125
A.3
PDUs for key association to GTSI
A.3.1
D-OTAR KEY ASSOCIATE demand
ETSI EN 300 392-7 V2.3.1 (2006-06)
Shall be used by SwMI to associate or disassociate a cipher key with one or more groups. •
Direction:
SwMI to MS;
•
Service used:
MM;
•
Response to:
none;
•
Response expected:
U-OTAR KEY ASSOCIATE STATUS or none.
Table A.24: D-OTAR KEY ASSOCIATE demand contents Information element PDU Type OTAR sub type Acknowledgement flag
Length Type 4 1 4 1 1 1
Explicit response (see note 3) Max response timer value
1
1
16
1
Key association type SCK select number SCK subset grouping type GCK select number Number of groups
1 6 4 17 5
1
1
C/O/M Remark M D-OTAR. M Key associate demand. M If "0" No acknowledgement required. If "1" Acknowledgement required. M If "0" MS shall respond if state changes. If "1" MS shall always respond. M Identifies the maximum period over which the MS will randomly choose to respond. M SCK (0), GCK (1). C Provided if key type = SCK. C Provided if key type = SCK. C Provided if key type = GCK. M (0) reserved, (1 to 30) number of groups, (31) range of groups. C Repeated element. O
GSSI (see note 1) 24 Address extension 24 2 (see note 2) NOTE 1: The GSSI element is repeated; total number GSSI elements = value of "Number groups" element. For 0 < Number of Groups < 31; = 2 for Number of Groups = 31, and GSSI elements shall contain the lowest followed by the highest value GSSI in the range. GSSI can only be provided for a single network within the same PDU. NOTE 2: The address extension element is only present if the network code for which the provided GSSIs relate is different to the serving network. NOTE 3: The "explicit response" element is only valid if "Acknowledgment field" is set to "1".
A.3.2
U-OTAR KEY ASSOCIATE status
Shall be used by MS to indicate successful association or disassociation of a cipher key with one or more groups. •
Direction:
MS to SwMI;
•
Service used:
MM;
•
Response to:
D-OTAR KEY ASSOCIATE DEMAND
•
Response expected:
none.
ETSI