User's Manual

J Plus, Inc
www.juniglobal.com J Plus Proprietary and Confidential 19/88
3.8.1 LTE protocol Stack
The LTE Protocol Stack is composed of LTE protocols defined in 3GPP Release 9.
▪ PDCP (Packet Data Convergence Protocol)
Delivery and handling of user/control data including header compression and ciphering (defined in TS
36.323)
▪ RLC (Radio Link Control)
Data delivery between MAC and PDCP including segmentation and ARQ (defined in TS 36.322)
▪ MAC (Media Access Control)
Protocol mapping between transport channels and logical channels (defined in TS 36.321)
▪ RRC (Radio Resource Control)
Protocol to handle control plane signaling (defined in TS 36.331)
▪ S1AP (S1 Application Protocol)
Signaling protocol between HeNB and EPC (defined in TS 36.413)
▪ X2AP (X2 Application Protocol)
Signaling protocol between HeNBs to handle UE mobility (defined in TS 36.423)
▪ GTP (GPRS Tunneling Protocol)
Tunneling protocol for user plane (defined in TS 29.281)
▪ SCTP (Stream Control Transmission Protocol)
Transport protocol for S1 and X2 control interfaces (defined in TS 36.412)
The LTE Protocol Stack also includes blocks to support following higher layer functions
▪ RRM (Radio Resource Management)
Management and control of radio resources including admission control and packet scheduling
▪ Mobility
Handling of mobility between cells with same or different frequencies through S1 and X2 links
▪ QoS (Quality of Service)
Provides QoS functions according to bearer types and associated parameters
▪ SON (Self Organizing Network)
Provides automatic configuration and parameter optimizations
▪ REM (Radio Environment Monitoring)
Measurement to identify surrounding cells for SON and ANR
3.8.2 Security
Security Layer covers security functions to interface with external entities and protect small cells from various
security threats using built-in cryptographic functions.
▪ Secure Boot
Performs device integrity checks upon booting to verify all HeNB components
▪ Digital Certificates
Handles X.509 Certificates for HeNB security procedures
▪ IKEv2(Internet Key Exchange Version 2)
Protocol between HeNB and Security Gateway to establish SAs (security associations)
▪ TrE (Trusted Environment)
Trustworthy environment for the execution of sensitive functions and the storage of sensitive data
▪ CMPv2 (Certificate Management Protocol Version 2)
Protocol for obtaining X.509 certificates through a PKI (Public Key Infrastructure)