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5G MAC Control Elements Index

This page is the database-style index for the MAC control-element family. Its purpose is fast lookup, categorization, and future expansion, not long-form theory.

Use this page when you already know that a MAC control element is involved and want a quick way to place it within the larger MAC library. The deeper explanations should stay on the concept or procedure pages.

Page type Index and database-style reference
Main use Quick lookup and navigation into deeper concept pages
Best paired with Control-elements overview, PDU format, and procedure pages
Scalability role Supports future CE-specific pages and tooling

How this index should be used

The role of the page in the library.

This page should stay light and navigational. A quick lookup here helps locate a CE family quickly, not to read a long tutorial.

The best pattern is simple category tables with links outward into the explanatory pages where the CE has real context.

Clause coverage map

The main section groupings inside TS 38.321 clause 6.1.3.

Clause rangeMain focusWhy it matters
6.1.3.1 to 6.1.3.9Core reporting, identity, timing, DRX, and PHR controlThese are the most common MAC CE entries in day-to-day trace reading.
6.1.3.10 to 6.1.3.32Activation, CSI, SRS, beam, pathloss, and grant-control behaviorThese clauses expand MAC CE coverage into advanced radio and scheduling control.
6.1.3.33 to 6.1.3.43Sidelink, positioning, and enhanced beam-related controlImportant when the MAC CE space extends beyond ordinary unicast scheduling.
6.1.3.44 to 6.1.3.83Advanced TCI, multiple TRP, inter-UE coordination, IAB, NCR, delay, and positioning extensionsShows how broad the Release 18 MAC CE space has become.

MAC CE catalog

Grouped lookup tables for the clause 6.1.3 entries.

Core reporting, identity, timing, and DRX control

ClauseMAC CE entryTopic groupCurrent page
6.1.3.1Buffer Status Report (BSR) MAC CEsReportingBSR MAC CEs
6.1.3.2C-RNTI MAC CEIdentityC-RNTI MAC CE
6.1.3.3UE contention-resolution identity MAC CERandom access related controlUE Contention Resolution Identity MAC CE
6.1.3.4Timing advance command MAC CETiming controlTiming Advance Command MAC CE
6.1.3.4aAbsolute timing advance command MAC CETiming controlPlanned CE page
6.1.3.5DRX command MAC CEActivity controlDRX Command MAC CEs
6.1.3.6Long DRX command MAC CEActivity controlDRX Command MAC CEs
6.1.3.7Configured grant confirmation MAC CEGrant controlPlanned CE page
6.1.3.8Single-entry PHR MAC CEPower reportingPHR MAC CEs
6.1.3.9Multiple-entry PHR MAC CEPower reportingPHR MAC CEs

Activation, CSI, SRS, beam, and pathloss control

ClauseMAC CE entryTopic groupCurrent page
6.1.3.10SCell activation or deactivation MAC CEsServing cell controlSCell Activation and Deactivation MAC CEs
6.1.3.11Duplication activation or deactivation MAC CEDuplication controlPlanned CE page
6.1.3.12SP CSI-RS or CSI-IM resource-set activation or deactivation MAC CECSI controlPlanned CE page
6.1.3.13Aperiodic CSI trigger-state subselection MAC CECSI controlPlanned CE page
6.1.3.14TCI states activation or deactivation for UE-specific PDSCHTCI controlPlanned CE page
6.1.3.15TCI state indication for UE-specific PDCCHTCI controlPlanned CE page
6.1.3.16SP CSI reporting on PUCCH activation or deactivationCSI reporting controlPlanned CE page
6.1.3.17SP SRS activation or deactivationSRS controlPlanned CE page
6.1.3.18PUCCH spatial relation activation or deactivationPUCCH controlPlanned CE page
6.1.3.19SP ZP CSI-RS resource-set activation or deactivationCSI controlPlanned CE page
6.1.3.20Recommended bit rate MAC CERate controlPlanned CE page
6.1.3.21Timing delta MAC CETiming controlPlanned CE page
6.1.3.22Guard symbols MAC CEsTiming and guard controlPlanned CE page
6.1.3.23BFR MAC CEsBeam failure related controlBFR MAC CEs
6.1.3.24Enhanced TCI states activation or deactivation for UE-specific PDSCHEnhanced TCI controlPlanned CE page
6.1.3.25Enhanced PUCCH spatial relation activation or deactivationEnhanced PUCCH controlPlanned CE page
6.1.3.26Enhanced SP or AP SRS spatial relation indicationEnhanced SRS controlPlanned CE page
6.1.3.27SRS pathloss reference RS updatePathloss reference controlPlanned CE page
6.1.3.28PUSCH pathloss reference RS updatePathloss reference controlPlanned CE page
6.1.3.29Serving-cell-set-based SRS spatial relation indicationSRS controlPlanned CE page
6.1.3.30LBT failure MAC CEsLBT controlPlanned CE page
6.1.3.31Multiple-entry configured grant confirmation MAC CEGrant controlPlanned CE page
6.1.3.32Duplication RLC activation or deactivation MAC CEDuplication controlPlanned CE page

Sidelink, positioning, measurement-gap, and enhanced beam control

ClauseMAC CE entryTopic groupCurrent page
6.1.3.33Sidelink Buffer Status Report MAC CEsSidelink reportingSidelink MAC CEs
6.1.3.34Sidelink configured grant confirmation MAC CESidelink grant controlSidelink MAC CEs
6.1.3.35Sidelink CSI reporting MAC CESidelink CSISidelink MAC CEs
6.1.3.36SP positioning SRS activation or deactivation MAC CEPositioning controlPositioning and Delay MAC CEs
6.1.3.37Guard symbols MAC CEs for case-6 and case-7 timingAdvanced timing controlPositioning and Delay MAC CEs
6.1.3.38Case-7 timing advance offset MAC CEAdvanced timing controlPositioning and Delay MAC CEs
6.1.3.39Case-6 timing request MAC CEAdvanced timing controlPositioning and Delay MAC CEs
6.1.3.40Positioning measurement-gap activation or deactivation requestPositioning controlPositioning and Delay MAC CEs
6.1.3.41Positioning measurement-gap activation or deactivation commandPositioning controlPositioning and Delay MAC CEs
6.1.3.42PPW activation or deactivation command MAC CEPositioning or feature controlPositioning and Delay MAC CEs
6.1.3.43Enhanced BFR MAC CEsEnhanced beam failure controlBFR MAC CEs

Advanced TCI, TRP, PHR, sidelink, timing, and coordination control

ClauseMAC CE entryTopic groupCurrent page
6.1.3.44Enhanced TCI states indication for UE-specific PDCCHEnhanced TCI controlPlanned CE page
6.1.3.45PUCCH spatial relation activation or deactivation for multiple TRP PUCCH repetitionMultiple TRP controlPlanned CE page
6.1.3.46PUCCH power control set update for multiple TRP PUCCH repetitionMultiple TRP power controlPlanned CE page
6.1.3.47Unified TCI states activation or deactivationUnified TCI controlPlanned CE page
6.1.3.48Enhanced single-entry PHR MAC CEEnhanced power reportingPHR MAC CEs
6.1.3.49Enhanced multiple-entry PHR MAC CEEnhanced power reportingPHR MAC CEs
6.1.3.50Enhanced single-entry PHR for multiple TRPEnhanced power reportingPHR MAC CEs
6.1.3.51Enhanced multiple-entry PHR for multiple TRPEnhanced power reportingPHR MAC CEs
6.1.3.52Sidelink DRX command MAC CESidelink activity controlSidelink MAC CEs
6.1.3.53Inter-UE coordination information MAC CEInter-UE coordinationPlanned CE page
6.1.3.54Inter-UE coordination request MAC CEInter-UE coordinationPlanned CE page
6.1.3.55Enhanced SCell activation or deactivation MAC CEEnhanced serving cell controlSCell Activation and Deactivation MAC CEs
6.1.3.56Timing advance report MAC CETiming reportingTiming Advance Command MAC CE
6.1.3.57Differential Koffset MAC CETiming or offset controlPlanned CE page
6.1.3.58BFD-RS indication MAC CEBeam-related controlPlanned CE page
6.1.3.59SP or AP SRS TCI state indication MAC CESRS and TCI controlPlanned CE page
6.1.3.60Serving-cell-set-based SRS TCI state indication MAC CESRS and TCI controlPlanned CE page

IAB, NCR, delay, discard, candidate-cell, assumed-PUSCH, and aggregated positioning control

ClauseMAC CE entryTopic groupCurrent page
6.1.3.61Child IAB-DU restricted beam indication MAC CEIAB beam controlPlanned CE page
6.1.3.62IAB-MT recommended beam indication MAC CEIAB beam controlPlanned CE page
6.1.3.63DL TX power adjustment and desired DL TX power adjustment MAC CEsDL power controlPlanned CE page
6.1.3.64Desired IAB-MT PSD range MAC CEIAB power spectral density controlPlanned CE page
6.1.3.65Timing case indication MAC CETiming mode controlPositioning and Delay MAC CEs
6.1.3.66NCR downlink backhaul link beam indication MAC CENCR beam controlPlanned CE page
6.1.3.67NCR uplink backhaul link beam indication MAC CENCR beam controlPlanned CE page
6.1.3.68NCR access link beam indication MAC CENCR beam controlPlanned CE page
6.1.3.69SL LBT failure MAC CEsSidelink LBT controlSidelink MAC CEs
6.1.3.70Enhanced unified TCI activation or deactivation for joint TCI statesAdvanced unified TCI controlPlanned CE page
6.1.3.71Enhanced unified TCI activation or deactivation for separate TCI statesAdvanced unified TCI controlPlanned CE page
6.1.3.72Delay status report MAC CEDelay reportingPositioning and Delay MAC CEs
6.1.3.73PSI-based SDU discard activation or deactivation MAC CEDiscard controlPlanned CE page
6.1.3.74SL-PRS resource request MAC CESidelink positioning controlSidelink MAC CEs
6.1.3.75LTM cell switch command MAC CECell-switch controlPlanned CE page
6.1.3.76Candidate-cell TCI states activation or deactivation MAC CECandidate cell controlPlanned CE page
6.1.3.77Cross-RRH TCI state indication for UE-specific PDCCHAdvanced TCI controlPlanned CE page
6.1.3.78Single-entry PHR with assumed PUSCH MAC CEAdvanced power reportingPHR MAC CEs
6.1.3.79Multiple-entry PHR with assumed PUSCH MAC CEAdvanced power reportingPHR MAC CEs
6.1.3.80Enhanced SP CSI reporting on PUCCH activation or deactivationEnhanced CSI reporting controlPlanned CE page
6.1.3.81Enhanced single-entry PHR for multiple TRP STx2PAdvanced power reportingPHR MAC CEs
6.1.3.82Enhanced multiple-entry PHR for multiple TRP STx2PAdvanced power reportingPHR MAC CEs
6.1.3.83Aggregated SP positioning SRS activation or deactivation MAC CEPositioning controlPositioning and Delay MAC CEs

FAQ

What is the purpose of the MAC Control Elements index?

It is a quick lookup and navigation page for the MAC CE family, designed to support future detailed references.

Should this page contain full CE theory?

No. The index should stay lean and point outward to the pages where each CE gets useful context.

Why build an index page at all?

As the MAC section grows, a fast inventory page becomes useful alongside the longer concept and procedure pages.

Related Content

  • 5G NR MAC Overview Return to the MAC hub to move sideways into related procedures, reports, and advanced topics.
  • 5G NR Physical Layer Overview PHY context helps explain how MAC decisions turn into real radio behavior and measurements.
  • 5G RRC Hub RRC signaling configures much of the MAC behavior this section later explains in traces.
  • 3GPP Decoder Use the decoder alongside these pages when you want to connect theory with real protocol traces.
  • 5G MAC control elements overview Return to the CE hub for the explanatory overview of the family.
  • 5G MAC procedures index Use the procedure index to see where MAC CEs appear across the broader section.