name: PTM
full_form: Point-to-Multipoint
context: The following example shows a scenario for MBMS session ends followed by a termination of the MBMS service. Figure 50: MBMS Session stop and Service termination 1. In this scenario it is assumed that an MBMS Session is ongoing with UE in DRNC receiving MBMS service over PTM bearers. 2. End of MBMS data session; 3. CN invokes RANAP MBMS Session Stop message towards all RNC that are explicitly or implicitly registered with the CN. RAB resources and Iu signaling connection are released. Parameters: MBMS CN De-registration 4. RNCs send RANAP MBMS Session Stop Response messagess back to SGSN. 5. DRNC as CRNC also update and remove all relevant information related to the MBMS Service on the MCCH: RRC Modified Services Info message on MCCH. Parameters: TMGI, Release PTM RB; and all RB info on the PTM bearer for the service on RRC. Common PTM RB Info, Current Cell PTM RB Info, Neighbouring Cell PTM RB Info 6. UE releases the Radio Bearer for the MBMS service. 7. Iub bearer is released using
description: Point-to-Multipoint (PTM) refers to a type of bearer in the context of Multimedia Broadcast Multicast Service (MBMS). It is used for transmitting data from a single source to multiple destinations, specifically in the downlink direction. In this scenario, PTM bearers are utilized for delivering MBMS services over the radio access network.
explanation: PTM is classified as a Channel entity type because it acts as a conduit for data transmission within the MBMS system. It facilitates the delivery of broadcast content from a single source to multiple user equipment (UEs) via dedicated bearers.
section_title: 7.19.5	MBMS Session Stop and Service termination
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