添加辅小区

4G 5G添加辅小区都是通过rrcConnectionReconfiguration消息的SCellToAddMod

4G

    +-sCellToReleaseList-r10 ::= SEQUENCE OF OPTIONAL:Omit+-sCellToAddModList-r10 ::= SEQUENCE OF SIZE(1..maxSCell-r10[4]) [1] OPTIONAL:Exist| +-SCellToAddMod-r10 ::= SEQUENCE [111]|   +-sCellIndex-r10 ::= INTEGER (1..7) [1]|   +-cellIdentification-r10 ::= SEQUENCE OPTIONAL:Exist|   | +-physCellId-r10 ::= INTEGER (0..503) [2]|   | +-dl-CarrierFreq-r10 ::= INTEGER (0..maxEARFCN[65535]) [5790]

在TS36.331 中：R10时，最多4个辅载波。 R13 LTE可以有31个辅载波
maxSCell-r10 INTEGER ::= 4 – Maximum number of SCells
maxSCell-r13 INTEGER ::= 31 – Highest value of extended number range of SCells

5G：

5G下也是通过sCellToAddModList添加辅小区。
有时网络会直接通过rrcConnectionReconfiguration分配辅小区。
sCellToAddModList {
{
sCellIndex 1,
sCellConfigCommon {
physCellId 501,
downlinkConfigCommon {
frequencyInfoDL {
absoluteFrequencySSB 627264,
frequencyBandList {
78
},
absoluteFrequencyPointA 626688,
scs-SpecificCarrierList {
{
offsetToCarrier 0,
subcarrierSpacing kHz30,
carrierBandwidth 51
}
}
},

有时会先下发measurement配置，等终端检测到辅小区上报网络后，网络才通知终端添加辅小区：
比如如下消息，网络通过measId 1关联reportConfigId 2，measObjectId 1。
reportConfigId 2 通知A4事件的配置。Event A4 (Neighbor becomes better than threshold) 当相邻小区变得优于定义的阈值时,触发事件A4。
measObjectId 1 下发需要检测的物理频段范围，在这里是freqBandIndicatorNR 78 ，ssbFrequency 621216
a4-Threshold rsrp: 36。
criticalExtensions rrcReconfiguration: {
measConfig {
== measObjectToAddModList {==
{
measObjectId 1,
measObject measObjectNR: {
ssbFrequency 621216,
ssbSubcarrierSpacing kHz30,
smtc1 {
periodicityAndOffset sf20: 0,
duration sf1
},
referenceSignalConfig {
ssb-ConfigMobility {
deriveSSB-IndexFromCell FALSE
}
},
quantityConfigIndex 1,
offsetMO {
},
== freqBandIndicatorNR 78==
}
},
== reportConfigId 2,==
reportConfig reportConfigNR: {
reportType eventTriggered: {
== eventId eventA4: {==
a4-Threshold rsrp: 36,
reportOnLeave FALSE,
hysteresis 0,
timeToTrigger ms0,
useWhiteCellList FALSE
},
rsType ssb,
reportInterval ms120,
reportAmount r1,
reportQuantityCell {
rsrp TRUE,
rsrq TRUE,
sinr TRUE
},
maxReportCells 1,
includeBeamMeasurements FALSE
}
}
}
},
measIdToAddModList {
{
== measId 1,==
== measObjectId 2,==
== reportConfigId 2==
}
},

然后终端发送相关检测结果。这里终端发送measurementReport，measId 1带measResultNeighCells的结果physCellId 501,符合要求。
[3] Measurement Report
{
message c1: measurementReport: {
criticalExtensions measurementReport: {
measResults {
== measId 1,==
measResultServingMOList {
{
servCellId 0,
measResultServingCell {
physCellId 500,
measResult {
cellResults {
resultsSSB-Cell {
rsrp 70,
rsrq 65,
sinr 84
}
}
}
}
}
},
measResultNeighCells measResultListNR: {
{
physCellId 501,
measResult {
cellResults {
resultsSSB-Cell {
== rsrp 67,==
rsrq 65,
sinr 88
}
}
然后网络再通过 rrcReconfiguration下发sCellToAddModList添加辅载波

终端载波聚合能力上报

下面是某终端在中国移动下的载波聚合能力上报

移动NR下面CA组合：

支持主载波band28+辅载波band41. 不支持同一个band内的CA。
因为band28是低频，覆盖广，所以主载波用band28.在小区中心band28和band41同时覆盖的地方可以开启CA。

supportedBandCombinationList 
2.    {
3.      {
4.        bandList 
5.        {
6.          nr : 
7.            {
8.              bandNR 41,
9.              ca-BandwidthClassDL-NR a,
10.              ca-BandwidthClassUL-NR a
11.            }
12.        },
13.        featureSetCombination 0,
14.        powerClass-v1530 pc2
15.      },
16.      {
17.        bandList 
18.        {
19.          nr : 
20.            {
21.              bandNR 28,
22.              ca-BandwidthClassDL-NR a,//主载波band28
23.              ca-BandwidthClassUL-NR a
24.            },
25.          nr : 
26.            {
27.              bandNR 41,
28.              ca-BandwidthClassDL-NR a//辅载波band41
29.            }
30.        },
31.        featureSetCombination 1,
32.        ca-ParametersNR 
33.        {
34.          simultaneousRxTxInterBandCA supported,
35.          diffNumerologyWithinPUCCH-GroupSmallerSCS supported
36.        },
37.        supportedBandwidthCombinationSet '11'B
38.      },
39.      {
40.        bandList 
41.        {
42.          nr : 
43.            {
44.              bandNR 28,
45.              ca-BandwidthClassDL-NR a,
46.              ca-BandwidthClassUL-NR a
47.            }
48.        },
49.        featureSetCombination 2
50.      }
51.    },1. supportedBandCombinationList 
2.    {
3.      {
4.        bandList 
5.        {
6.          nr : 
7.            {
8.              bandNR 41,
9.              ca-BandwidthClassDL-NR a,
10.              ca-BandwidthClassUL-NR a
11.            }
12.        },
13.        featureSetCombination 0,
14.        powerClass-v1530 pc2
15.      },
16.      {
17.        bandList 
18.        {
19.          nr : 
20.            {
21.              bandNR 28,
22.              ca-BandwidthClassDL-NR a,//主载波band28
23.              ca-BandwidthClassUL-NR a
24.            },
25.          nr : 
26.            {
27.              bandNR 41,
28.              ca-BandwidthClassDL-NR a//辅载波band41
29.            }
30.        },
31.        featureSetCombination 1,
32.        ca-ParametersNR 
33.        {
34.          simultaneousRxTxInterBandCA supported,
35.          diffNumerologyWithinPUCCH-GroupSmallerSCS supported
36.        },
37.        supportedBandwidthCombinationSet '11'B
38.      },
39.      {
40.        bandList 
41.        {
42.          nr : 
43.            {
44.              bandNR 28,
45.              ca-BandwidthClassDL-NR a,
46.              ca-BandwidthClassUL-NR a
47.            }
48.        },
49.        featureSetCombination 2
50.      }
51.    },

移动4G下CA组合上报：

Band40带内CA。D 是三载波。所以支持band40带内双载波和三载波聚合。

   supportedBandCombination-r10 
2.          {
3.            {
4.              {
5.                bandEUTRA-r10 40,
6.                bandParametersUL-r10 
7.                {
8.                  {
9.                    ca-BandwidthClassUL-r10 a
10.                  }
11.                },
12.                bandParametersDL-r10 
13.                {
14.                  {
15.                    ca-BandwidthClassDL-r10 a,
16.                    supportedMIMO-CapabilityDL-r10 twoLayers
17.                  }
18.                }
19.              }
20.            },
21.            {
22.              {
23.                bandEUTRA-r10 3,
24.                bandParametersUL-r10 
25.                {
26.                  {
27.                    ca-BandwidthClassUL-r10 a
28.                  }
29.                },
30.                bandParametersDL-r10 
31.                {
32.                  {
33.                    ca-BandwidthClassDL-r10 a,
34.                    supportedMIMO-CapabilityDL-r10 twoLayers
35.                  }
36.                }
37.              }
38.            },
39.            {
40.              {
41.                bandEUTRA-r10 8,
42.                bandParametersUL-r10 
43.                {
44.                  {
45.                    ca-BandwidthClassUL-r10 a
46.                  }
47.                },
48.                bandParametersDL-r10 
49.                {
50.                  {
51.                    ca-BandwidthClassDL-r10 a,
52.                    supportedMIMO-CapabilityDL-r10 twoLayers
53.                  }
54.                }
55.              }
56.            },
57.            {
58.              {
59.                bandEUTRA-r10 41,
60.                bandParametersUL-r10 
61.                {
62.                  {
63.                    ca-BandwidthClassUL-r10 a
64.                  }
65.                },
66.                bandParametersDL-r10 
67.                {
68.                  {
69.                    ca-BandwidthClassDL-r10 a,
70.                    supportedMIMO-CapabilityDL-r10 fourLayers
71.                  }
72.                }
73.              }
74.            },
75.            {
76.              {
77.                bandEUTRA-r10 39,
78.                bandParametersUL-r10 
79.                {
80.                  {
81.                    ca-BandwidthClassUL-r10 a
82.                  }
83.                },
84.                bandParametersDL-r10 
85.                {
86.                  {
87.                    ca-BandwidthClassDL-r10 a,
88.                    supportedMIMO-CapabilityDL-r10 twoLayers
89.                  }
90.                }
91.              }
92.            },
93.            {
94.              {
95.                bandEUTRA-r10 28,
96.                bandParametersUL-r10 
97.                {
98.                  {
99.                    ca-BandwidthClassUL-r10 a
100.                  }
101.                },
102.                bandParametersDL-r10 
103.                {
104.                  {
105.                    ca-BandwidthClassDL-r10 a,
106.                    supportedMIMO-CapabilityDL-r10 twoLayers
107.                  }
108.                }
109.              }
110.            },
111.            {
112.              {
113.                bandEUTRA-r10 38,
114.                bandParametersUL-r10 
115.                {
116.                  {
117.                    ca-BandwidthClassUL-r10 a
118.                  }
119.                },
120.                bandParametersDL-r10 
121.                {
122.                  {
123.                    ca-BandwidthClassDL-r10 a,
124.                    supportedMIMO-CapabilityDL-r10 fourLayers
125.                  }
126.                }
127.              }
128.            },//上面都是一个DL单载波，和一个UL单载波，所以不是载波聚合的能力。分别是单载波的 
129.               //band40,3,8,41,39，28,38
130.            {
131.              {
132.                bandEUTRA-r10 40,
133.                bandParametersUL-r10 
134.                {
135.                  {
136.                    ca-BandwidthClassUL-r10 a
137.                  }
138.                },
139.                bandParametersDL-r10 
140.                {
141.                  {
142.                    ca-BandwidthClassDL-r10 a,///
143.                    supportedMIMO-CapabilityDL-r10 twoLayers
144.                  }
145.                }
146.              },
147.              {
148.                bandEUTRA-r10 40,
149.                bandParametersDL-r10 
150.                {
151.                  {
152.                    ca-BandwidthClassDL-r10 a,///band40带内不连续双载波
153.                    supportedMIMO-CapabilityDL-r10 twoLayers
154.                  }
155.                }
156.              }
157.            },
158.            {
159.              {
160.                bandEUTRA-r10 40,
161.                bandParametersUL-r10 
162.                {
163.                  {
164.                    ca-BandwidthClassUL-r10 a
165.                  }
166.                },
167.                bandParametersDL-r10 
168.                {
169.                  {
170.                    ca-BandwidthClassDL-r10 c,//双载波
171.                    supportedMIMO-CapabilityDL-r10 twoLayers
172.                  }
173.                }
174.              }
175.            },
176.            {
177.              {
178.                bandEUTRA-r10 40,
179.                bandParametersUL-r10 
180.                {
181.                  {
182.                    ca-BandwidthClassUL-r10 a
183.                  }
184.                },
185.                bandParametersDL-r10 
186.                {
187.                  {
188.                    ca-BandwidthClassDL-r10 d,//三载波
189.                    supportedMIMO-CapabilityDL-r10 twoLayers
190.                  }
191.                }
192.              }
193.            }
194.          }//从上述可以看到载波聚合能力只支持band40的带内双载波和三载波。带内双载波支持连续和不
195.           //连续，三载波只支持带内三载波。

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