Mr Kang
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發(fā)表于 2020-05-28 08:48:29
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SRB意為無線信令承載，其定義為RBs，僅用于傳輸RRC和NAS信息；3GPP TS38.331中對5G(NR)網(wǎng)絡中的SRB定義有四種類型：整理：kangguoying,20200528
5G(NR)網(wǎng)絡中除SRB3外，其他與LTE相同；在EN-DC中SRB3用于UE與SgNB之間通過NR無線接口傳遞RRC信息；整理：kangguoying,20200528
SRB的默認配置整理：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配置選擇：kangguoying,20200528 | AM | AM | AM | ul-RLC-Config/上行RLC配置 |
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| sn-FieldLength/SN字段長度 | size12 | size12 | size12 | t-PollRetransmit/poll重傳間隙 | ms45 | ms45 | ms45 | pollPDU/poll PDU字節(jié) | Infinity | Infinity | Infinity | PollByte/poll比特 | Infinity | Infinity | Infinity | maxRetxThreshold/最大重發(fā)門限 | t8 | t8 | t8 | dl-RLC-Config/下行RLC配置 |
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| sn-FieldLength/sn字節(jié) | size12 | size12 | size12 | t-Reassembly/重組時長 | ms35 | ms35 | ms35 | t-StatusProhibit/狀態(tài)禁止時長 | ms0 | ms0 | ms0 | logicalChannelIdentity/邏輯信道標識 | 1 | 2 | 3 | LogicalChannelConfig/邏輯信道配置整kangguoying,20200528 |
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| Priority/優(yōu)先級 | 1 | 3 | 1 | prioritisedBitRate/優(yōu)先比特速率kangguoying,20200528 | Infinity | Infinity | Infinity | logicalChannelGroup/邏輯信道組 | 0 | 0 | 0 |
2.NAS和RRC消息與SRB映射 整理：kangguoying,20200528
Message/消息 | Direction/方向 | Logical Channel/信道 | RLC Mode/RLC 傳輸模式 | 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 |
原文來自：http://www.techplayon.com/ ，整理：kangguoying,20200520
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