本文主要是介绍LTE category New，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
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！
| 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) |
| 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
那么下行速率可达100Mbps
Maximum number of bits of a DL-SCH transport blockreceived within a TTI
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 | |||
| 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 | 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。
– UE-EUTRA-Capability
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::=
……
– UECapabilityInformation
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::=
}
UECapabilityInformation-r8-IEs::=
}
-- 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; |
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