Forwarding and routing method for wireless transport service
The routing method for wireless transport service comprises a step of receiving a unicast frame from an associated client; determining whether a destination of the unicast frame is locally associated. A wireless node delivers the unicast frame to a final destination if positive, otherwise, determining whether an associated transport device of a destination can be determined. The WITnet header is added and the associated transport device of the destination is put in an auxiliary address field if positive, otherwise, the next step is performed to add the WITnet header and put an address of a default edge device in the auxiliary address field. The next step is setting a tunnel frame flag, and then delivering the unicast frame to a next-hop toward the auxiliary address.
1. A wireless transport network system which contains:
a node configured to determine a signal strength, the node further configured to add a WITnet header including:
a group of bits providing version information including version number;
a group of bits providing type information;
a group of bits providing Flags information;
a group of bits providing Pri (Priority of the frame) information;
a group of bits providing GRP ID (Group ID) information;
a group of bits providing TTL (Time to live value) information;
a group of bits providing Key Index information;
a group of bits providing Fragment ID information;
a group of bits providing Reserved information;
a group of bits providing Preserved Ethertype information; and
a group of bits providing Auxiliary Address information;
wherein the group of bits providing Auxiliary Address information contains an address of an associated transport device of a destination on a wireless network when a predetermined one of said group of bits providing Flags information is set, the associated transport device being on the wireless network and having a greater signal strength than the destination.
2. The system of claim 1 , wherein said group of bits providing type information includes:
100b control frames for routing messages, neighbor discovery, ping/trace route frames;
010b management frame for client membership announcement; and
000b data frame for from/to clients including client data, configuration, and network management.
3. The system of claim 1 , wherein said group of bits providing Flags information includes:
Bit 8 : membership announcement;
Bit 9 : tunnel frame;
Bit 10 : backbone node alert;
Bit 11 : no forward bit;
Bit 12 : fragment flag;
Bit 13 : more fragment flag; and
Bit 14 -b 15 : Reserved.
4. The system of claim 1 , wherein said group of bits providing priority of the frame information includes frame from 0 (lowest) to 7 (highest).
5. The system of claim 1 , wherein said group of bits providing key Index information including Group key index, wherein said Group key index is 0 if pair wise key is used between transport devices, if all 0′s, the frame is not encrypted.
6. The system of claim 1 , wherein said group of bits providing Auxiliary Address information includes:
Flag Bit 8 and Bit 9 are UNSET and it is broadcast frame: Address of device that sends said broadcast frame two hops before.
7. The system of claim 1 , wherein said group of bits providing Reserved information includes a 2-byte field used to make the header 4-byte aligned.
8. The system of claim 1 , wherein said group of bits providing Preserved Ethertype information carrying an original Ethertype value.
9. A wireless transport network system containing a frame of an IEEE802.11 MAC (medium access control) comprising:
a node configured to determine a signal strength, the node further configured to add a WITnet header;
a group of bytes providing frame RA (Receiver Address) information, which identifies the immediate recipient of the frame;
a second group of bytes specifies the TA (Transmitter Address) information, which identifies the transmitter of the frame;
groups of bytes providing layer of DA and SA information, wherein said DA refers to a destination address, said SA refers to a Source Address;
a group of bytes providing a protocol identifiers;
a group of bytes defining the WITnet header, the WITnet header comprising a group of bits providing Flags information and group of bits providing Auxiliary Address information, the group of bits providing Auxiliary Address information containing an address of an associated transport device of a destination on a wireless network when a predetermined one of said group of bits providing Flags information is set, the associated transport device being on the wireless network and having a greater signal strength than the destination; and
a group of bytes defining a MSDU (MAC Service Data Unit) which carries information to be served by a transport network.