Ericsson HM200c/HM201c Uživatelský manuál stáhnout pdf (Strana 12)

Ericsson Review No. 1, 2001

43

Some of the enhancements are

• configuration and registration for cable-

modem-based QoS;

• fragmentation of upstream packet data;

• payload header suppression; and

• dynamic establishment of QoS-enabled

service flows by the CMTS.

The PacketCable standard stipulates how

quality of service should be implemented for

different kinds of multimedia flow. The se-

curity part of the standard also incorporates

provisions for baseline privacy and encryp-

tion protocols, for encrypting packet data

across the cable network.

The future of cable modems

In the future, cable modems will probably

be bundled with other networking features

and LAN technologies to facilitate the dis-

tribution of broadband IP into the home. At

the low end, simple versions of cable

modems will be incorporated into personal

computers. This evolution into a home gate-

way is already starting to take place. For con-

venience and security, the gateway will pro-

vide basic software features, such as network

address translation (NAT), and function as

a DHCP server for local devices, allowing

users to set up an extensive home network.

Firewalls and content filtering can also be

incorporated into the modem to enhance the

security of the family computing environ-

ment. Operators can simplify the imple-

mentation and generate additional revenue

by offering these features in the form of a

managed service.

Universal plug and play is being investi-

gated to make implementation easy. Other

wired and wireless LAN interfaces are being

considered, including Bluetooth, Hiper-

LAN/2, HomePNA and powerline net-

works. Specialty devices, such as set-top

boxes and game machines, might also come

with built-in cable modems in the future.

These devices might even serve as home

gateways.

Regardless of the form these devices take,

the most interesting and exciting part will

be the additional capabilities, services, and

entertainment that broadband access will

bring into our homes.

Conclusion

A tremendous opportunity exists with

broadband over cable. Cable industry stan-

dardization is driving exponential growth as

evidenced by sales of DOCSIS-standard

modems. Cable modems with wireless in-

terfaces will form a foundation step to in-

creased opportunities for mobile Internet

services in the home. Soon Internet proto-

col solutions for various broadband-to-home

methods (cable, DSL, fiber) will converge to

similar systems. These solutions will not

only include infrastructure, but also a suite

of additional revenue-producing services for

operators.

The full set of services available from

Ericsson to cable operators will be a key dif-

ferentiator among equipment providers.

Much of the work for fixed and mobile IP

access already developed by Ericsson can be

applied to the cable end-to-end solution.

Ericsson has the right mix of capabilities

to make broadband over cable a success—

cable modems, infrastructure and services.

This combination constitutes the bridge that

links the worldwide Internet to the home.

1. High Speed Cable Modems; Albert Azzam,

McGraw Hill Series on Computer Commu-

nications, 1997

2. Cable Modems: The Answer for Increased

Bandwidth or Just a Stop Along the Way?,

Analyst Richard Wawrzyniak, Semico

Research Corporation, April 1999

3. Data Over Cable Service Interface Specifi-

cations; Radio Frequency Interface Specifi-

cation; SP-RFI-105-991105

REFERENCES

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