6 Specific requirements

04.053GPPData Link (DL) Layer General AspectsRelease 1999TS

6.1 Mode of operation and allowed SAPIs

The various types of channels shall support SAPIs and modes of operation as follows:

Type of channel

SAPI = 0

SAPI = 3

BCCH

Unacknowledged

Not supported

CCCH

Unacknowledged

Not supported

SDCCH

Unacknowledged and acknowledged

Acknowledged

SACCH associated with SDCCH

Unacknowledged

Not Supported

SACCH associated with TCH

Unacknowledged

Acknowledged

FACCH

Unacknowledged and acknowledged

Not supported

6.2 Acknowledged mode of operation

6.2.1 Window size

The window size, k (see 3GPP TS 04.06), shall be:

‑ for SAPI = O, k = 1;

‑ for SAPI = 3, k = 1.

Other SAPIs, for further study.

6.2.2 Processing capacity

The processing capacity of the MS and the network shall be big enough to avoid that the data link layer entities enter the receiver busy state for SAPI = 0.

Annex A (informative):
Change History

Meeting/Date

CR

Change

New version

V7.1.0

A001

Addition of Preemption capability for SAPI 0 in LAPDm

Version update to 8.0.1 for Publication

V8.0.1

May 2002

Format changed to 3GPP TS style

8.0.2