摘要:
A multicast architecture and method of operation for multi-hop wireless mesh networks is provided. The multicast architecture is above the network infrastructure to identify a group of clients. These clients share the same application and communicate to each other by using a common multicast address.
摘要:
A method for tree based spatial TDMA scheduling in a multi-hop wireless network (100). A time slot is requested (101) for non-use by a requesting node to all neighboring nodes. Similarly, the requested time slot is next requested (103) for non-use from the requesting node to its parent nodes. If available, a time slot assignment is then requested (109) from the requesting node to its parent node where the time slot assignment is requested (111) from the parent node to the grandparent node of the requesting node. Finally, all neighboring nodes are then informed (117, 119, 121) if both the grandparent node and parent node grant the time slot request to the requesting node. The invention works to reduce packet collisions by providing link-slot formulation in combination with link direction to compensate for spatial reuse loss in a local optimization setting.
摘要:
A system and method of security authentication and key management scheme in a multi-hop wireless network is provided herein with a hop-by-hop security model. The scheme adapts the 802.11r key hierarchy into the meshed AP network. In this approach, a top key holder (R0KH) derives and holds the top Pairwise Master Key (PMK—0) for each supplicant wireless device after the authentication process. All authenticator AP take the level one key holder (R1KH) role and receive the next level Pairwise Master Key (PMK—1) from R0KH. The link level data protection key is derived from PMK—1 via the 802.11i 4-way handshaking.
摘要:
Unified groupcast data frame formats are provided for improving the efficiency of groupcast communications in multihop wireless mesh networks, and significantly reducing bandwidth consumption. The unified groupcast data frame formats modify existing BSS data frame formats by inserting a mesh end-to-end sequence number into a field that is normally reserved for a sequence control field. In some implementations, a time-to-live (TTL) value can also be inserted into a QoS control field.
摘要:
The present invention provides a system and method for multihop packet forwarding within a multihop wireless communication network. The method uses a data frame format including at least the four address fields to forward packets in a multihop wireless network. The method includes generating a route request packet at a routable device in response to receiving a packet destined for an unknown destination. The route request packet includes an originating device field including an address of an originating device, wherein the originating device generated the packet originally; and a source field, wherein the source field includes an address of the first routable device which generated the route request packet.
摘要:
A communication network (600) includes a first communication device (102-1) and at least one other communication device (102-3), wherein the first communication device (102-1) and the at least one other communication device (102-3) are proximately located. The communication network further includes a transaction detector (625) coupled between the first communication device (102-1) and the at least one other communication device (102-3) for detecting one or more transactions intended for each of the proximately located communication devices. The communication network (600) further includes a bandwidth allocator (610) adapted to impede communication activity for a predetermined time for the at least one other proximately located communication devices (102-3), and activate communication activity for the predetermined time for the first communication device (102-1) in response to the transaction detector (625) detecting a transaction intended for the first communication device (102-1).
摘要:
A multi-hop wireless network includes an originator node, a proxy node, and at least one other node. The originator node generates a data packet and transmits the data packet to the proxy node. The proxy node receives and forwards to the at least one other node the data packet including an originator node address and a proxy node sequence number for an end-to-end groupcast sequence number.
摘要:
A system and method of security authentication and key management scheme in a multi-hop wireless network is provided herein with a hop-by-hop security model. The scheme adapts the 802.11r key hierarchy into the meshed AP network. In this approach, a top key holder (R0KH) derives and holds the top Pairwise Master Key (PMK—0) for each supplicant wireless device after the authentication process. All authenticator AP take the level one key holder (R1KH) role and receive the next level Pairwise Master Key (PMK—1) from R0KH. The link level data protection key is derived from PMK—1 via the 802.11i 4-way handshaking.
摘要:
A system and method for supporting multicast in highly dynamic wireless multi-hop networks, such as ad-hoc networks, with good scalability. The system and method provide a multicast routing algorithm to work in wireless ad-hoc networks without any fixed infrastructure nodes present. In doing so, the system and method provide a technique to build a multicast source specific tree on demand, while using a core source node to limit routing overhead. The system and method further provide a repair process to reduce the latency of discovery of topology change, employ a node sequence number mechanism to differentiate between upstream nodes and downstream nodes on the multicast tree in the repair process, and provide an active joining process to reduce the latency of discovery of membership change.
摘要:
A system and method for supporting multicast in highly dynamic wireless multi-hop networks, such as ad-hoc networks, with good scalability. The system and method provide a multicast routing algorithm to work in wireless ad-hoc networks without any fixed infrastructure nodes present. In doing so, the system and method provide a technique to build a multicast source specific tree on demand, while using a core source node to limit routing overhead. The system and method further provide a repair process to reduce the latency of discovery of topology change, employ a node sequence number mechanism to differentiate between upstream nodes and downstream nodes on the multicast tree in the repair process, and provide an active joining process to reduce the latency of discovery of membership change.