7 Relationship between Telecommunication services and connection types

3GPP43.010GSM Public Land Mobile Network (PLMN) connection typesRelease 17TS

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

7.1 General

Given a request for a telecommunication service at the initiation of a call, the PLMN must establish a connection of a connection type that supports the attributes of the service requested. This establishment of a connection is effected at the time of call set up.

It should be noted that PLMN connection types represent the technical capabilities of a PLMN and provide a basis for the definition of performance and interworking with other networks. Telecommunication services supported by PLMN are the packages offered to customers and the definition of their attributes is the means to standardize the service offerings in all PLMNs.

Quality of service and commercial attributes are relevant to telecommunication services whereas connection types are characterized by network performance, network operations and maintenance attributes.

7.2 Relationship between Bearer services and connection types

Table 5 shows the relationship between Bearer services and PLMN connection types. In table 5, the connection elements for each connection type related to a Bearer service are shown.

Dominant attributes of the connection elements, such as information transfer mode, information transfer rate, information transfer capability and structure are indicated. The type of radio traffic channel used is also shown (half rate and full rate). In the multislot cases the minimum number of timeslots per connection (n) is 1.

7.3 Relationship between Teleservices and connection types

Table 6 shows the relationship between teleservices and connection type elements, for those teleservices having PLMN connection type which does not correspond to the PLMN connection type of a bearer service. As in table 5/3GPP TS 43.010, dominant attributes of the connection elements and the type of radio traffic channel are shown. In the multislot cases the minimum number of timeslots per connection (n) is 1.

7.4 Network capability to support in-call modification

Specifications 3GPP TS 22.002 and 22.003 identify a particular need for a PLMN to support the Alternate speech and group 3 facsimile.

This service allows the use of in-call modification to change the mode of service. The network capability to support in-call modification is described in 3GPP TS 24.008. An in-call modification of the service mode is not possible for other services.

7.5 Network capability to support channel mode modification

Specification 3GPP TS 43.045 (Technical Realization of the Group 3 Facsimile Teleservice) identifies a need for a PLMN to support channel mode modification within the facsimile phase of the alternate speech and facsimile group 3 service. The network capability to support channel modification is described in 3GPP TS 24.008. Channel mode modification is not possible for other services. A channel mode modification results in a change of connection element over the radio interface with resultant change in access at the mobile station.

Table 5: Relationship between Bearer services and PLMN Connection elements

Connection description	Bearer service user data rate	Radio interface connection element	Intermediate rate at the BSS-MSC interface	BSS-MSC connection element	Protocol model in figure 6, 7, 8, 9, 10, 11, 12 or 13
Circuit mode unstructured with unrestricted digital capability transparent.	Data circuit duplex async n  4 800 (n  4) or n  9 600 bit/s (n  4). Data circuit duplex sync n  4 800 (n  4) or n  9 600 bit/s (n  5) or n  1 1200 bit/s (n = 5 or 6).	cct mode unstructured unrestricted n  6 kbit/s (n  4) or n  12 kbit/s (n  6) on n full rate channels.	8 or 16 kbit/s per TCH/F. For data connections using 5 or 6 TCH/Fs no intermediate rate(s) .	cct mode unstructured unrestricted 64 kbit/s.	Fig 6 : 1 e, 2 e Fig 10 : 1 e, 2 e
	Data circuit duplex async n  14 400 bit/s ( n  3). Data circuit duplex sync n  14 400 bit/s (n  5)	cct mode unstructured unrestricted n x 14.5 kbit/s (n  5) on n full rate channels	16 kbit/s per TCH/F.	cct mode unstructured unrestricted 64 kbit/s.	Fig 7 : 1 e, 2 e Fig 11 : 1 e, 2 e
	Data circuit duplex async 28 800 bit/s. Data circuit duplex sync 28 800 bit/s	cct mode unstructured unrestricted 29.0 kbit/s on full rate channel	16 kbit/s per TCH/F.	cct mode unstructured unrestricted 64 kbit/s.	Fig 8 : 1 b, 2 b Fig 12 : 1 b, 2 b
	Data circuit duplex Sync 32 000 bit/s	cct mode unstructured unrestricted 32 kbit/s on full rate channel	32 kbit/s		Fig 9 : 2 b Fig 13 : 2 b
	Data circuit duplex sync 64 000 bit/s	cct mode unstructured unrestricted 2 x 32.0 kbit/s on full rate channels	No intermediate rate for the 64 000 bit/s rate		Fig 9 : 2 e Fig 13 : 2 e
	Data circuit duplex async 14 400 bit/s Data circuit duplex sync 14 400 bit/s	cct mode unstructured unrestricted 14.5 kbit/s on full rate Channel	16 kbit/s	cct mode unstructured unrestricted 64 kbit/s.	Fig 7 : 1 b, 2 b Fig 11 : 1 b, 2 b
	Data circuit duplex async 9 600 bit/s. Data circuit duplex sync 9 600 bit/s.	cct mode unstructured unrestricted 12 kbit/s on full rate channel.	16 kbit/s.	cct mode unstructured unrestricted 64 kbits/s.	Fig 6 : 1 b 2 b
	Data circuit duplex async 4 800 bit/s. Data circuit duplex sync 4 800 bit/s.	cct mode unstructured unrestricted 6 kbit/s on full rate channel and half rate channel.	8 kbit/s.	cct mode unstructured unrestricted 64 kbits/s.	Fig 6 1 b 2 b
	Data circuit duplex async 300. Data circuit duplex async 1 200. Data circuit duplex async 2 400. Data circuit duplex sync 1 200. Data circuit duplex sync 2 400.	cct mode unstructured unrestricted 3.6 kbit/s on full rate channel and half rate channel.	8 kbit/s.	cct mode unstructured unrestricted 64 kbits/s.	Fig 6 : 1 b

Connection description	Bearer service user data rate	Radio interface connection element	Intermediate rate at the BSS-MSC interface	BSS-MSC connection element	Protocol model in figure 6, 7, 8, 9, 10, 11, 12 or 13
Circuit mode unstructured with unrestricted digital capability non transparent.	Data circuit duplex async n  4 800 (n  4) or n  9 600 bit/s (n  4).	cct mode SDU unrestricted n  6 kbit/s (n  4) or n  12 kbit/s (n  4) on full rate channels.	8 or 16 kbit/s per TCH/F.	cct mode unstructured unrestricted 64 kbit/s.	Fig 6 : 3 e Fig 10 : 3 e
	Data circuit duplex async n  14 400 bit/s (n  4).	cct mode SDU unrestricted n  14.5 kbit/s (n  4) on full rate channels.	16 kbit/s	cct mode unstructured unrestricted 64 kbit/s.	Fig 7 : 3 e Fig 11 : 3 e
	Data circuit duplex async n x 28 800 bit/s (n  2). Data circuit duplex async 43 200 bit/s	cct mode SDU unrestricted n  29.0 kbit/s (n  2) on full rate channels. cct mode SDU unrestricted 43.5 kbit/s on a full rate channel.	16 kbit/s per TCH/F. 16 kbit/s per TCH/F.	cct mode unstructured unrestricted 64 kbit/s.	Fig 8 : 3 b Fig 12 : 3 b
	Data circuit duplex async 14 400 bit/s	cct mode SDUunrestricted 14.5 kbit/s on full rate channel	16 kbit/s	cct mode unstructured unrestricted 64 kbit/s.	Fig 7 : 3 b Fig 11 : 3 e
	Data circuit duplex async 9 600 bit/s.	cct mode SDU unrestricted 12 kbit/s on full rate channel.	16 kbit/s.	cct mode unstructured unrestricted 64 kbits/s.	Fig 6 : 3 b Fig 10 : 3 b
	Data circuit duplex async 4 800 bit/s.	cct mode SDU unrestricted full rate channel, 12 kbit/s or half rate channel, 6 kbit/s.	16 kbit/s FR 8 kbit/s HR.	cct mode unstructured unrestricted 64 kbits/s.	Fig 6 : 3 b Fig 10 : 3 b
	Data circuit duplex async 300. Data circuit duplex async 1 200. Data circuit duplex async 2 400.	cct mode SDU unrestricted full rate channel, 12 kbit/s or half rate channel, 6 kbit/s.	16 kbit/s FR 8 kbit/s HR.	cct mode unstructured unrestricted 64 kbits/s.	Fig 6 : 3 b Fig 10 : 3 b

Connection description	Bearer service user data rate	Radio interface connection element	Intermediate rate at the BSS-MSC interface		BSS-MSC connection element		Protocol model in figure 6, 7, 8, 9, 10, 11, 12 or 13
Circuit mode unstructured with 3.1 kHz audio ex PLMN transparent.	Data circuit duplex async n  4 800 bit/s (n  4) or n  9 600 bit/s (n  3). Data circuit duplex sync n  4 800 bit/s (n  4) or n  9 600 bit/s (n  3).	cct mode unstructured unrestricted n  6 kbit/s (n  4) or n  12 kbit/s (n  3) on n full rate channels.	8 or 16 kbit/s TCH/F.	cct mode unstructured unrestricted 64 kbit/s.		Fig 6 : 1 e, 2 e Fig 10 : 1 e, 2 e
	Data circuit duplex async n  14 400 bit/s (n  2). Data circuit duplex sync n  14 400 bit/s (n  2)	cct mode unstructured unrestricted x 14.5 kbit/s (n  2) on n full rate channels	16 kbit/s per TCH/F	cct mode unstructured unrestricted 64 kbit/s.		Fig 7 : 1 e, 2 e Fig 11 : 1 e, 2 e
	Data circuit duplex async 28 800 bit/s. Data circuit duplex sync 28 800 bit/s	cct mode unstructured unrestricted 29.0 kbit/s on a full rate channel	16 kbit/s per TCH/F.	cct mode unstructured unrestricted 64 kbit/s.		Fig 8 : 1 b, 2 b Fig 12 : 1 b, 2 b
	Data circuit duplex asynch 14 400 bit/s synch 14 400 bit/s	cct mode unstructured unrestricted 14.5 kbit/s on full rate channels	16 kbit/s	cct mode unstructured unrestricted 64 kbit/s.		Fig 7 : 1 b for async Fig 7 :2 b for synch
	Data circuit duplex async 9.6 kbit/s sync 9.6 kbit/s.	cct mode unstructured unrestricted 12 kbit/s full rate channel.	16 kbit/s.
	Data circuit duplex async 4.8 kbit/s sync 4.8 kbit/s.	cct mode unstructured unrestricted 6 kbit/s full and half rate channel.	8 kbit/s.	cct mode unstructured unrestricted 64 kbit/s.		Fig 6 : 1 b for asynch. Fig 6 : 2 b for synch.
	Data circuit duplex async  2 400 sync  2 400.	cct mode unstructured unrestricted 3.6 kbit/s full and half rate channel.	8 kbit/s.

Connection description	Bearer service user data rate	Radio interface connection element	Intermediate rate at the BSS-MSC interface	BSS-MSC connection element		Protocol model in figure 6, 7, 8, 9, 10, 11, 12 or 13
Circuit mode unstructured with 3.1 kHz audio ex PLMN non transparent.	Data circuit duplex async n  4 800 (n  4) or n  9 600 (n  4) bit/s.	cct mode SDU unrestricted n  6 kbit/s (n  4) or n  12 kbit/s (n  4) on full rate channels.	8 or 16 kbit/s per TCH/F.	cct mode unstructured unrestricted 64 kbits/s.		Fig 6 : 3 e Fig 10 : 3 e
	Data circuit duplex async n  14 400 bit/s (n  4).	cct mode SDU unrestricted n x 14.5 kbit/s (n  4) on n full rate channels	16 kbit/s per TCH/F	cct mode unstructured unrestricted 64 kbits/s.	Fig 7 : 3 e Fig 11 : 3 e
	Data circuit duplex async 28 800 bit/s. Data circuit duplex async 43 200 bit/s	cct mode SDU unrestricted 29.0 kbit/s on a full rate channel. cct mode SDU unrestricted 43.5 kbit/s on a full rate channel.	16 kbit/s per TCH/F. 16 kbit/s per TCH/F.	cct mode unstructured unrestricted 64 kbits/s.	Fig 8 : 3 b Fig 12 : 3 e

	Data circuit duplex asynch 14 400 bit/s	cct mode SDU unrestricted 14.5 kbit/s full rate channel	16 kbit/s	cct mode unstructured unrestricted 64 kbits/s.	Fig 7 : 3 b Fig 11 : 3 b
	Data circuit duplex async 9.6 kbit/s	cct mode SDU unrestricted 12 kbit/s full rate channel.	16 kbit/s.
	Data circuit duplex async 4.8 kbit/s	cct mode SDU unrestricted half rate channel, 6 kbit/s or full rate channel, 12 kbit/s.	16 kbit/s FR 8 kbit/s HR.	cct mode unstructured unrestricted 64 kbit/s.	Fig 6 : 3 b Fig 10 : 3 b
	Data circuit duplex async  2 400	cct mode SDU unrestricted half rate channel, 6 kbit/s or full rate channel, 12 kbit/s.

Table 6: Relationship between Teleservices and PLMN connection types

Teleservice in a PLMN	Access at mobile station	Radio interface connection element	Intermediate rate at the BSS-MSC interface	BSS-MSC connection element	Protocol model in figure 6 or 7
Telephony.		cct mode speech.	NA.	cct mode structured 64 kbit/s speech.	Fig 6 : 6
Emergency calls.		cct mode speech.	NA.	cct mode structured 64 kbit/s speech.	Fig 6 : 6
Alternate Speech/ Facsimile Group 3.	Data cct duplex synchronous access alternate speech/ group 3 fax.	cct mode speech alternating with unstructured unrestricted 3.6 or 6 or 12 kbit/s or n  6 kbit/s (n  3) or n  12 kbit/s (n  2) on FR transparent.	Speech NA 8 or 16 kbit/s per TCH/F.	cct mode structured 64 kbit/s alternate speech/unrestricted.	Fig 6 : 5a or 5b and 6
		cct mode speech alternating with unstructured unrestricted 14.5 kbit/s or n  14.5 kbit/s (n  2) on FR transparent	Speech NA 16 kbit/s per TCH/F.		Fig 7 : 5a or 5b and 6
Automatic Facsimile Group 3.	Data cct duplex synchronous access group 3 fax.	cct mode unstructured unrestricted 3.6 or 6 or 12 kbit/s or n  6 kbit/s (n  3) or n  12 kbit/s (n  2) on FR transparent.	8 or 16 kbit/s per TCH/F.	cct mode structured 64 kbit/s unrestricted.	Fig 6 : 5a, 5b
		cct mode unstructured unrestricted 14.5 kbit/s or n  14.5 kbit/s (n  2) on FR transparent	16 kbit/s per TCH/F.

NA: Not Applicable

NOTE: The multislot data connections and the connections using TCH/F14.4 coding belong to the General Bearer Services (Classes 20 and 30 in 3GPP TS 22.002).

Annex A (informative):
List of definitions of PLMN connection type attributes and values