System and method for multihop packet forwarding

1. A method for communicating within a multihop wireless communications network, the method comprising:

at a first routable device:

receiving a packet for a destination;

determining that no valid route information for the destination or for a proxy of the destination is stored within the first routable device; and

generating a route request packet comprising:

an originating device field including an address of an originating device, wherein the originating device generated the packet originally;

a source field, wherein the source field includes an address of the first routable device which generated the route request packet; and

a destination only bit, wherein the destination only bit is set to true when the type of terminating device is unknown by the first routable device.

2. A method for communicating within a multihop wireless communications network as claimed in claim 1 , wherein the originating device is a routable device.

3. A method for communicating within a multihop wireless communications network as claimed in claim 1 , wherein the route request packet is destined for an unknown destination.

4. A method for communicating within a multihop wireless communications network as claimed in claim 1 , wherein the originating device comprises the first routable device.

5. A method for communicating within a multihop wireless communications network as claimed in claim 1 , wherein the originating device comprises a non routable device proxied by the first routable device.

6. A method for communicating within a multihop wireless communications network as claimed in claim 1 , the method comprising:

at a destination routable device:

receiving the route request packet; and

generating a route reply packet when the destination routable device comprises one of a device selected from a group comprising a terminating device of the route request and a proxy for the terminating device,

wherein the route reply packet further comprises:

a terminating device field, wherein the terminating device field includes an address of a terminating device, wherein the terminating device is the device for which the route request packet is destined; and

a destination field, wherein the destination field includes an address of the destination routable device.

7. A method for communicating within a multihop wireless communications network as claimed in claim 6 , wherein the terminating device is a routable device.

8. A method for communicating within a multihop wireless communications network as claimed in claim 6 , wherein the terminating device is a non routable device.

9. A method for communicating within a multihop wireless communications network as claimed in claim 6 , further comprising:

at an intermediate node:

receiving the route reply;

creating a reverse entry to the destination field;

comparing the terminating device field and the destination field of the route reply; and

updating a proxy entry within a proxy table for the terminating device to the destination address when the terminating device field address is different from the destination field address.

10. A method for communicating within a multihop wireless communications network as claimed in claim 1 , further comprising:

at an intermediate node:

receiving the route request packet.

11. A method for communicating within a multihop wireless communications network as claimed in claim 10 , further comprising:

at the intermediate node:

creating a reverse entry to the source field of the route request packet.

12. A method for communicating within a multihop wireless communications network as claimed in claim 10 , further comprising:

at the intermediate node:

comparing the originating device field and the source field of the route request packet; and

updating a proxy entry for the originating device to the address within the source field when the originating device field is different from the source field.

13. A method for communicating within a multihop wireless communications network as claimed in claim 10 , further comprising:

at the intermediate node:

generating a route reply to the first routable device, wherein the route reply comprises:

a destination field, wherein the destination field includes an address of the intermediate node; and

a terminating device field, wherein the terminating device field includes a destination address of a destination device of the packet, wherein the destination device is a routable device.

14. A method for communicating within a multihop wireless communications network as claimed in claim 10 , further comprising:

at the intermediate node:

searching the terminating device address of a received packet in a local proxy table of the intermediate node;

identifying the destination routable device to which the terminating device is proxied; and

forwarding the packet to a next hop towards the destination device by using a routing table of the intermediate node.