WO2009157986A4 - Load management in wireless mesh communications networks - Google Patents

Load management in wireless mesh communications networks Download PDF

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Publication number
WO2009157986A4
WO2009157986A4 PCT/US2009/003714 US2009003714W WO2009157986A4 WO 2009157986 A4 WO2009157986 A4 WO 2009157986A4 US 2009003714 W US2009003714 W US 2009003714W WO 2009157986 A4 WO2009157986 A4 WO 2009157986A4
Authority
WO
WIPO (PCT)
Prior art keywords
node
gateway
nodes
route
network
Prior art date
Application number
PCT/US2009/003714
Other languages
French (fr)
Other versions
WO2009157986A3 (en
WO2009157986A2 (en
Inventor
Raj Vaswani
Sterling Hughes
Jana Van Greunen
William E. San Filippo, Iii
George Flammer, Iii
Original Assignee
Silver Spring Networks, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Silver Spring Networks, Inc. filed Critical Silver Spring Networks, Inc.
Publication of WO2009157986A2 publication Critical patent/WO2009157986A2/en
Publication of WO2009157986A3 publication Critical patent/WO2009157986A3/en
Publication of WO2009157986A4 publication Critical patent/WO2009157986A4/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/12—Shortest path evaluation
    • H04L45/122—Shortest path evaluation by minimising distances, e.g. by selecting a route with minimum of number of hops
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/12—Shortest path evaluation
    • H04L45/124—Shortest path evaluation using a combination of metrics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/12—Avoiding congestion; Recovering from congestion
    • H04L47/122—Avoiding congestion; Recovering from congestion by diverting traffic away from congested entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/246—Connectivity information discovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/04—Registration at HLR or HSS [Home Subscriber Server]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0289—Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
    • H04W40/08—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources based on transmission power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
    • H04W80/045—Network layer protocols, e.g. mobile IP [Internet Protocol] involving different protocol versions, e.g. MIPv4 and MIPv6

Abstract

Methods and systems for providing a network and routing protocol for utility services are disclosed. A method includes discovering a utility network. Neighboring nodes are discovered and the node listens for advertised routes for networks from the neighbors. The node is then registered with one or more utility networks, receiving a unique address for each network registration. Each upstream node can independently make forwarding decisions on both upstream and downstream packets, i.e., choose the next hop according to the best information available to it. The node can sense transient link problems, outage problems and traffic characteristics. Information is used to find the best route out of and within each network. Each network node maintains multi-egress, multi-ingress network routing options both for itself and the node(s) associated with it. The node is capable of several route maintenance functions utilizing the basic routing protocol and algorithms.

Claims

AMENDED CLAIMS received by the International Bureau on 22 February 2010 (22.02.10)AMENDMENT UNDER ARTICLE 19 OF PCT
1. A method of load management in a wireless network having plural nodes, comprising: receiving, at a first node of the plural nodes, a request packet from a second node of the plural nodes; determining, at the first node, whether a maximum number of nodes are in a routing list of the first node, and in the event the determination the maximum number of nodes is reached, increasing a value corresponding to a path cost of the first node; sending the increased value corresponding to the path cost from the first node to a number of second nodes that the first node has determined as candidates to be dropped from the routing list; and sending an actual path cost from the first node to another number of second nodes.
2. The method of claim 1 , wherein a request packet is sent at approximately the same rate as a routing advertisement period.
3. The method of claim 2, wherein the routing advertisement period is approximately twenty minutes.
4. The method of claim 1 , wherein path cost updates from a node are included in the node's regular routing update messages.
5. The method of claim 1 , wherein the candidates that are selected to receive path cost increases are nodes that may have other second nodes for routing.
6. The method of claim 3, wherein the request packet is kept by the first node for approximately ten minutes.
7. The method of claim 1 , wherein the value corresponding to the path cost is increased by 10% to 20% above actual path cost.
8. The method of claim 1 , wherein sending the increased path cost to second nodes comprises sending to second nodes selected randomly over all nodes to which the first node sends a routing advertisement.
9. The method of claim 4, wherein a second node receiving the actual path cost by the sending node via routing updates may be instructed by the sending node not to distribute the cost information to its neighbors until the sending node clears it for distribution.
10. A method of load management in a gateway on a network having plural nodes, comprising: determining, at the gateway, whether a number of the plural nodes registered with the gateway exceeds a predetermined number, and in the event the determination is that the gateway has exceeded the predetermined number, reducing a route advertisement range by one hop.
11. A method of load management in a gateway on a network having plural nodes, comprising: determining, at the gateway, whether a number of the plural nodes registered with the gateway does not exceed a predetermined number, and in the event the determination is that the gateway has not exceeded the predetermined number, increasing a route advertisement range by one hop.
12. A method of load management in a gateway device on a network having plural nodes, comprising: receiving, from, a node registering with the gateway, information identifying the gateway as a primary, secondary or tertiary route; and determining whether the number of nodes that the gateway has registered is above a predetermined limit, and in the event the determination is that the number of nodes that the gateway has registered is above a the predetermined limit, sending, by the gateway, a negative acknowledgement to any node attempting to register as a secondary or tertiary route.
13. The method of claim 12, wherein the predetermined limit is higher for a node attempting to register as a secondary route than for a node attempting to register as a tertiary route.
14. The method of claim 12, comprising receiving a negative acknowledgement, by a node attempting to register as a secondary or tertiary route, and storing the negative acknowledgement in a list,
15. The method of claim 14, wherein the negative acknowledgement is stored in the list for a predetermined time.
16. The method of claim 15, wherein the predetermined time is approximately three hours after receiving the negative acknowledgement.
17. The method of claim 15, wherein once the predetermined time has expired, removing the negative acknowledgement from the list and informing the gateway, by the node re-registering with the gateway, if the gateway is the node's primary, secondary or tertiary route.
18. The method of claim 12, wherein the predetermined limit for the number of nodes that the gateway may register as the node's primary or secondary route is established by synchronizing a plurality of gateways with each other.
19. The method of claim 12, wherein the gateway sends a positive acknowledgement to a registration request from a node for a primary route.
20. The method of claim 19, wherein the gateway drops a node registered with it as a secondary or tertiary route before sending a positive acknowledgement to a registration request from a node for a primary route.
21. The method of claim 20, wherein the gateway sends a positive acknowledgement to a registration request from a node for a primary route and the gateway is above the predetermined node limit.
22. The method of claim 19, wherein the gateway increases by one or more its predetermined node limit until it is able to drop one or more nodes.
23. The method of claim 19, wherein the gateway dynamically adjusts its predetermined node limit based on network traffic conditions.
24. The method of claim 1 , wherein the gateway and the node are part of a frequency-hopping spread spectrum wireless utility network.
PCT/US2009/003714 2008-06-27 2009-06-23 Load management in wireless mesh communications networks WO2009157986A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/163,887 US8233905B2 (en) 2007-06-15 2008-06-27 Load management in wireless mesh communications networks
US12/163,887 2008-06-27

Publications (3)

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WO2009157986A2 WO2009157986A2 (en) 2009-12-30
WO2009157986A3 WO2009157986A3 (en) 2010-02-18
WO2009157986A4 true WO2009157986A4 (en) 2010-04-08

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US (2) US8233905B2 (en)
TW (1) TWI391007B (en)
WO (1) WO2009157986A2 (en)

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US8515433B2 (en) 2013-08-20
US8233905B2 (en) 2012-07-31
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