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TS 36.321 (RAN2)
E-UTRA – Medium Access Control (MAC) protocol specification

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(W-zip) V14.0    2016/09    96 p.
(P) V13.3    2016/09    94 p.
(P) V12.9    2016/03    79 p.
(P) V11.6    2015/03    59 p.
(P) V10.10    2014/01    56 p.
(P) V9.6    2012/03    50 p.
(P) V8.12    2012/03    49 p.

Rapporteur:  Mr. Folke, Mats
See also:  TS 25.321 (UTRA MAC)    

This TS specifies the E-UTRA MAC protocol.

LTE Medium Access Control (MAC) protocol

E-UTRA defines two MAC entities; one in the UE and one in the E-UTRAN. These MAC entities handle the following transport channels:
  • Broadcast Channel (BCH);
  • Downlink Shared Channel(s) (DL-SCH);
  • Paging Channel (PCH);
  • Uplink Shared Channel(s) (UL-SCH);
  • Random Access Channel(s) (RACH);
  • Multicast Channel(s) (MCH).
The exact functions performed by the MAC entities are different in the UE from those performed in the E-UTRAN. The Relay Node includes both MAC entities; one for communication with UEs and one for communication with the E-UTRAN.


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1   Scope [R8]   PDF-p. 7
2   References [R8]
3   Definitions and abbreviations [R8]   PDF-p. 8
4   General [R8]   PDF-p. 11
5   MAC procedures [R8]   PDF-p. 18      Up
5.1   Random Access procedure
5.2   Maintenance of Uplink Time Alignment
5.3   DL-SCH data transfer   PDF-p. 28
5.4   UL-SCH data transfer
5.5   PCH reception   PDF-p. 42
5.6   BCH reception
5.7   Discontinuous Reception (DRX)
5.7a   Discontinuous Reception (DRX) for SC-PTM [R13]   PDF-p. 45      Up
5.8   MAC reconfiguration
5.9   MAC Reset
5.10   Semi-Persistent Scheduling   PDF-p. 46
5.11   Handling of unknown, unforeseen and erroneous protocol data   PDF-p. 47
5.12   MCH reception [R9]
5.13   Activation/Deactivation of SCells [R10]   PDF-p. 48
5.14   SL-SCH Data transfer [R12]   PDF-p. 49
5.15   SL-DCH data transfer [R12]
5.16   SL-BCH data transfer [R12]   PDF-p. 58
6   Protocol Data Units, formats and parameters [R8]
6.1   Protocol Data Units
6.2   Formats and parameters   PDF-p. 75      Up
7   Variables and constants [R8]   PDF-p. 79
A  (Normative)   Handling of measurement gaps [R8]   PDF-p. 84
B  (Normative)   Contention resolution for RACH access [R8]   PDF-p. 85
C   Intended UE behaviour for DRX Timers [R11]   PDF-p. 86
D   Change history   PDF-p. 87

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