name: LCID
full_form: Logical Channel Identifier
context: 8.2.2.2.4.1 General Protection for the traffic between the UEs is provided at the PDCP layer. As the security is not preserved through a drop of the connection, all signalling messages that are need to be sent before security is established may be sent with no protection. Editor's note: This exact message that may be sent without protection are FFS. All other messages are both integrity and confidentiality protected except the Direct Security Mode Command which is sent integrity protected only. The bearer with LCID = 0 is used to carry signalling messages that are not protected. The bearer with LCID = 1 is used for Direct Security Mode Command and Direct Security Mode Complete. The bearer with LCID = 2 is used for signalling messages that are confidentiality and integrity protected. The bearer with LCID = 3 to 31 may be used for user plane traffic with confidentiality protection. 8.2.2.2.4.2 Integrity protection ProSe enabled Public Safety UEs implements 128-EEA1 and 128-EEA2 and may
description: Logical Channel Identifier (LCID) is a parameter used to identify logical channels in the PDCP layer, which is responsible for protecting user data and signalling messages. LCID values are assigned to specific bearers to differentiate between protected and unprotected traffic.
explanation: The context explicitly mentions LCID as an identifier for logical channels, highlighting its role in distinguishing between different types of traffic (protected and unprotected) in the PDCP layer.
section_title: 8.2.2.2.4	Protection of the one-to-one traffic
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