Method, communication network and service access interface for communications in an open system interconnection environment
First Claim
1. A method for performing communications between cooperating open systems (OS) in an open system interconnection (OSI) communication network where a communication between at least two open systems (A, B) is performed by use of at least two hierarchically layered layer communication means (N-1, N, N+1) interconnected through a service access interface (SAP) each including a number of layer specific services and using a number of layer specific parameters for a communication between said services in the respective layer communication means, comprising the steps of:
- providing the service access interface (SAP) as a bidirectional upward service access interface (USAP); and
transferring the layer specific parameters to a next higher order layer communication means (N+1) through a respective bidirectional service access interface (SAP, USAP) between two layer communication means,wherein when the running of an application is requested from the layer communication means (N+1) of highest order in the hierarchy, each layer communication means requests from the layer communication means with the next lower order a specific portion of application data needed for supporting the running of the application in this layer communication means through a service access interface (SAP) and the next lower order layer communication means (N) in response to said request provides said specific portion of application data to the next higher layer requested from the layer communication means having requested the service through said respective access interface (SAP), andwherein said application requested from the layer communications means (N+1) of higher order and running on the basis of said specific portions of application data provided from each layer communication means (n) of lower order adapts its performance to the transferred layer specific parameters received from at least one layer communication means (N) of lower order.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention relates to a method, a communication network and a service access interface for performing communications between cooperating open systems in an open system interconnection environment. The upward service access point (USAP) is adapted to transfer layer-specific parameters, e.g. quality of service parameters to a layer of higher order. Thus, the running application can adaptively change its own performance to transmission characteristics in any one lower layer.
-
Citations
13 Claims
-
1. A method for performing communications between cooperating open systems (OS) in an open system interconnection (OSI) communication network where a communication between at least two open systems (A, B) is performed by use of at least two hierarchically layered layer communication means (N-1, N, N+1) interconnected through a service access interface (SAP) each including a number of layer specific services and using a number of layer specific parameters for a communication between said services in the respective layer communication means, comprising the steps of:
-
providing the service access interface (SAP) as a bidirectional upward service access interface (USAP); and transferring the layer specific parameters to a next higher order layer communication means (N+1) through a respective bidirectional service access interface (SAP, USAP) between two layer communication means, wherein when the running of an application is requested from the layer communication means (N+1) of highest order in the hierarchy, each layer communication means requests from the layer communication means with the next lower order a specific portion of application data needed for supporting the running of the application in this layer communication means through a service access interface (SAP) and the next lower order layer communication means (N) in response to said request provides said specific portion of application data to the next higher layer requested from the layer communication means having requested the service through said respective access interface (SAP), and wherein said application requested from the layer communications means (N+1) of higher order and running on the basis of said specific portions of application data provided from each layer communication means (n) of lower order adapts its performance to the transferred layer specific parameters received from at least one layer communication means (N) of lower order. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 12)
-
-
7. A communication network for performing communications between cooperating open systems (OS) arranged in an open system interconnection (OSI) architecture, comprising:
-
a) at least two open systems (A, B); and b) at least two hierarchically layered layer communication means (N-1, N, N+1) interconnected through a service access interface (SAP) each including a number a layer specific services and using a number of layer specific parameters for a communication between said services in the respective layer communication means;
wherein said service access interface (SAP) is a bidirectional upward service access interface (USAP) for respectively transferring said layer specific parameters to a next higher order layer communication means (N+1).wherein when the running of an application is requested from the layer communication means (N+1) of highest order in the hierarchy, each layer communication means requests from the layer communication means with the next lower order a specific portion of application data needed for supporting the running of the application in this layer communication means through a service access interface (SAP) and the next lower order layer communication means (N) in response to said request provides said specific portion of application data to the next higher layer requested from the layer communication means having requested the service through said respective access interface (SAP), and wherein said application requested from the layer communications means N+1) of higher order and running on the basis of said specific portions of application data provided from each layer communication means (n) of lower order adapts its performance to the transferred layer specific parameters received from at least one layer communication means (N) of lower order.
-
-
13. A service access interface (SAP, USAP) for interconnecting two hierarchically layered layer communication means (N-1, N, N+1) used for performing communications between at least two cooperating open systems (OS) in an open system interconnection (OSI) communication network, each layer communication means including a number a layer specific services and using a number of layer specific parameters for a communication between said services in a respective layer communication means;
- said service access interface (SAP) comprising;
transfer means for requesting/using a service from a layer communication means of lower order and providing said service to a layer communication means of a higher order, wherein said transfer means further provides to the layer communication means of higher order the layer specific parameters of the layer communication means of lower order, wherein when the running of an application is requested from the layer communication means (N+1) of highest order in the hierarchy, each layer communication means requests from the layer communication means with the next lower order a specific portion of application data needed for supporting the running of the application in this layer communication means through a service access interface (SAP) and the next lower order layer communication means (N) in response to said request provides said specific portion of application data to the next higher layer requested from the layer communication means having requested the service through said respective access interface (SAP), and wherein said application requested from the layer communications means (N+1) of higher order and running on the basis of said specific portions of application data provided from each layer communication means (n) of lower order adapts its performance to the transferred layer specific parameters received from at least one layer communication means (N) of lower order.
- said service access interface (SAP) comprising;
Specification