Radio Link Control

From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by Kahtar (talk | contribs) at 16:37, 1 December 2016 (v1.41 - WP:WCW project (Heading should end with "=" - Heading should begin with "=")). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Radio link control (RLC) is a layer 2 protocol used in UMTS and LTE on the Air interface. This protocol is specified by 3GPP in [1] for UMTS and [2] for LTE. RLC is located on top of the 3GPP MAC-layer and below the PDCP-layer. The main tasks of the RLC protocol are:

  • Transfer of upper layer Protocol Data Units (PDUs) in one of three modes: Acknowledged Mode (AM), Unacknowledged Mode (UM) and Transparent Mode (TM)
  • Error correction through ARQ (only for AM data transfer)
  • Concatenation, segmentation and reassembly of RLC SDUs (UM and AM)
  • Re-segmentation of RLC data PDUs (AM)
  • Reordering of RLC data PDUs (UM and AM);
  • Duplicate detection (UM and AM);
  • RLC SDU discard (UM and AM)
  • RLC re-establishment
  • Protocol error detection and recovery

RLC features specific to LTE only - 1) Re-segmentation. 2) RLC SDU discard is notified by upper layer.

References

  1. ^ 3GPP TS 25.322 Radio Link Control (RLC) protocol specification
  2. ^ 3GPP TS 36.322 Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Link Control (RLC) protocol specification
Retrieved from "https://en.wikipedia.org/w/index.php?title=Radio_Link_Control&oldid=752499959"