Multi-Tech Systems GPRS (MTMMC-G) Benutzerhandbuch

Chapter 15 – GPRS Commands  

Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 

151 

Description: 

This command allows the DTE to specify a Quality of Service Profile that is used when the modem 
sends an Activate PDP Context Request message to the network. 

 

The set command specifies a profile for the context identified by the local context identification 
parameter, <cid>. Since this is the same parameter that is used in the 

+CGDCONT command, the 

+CGQREQ command is effectively an extension to the +CGDCONT command. The QoS profile 
consists of a number of parameters, each of which may be set to a separate value. 

 

A special form of the set command, +CGQREQ= <cid>, causes the requested profile for context 
number <cid> to become undefined. 

 

The read command returns the current settings for each defined context. The test command returns 
values supported as a compound value. If the modem supports several PDP types, the parameter value 
ranges for each PDP type are returned on a separate line. 

Numeric parameter that specifies a particular PDP context definition

 

 

Range 1- 3

 <precedence> Numeric parameter that specifies the precedence class 

  

Subscribed precedence - Subscribed by the Network by default if value is omitted 

  

High priority. Service commitments shall be maintained ahead of precedence classes 2 & 3

  

Normal priority - Service commitments shall be maintained ahead of precedence class 3

  

Low priority - Service commitments shall be maintained after precedence classes 1 and 2 

Numeric parameter that specifies the delay class 

  

Subscribed 

  

Delay class 1

  

Delay class 2

  

Delay class 3 

  

Delay class 4 

 

Delay (maximum values) 

  Delay Class 

SDU size: 128 bytes 

SDU size: 1024 bytes 

Mean Transfer 
Delay (sec) 

95 percentile Delay 
(sec) 

Mean Transfer Delay 
(sec) 

95 percentile  Delay (sec) 

0 

Subscribed 

Subscribed by the Nwk / default if value is omitted 

1. (Predictive) 

   < 0.5 

 

< 2 

< 7 

2. (Predictive) 

   < 5 

< 25 

< 15 

< 75 

3. (Predictive) 

   < 50 

< 250 

< 75 

< 375 

4. (Best Effort) 

Unspecified 

0   

Subscribed 

1   

Up to 1 000 (8 kbit/s)

2   

Up to 2 000 (16 kbit/s)

3   

Up to 4 000 (32kbit/s) 

4   

Up to 8 000 (64 kbit/s) 

5   

Up to 16 000 (188 kbit/s) 

6   

Up to 32 000 (256 kbit/s) 

7   

Up to 64 000 (512 kbit/s) 

8   

Up to 128 000 (1 024 kbit/s) 

9   

Up to 256 000 (2 048 kbit/s)