The patent's inventors are Carlsson, Roland (Ojersjo, SE); Mallo, Aare (
This patent was filed on
From the background information supplied by the inventors, news correspondents obtained the following quote: "Some widely used Internet services are inelastic such as VoIP (Voice over Internet Protocol), that is, data packets are generated frame-wise at a predominantly fixed frequency. Such services often require a small roundtrip time (RTT) in order to work well.
"In mobile networks (e.g. IEEE 802.16 and 3rd
"A low latency requirement for a given traffic flow, takes up a high 'transmission capacity', since the flexibility for scheduling concurrent traffic flows is diminished. For wireless systems, where channel conditions typically vary substantially over time, e.g. due to the changing location for mobile stations, a large allowable delay, i.e. the time from a packet is received from a higher order equipment until the packet is transmitted to the mobile station, is preferred.
"A VoIP service is often routed over several nodes where some nodes may use wireless transmissions. In order to ensure reasonable round trip times for e.g. VoIP services, the delay for each individual VoIP packet is typically set to a predefined maximum allowable value in each node.
"The low round trip time (RTT) requirements for VoIP services imply that transmission capacity must be dedicated for such wireless transmissions. Since a VoIP session may be routed over several nodes, each node must comply with a predefined allowable maximum latency in order to guarantee a low total RTT.
"In many prior art systems, latency requirements imply a negative toll on the total capacity of individual nodes and of the system in which the nodes are comprised."
Supplementing the background information on this patent, VerticalNews reporters also obtained the inventors' summary information for this patent: "It is a first object of the invention to increase the capacity in systems in which periodic transmissions are offered over at least a time varying channel.
"This object has been solved by providing a intermediary node (14) adapted for receiving a sequence of a packets from a server (10) and re-transmitting the sequence of packets over a time variant channel to a receiving entity (15), wherein a given predefined latency L.sub.n pertain to the intermediary node and wherein a predefined packet loss PL pertains to a sequence of packets transmitted from the server over a path of a series of arbitrary nodes ( ) to the intermediary node (14) and further on to the receiving entity (15). The intermediary node comprises a time estimator (103) adapted for performing the following steps resolving the sequence number (k) and time of arrival to the intermediary node for at least a plurality (q) of incoming packets; establishing the frame period of the incoming packets (T); establishing a sequence of normalized packet arrival times (e.sub.k) as corresponding to the sensed frame period (T); calculating the relative arrival time rt.sub.rec, k of the plurality (q) of incoming packets in relation to the normalized packet arrival times; creating a cumulative density function (CDF) for a given sequence of packets; establishing the threshold value for the relative arrival time rt.sub.PL yielding the predefined packet loss (PL) based on the cumulative density function (CDF).
Most Popular Stories
- Updates on Everglades' Stranded Pilot Whales
- Stolen Cobalt-60 Recovered in Mexico
- Hezbollah Chief's Assassination Claimed by Sunni Group
- Allstate Seeks to Invest in Minority Firms
- Sarmiento to Handle Greeley Latin Ops
- Wind Power and Wildlife Can Coexist
- First-time Jobless Claims Drop Below 300,000
- White House Pushes to Extend Unemployment Benefits
- Ford Mustang Still Packs Power
- Elizabeth Warren Ends 2016 Presidential Rumors