EV-DO Guidelines

(1).IS-856 FL rates range from 38.4 kbps to 2.4 Mbps.IS-856 RL rates range from 9.6 kbps to 153.6 kbps.

(2).Actual throughput available to any one user depends on:

Forward link: User class of service, Application, Total number of users served by the sector, Signal-to-Interference and Noise Ratio (SINR).

Reverse link: User class of service ,Application ,Total number of users served by the sector, Signal-to-Interference.

(3).Each slot consists of 2048 pseudorandom noise (PN) chips.

(4).Reverse Link: Organized around 26.66 ms Physical Layer frames.

(5).Forward link: Provides a data channel that is divided into 1.66 ms slots. Pilot Channels ,Control Channel and user traffic are time multiplexed .Users are time division multiplexed using a scheduler. Fixed power, variable rate , transmission rate is used. Feedback from the AT (using the DRC Channel) is used to determine the transmission rate.Forward link is entirely dedicated to a single AT at any given instance of time.Pilot Channels, Control Channels, and user traffic are time multiplexed.

(6).The power levels for data are adjusted based on the selected data rate.

(7).IP address and PPP states retained for long period of time.

(8).Data is transmitted from only one sector (from a single Access point) at a time. There is no Traffic Channel soft handoff overhead which improves Forward capacity.

(9).Virtual soft handoff or fast cell site selection.There are practical limitations on how

quickly an AT can change serving AP. Like handoffs, there is a delay associated with the time it

takes the infrastructure to switch between Access points.

(10).The DRC requests data from only one sector at a time. The requested data rates follow the fading process,

with higher data requests requested when conditions are good and lower rates requested when the

channel is degraded.Conservative DRC may result in large excess SINR of the received packet.

(11).Signaling Network Protocol (SNP) – messaging protocol;Signaling Link Protocol (SLP) – fragmentation, best effort, and reliable delivery.

(12).Physical Layer – Channel structure, frequency, power, modulation, and encoding;MAC Layer – Procedures for receive and transmit over the Physical Layer,Rules controlling operation of the Control Channel, Access Channel,

Forward Traffic Channel, and Reverse Traffic Channel,MAC Layer packet encapsulation;Security Layer – Authentication and encryption services;Connection Layer – Air link connection establishment and maintenance;Session Layer – Protocol negotiation and configuration, session state maintenance;Stream Layer – Multiplexing of applications with different Quality of Service (QoS);Application Layer – Air link packet and signaling applications.

(13).Note that the 1xEV-DO Application Layer and the Open Systems Interconnection (OSI)

Application Layer are not the same. The seven 1xEV-DO layers are an expansion of the Physical

and Data Link Layers in the OSI protocol stack.

(14).Forward Channel (Rate Control):TDM (Full-power Pilot burst helps accurate SINR

estimation for link adaptation);MAC Channels are code division multiplexed.

(15).Reverse Channel:CDM Power Control.The RA Channel carries the Reverse Activity

Bit (RAB).RAB instructs ATs to change the data rate on the

Reverse link.RAB provides information to the AT to instruct it to

increase or decrease the data rate on the Reverse

link.

(16).Transmission of the synchronous capsule on the Control Channel is delayed

by “offset” slots with respect to the start of the Control Channel cycle.This prevents the CC Sync of one sector from interfering with the CC Sync of another sector with a different offset.

(17).Default maximum number of probe sequences = 3,Number of probes per sequence = [1, 15].

(18).In the worst case the percentage of time that the AT must not transmit is 0.15%.

(19).For transmit, provides a cryptosync used by the negotiated Authentication Protocol and Encryption Protocol.For receive, computes the cryptosync using information found in the Security Protocol header.

(20).Key exchange is based on the Diffie-Hellman (DH) algorithm.These messages are exchanged when the session is established.The AN initiates the key exchange.

(21).IS-856 air interface authentication;Access Authentication (performed by RAN);ISP Authentication (between the user and the PDSN).

(22).PZID:Determines one PCF area.