CQI and PMI offset for unlicensed EMTC transmission
An apparatus and method for CSI reporting in the unlicensed band are described. CRS-RSs are transmitted from a RAN in narrowband data channels in the unlicensed band to an eMTC UE. The UE determines the CQI and PMI from the CRS-RSs and transmits a periodic CSI report to the RAN that contains the CQI and PMI. The periodic CSI report is received at a n sf rel th subframe of a n mframe th mframe, where n mframe satisfies n mframe mod N pd,mframe =N OFFSET,mframe where N mframe is a reporting period in terms of mframes and N OFFSET,mframe is a reporting period offset in terms of mframes, and n sf rel satisfies n sf rel −20=N OFFSET,CQI where N OFFSET,CQI is a reporting period offset in subframes.
1. An apparatus of an enhanced Machine Type Communication (eMTC) user equipment (UE), comprising:
processing circuitry arranged to:
decode cell-specific reference signals (CRS-RSs) from a base station in narrowband channels in an unlicensed band;
determine a Channel Quality Indicator (CQI) and Precoding Matrix Index (PMI) from the CRS-RSs; and
generate, for transmission to the base station in the unlicensed band, a periodic Channel State Information (CSI) report containing the CQI and PMI, the periodic CSI report generated at a n sf rel th subframe of a n mframe th mframe, where n mframe satisfies:
n mframe mod N pd,mframe =N OFFSET,mframe
where N pd, mframe is a reporting period in terms of mframes and N OFFSET,mframe is a reporting period offset in terms of mframes, and n sf rel satisfies:
n sf rel −20= N OFFSET,CQI
where N OFFSET,CQI is a reporting period offset in subframes; and
a memory configured to store N pd, mframe , N OFFSET, mframe N OFFSET,CQI .
2. The apparatus of claim 1 , wherein a reporting period of the periodic CSI report comprises 80*2 n ms, where n=0-5.
3. The apparatus of claim 2 , wherein:
a CQI configuration for a reporting period of 80 ms and 160 ms includes:
Value of
Value of
mframe offset
I CQI/PMI
N pd,mframe
N OFFSET,CQI
N OFFSET,mframe
0 ≤ I CQI/PMI ≤ 59
1
I CQI/PMI
0
60 ≤ I CQI/PMI ≤ 119
2
I CQI/PMI -60
0
120 ≤ I CQI/PMI ≤ 179
2
I CQI/PMI -120
1.
4. The apparatus of claim 2 , wherein:
a CQI configuration for a reporting period of 320 ms includes:
Value of
Value of
mframe offset
I CQI/PMI
N pd,mframe
N OFFSET,CQI
N OFFSET,mframe
180 ≤ I CQI/PMI ≤ 239
4
I CQI/PMI -180
0
240 ≤ I CQI/PMI ≤ 299
4
I CQI/PMI -240
1
300 ≤ I CQI/PMI ≤ 359
4
I CQI/PMI -300
2
360 ≤ I CQI/PMI ≤ 419
4
I CQI/PMI -360
3.
5. The apparatus of claim 2 , wherein:
a CQI configuration for a reporting period of 640 ms includes:
Value of
Value of
mframe offset
I CQI/PMI
N pd,mframe
N OFFSET,CQI
N OFFSET,mframe
420 ≤ I CQI/PMI ≤ 479
8
I CQI/PMI -420
0
480 ≤ I CQI/PMI ≤ 539
8
I CQI/PMI -480
2
540 ≤ I CQI/PMI ≤ 599
8
I CQI/PMI -540
4
600 ≤ I CQI/PMI ≤ 659
8
I CQI/PMI -600
6.
6. The apparatus of claim 2 , wherein:
a CQI configuration for a reporting period of 1280 ms includes:
Value of
Value of
mframe offset
I CQI/PMI
N pd,mframe
N OFFSET,CQI
N OFFSET,mframe
660 ≤ I CQI/PMI ≤ 719
8
I CQI/PMI -660
0
720 ≤ I CQI/PMI ≤ 779
8
I CQI/PMI -720
4
780 ≤ I CQI/PMI ≤ 839
8
I CQI/PMI -780
8
840 ≤ I CQI/PMI ≤ 899
8
I CQI/PMI -840
12.
7. The apparatus of claim 2 , wherein:
a CQI configuration for a reporting period of 2560 ms includes:
Value of
Value of
mframe offset
I CQI/PMI
N pd,mframe
N OFFSET,CQI
N OFFSET,mframe
900 ≤ I CQI/PMI ≤ 959
32
I CQI/PMI -900
0.
8. The apparatus of claim 1 , wherein the periodic CSI report is transmitted in a physical uplink control channel (PUCCH) in at least one narrowband data channel of the unlicensed band, the narrowband data channel selected in accordance with frequency hopping information stored in the memory.
9. The apparatus of claim 8 , wherein a CQI configuration has a nesting structure in which the CQI and PMI share a common PUCCH pool where a PUCCH occasion of a larger period overlaps with a PUCCH occasion of a shorter period.
10. The apparatus of claim 9 , wherein the CQI configuration includes:
Value of
Value of
mframe offset
I CQI/PMI
N pd,mframe
N OFFSET,CQI
N OFFSET,mframe
0 ≤ I CQI/PMI ≤ 59
1
I CQI/PMI
0
60 ≤ I CQI/PMI ≤ 119
2
I CQI/PMI -60
0
120 ≤ I CQI/PMI ≤ 179
2
I CQI/PMI -120
1
180 ≤ I CQI/PMI ≤ 239
4
I CQI/PMI -180
0
240 ≤ I CQI/PMI ≤ 299
4
I CQI/PMI -240
1
300 ≤ I CQI/PMI ≤ 359
4
I CQI/PMI -300
2
360 ≤ I CQI/PMI ≤ 419
4
I CQI/PMI -360
3
420 ≤ I CQI/PMI ≤ 479
8
I CQI/PMI -420
0
480 ≤ I CQI/PMI ≤ 539
8
I CQI/PMI -480
2
540 ≤ I CQI/PMI ≤ 599
8
I CQI/PMI -540
4
600 ≤ I CQI/PMI ≤ 659
8
I CQI/PMI -600
6
660 ≤ I CQI/PMI ≤ 719
16
I CQI/PMI -660
0
720 ≤ I CQI/PMI ≤ 779
16
I CQI/PMI -720
4
780 ≤ I CQI/PMI ≤ 839
16
I CQI/PMI -780
8
840 ≤ I CQI/PMI ≤ 899
16
I CQI/PMI -840
12
900 ≤ I CQI/PMI ≤ 959
32
I CQI/PMI -900
0.
11. The apparatus of claim 1 , wherein:
the processing circuitry comprises a baseband processor configured to encode transmissions to, and decode transmissions from, the base station.
12. A non-transitory machine-readable storage device including instructions stored thereon that, when executed by an enhanced Machine Type Communication (eMTC) user equipment (UE), configure the eMTC UE to perform operations comprising:
receive cell-specific reference signals (CRS-RSs) from a radio access network (RAN) in an unlicensed band;
determine a Channel Quality Indicator (CQI) and Precoding Matrix Index (PMI) from the CRS-RSs;
determine, from a frequency hopping sequence, a data channel in the unlicensed band; and
transmit, to the RAN in a physical uplink control channel (PUCCH) of the data channel, a periodic Channel State Information (CSI) report, the CSI report containing the CQI and PMI, the periodic CSI report generated at a n sf rel th subframe of a n mframe th mframe, where n mframe satisfies:
n mframe mod N pd,mframe =N OFFSET,mframe
where N pd, mframe is a reporting period in terms of mframes and N OFFSET, mframe is a reporting period offset in terms of mframes, and n sf rel satisfies:
n sf rel −20= N OFFSET,CQI
where N OFFSET,CQI is a reporting period offset in subframes.
13. The medium of claim 12 , wherein:
a CQI configuration for a reporting period of 80 ms and 1.60 ms includes:
Value of
Value of
mframe offset
I CQI/PMI
N pd,mframe
N OFFSET,CQI
N OFFSET,mframe
0 ≤ I CQI/PMI ≤ 59
1
I CQI/PMI
0
60 ≤ I CQI/PMI ≤ 119
2
I CQI/PMI -60
0
120 ≤ I CQI/PMI ≤ 179
2
I CQI/PMI -120
1.
14. The medium of claim 12 , wherein:
a CQI configuration for a reporting period of 320 ms includes:
Value of
Value of
mframe offset
I CQI/PMI
N pd,mframe
N OFFSET,CQI
N OFFSET,mframe
180 ≤ I CQI/PMI ≤ 239
4
I CQI/PMI -180
0
240 ≤ I CQI/PMI ≤ 299
4
I CQI/PMI -240
1
300 ≤ I CQI/PMI ≤ 359
4
I CQI/PMI -300
2
360 ≤ I CQI/PMI ≤ 419
4
I CQI/PMI -360
3.
15. The medium of claim 12 , wherein:
a CQI configuration for a reporting period of 640 ms includes:
Value of
Value of
mframe offset
I CQI/PMI
N pd,mframe
N OFFSET,CQI
N OFFSET,mframe
420 ≤ I CQI/PMI ≤ 479
8
I CQI/PMI -420
0
480 ≤ I CQI/PMI ≤ 539
8
I CQI/PMI -480
2
540 ≤ I CQI/PMI ≤ 599
8
I CQI/PMI -540
4
600 ≤ I CQI/PMI ≤ 659
8
I CQI/PMI -600
6.
16. The medium of claim 12 , wherein:
a CQI configuration for a reporting period of 1280 ms and 2560 ms includes:
Value of
Value of
mframe offset
I CQI/PMI
N pd,mframe
N OFFSET,CQI
N OFFSET,mframe
660 ≤ I CQI/PMI ≤ 719
16
I CQI/PMI -660
0
720 ≤ I CQI/PMI ≤ 779
16
I CQI/PMI -720
4
780 ≤ I CQI/PMI ≤ 839
16
I CQI/PMI -780
8
840 ≤ I CQI/PMI ≤ 899
16
I CQI/PMI -840
12
900 ≤ I CQI/PMI ≤ 959
32
I CQI/PMI -900
0.
17. The medium of claim 12 , wherein a CQI configuration has a nesting structure in which the CQI and PMI share a common PUCCH pool where a PUCCH occasion of a larger period overlaps with a PUCCH occasion of a shorter period.
18. The apparatus of claim 17 , wherein the CQI configuration includes:
Value of
Value of
mframe offset
I CQI/PMI
N pd,mframe
N OFFSET,CQI
N OFFSET,mframe
0 ≤ I CQI/PMI ≤ 59
1
I CQI/PMI
0
60 ≤ I CQI/PMI ≤ 119
2
I CQI/PMI -60
0
120 ≤ I CQI/PMI ≤ 179
2
I CQI/PMI -120
1
180 ≤ I CQI/PMI ≤ 239
4
I CQI/PMI -180
0
240 ≤ I CQI/PMI ≤ 299
4
I CQI/PMI -240
1
300 ≤ I CQI/PMI ≤ 359
4
I CQI/PMI -300
2
360 ≤ I CQI/PMI ≤ 419
4
I CQI/PMI -360
3
420 ≤ I CQI/PMI ≤ 479
8
I CQI/PMI -420
0
480 ≤ I CQI/PMI ≤ 539
8
I CQI/PMI -480
2
540 ≤ I CQI/PMI ≤ 599
8
I CQI/PMI -540
4
600 ≤ I CQI/PMI ≤ 659
8
I CQI/PMI -600
6
660 ≤ I CQI/PMI ≤ 719
16
I CQI/PMI -660
0
720 ≤ I CQI/PMI ≤ 779
16
I CQI/PMI -720
4
780 ≤ I CQI/PMI ≤ 839
16
I CQI/PMI -780
8
840 ≤ I CQI/PMI ≤ 899
16
I CQI/PMI -840
12
900 ≤ I CQI/PMI ≤ 959
32
I CQI/PMI -900
0.
19. An apparatus of radio access network (RAN) node, comprising:
processing circuitry arranged to:
encode cell-specific reference signals (CRS-RSs) for transmission in narrowband data channels in an unlicensed band to an enhanced Machine Type Communication (eMTC) user equipment (UE);
decode, from the eMTC UE in a physical uplink control channel (PUCCH) in one of the narrowband data channels, a periodic Channel State Information (CSI) report containing a Channel Quality Indicator (CQI) and Precoding Matrix Index (PMI) determined from the CRS-RSs, the periodic CSI report received at a n sf rel th subframe of a n mframe th mframe, where n mframe satisfies:
n mframe mod N pd,mframe =N OFFSET,mframe
where N pd, mframe is a reporting period in terms of mframes and N OFFSET,mframe is a reporting period offset in terms of mframes, and n sf rel satisfies:
n sf rel −20= N OFFSET,CQI
where N OFFSET,CQI is a reporting period offset in subframes; and
a memory configured to store the CSI report.
20. The apparatus of claim 19 , wherein a CQI configuration has a nesting structure in which the CQI and PMI share a common PUCCH pool Where a PUCCH occasion of a larger period overlaps with a PUCCH occasion of a shorter period.
21. The apparatus of claim 20 , wherein the CQI configuration includes:
Value of
Value of
mframe offset
I CQI/PMI
N pd,mframe
N OFFSET,CQI
N OFFSET,mframe
0 ≤ I CQI/PMI ≤ 59
1
I CQI/PMI
0
60 ≤ I CQI/PMI ≤ 119
2
I CQI/PMI -60
0
120 ≤ I CQI/PMI ≤ 179
2
I CQI/PMI -120
1
180 ≤ I CQI/PMI ≤ 239
4
I CQI/PMI -180
0
240 ≤ I CQI/PMI ≤ 299
4
I CQI/PMI -240
1
300 ≤ I CQI/PMI ≤ 359
4
I CQI/PMI -300
2
360 ≤ I CQI/PMI ≤ 419
4
I CQI/PMI -360
3
420 ≤ I CQI/PMI ≤ 479
8
I CQI/PMI -420
0
480 ≤ I CQI/PMI ≤ 539
8
I CQI/PMI -480
2
540 ≤ I CQI/PMI ≤ 599
8
I CQI/PMI -540
4
600 ≤ I CQI/PMI ≤ 659
8
I CQI/PMI -600
6
660 ≤ I CQI/PMI ≤ 719
16
I CQI/PMI -660
0
720 ≤ I CQI/PMI ≤ 779
16
I CQI/PMI -720
4
780 ≤ I CQI/PMI ≤ 839
16
I CQI/PMI -780
8
840 ≤ I CQI/PMI ≤ 899
16
I CQI/PMI -840
12
900 ≤ I CQI/PMI ≤ 959
32
I CQI/PMI -900
0.