name: VAL
full_form: Vertical Application Layer
context: Authorization framework when using HTTP is shown in figure 5.2.5-1. A secure HTTP tunnel using HTTPS between VAL UE and VAL server shall be established before VAL service authorization. Subsequent VAL service authorization messaging make use of this tunnel. The service clients in the VAL UE present the access tokens to the VAL server over HTTP. The VAL server authorizes the user for the requested services only if the access token is valid. The procedures may be repeated as necessary to obtain additional VAL user authorizations. Figure 5.2.5-1: VAL User Service Authorization After the VAL UE establishing a secure connection with the VAL server, the VAL UE sends an HTTP message containing the access token to the VAL server where service authorization is requested. The VAL server receives the message and validates the access token. If the access token is valid, The VAL server positively acknowledges the request. The VAL server may provide service related information to the VAL UE at this
description: The Vertical Application Layer (VAL) is a network function that enables secure communication between user equipment (UE) and servers for vertical applications, handling authorization and access control for services.
explanation: VAL is classified as a Network Function based on its role in managing secure connections, authorizing users, and controlling access to services within the network.
section_title: 5.2.5	Authorization framework
biotag_Context: O,O,O,O,B-Protocol,O,O,O,O,O,O,O,B-Protocol,O,O,B-Protocol,O,B-Network Function,B-Device,O,B-Network Function,O,O,O,O,O,B-Network Function,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,B-Device,O,O,O,O,O,O,B-Network Function,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,B-Network Function,O,O,O,O,O,B-Network Function,B-Device,O,O,O,O,O,O,B-Network Function,O,O,B-Network Function,B-Device,O,O,B-Protocol,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,B-Network Function,B-Device,O,O
biotag_Description: O,B-Network Function,I-Network Function,I-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O