Wireless Oom » srnc

How many instances of MAC for UE and Network?

wirelessoom — Sat, 31 Oct 2009 06:34:08 +0000

There is a single MAC instance within the UE.

In the network, usually a single MAC instance for each UE exists.
However, multiple MAC instances for a single UE may happen (e.g., one in a CRNC and one in an SRNC)

What is S-RNTI?

wirelessoom — Sun, 26 Jul 2009 16:19:17 +0000

S-RNTI is assigned by the SRNC.

It is uniquely identified within the SRNC.

It is 20 bits.

This id is used by UE, SRNC, DRNC.

UE location in Cell_DCH

wirelessoom — Sun, 26 Jul 2009 14:47:49 +0000

In the Cell_DCH, the UE location is known to

1. cell level by the UTRAN

2. serving RNC by the CN

What is active set?

wirelessoom — Tue, 23 Jun 2009 05:00:33 +0000

Active set is the set of cells to which the UE is simultaneously connected during soft handover.

SRNC vs DRNC

wirelessoom — Fri, 19 Jun 2009 06:20:03 +0000

Due to soft handover, the classification of SRNC and DRNC occurs:

1. SRNC: Serving Radio Network Controller

2. DRNC: Drift Radio Network Controller

SRNC is the RNC which combines signals from multiple node Bs and sends them to CN (SGSN for PS, MSC for CS).