Mobile wireless router

• US 20020118663A1
• Filed: 02/27/2001
• Published: 08/29/2002
• Est. Priority Date: 02/27/2001
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Dorenbosch, Jheroen P., Patel, Vijaykumar M.
• Granted Patent: US 6,757,269 B2
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04L 12/5692 Selection among different networks
• CPC Class Codes: H04W 40/02 Communication route or path selection, e.g. power-based or shortest path routing
• CPC Class Codes: H04W 40/12 based on transmission quality or channel quality
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/12 Access point controller devices

Abstract

A mobile wireless router (100) includes a first wireless transceiver (102) for accessing a wireless packet data channel (206), and a network interface (106) for coupling to a first network (204). The mobile wireless router also includes a processor (104) coupled to the first wireless transceiver and coupled to the network interface for controlling and communicating with the first wireless transceiver and the network interface. The processor is programmed to provide an internet protocol (IP) router function to terminal equipment (TE) (202) coupled to the mobile wireless router through the first network, and is further programmed to appear, to another device (214) in a second network (220) coupled via the wireless packet data channel, to be an ordinary router.

Claims

1. A mobile wireless router, comprising:

a first wireless transceiver for accessing a wireless packet data channel;

a network interface for coupling to a first network; and

a processor coupled to the first wireless transceiver and coupled to the network interface for controlling and communicating with the first wireless transceiver and the network interface, the processor programmed to provide an internet protocol (IP) router function to terminal equipment (TE) coupled to the mobile wireless router through the first network, and further programmed to appear, to another device in a second network coupled via the wireless packet data channel, to be an ordinary router.

2. The mobile wireless router of claim 1, wherein the first wireless transceiver and the processor are arranged and programmed to cooperate to access the wireless packet data channel of a cellular telephone system.

3. The mobile wireless router of claim 1, wherein, in response to accessing the wireless packet data channel, the processor is further programmed to

activate a packet data protocol (PDP) context using at least one access point identifier to connect with at least one corresponding gateway of the second network.

4. The mobile wireless router of claim 1, wherein the processor is further programmed to:

cooperate with the first wireless transceiver to measure a current transmission quality of the wireless packet data channel;

determine and store a current link metric based on the current transmission quality;

compare the current link metric with a previously stored link metric; and

advertise the current link metric to at least one neighbor router, when the current link metric and the previously stored link metric differ by more than a predetermined amount.

5. The mobile wireless router of claim 1, wherein the processor is further programmed to

control the first wireless transceiver to send a router-specific communication when the mobile wireless router accesses the wireless packet data channel.

6. The mobile wireless router of claim 1, further comprising

a second wireless transceiver coupled to the processor, wherein the processor is further programmed to control the second wireless transceiver to couple to a second mobile wireless router which is coupled to a third network.

7. The mobile wireless router of claim 6, wherein the processor is further programmed to:

cooperate with the first wireless transceiver to measure a current transmission quality of the wireless packet data channel;

estimate a current maximum transmission speed through the wireless packet data channel, based upon the current transmission quality; and

decide to route a communication through one of the wireless packet data channel and the second mobile wireless router, based upon the current maximum transmission speed.

8. The mobile wireless router of claim 6, wherein the processor is further programmed to route communication traffic of the TE via the second mobile wireless router to the third network, when the second network is unable to handle said communication traffic.

9. The mobile wireless router of claim 6, wherein the processor is further programmed to route communication traffic of the TE via the second mobile wireless router to the third network, when the mobile wireless router is unable to handle said communication traffic over the wireless packet data channel.

10. A mobile wireless router, comprising:

first wireless transceiver means for accessing a wireless packet data channel;

network interface means for coupling to a first network; and

processor means coupled to the first wireless transceiver means and coupled to the network interface means for controlling and communicating with the first wireless transceiver means and the network interface means, the processor means programmed to provide an internet protocol (IP) router function to terminal equipment (TE) coupled to the mobile wireless router through the first network, and further programmed to appear, to another device in a second network coupled via the wireless packet data channel, to be an ordinary router.

11. The mobile wireless router of claim 10, wherein the first wireless transceiver means and the processor means are arranged and programmed to cooperate to access the wireless packet data channel of a cellular telephone system.

12. The mobile wireless router of claim 10, wherein, in response to accessing the wireless packet data channel, the processor means is further programmed to

activate a packet data protocol (PDP) context using at least one access point identifier to connect with at least one corresponding gateway of the second network.

13. The mobile wireless router of claim 10, wherein the processor means is further programmed to:

cooperate with the first wireless transceiver means to measure a current transmission quality of the wireless packet data channel;

determine and store a current link metric based on the current transmission quality;

compare the current link metric with a previously stored link metric; and

advertise the current link metric to at least one neighbor router, when the current link metric and the previously stored link metric differ by more than a predetermined amount.

14. The mobile wireless router of claim 10, wherein the processor means is further programmed to

control the first wireless transceiver means to send a router-specific communication when the mobile wireless router accesses the wireless packet data channel.

15. The mobile wireless router of claim 10, further comprising

a second wireless transceiver means coupled to the processor means, wherein the processor means is further programmed to control the second wireless transceiver means to couple to a second mobile wireless router which is coupled to a third network.

16. The mobile wireless router of claim 15, wherein the processor means is further programmed to:

cooperate with the first wireless transceiver means to measure a current transmission quality of the wireless packet data channel;

estimate a current maximum transmission speed through the wireless packet data channel, based upon the current transmission quality; and

decide to route a communication through one of the wireless packet data channel and the second mobile wireless router, based upon the current maximum transmission speed.

17. The mobile wireless router of claim 15, wherein the processor means is further programmed to route communication traffic of the TE via the second mobile wireless router to the third network, when the second network is unable to handle said communication traffic.

18. The mobile wireless router of claim 15, wherein the processor means is further programmed to route communication traffic of the TE via the second mobile wireless router to the third network, when the mobile wireless router is unable to handle said communication traffic over the wireless packet data channel.