Nortel Networks Corporation

Apple Inc.

Rockstar Consortium US LP

Blackberry Corporation

Hongyi Li

Sophie Vrzic

Tricci So

Shalini Suresh Periyalwar

Ahmed Reza

Kent Felske

Peter Ashwood Smith

Kelvin Kar-Kin Au

Peter Hazy

Kelvin Au

Nimal Gamini Senarath

Syed Kamran Raza

Koon Hoo Teo

Goran Janevski

Donna D Xu

Paul Coverdale

Gerard R Pieris

Goran G Janevski

A system and method for adaptively managing frame size in a wireless multihop network is disclosed. In one embodiment, a packet is transmitted from a source to a destination. A acknowledgement packet is received and a successful acknowledgement packet counter is incremented if the acknowledgement packet arrives prior to a time-out of a timer. A frame size is increased if the successful acknowledgement packet counter reaches a specified value. If the acknowledgement packet arrives after the time-out of the timer, the successful acknowledgement packet counter is reset and the frame size is decreased. These procedures can be repeated until the frame size is greater than or equal to a maximum frame size or less than or equal to a minimum frame size.

System and method for adaptive frame size management in a wireless multihop network

A method of determining whether to set up a delay-sensitive communication session over an internet protocol (IP) based network includes sharing link state information among the network nodes of the link state protocol controlled network, receiving an IP packet that conveys a request to set up a delay-sensitive communication session over the network; determining, based on the shared link state information, a shortest path through the link state protocol controlled network for the requested delay-sensitive communication session and whether the shortest path is deemed suitable for the delay-sensitive communication session, and setting up the delay-sensitive communication session over the shortest path only when the shortest path is deemed suitable for the delay-sensitive communication session.

Tandem call admission control by proxy for use with Non-Hop-By-Hop VoIP signaling protocols

A method and system for packet scheduling are provided. The method includes: the step of receiving an incoming packet; extracting packet identification information associated with the incoming packet, and assessing a delay budget for the incoming packet in dependence upon its arrival time and the associated information. The system includes: an input module for receiving an incoming packet, and extracting information associated with the incoming packet, and a module for assessing a delay budget for the incoming packet in dependence upon its arrival time and the associated information.

Method and system for packet scheduling

The invention provides new call admission control methods for application in wireless networks such as wireless mesh networks. A separate set of call admission control constraints is applied to access links used to access the network and transit links between network nodes of the network. Both sets of constraints must be satisfied for a call to be accepted.

Call admission control systems and methods for wireless networks

Described are a method and system for determining whether to establish a call over an internet protocol (IP)-based network. A network device inspects an IP packet to determine that the IP packet conveys a message to initiate a call. The network device determines a shortest path through a link-state network to be taken by traffic associated with the call if the call is admitted. The network device also determines whether each link in the shortest path through the link-state network is available for supporting the traffic associated with the call and issues a message that rejects admission of the call if at least one link in the shortest path through the link-state network is unavailable for supporting the traffic associated with the call.

Tandem call admission control by proxy for use with non-hop-by-hop VoIP signaling protocols

A system and method for adaptively managing frame size in a wireless multihop network () is disclosed. In one embodiment, a packet is transmitted from a source to a destination (). A acknowledgement packet () is received and a successful acknowledgement packet counter is incremented if the acknowledgement packet arrives prior to a time-out of a timer (). A frame size is increased if the successful acknowledgement packet counter reaches a specified value (). If the acknowledgement packet arrives after the time-out of the timer, the successful acknowledgement packet counter () is reset and the frame size () is decreased. These procedures can be repeated until the frame size is greater than or equal to a maximum frame size () or less than or equal to a minimum frame size ().

The invention provides various schemes for negotiating communications between wireless mesh network nodes operating in accordance with the IEEE 802.11e standard. However, more generally, the invention can be operated in accordance with other communication standards. According to a broad embodiment of the invention, a method is provided in which meeting durations are divided into at least two portions, an uplink transmission portion and a downlink transmission portion. In order to protect the negotiation packets from collisions, the negotiation process is combined with the uplink and downlink data transmissions. In some aspects of the invention, the negotiation process is protected from collisions by using the transmission opportunity (TXOP) protocol that is available in the IEEE 802.11e standard. The inventive methods can be used with a contention based protocol or a contention free based protocol. According to another broad embodiment of the invention there is provided a wireless network node capable of implementing methods described for negotiating communications between neighbouring nodes.

Systems and methods for wireless network negotiation

The invention provides a novel protocol suite for supporting micro-mobility within a radio access network (RAN). The protocol suite and comprises three separate protocols, namely a Mobile Registration Protocol, a Handoff Affected Router Discovery Protocol (HARDP) and a Mobile Location Update Protocol. The Mobile Registration Protocol is used to register mobile terminals within a RAN while the Mobile Location Update Protocol is used to update mobile terminal reachability during a handoff. The HARDP protocol is used at network boot-up time to identify a subset of routers that needs to be updated when a mobile terminal handoff occurs between two neighboring radio access nodes.

Methods and apparatus for supporting micro-mobility within a radio access network

An object-based framework for a wireless access network is provided. Several applications of the proposed framework to enable multicasting and RSVP in the wireless access network are also provided. The object-based framework solves the problem of micro-mobility, in which a mobile host can maintain active TCP sessions during handoff. The location transparency and object serialization functions of distributed object technology are used to solve IP mobility issues. A network node adapted to forward a data packet, such as an IP packet, to a mobile host connected to a radio node by performing a remote method invocation with the data packet as an argument

Methods and systems implementing mobility support in a packet-based wireless access network

A method and apparatus for bi-directional transfer of information between a corresponding host and a mobile host in a communications network where each user is assigned a unique network address. In accordance with the teaching of the invention, mobility M- and N-proxies are provided for intercepting data incoming from the mobile host and redirecting it to the corresponding host via transitional transmission sessions established by the proxies, such that the migration of the mobile host from one coverage area to another is transparent to the network application running on the mobile host.

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Ottawa, Canada

Hongyi Li