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7 Layers of Protocol on CDMA2000 1xEV

November 24, 2015 | Article | No Comments

CDMA2000 1xEV network is an evolution of CDMA2000 network. This network is one of commonly used network on cellular / mobile broadband telecommunication. To activated/enabled this network or migrate to CDMA we must examine the BTS compatibility. BTS (Base Transceiver Station) is responsible for resource allocation, power, and Walsh code. Alongside that, BTS also has physical radio transmission that used to transmit and receive signal. BTS controlling interface between network system with subscriber and other aspects that can influence the network performance.

To interconnecting computer on internet we have known OSI layer. OSI layer composed from 7 layers, such as: Physical, Data Link, Network, Transport, Session, Presentation, and Application. These seven layers describing and dividing network into small components that can be easily maintained and developed. The similiar condition applied to EVDO (CDMA2000 1xEV). This network modularize its utility into 7 layers. Let say 1xEV protocol layer. This article will give explanation about each protocol from the lowest level.

Physical layer

The lowest layer that connected directly to hardware and user devices. The only protocol on this layer is: Physical Layer Protocol. This layer gives functionality to transmit data from one node to another node (can be from BTS to Mobile Equipment or vice versa). This layer provide the channel structure, frequency, output power, modulation, and encoding specification. Conceptually, this layer is similar to Physical layer on OSI layer

MAC Layer

Similar to datalink layer on OSI layer model. MAC Layer or Medium Access Control Layer is a layer controlling or defining procedure used for either transmission or receiving data across physical layer. Protocol on this layer are: Control Channel MAC  Protocol; Forward Traffic Channel MAC Protocol; Access Channel MAC Protocol; Reverse Traffic Channel MAC Protocol.

Security Layer

This layer provide security support such as authentication an encryption system. Protocol on this layer are: Security Protocol; Key Exchange Protocol; Authentication Protocol; Encryption Protocol.

Connection Layer

This layer provide air link connection construction and maintenance it. Protocol on this layer are: Airlink Management Protocol; Initialization State Protocol; Idle State Protocol; Connected State Protocol; Packet Consolidation Protocol; Route Update Protocol; Overhead Message Protocol.

Session Layer

This layer provide negotiation function, configuration, and state maintenance service. Basically this layer has similar functions as Session Layer on OSI layer. Protocol on this layer are: Session Management Protocol; Address Management Protocol; Session configuration Protocol.

Stream Layer

This layer provide multiplexing process on stream application. This layer only has one protocol which is: Stream Protocol.

Application Layer

This layer provide system that used for carrying 1xEV information (Default Signaling Application) and user data information (Default Packer Application). Protocol on this layer is divided into those 2 categories: SNP, SLP for Default Signaling Application and FCP, RLP, LUP for Default Packet Application

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