在5G(NR)网络中终端需要进行上行数据发送时,需先通过BSR( Buffer Status Report )向基站进行(上行)无线资源的申请,以等待分配(上行信道)资源;kangguoying20210107
5G(NR)网络中终端BSR( Buffer Status Report )通过MAC CE单元进行需求信息传递;根据3GPP TS38.321定义;kangguoying20210107
1. 5G网络BSR( Buffer Status Report )MAC CE形式
38.321-Figure 6.1.3.1-1: Short BSR and Short Truncated BSR MAC CEkangguoying20210107
38.321-Figure 6.1.3.1-2: Long BSR and Long Truncated BSR MAC CE kangguoying20210107
2.5G网络中终端BSR中请求的上行资源
5G(NR)网络中BSR有两种规格分别为5bit和8bit;它们请求的资源各不相同其分别如下:kangguoying20210107
38.321-Table 6.1.3.1-1: Buffer size levels (in bytes) for 5-bit Buffer Size fieldkangguoying20210107
38.321-Table 6.1.3.1-2: Buffer size levels (in bytes) for 8-bit Buffer Size fieldkangguoying20210107
3.高层消息中的BSR(RRC Parameters for BSR)
网络侧对终端上报BRS的格式通过高层消息RRC进行广播 ,其中包括:配置格式,周期和重发时间;
MAC-CellGroupConfig ::= SEQUENCE {kangguoying20210107
drx-Config SetupRelease { DRX-Config } OPTIONAL, -- Need M
schedulingRequestConfig SchedulingRequestConfig OPTIONAL, -- Need M
bsr-Config BSR-Config OPTIONAL, -- Need Mkangguoying20210107
tag-Config TAG-Config OPTIONAL, -- Need M
phr-Config SetupRelease { PHR-Config } OPTIONAL, -- Need M
skipUplinkTxDynamic BOOLEAN,kangguoying20210107
..., [[
csi-Mask-v1530 BOOLEAN OPTIONAL , -- Need M
dataInactivityTimer-v1530 SetupRelease { DataInactivityTimer } OPTIONAL -- Need
PCellOnlykangguoying20210107
]]}
BSR-Config ::= SEQUENCE {kangguoying20210107
periodicBSR-Timer ENUMERATED { sf1, sf5, sf10, sf16, sf20, sf32, sf40, sf64,
sf80, sf128, sf160, sf320, sf640, sf1280,
sf2560, infinity },kangguoying20210107
retxBSR-Timer ENUMERATED { sf10, sf20, sf40, sf80, sf160, sf320, sf640,
sf1280, sf2560,sf5120, sf10240, spare5, spare4,
spare3, spare2, spare1},kangguoying20210107
logicalChannelSR-DelayTimer ENUMERATED { sf20, sf40, sf64, sf128, sf512, sf1024,
sf2560, spare1} OPTIONAL, -- Need Rkangguoying20210107
...}
整理:kangguoying20210107
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