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| OF THE INVENTION FIG. 1 shows a schematic/block diagram of an embodiment of an automated unmanned ... |
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| Method, apparatus and system for directing access to content on a computer network |
| OF PREFERRED EMBODIMENTS Preferred embodiments of the instant invention employ a network of ... |
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| Flexible computer resource manager |
| The subject invention improves upon existing resource management techniques by providing an ... |
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| Dynamic modification of multimedia content |
| FIG. 1 depicts an example of an Internet environment having features of the present invention. As ... |
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| Networked appliance for recording, storing and serving digital images |
| An improved image server is provided by virtue of the present invention. In one embodiment of an ... |
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| System and method for processing a request for information in a network |
| From the foregoing, it may be appreciated by those skilled in the art that a need has arisen for a ... |
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| Secure postage meter in an ATM application |
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Dynamic radio link adaptation
| Details |
Inventors: Gage, William Anthony; Janevski, Goran; Sonti, Jagdish; Coskun, Risvan; Kenward, Gary;
Assignee: Nortel Networks Limited. (St. Laurent, CA)
Primary Examiner: Vincent; David
Assistant Examiner:
Attorney, Agent or Firm:
A radio link adapter for wireless transmission of multimedia data through a communication link between a radio access network (RAN) and a mobile station (MS), is provided. The information flow is constantly monitored to determine an information element (IE) type of service requirements and for allocating paired radio link adapters (RLAs) designed to fit the respective type of service requirements. A connection end may be initially established in the RAN or in the MS. An analyser monitors the link, detects the type of service (ToS) required, and dynamically allocates the appropriate type of RLA to the connection. There is no need to recreate the connection when selecting the adapter for transporting various types of services and therefore, the transport of the information flow of a specific ToS over the communication link is optimized, while maintaining the end-to-end quality of service (QoS). |
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DETAILED DESCRIPTION OF THE EMBODIMENTS FIGS.
1-a to 1-c show the OSI model and its application to this invention.
FIG.
1-a show the OSI layers in general, and FIG.
1-b show the OSI layer affected by the link protocol.
As shown in FIG.
1-b, a link protocol typically only operates at Layer 2 the link layer, of the protocol stack.
The link protocol provides a fixed set of services to Layer 3 the Network Layer, and has no knowledge of the protocols used outside Layer 2.
The present invention provides a method and apparatus for improving the quality of service (QoS) for multimedia communications over a radio link, while giving priority to correctly delivering acknowledgments for information already received.
According to the invention, a radio link adapter (RLA) is designed to provide services that closely match the type of service (ToS) requirements and that can be dynamically selected to transport information without having to recreate a connection.
A link adapter may operate at any and all levels of the protocol stack used between the sender and the receiver.
In practical terms, this means that the link adapter of the invention extracts information from anywhere in the communications environment and manipulates any of the protocols used between the sender and the receiver, as shown in FIG.
1-c.
The radio link adapter concept falls into a general class of protocol enhancement techniques known as "protocol boosters" that are designed to provide improved end-to-end protocol performance without changing the semantics of the end-to-end protocol.
Thus, while the effects of the RLA protocol booster may be apparent to the communicating end points, e.
g.
improved throughput, the mechanisms and protocols used internally by this RLA protocol booster are transparent to the end points.
The "boosters" known in the art so far are static boosters.
Dynamic selection of an RLA allows the wireless system to determine the service requirements of an information flow and to quickly change the way that service is provided, as the needs of the flow change and as the conditions on the radio link change
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Finance 
