name: MAC
full_form: Medium Access Control
context: A MAC PDU consists of one or more MAC subPDUs. Each MAC subPDU consists of one of the following: - A MAC subheader only (including padding); - A MAC subheader and a MAC SDU; - A MAC subheader and a MAC CE; - A MAC subheader and padding. The MAC SDUs are of variable sizes. Each MAC subheader corresponds to either a MAC SDU, a MAC CE, or padding. A MAC subheader except for fixed sized MAC CE, padding, and a MAC SDU containing UL CCCH consists of the header fields R/F/LCID/(eLCID)/L. A MAC subheader for fixed sized MAC CE and padding consists of the header fields R/LCID/(eLCID). A MAC subheader for a MAC SDU containing UL CCCH consists of the header fields (LX)/R/LCID. Figure 6.1.2-1: R/F/LCID/(eLCID)/L MAC subheader with 8-bit L field Figure 6.1.2-2: R/F/LCID/(eLCID)/L MAC subheader with 16-bit L field Figure 6.1.2-3: (LX)/R/LCID/(eLCID) MAC subheader MAC CEs are placed together. DL MAC subPDU(s) with MAC CE(s) is placed before any MAC subPDU with MAC SDU and MAC subPDU with padding as
description: Medium Access Control (MAC) is a protocol that governs access to a shared medium in telecommunications networks. It manages multiple devices accessing the same physical medium, resolves conflicts, and ensures efficient data transmission.
explanation: The text describes MAC as a set of rules governing access to a shared medium and managing data transmission between devices. This definition aligns with the characteristics of a protocol.
section_title: 6.1.2MAC PDU (DL-SCH and UL-SCH except transparent MAC and Random Access Response)
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biotag_Description: B-Protocol,I-Protocol,I-Protocol,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,O,O,O,O,O