Mr Kang
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SRB意为无线信令承载,其定义为RBs,仅用于传输RRC和NAS信息;3GPP TS38.331中对5G(NR)网络中的SRB定义有四种类型:整理:kangguoying,20200528
5G(NR)网络中除SRB3外,其他与LTE相同;在EN-DC中SRB3用于UE与SgNB之间通过NR无线接口传递RRC信息;整理:kangguoying,20200528
SRB的默认配置整理:kangguoying,20200528
Information Element | SRB#1 | SRB#2 | SRB#3 | PDCP-Config/PDCP配置 |
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| t-Reordering/重新排序 | Infinite | Infinite | Infinite | RLC-Config CHOICE/RLC配置选择:kangguoying,20200528 | AM | AM | AM | ul-RLC-Config/上行RLC配置 |
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| sn-FieldLength/SN字段长度 | size12 | size12 | size12 | t-PollRetransmit/poll重传间隙 | ms45 | ms45 | ms45 | pollPDU/poll PDU字节 | Infinity | Infinity | Infinity | PollByte/poll比特 | Infinity | Infinity | Infinity | maxRetxThreshold/最大重发门限 | t8 | t8 | t8 | dl-RLC-Config/下行RLC配置 |
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| sn-FieldLength/sn字节 | size12 | size12 | size12 | t-Reassembly/重组时长 | ms35 | ms35 | ms35 | t-StatusProhibit/状态禁止时长 | ms0 | ms0 | ms0 | logicalChannelIdentity/逻辑信道标识 | 1 | 2 | 3 | LogicalChannelConfig/逻辑信道配置整kangguoying,20200528 |
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| Priority/优先级 | 1 | 3 | 1 | prioritisedBitRate/优先比特速率kangguoying,20200528 | Infinity | Infinity | Infinity | logicalChannelGroup/逻辑信道组 | 0 | 0 | 0 |
2.NAS和RRC消息与SRB映射 整理:kangguoying,20200528
Message/消息 | Direction/方向 | Logical Channel/信道 | RLC Mode/RLC 传输模式 | SRB Mapping/SRB 映射 | MasterInformationBlock | UE <– NW | BCCH | TM | N/A | SIB1kangguoying,20200528 | UE <– NW | BCCH | TM | N/A | SystemInformation | UE <– NW | BCCH | TM | N/A | RRCSetupRequest | UE –> NW | CCCH | TM | SRB0 | RRCSetup | UE <– NW | CCCH | TM | SRB0 | RRCResumeRequest1 | UE –> NW | CCCH1 | TM | SRB0 | RRCSystemInfoRequest | UE –> NW | CCCH | TM | SRB0 | RRCReject | UE <– NW | CCCH | TM | SRB0 | RRCResumeRequest | UE –> NW | CCCH | TM | SRB0 | RRCReestablishmentRequest | UE –> NW | CCCH | TM | SRB0 | RRCSetupComplete | UE –> NW | DCCH | AM | SRB1 | RRCRelease | UE <– NW | DCCH | AM | SRB1 | RRCReconfiguration | UE <– NW | DCCH | AM | SRB1,SRB3 | RRCReconfigurationComplete | UE –> NW | DCCH | AM | SRB1,SRB3 | MeasurementReport | UE –> NW | DCCH | AM | SRB1,SRB3 | MobilityFromNRCommand | UE <– NW | DCCH | AM | SRB1 | Paging | UE <– NW | PCCH | TM | N/A | RRCReestablishment | UE <– NW | DCCH | AM | SRB1 | RRCReestablishmentComplete | UE –> NW | DCCH | AM | SRB1 | RRCResume | UE <– NW | DCCH | AM | SRB1 | RRCResumeComplete | UE –> NW | DCCH | AM | SRB1 | SecurityModeCommand | UE <– NW | DCCH | AM | SRB1 | SecurityModeComplete | UE –> NW | DCCH | AM | SRB1 | SecurityModeFailure | UE –> NW | DCCH | AM | SRB1 | UEAssistanceInformation | UE –> NW | DCCH | AM | SRB1 | UECapabilityEnquiry | UE <– NW | DCCH | AM | SRB1 | UECapabilityInformation | UE –> NW | DCCH | AM | SRB1 | ULInformationTransfer | UE –> NW | DCCH | AM | SRB1,SRB2 |
原文来自:http://www.techplayon.com/ ,整理:kangguoying,20200520
转载引用请注明来源,谢谢!
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