EP0924914A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Mobile internet protocol

Assignee: Nokia Oyj

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Filing: 1998-11-10

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Granted: —

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Expires: 2018-11-10

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Abstract

Abstract A method of enabling roaming of a mobile intemet-access terminal from a first to a second intemet access network each of which has a home agent for routing intemet datagrams between networks. The method comprises de-registering the mobile terminal from said first network and registering it with said second network and allocating to the mobile terminal a new intemet address in said second network. This new intemet address is transmitted to the first network's home agent which registers that address as a care-of-address or co-located care-of-address for the mobile host. Datagrams addressed to the new intemet address are sent directly to the mobile host via the second network's home agent. Datagrams addressed to a previous intemet address of the mobile terminal in said first network are forwarded from that network's home agent to the mobile host, via the second network's home agent.

Inventors

👤 Matti Turunen

Bibliographic Details

Application Number —

Jurisdiction EP

Data Source google_patents

Last Synchronized 2026-10-24 19:16

CPC Classifications

H; H04; H04W; H04W8/00; H04W8/02; H04W8/08; H04W8/082; H04L; H04L61/00; H04L61/50; H04L61/5007; H04L61/5014; H04L61/5076; H04L61/5084; H04L9/00; H04L9/40; H04W36/00; H04W36/0005; H04W36/0011; H04W36/0019; H04W80/00; H04W80/04; H04W84/00; H04W84/02; H04W84/10; H04W84/12

Claims Analysis

Total Claims: 8

Claim 1

Independent Claim 156 words

A method of enabling roaming of a mobile host from a first to a second internet access network each of which has a home agent for routing internet datagrams between networks, the method comprising: de-registering the mobile host from said first network and registering it with said second network; assigning to the mobile host a new internet address in said second network; transmitting said new intemet address to the first network's home agent, and registering that transmitted address at the first network's home agent as a care-of-address or co-located care-of-address for the mobile host, wherein datagrams addressed to said new intemet address are sent directly to the mobile host via the second network's home agent, and datagrams addressed to an internet address previously assigned to the mobile host in said first network are forwarded, using said registered care-of-address or co-located care-of-address, from that network's home agent to the mobile host via the second network's home agent.

Claim 2

Dependent Claim 31 words

A method according to claim 1, wherein said first and second networks are one of a corporate local area network (LAN) or wide area network (WAN), and a cellular telephone network.

Claim 3

Dependent Claim 23 words

A method according to claim 2, wherein the corporate LAN or WAN is one of a fixed line network or a wireless network.

Claim 4

Dependent Claim 22 words

A method according to claim 2 or 3, wherein the cellular telephone network comprises a GSM (Global System for Mobile Communications) network.

Claim 5

Independent Claim 21 words

A method according to any one of claims 2 to 4, wherein the cellular telephone network comprises a plurality of subnetworks.

Claim 6

Dependent Claim 18 words

A method according to claim 5, wherein one or more of said subnetworks is/are wireless LANs or WANs.

Claim 7

Dependent Claim 135 words

Apparatus for enabling roaming of a mobile host from a first to a second internet access network, the apparatus comprising: second network control means for registering the mobile host to the second network and for transmitting to the mobile host a new internet address in the second network to replace any internet address previously allocated to the host; transmission means for transmitting said new internet address from the mobile host to the home agent in the first network; first network control means for registering said transmitted address at the first network's home agent as a care-of-address or co-located care-of-address for the mobile host; and datagram routing means in said first network for forwarding datagrams received at said first network and destined for the mobile host to the mobile host via the second network's home agent.

Claim 8

Dependent Claim 28 words

Apparatus according to claim 7, wherein at least one of said first and second networks is a wireless telephone network and said mobile host is a wireless terminal.

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