前言：
接 [移动通讯]【Carrier Aggregation in LTE】【 Theory + Log analysis-1】
这里面 主要讲解一下日志分析
目录：
- 总体流程
- UE Capbaility Information
- MeasurementReport
- RRC Connection Reconfiguration
- RRCConnectionReconfigurationComplete
- MAC层作用
- 物理层作用
一 总体流程
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-1.png)
二 UE Capbaility Information
2.1 主要参数
| 主要参数 |
| accessStatumRelease |
| ue-category: |
| supporteBbandList |
| supportedBandcombination_r10 |
| featureGroupRel10 |
| supportedbandwidthcombinationset |
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-2.png)
2.2 accessStatumRelease
接入层协议版本,10
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-3.png)
2.3 UE-category:
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-4.png)
我这边是4：
Max.data rate(DL/UL): 150/50
Support for 64QAM: No
2.4 supporteBbandList:
支持的band 1:3:38:39:40:41
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-5.png)
2.4 supportedBandcombination_r10
结合前面讲过intra_band，inter_band三种场景
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-6.png)
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-7.png)
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-8.png)
2.5 featureGroupRel10
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-9.png)
| FGI bits |
作用 |
前提 |
| 111 |
Measurement reporting trigger Event A6 |
UE 支持 CA |
| 112 |
Scell addition within the Handover to EUTRA procedure |
|
| 113 |
Trigger type 0 SRS(periodic SRS) transmission on X serving cells. X =number of supported component carriers in a given band combination |
2.6 supportedbandwidthcombinationset
3GPP TS 38.306
supportedBandwidthCombinationSet Defines the supported bandwidth combination for the band combination set as defined in the TS 38.101-1 [2], TS 38.101-2 [3] and TS 38.101-3 [4]. Field encoded as a bit map, where bit N is set to "1" if UE support Bandwidth Combination Set N for this band combination as defined in the TS 38.101-1 [2], TS 38.101-2 [3] and TS 38.101-3 [4]. The leading / leftmost bit (bit 0) corresponds to the Bandwidth Combination Set 0, the next bit corresponds to the Bandwidth Combination Set 1 and so on.
最左边的比特（比特0）对应于带宽组合集0，下一个比特对应于带宽合并集1，依此类推
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-10.png)
三 UL_DCCH / MeasurementReport
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-11.png)
UE 上报需要测量小区的信号质量,这里面包含
主小区 以及 辅小区。
基于上述测量包括，NodeB 决定添加小区199 为SCG
四 RRC Connection Reconfiguration
网络下发RRC Reconfiguration OTA 信令至终端，
里面包含很多MAC 层需要配置的参数，例如BSR
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-12.png)
mac :BSR,PHR
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-13.png)
其中最重要的参数 ScellToAddModList, 里面可以看到CA 的小区ID, dl_carrierFreq
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-14.png)
里面下发的消息包括两种类型，common 和Dedicated ，common 针对所有手机
Dedicated 只针对该手机
五 RRCConnectionReconfigurationComplete
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-15.png)
收到这个OTA 消息后，代表该SCG 添加成功了，但是SCG 依然处于
deactivate state, 需要通过MAC 层传输数据进行激活。
六 MAC 层作用
6.1 无 CA 场景数据传输
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-16.png)
1 解码 PDCCH 里面的DCI 信息
2 根据DCI 里面的信息，解码PDSCH 下行传输数据
3 根据DCI 里面的SR(Scheduling grant information) 等信息，在上行PUSCH 上面
发送数据。
6.2 cA 场景
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-17.png)
PSS 和 SSS 独立， 不同小区在不同的PDCCH 独立传输 DCI,
然后独立解码，传输
问题：
PDCCH 是控制信道，相对于PDSCH 需要更高的功率，如果UE 收到多个Secondary cell 的
数据, 可能会导致PDCCH 上面的干扰 。inter-cell interfence
解决方案
6.3. Cross Carrier scheduling
通过Cross Carrier Scheduling 方案，只在PSS 上面发送DCI,
这是一种可选方案，通过CIF 标志位区分。
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-18.png)
owen-r10:
secondary cell will use it's own PDCCH DCI
other-r10:
secondary cell need to decode PDCCH from other cell to get DCI format
6.4 Role MAC layer in CA
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-19.png)
MAC 层针对不同的Cell 映射不同的HARQ entitly
6.5 Reports BSR for Secondary cell
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-20.png)
6.6 Resport PHR
36.321
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-21.png)
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-22.png)
6.7 sCellDeactivationTimer
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-23.png)
6.8 Aggregates data from multiple cells
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-24.png)
七 物理层在CA 方案中的作用
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-25.png)
![[移动通讯]【Carrier Aggregation in LTE】【 Log analysis-2】,网络](https://imgs.yssmx.com/Uploads/2023/09/695796-26.png)
参考：
[移动通讯]【Carrier Aggregation in LTE】【 Theory + Log analysis-1】
CSDN文章来源：https://www.toymoban.com/news/detail-695796.html
《Carrier Aggregation in LTE - Theory + Log analysis》 《LTE Video Tutoria》文章来源地址https://www.toymoban.com/news/detail-695796.html
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