R1/S4 meeting, Paris France AMR Mode Command Transmission Options Antti Toskala 3GPP TSG RAN WG1 Chairman Nokia Networks

R1/S4 meeting, Paris France AMR mode commands as a separate TrCh 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) CRC TC RNC BTS (1) A cmd B C Iu Iub

R1/S4 meeting, Paris France AMR mode commands multiplexed at transcoder level Multiplexing already at transcoder No L1/l2 implications Low overhead 3 Transport Channels TC RNC BTS A cmd B C Iu Iub (2) CRC TC MUX

R1/S4 meeting, Paris France Multiplexing at MAC layer 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 TC RNC BTS Iu Iub MAC MUX A cmd B C (3) CRC

R1/S4 meeting, Paris France 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 TC RNC BTS Iu Iub 1stMUX (4) A cmd B C CRC

R1/S4 meeting, Paris France AMR Mode Command Multiplexing options: Summary CRC MAC MUX 1stMUX (4) TC RNC BTS (1) A cmd B C (2) (3) Iu Iub CRC 4 TrCHs 3 TrCHs 4 TrCHs TC MUX