Category终端能力等级，表明了终端所支持的数据处理能力（下载、上传速率）、最大的空分复用、调制编码能力等。
详细可参考 3GPP36.306。在R8版本中定义了5类终端，在R10中定义了8类终端....随着版本演进，不断有新的终端被定义！
R8
R9
R10
R11
R12
Category 1
Category 1
Category 1
Category 1
Category 1
Category 2
Category 2
Category 2
Category 2
Category 2
Category 3
Category 3
Category 3
Category 3
Category 3
Category 4
Category 4
Category 4
Category 4
Category 4
Category 5
Category 5
Category 5
Category 5
Category 5
-
-
Category 6
Category 6
Category 6
-
-
Category 7
Category 7
Category 7
-
-
Category 8
Category 8
Category 8
-
-
-
Category 9
Category 9
-
-
-
Category 10
Category 10
-
-
-
Category 11
Category 11
-
-
-
Category 12
Category 12
-
-
-
-
Category 13
-
-
-
-
Category 14
-
-
-
-
Category 15
目前3GPP更新到了R12，15类终端，但还有很多信息没有说清楚！以RC40版本来说，信息如下！
下行物理信道参数设置
UE 类别
Maximum number of DL-SCH transport block bitsreceived within a TTI
Maximum number of bits of a DL-SCH transport blockreceived within a TTI
软信道比特总数
支持下行空分复用的最大层数
Category1
10296
10296
250368
1
Category2
51024
51024
1237248
2
Category3
102048
75376
1237248
2
Category4
150752
75376
1827072
2
Category5
299552
149776
3667200
4
Category6
301504
149776 (4layers)
3654144
2 or4
75376 (2layers)
Category7
301504
149776 (4layers)
3654144
2 or4
75376 (2layers)
Category8
2998560
299856
35982720
8
Category9
452256
149776 (4layers)
5481216
2 or4
75376 (2layers)
Category10
452256
149776 (4layers)
5481216
2 or4
75376 (2layers)
Category11
603008
149776 (4layers, 64QAM)
7308288
2 or4
195816 (4layers, 256QAM)
75376 (2layers, 64QAM)
97896 (2layers, 256QAM)
Category12
603008
149776 (4layers, 64QAM)
7308288
2 or4
195816 (4layers, 256QAM)
75376 (2layers, 64QAM)
97896 (2layers, 256QAM)
上行物理信道参数配置
UECategory
Maximum number of UL-SCH transport block bits transmittedwithin a TTI
Maximum number of bits of an UL-SCH transport blocktransmitted within a TTI
Category1
5160
5160
Category2
25456
25456
Category3
51024
51024
Category4
51024
51024
Category5
75376
75376
Category6
51024
51024
Category7
102048
51024
Category8
1497760
149776
Category9
51024
51024
Category10
102048
51024
Category11
51024
51024
Category12
102048
51024
这里需要说明终端的最大下行速率和最大上行速率
以下行举例来说，有2个参数：
Maximum number of DL-SCH transport block bitsreceived within a TTI
//在一个TTI内可接收的最大DL-SCH传输块bit数
Maximum number of bits of a DL-SCH transport blockreceived within a TT
//在一个TTI内可接收一个传输块的DS-SCH传输块最大bit数
一个TTI就是1ms
举例来说：Category3
Maximum number of DL-SCH transport block bitsreceived within a TTI =102048
那么下行速率可达100Mbps
Maximum number of bits of a DL-SCH transport blockreceived within a TTI =75376
一个传输块的下行速率可达75Mbps
Category3最大可支持2层传输，2个传输块的最大传输速率可达=75376*2=150Mbps
但Maximum number of DL-SCH transport block bitsreceived within a TTI最大速率只有100Mbps，所以Category3最大速率=MIN(Maximum number of DL-SCH transport block bits receivedwithin a TTI, Maximum number of bits of a DL-SCH transport blockreceived within a TTI*层数)=100Mbps
上行所支持的最大速率同样类似
Category
支持的最大层数
最大速率
下行
上行
下行
上行
Category 1
1
1
10
5
Category 2
2
1
50
25
Category 3
2
1
100
50
Category 4
2
1
150
50
Category 5
4
1
300
75
Category 6
2
1
150
50
4
1
300
Category 7
2
？
150
？
4
300
Category 8
8
1
300
150
Category 9
2
1
150
50
4
450
Category 10
2
？
190
？
4
600
Category 11
2
1
190
50
4
600
Category 12
2
？
190
？
4
600
在调制方式方面，下行方向从CAT11开始支持256QAM调制方式，上行方向部分终端已开始支持64QAM了
Category
数据信道支持的调制方式
下行
上行
Category 1
QPSK, 16QAM, 64QAM
QPSK, 16QAM
Category 2
QPSK, 16QAM
Category 3
QPSK, 16QAM
Category 4
QPSK, 16QAM
Category 5
QPSK, 16QAM, 64QAM
Category 6
QPSK, 16QAM
Category 7
QPSK, 16QAM
Category 8
QPSK, 16QAM, 64QAM
Category 9
QPSK, 16QAM
Category 10
QPSK, 16QAM
Category 11
QPSK, 16QAM 64QAM，256QAM
QPSK, 16QAM
Category 12
QPSK, 16QAM
Category 13
QPSK, 16QAM
Category 14
QPSK, 16QAM
Category 15
QPSK, 16QAM, 64QAM
如何查看终端的category呢？可以通过信令来确认，在信令UECapabilityInformation的UE-EUTRA-Capability中有ue-Category的信息。
The IEUE-EUTRA-Capability is used to convey the E-UTRA UE Radio AccessCapability Parameters [5] to the network.
UE-EUTRA-Capability information element
-- ASN1START
UE-EUTRA-Capability::= SEQUENCE {
accessStratumRelease AccessStratumRelease,
ue-Category INTEGER(1..16), -- value range FFS
pdcp-Parameters PDCP-Parameters,
phyLayerParameters PhyLayerParameters,
rf-Parameters RF-Parameters,
measurementParameters MeasurementParameters,
interRAT-Parameters SEQUENCE {
utraFDD IRAT-UTRA-FDD-Parameters OPTIONAL,
utraTDD128 IRAT-UTRA-TDD128-Parameters OPTIONAL,
……
TheUECapabilityInformation message is used to transfer of UEradio access capabilities requested by the E‑UTRAN.
Signalling radio bearer:SRB1
RLC-SAP: AM
Logical channel:DCCH
Direction: UE toE‑UTRAN
UECapabilityInformation message
-- ASN1START
UECapabilityInformation::= SEQUENCE {
rrc-TransactionIdentifier RRC-TransactionIdentifier,
criticalExtensions CHOICE {
c1 CHOICE{
ueCapabilityInformation-r8 UECapabilityInformation-r8-IEs,
spare7 NULL,
spare6 NULL, spare5 NULL, spare4 NULL,
spare3 NULL, spare2 NULL, spare1 NULL
},
criticalExtensionsFuture SEQUENCE {}
}
}
UECapabilityInformation-r8-IEs::= SEQUENCE (SIZE(1..maxRAT-Capabilities)) OF SEQUENCE {
rat-Type RAT-Type,
ueCapabilitiesRAT-Container OCTET STRING,
nonCriticalExtension SEQUENCE{} OPTIONAL
}
-- ASN1STOP
UECapabilityInformation field descriptions
ueCapabilitesRAT-Container
Container forthe UE capabilities of the indicated RAT. The encoding is definedin the specification of each RAT:
For E‑UTRA: the encoding of UE capabilities is defined inIE UE-EUTRA-Capability.
For UTRA: theencoding of UE capabilities is defined in IE [FFS] TS 25.331[19].
For GERAN: theencoding of UE capabilities is defined in IE [FFS] [24.008 and/ or44.018; FFS].
ForCDMA2000-1xRTT Bandclass: the encoding of UE capabilities isdefined in IE [A.S.0008; FFS]
