name: DSM
full_form: Direct Security Mode
context: initiating UE receiving a DCR message from the peer UE1 creates a security context and saves the received MSB of Kd session ID. An LSB of Kd session is generated and saved into the security context. The LSB of Kd session is sent to the peer UE1 using DSM Command message. 3a. The initiating UE also receives a DCR message from the peer UE3. It creates another security context and saves the received MSB of Kd session ID. Another LSB of Kd session is generated and saved into this security context. The corresponding LSB of Kd session is sent to the peer UE3 using DSM Command message. 4. The peer UE1 updates its security context with the received LSB of Kd session ID and replies with a DSM Complete message. 4a. The peer UE3 also updates its security context with the received LSB of Kd session ID and replies with a DSM Complete message. 5. The initiating UE completes the unicast link establishment by sending a DCA message to the peer UE1. 5a. Same thing with the peer UE3, i.e. the initiating
description: A DSM Command message is used for exchanging security context information between User Equipment (UE) during the unicast link establishment process in Direct Security Mode. It facilitates the secure communication by transferring the Least Significant Bit (LSB) of the Kd session ID between peer UEs.
explanation: The description explicitly states that the message is used for 'exchanging security context information' and 'unicast link establishment', which are core functions of signaling messages in telecommunications.
section_title: 6.2.2	Solution details
biotag_Context: O,B-Device,O,O,B-Message,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,B-Message,O,O,O,O,O,B-Device,O,O,O,B-Message,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,B-Message,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,B-Parameter,O,O,O,O,B-Message,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,B-Parameter,O,O,O,O,B-Message,O,O,O,O,O,B-Device,O,O,O,O,O,O,O,O,B-Technology,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O
biotag_Description: O,B-Message,O,O,O,O,O,O,O,O,O,O,B-Device,I-Device,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,I-Parameter,I-Parameter,O,O,O,O,O,B-Parameter,O,O,O