AMR Mode Command Transmission Options

1
AMR Mode Command Transmission Options

• Antti Toskala
• 3GPP TSG RAN WG1 Chairman
• Nokia Networks

2
AMR mode commands as a separate TrCh

(1)

• Transmitting as any transport channel
• Possibility exists already now in physical layer
  specification
• Problem area Overhead and fitting to low rate
  channels
• Uses 4 transport channels (for AMR)

A cmd B C

TC

Iu

RNC

Iub

BTS

CRC

3
AMR mode commands multiplexed at transcoder level

(2)

A cmd B C

• Multiplexing already at transcoder
• No L1/l2 implications
• Low overhead
• 3 Transport Channels

TC


TC MUX

Iu

RNC

Iub


BTS
CRC

4
Multiplexing at MAC layer

(3)

• Multiplexing done by MAC protocol in RNC
• Problem area Not in-line with the MAC model
• Overhead dependant on the impact to MAC
  structures, like MAC header
• 3 Tranport channels

A cmd B C

TC

Iu

MAC

RNC

MUX

Iub

BTS

CRC

5
Multiplexing at physical layer

• Multiplexing as former 1st multiplexing at
  physical layer
• Low overhead
• Complexity concerns on the L1 multiplexing
  solution
• 4 Transport channels, 3 channels at physical
  layer after 1st multiplexing

(4)

A cmd B C

TC

Iu

RNC

Iub

CRC

BTS

1stMUX

6
AMR Mode Command Multiplexing options Summary



(4)

(1)

(2)

(3)

A cmd B C

A cmd B C

A cmd B C

A cmd B C

TC


TC MUX
Iu

MAC

RNC

MUX

Iub

4 TrCHs

3 TrCHs

3 TrCHs

4 TrCHs

CRC

BTS

CRC

CRC

CRC

1stMUX