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LTE ue-Category

Last Update August, 2016

Category information is used to allow the eNB to communicate effectively with all the UEs connected to it.  The ue-Category defines a combined uplink and downlink capability as specified in 3GPP TS36.306.

  • DL-SCH = Downlink shared channel
  • UL-SCH = Uplink shared channel
  • TTI = Transmission Time Interval

Downlink physical layer parameter values set by the field ue-Category (36.306 table 4.1-1):

UE Category

Maximum number of DL-SCH transport block bits received within a TTI (Note 1)

Maximum number of bits of a DL-SCH transport block received within a TTI

Total number of soft channel bits

Maximum number of supported layers for spatial multiplexing in DL

Category 1

10296

10296

250368

1

Category 2

51024

51024

1237248

2

Category 3

102048

75376

1237248

2

Category 4

150752

75376

1827072

2

Category 5

299552

149776

3667200

4

Category 6

301504

149776 (4 layers, 64QAM)

75376 (2 layers, 64QAM)

3654144

2 or 4

Category 7

301504

149776 (4 layers, 64QAM)

75376 (2 layers, 64QAM)

3654144

2 or 4

Category 8

2998560

299856

35982720

8

Category 9

452256

149776 (4 layers, 64QAM)

75376 (2 layers, 64QAM)

5481216

2 or 4

Category 10

452256

149776 (4 layers, 64QAM)

75376 (2 layers, 64QAM)

5481216

2 or 4

Category 11

603008

149776 (4 layers, 64QAM)

195816 (4 layers, 256QAM)

75376 (2 layers, 64QAM)

97896 (2 layers, 256QAM)

7308288

2 or 4

Category 12

603008

149776 (4 layers, 64QAM)

195816 (4 layers, 256QAM)

75376 (2 layers, 64QAM)

97896 (2 layers, 256QAM)

7308288

2 or 4

NOTE 1:    In carrier aggregation operation, the DL-SCH processing capability can be shared by the UE with that of MCH received from a serving cell. If the total eNB scheduling for DL-SCH and an MCH in one serving cell at a given TTI is larger than the defined processing capability, the prioritization between DL-SCH and MCH is left up to UE implementation.

 

 

Uplink physical layer parameter values set by the field ue-Category (36.306 table 4.1-2):

UE Category

Maximum number of UL-SCH transport block bits transmitted within a TTI

Maximum number of bits of an UL-SCH transport block transmitted within a TTI

Support for 64QAM in UL

Category 1

5160

5160

No

Category 2

25456

25456

No

Category 3

51024

51024

No

Category 4

51024

51024

No

Category 5

75376

75376

Yes

Category 6

51024

51024

No

Category 7

102048

51024

No

Category 8

1497760

149776

Yes

Category 9

51024

51024

No

Category 10

102048

51024

No

Category 11

51024

51024

No

Category 12

102048

51024

No

Further Reading:

“…LTE utilises UE or User Equipment categories or classes to define the performance specifications an enable base stations to be able to communicate effectively with them knowing their performance levels”….Read the article

“…Independent from the LTE-Advanced technology components, new UE categories 6, 7 and 8 are added into LTE Release 10…These categories describe to a certain extend the devices capabilities. For instance categories 6 and 7 support MIMO 2x2 and/or 4x4 and go up to data rates of 300 Mbps. Whereas category 8 is the highest category, supporting 8x8 MIMO leading to a peak data rate of 3 Gbps, if the maximum of five component carriers are aggregated. Uplink category 8 leads to 1.5 Gbps data rate using 4x4 MIMO and 64QAM modulation…”…Download the White Paper

 

 

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