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The role of IP for Interactive Services and In-Home Networks Architectural Choices

The role of IP for Interactive Services and In-Home Networks Architectural Choices. Winfried Berkvens Philips Research Eindhoven. Addressing of devices in the home Heterogeneous in-home networks Supporting multiple ISPs on a cable-network Summary. Overview.

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The role of IP for Interactive Services and In-Home Networks Architectural Choices

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  1. The role of IP for Interactive Services and In-Home NetworksArchitectural Choices Winfried Berkvens Philips Research Eindhoven

  2. Addressing of devices in the home Heterogeneous in-home networks Supporting multiple ISPs on a cable-network Summary Overview

  3. Addressing of devices in the home Heterogeneous in-home networks Supporting multiple ISPs on a cable-network Summary Overview

  4. Create one IP address domain for AN and IHN; addressing functionality provided by Access Service Provider (ASP) Choosing Address Domains (1) RG AN IHN AN + IHN address domain

  5. Create separate IP address domains for AN and IHN; addressing functionality for home devices located in IHN Choosing Address Domains (2) RG IHN AN AN address domain IHDN address domain

  6. Each home device needs to communicate with ASP every time it likes to obtain an IP address More difficult to secure the IHN ASP has to assure that home devices within one home can communicate with each other One Address Domain (1)

  7. Addressing functionality in ASP becomes almost unmanageable due to the required intelligent distribution of IP addresses Sufficient IP addresses (forming one subnet) have to be reserved for each IHN Scalability of this approach is questionable One Address Domain (2)

  8. Securing of the complete IHN is simplified Only one point of access (RG) No communication required to the AN for IP address assignment to a home device Problems if this network is not available RG does not need to be always connected Separate Address Domains (1)

  9. Expanding of the IHN becomes easier Direct communication between all in-home IP capable devices possible Management of the networks becomes easier, however IHN cannot be managed from outside Separate Address Domains (2)

  10. IP Functionality required when using Separate Address Domains DHCP, NA(P)T, DNS, DNS_ALG RG AN IHN AN address domain IHN address domain

  11. Addressing of devices in the home Heterogeneous in-home networks Supporting multiple ISPs on a cable-network Summary Overview

  12. Multi-network environment interconnected via the RG interconnected via an Inter-Network Device Heterogeneous IHNs IND IHN1 IHN2 RG AN IHN3

  13. Duplication of IP functionality inside the home network NA(P)T functionality in IND becomes more complex if the same private address range is used by several networks Separate Address Domain for each IHN (1)

  14. Moving a device between IHNs requires New IP address for the device (difficult to find device again) Updating of DNS-tables Separate Address Domain for each IHN (2)

  15. Addressing functionality located in one device (the RG), no unnecessary duplication of functionality Enables direct communication between all home devices (Intranet) All IP addresses from one address range If subnetting is used (devices moving between subnets require new address) One IHN Address Domain

  16. IP addresses in one range (no subnets) IP Functionality required when using one IHN Address Domain IND IHN1 IHN2 RG AN Proxy ARP IHN3 Proxy ARP

  17. If subnets are used IP Functionality required when using one IHN Address Domain IND IHN1 IHN2 RG AN IP-routerBOOTP relay agent IHN3 Internal IP-router

  18. Addressing of devices in the home Heterogeneous in-home networks Supporting multiple ISPs on a cable-network Summary Overview

  19. Cable-Network Architecture Supporting Multiple ISP’s ASP INA RG Intranet of ASP AN DHCP ASP: owner of the Access Network ISP: provides the (Internet) service ISP_1 ISP_n NA(P)T Internet

  20. The ASP provides IP addresses for all RGs and the connected ISPs. So, RGs can communicate directly with the ISPs The ISPs should provide the NA(P)T functionality if connections to the Internet are required Required Functionality for Multiple ISP Architecture

  21. Separate address domain AN and IHN DHCP, NA(P)T, DNS, DNS_ALG One address range in the home No subnets Proxy ARP in RG and IND Subnets IP-router, BOOTP relay agent Summary (1)

  22. One address space per AN DHCP (in ASP) NA(P)T (in ISP) Summary (2)

  23. Wireless devices entering and leaving the home network Mobile devices able to connect to their home network when away Multiple RGs or connections to various access networks QoS guarantees for requested services Other Issues

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