adaptation is located at the BSS end of the A interface.

Alternative 2 assumes that all the transcoding and data rate adaptation is located at the MSC end of the A interface and gives no indication how the information is carried on the link.

Alternative 3 assumes that the information is transferred on the A interface in 8 or 16 kbit/s channels using one of the sub-multiplexing schemes described in CCITT Recommendation I.460. The same sub-multiplexing scheme is used for both speech and data.

Alternative 4 illustrates a multislot connection in which the information is transferred on the A-interface in 64 kbit/s channel into which up to four channels of intermediate rate 16 kbit/s have been multiplexed (refer to 3GPP TS 48.020). Alternative 4 also shows a situation in which a multislot connection of 5 or 6 TCH/Fs is used; the rate between the RA1’/RA1- and RA1’’-functions is 64 kbit/s.

The alternatives explained above correspond to all channels excluding TCH/F14.4 and EDGE.

Alternatives 1b, 2b, 3b, and 4b show similar approaches for channel codings TCH/F14.4, TCH/F28.8, and TCH/F43.2.

It should be noted that in all of the alternatives the transcoding and data rate adaptation are performed on the BSS side of the A-interface and is therefore considered to be a function of the BSS.

In the first three alternatives, the interface at the MSC is always based on 64 kbit/s without sub-multiplexing.

Figure 10: Location of transcoding and rate adaptation

Figure 10 (continued): Location of transcoding and rate adaptation

Figure 10 (concluded): Location of transcoding and rate adaptation

Legend

to Figure 10

GSC

= GSM Speech Codec

FEC

= Forward Error Correction

MPX

= Multiplex/Demultiplex

Figure 10 (concluded): Location of transcoding and rate adaptation

Annex C (informative):
Change History

Change history

Date

TSG #

TSG Doc.

CR

Rev

Subject/Comment

Old

New

S16

A001

2

Data Compression

5.0.0

S16

A002

Editorial correction to Channel Mode Modify

5.0.0

s21

A003

V.120 Interworking and RDI

5.0.0

5.1.0

s21

A004

HSCSD

5.0.0

5.1.0

s22

A005

Introduction of 14.4 kbit/s

5.1.0

5.2.0

s23

A006

Editorial modifications

5.2.0

5.3.0

s24

A007

Removal of 2*14.4=19.2 Transparent configuration

5.3.0

5.4.0

s27

A008

Clarification of RA0 adaptation function

5.4.0

7.0.0

s27

A009

Information transfer protocol model updates

5.4.0

7.0.0

s29

A010

Introduction of EDGE channel codings into the specifications

7.0.0

8.0.0

12-1999

TSG#06

A011

Service Clean up R99

8.0.0

8.1.0

09-2000

TSG#09

NP-000551

A012

32 kbit/s UDI/RDI multimedia in GSM

8.1.0

8.2.0

12-2000

TSG#10

NP-000604

A013

TCH/F32.0 reference models

8.2.0

8.3.0

12-2000

TSG#10

NP-000606

A014

Removal of BS 30 NT

8.3.0

4.0.0

03-2001

TSG#11

NP-010047

001

Removal of the S-reference point in MS

4.0.0

4.1.0

03-2001

TSG#11

NP-010047

002

Addition changes for removal BS30NT of BS30 NT and packet access

4.0.0

4.1.0

03-2001

TSG#11

NP-010046

003

Removal of FAX NT in GSM from Rel-4

4.0.0

4.1.0

03-2001

TSG#11

NP-010047

004

Removal of speech model

4.0.0

4.1.0

03-2002

TSG#15

NP-010085

005

1

Terminology Clarifications as requested by TSG GERAN

4.1.0

5.0.0

09-2002

TSG#17

NP-020405

006

1

Correction of Rate Adaptation Functions and removal of S Reference Point in MS

5.0.0

5.1.0

12-2002

TSG#18

NP-020617

007

1

CS Data Services (including HSCSD and EDGE) for GERAN Iu mode

5.1.0

5.2.0

12-2004

CN#26

Upgraded to v6.0.0

5.2.0

6.0.0

06-2007

CT#36

Upgraded to v7.0.0

6.0.0

7.0.0

12-2008

CT#42

Upgraded to v8.0.0

7.0.0

8.0.0

12-2009

CT#46

Automatic upgrade from previous Release

8.0.0

9.0.0

03-2011

CT#51

Automatic upgrade from previous Release version 9.0.0

9.0.0

10.0.0

03-2011

CT#51

Correction of heading and numbering made by MCC

10.0.0

10.0.1

09-2012

CT#57

Automatic upgrade from previous Release version 10.0.1

10.0.1

11.0.0

09-2014

Format of figures 1 to 5 corrected

11.0.0

11.0.1

2014-10

Automatic upgrade from previous Release

11.0.1

12.0.0

2015-12

Automatic upgrade from previous Release

12.0.0

13.0.0

Change history

Date

TSG #

TSG Doc.

CR

Rev

Cat

Subject/Comment

New

2017-03

CT#75

14.0.0

2018-06

SA#80

Automatic upgrade from previous Release

15.0.0

2020-07

SA#88e

Update to Rel-16 version (MCC)

16.0.0