如果NSA网络下存在5G链路时，收到5G的 RADIO_BEARER_CONFIG 为 keyToUse master，则5G链路会自动释放。等待下次配置

09:53:47.238	[0xB821]	NR5G RRC OTA Packet

value RadioBearerConfig ::= 
{
  drb-ToAddModList 
  {
    {
      cnAssociation eps-BearerIdentity : 5,
      drb-Identity 3,
      reestablishPDCP true,
      pdcp-Config 
      {
        drb 
        {
          discardTimer ms500,
          pdcp-SN-SizeUL len18bits,
          pdcp-SN-SizeDL len18bits,
          headerCompression notUsed : NULL
        },
        t-Reordering ms1500
      }
    }
  },
  securityConfig 
  {
    securityAlgorithmConfig 
    {
      cipheringAlgorithm nea0,
      integrityProtAlgorithm nia2
    },
    keyToUse master
  }
}