Specifications

3GPP

3GPP TS 27.007 V6.3.0 (2003-

06)

Release 6

Description

Enabled command returns intermediate result code +CHSR: <type> from the TA to the TE when an HSCSD call is

being set up. The result code represents the current (negotiated or renegotiated) HSCSD parameters. If enabled, the

intermediate result code is transmitted at the point of the call setup negotiation where the TA has determined what type

of an HSCSD connection will be used. Result code transmission is done after possible service (+CR), error control

(+ER), and/or compression (+DR) reporting but before possible TE-TA rate (+ILRR) reporting and before the

intermediate result code CONNECT is transmitted. The format of the intermediate result code is:

+CHSR: <rx>,<tx>,<aiur>,<coding>

For the value definitions, refer to +CHSN and +CHSC commands. For instance, for a non-transparent HSCSD call, result

code '+CHSR: 2,2,4,8' means that the call has two timeslots in both up- and downlink, the air interface user rate is

28800 bps, and the used channel coding TCH/F14.4.

In UTRAN, all non-applicable parameters returned shall be equal to zero.

Defined values

<mode>:

disables reporting

1 enables reporting

Implementation

Mandatory when HSCSD implemented

6.17 HSCSD automatic user initiated upgrading + CHSU

Table 24: +CHSU parameter command syntax

Command

Possible response(s)

+CHSU=<mode>

+CHSU?

+CHSU: <mode>

+CHSU=?

+CHSU: (list of supported <mode>s)

Description

Set command controls whether or not automatic user initiated service level upgrading shall be used for non-transparent

HSCSD calls. "Automatic" means that, if enabled, the ME/TA shall use the UP bit in the received RLP frames to

determine when to initiate user initiated service level upgrading (i.e. when to modify the +CHSN parameters <wAiur>

and/or <wRx> for the current call). Refer to 3GPP TS 27.001 for details on the interpretation of the UP bit(s).

NOTE1: The validity of the UP bit in the RLP frames depends on the result of the RLP negotiations. The UP bit

shall only be used if the result of the RLP negotiations were successful with respect to the UP bit.

NOTE2: This command is only applicable in GERAN.

Defined values

<mode>:

0 disables use of UP bit for upgrading

1 enables use of UP bit for upgrading

Implementation

Optional

This command is not applicable to UTRAN single mode UE.