1. Summary of Offline Discussion on RMSI CORESET Configuration (Part 2)
3GPP TSG RAN WG1#91 R1-17XXXXX
Reno, USA, November 27th – December 1st, 2017
Agenda item:
Summary of Offline Discussion on RMSI CORESET Configuration (Part 2)
Samsung

2. Background
For Pattern 2

3. Background
For Pattern 3

4. Proposal 1
When the SS/PBCH blocks and corresponding RMSI CORESETs occur in different time instances, NR supports the configuration where the RMSI CORESET monitoring window associated with the SS/PBCH block SSB_i in a burst set is defined as follows:
 The RMSI CORESET monitoring window duration with RMSI numerology is 2 slots;
 The starting slot index S with RMSI numerology for the monitoring window of SSB_i, referring to the SFN boundary, is determined by
 S = X*n + O*n + f(i)
 where
n = (SSB SCS/15 kHz)
X = 0 if the SSB_i is allocated in the first half frame of a radio frame; and X = 5, if the SSB_i is allocated in the second half frame of a radio frame
O can be configured as {0, 2, 5} when SSB SCS is 15kHz or 30kHz; and configured as {0, 2.5, 5} when SSB SCS is 120kHz or 240kHz
Alt1: f(i) = floor(i/N),
i is the SSB index of SSB_i
Alt2: f(i) = floor(i*M)
M equals 1/2, if N=2; M = 1 or 2, if N=1;
N is the number of search space sets per slot, which can be configured as {1, 2}
 The starting symbol R for the RMSI CORESET monitoring window is determined as follows
For the 30kHz SSB SCS/15kHz RMSI SCS LTE-NR coexistence case, R = 2;
For other cases,
when N = 1, R = 0
when N = 2, R is obtained with one of the following options:
Option 1: R={0,l} where l={1,2} is the CORESET duration
Option 2: {0,7}
 The number of RMSI search space sets to monitor is at most one per SSB within duration of 14 symbols with RMSI numerology.
  Need to have only one option before submit for online approval
 How does the UE know which option to use?

5. Proposal 2 For Pattern 1 Configuration Index Group offset O (msec)
Number of search space sets per slot N
Starting OFDM symbol index
(note: l is CORESET duration)
For the combination of SS SCS = 30 kHz and RMSI CORESET SCS = 15 kHz, for the coexistence case
0000 1
l = {1,2,3}
0001 2
l = {1,2}
0010
{1,1+I}
l = {1}
0011
{2,2+I}
0100
{2,4+I}
0101
0110
0111
1000
1001
1010 5
1011
1100
1101
1110
1111
Reserved

6. Proposal 3
For Pattern 2, and for the combination of SS SCS = 120 kHz and RMSI CORESET SCS = 60 kHz
Configuration Index
Group offset O (msec)
Number of search space sets per slot N
Starting OFDM symbol index
(note: l is CORESET duration;
i is SSB index,
k = 0, 1, … 15)
0000
Depends on the number of SSBs in a slot in RMSI numerology
0, 1, 6, 7
for i = 4k, 4k+1, 4k+2, 4k+3
0001
0010
0011
0100
0101
0110
For the combination of SS SCS = 30 kHz and RMSI CORESET SCS = 15 kHz, for the coexistence case
0111
1000
1001
1010
1011
1100
1101
1110
1111

7. Proposal 4
For Pattern 2, and for the combination of SS SCS = 240 kHz and RMSI CORESET SCS = 120 kHz
Configuration Index
Group offset O (msec)
Number of search space sets per slot N
Starting OFDM symbol index
(note: l is CORESET duration;
i is SSB index,
k = 0, 1, … 15)
0000
Depends on the number of SSBs in a slot in RMSI numerology
0, 1, 2 in the same slot as the SSB is mapped for i = 8k, 8k+1, 8k+2;
3,12,13,0,1 in in the previous slot where the SSB is mapped for 8k+3, 8k+4,8k+5,8k+6,8k+7
0001
0010
0011
0100
0101
0110
For the combination of SS SCS = 30 kHz and RMSI CORESET SCS = 15 kHz, for the coexistence case
0111
1000
1001
1010
1011
1100
1101
1110
1111

8. Proposal 5
For Pattern 3, and for the combination of SS SCS = 120 kHz and RMSI CORESET SCS = 120 kHz
Configuration Index
Group offset O (msec)
Number of search space sets per slot N
Starting OFDM symbol index
(note: l is CORESET duration;
i is SSB index,
k = 0, 1, … 15)
0000 2
4, 8, 2, 6
for i = 4k, 4k+1, 4k+2, 4k+3
0001
0010
0011
0100
0101
0110
For the combination of SS SCS = 30 kHz and RMSI CORESET SCS = 15 kHz, for the coexistence case
0111
1000
1001
1010
1011
1100
1101
1110
1111