摘要:
The invention relates to a new type of quality of service architecture for a network assembly and a corresponding computer network system. The Internet technology as approved by the IETF organization has defined different services. One is the integrated services (IntServ) and the other the differentiated services (DiffServ) architecture. Another is the RSVP Protocol according to which Quality of Service can be implemented with accuracy and richer functionality.The invention shows a way how less sophisticated QoS managers inside the network with only DiffServ or Intserv capability, can be used for enhancing the QoS functionality based on so-called RSVP shadowing messages, and easy to implement RSVP shadowing stacks.
摘要:
The invention relates to a method for managing network resources in a network with a network management device (M), a network component (A), and a further network component (B), and a network management device (M), the method comprising the following steps: transmitting a request for an advance reservation of a network resource by the network component (A) to the network management device (M), wherein the request includes information regarding a reservation start time and a reservation end time; transmitting a request for an ad-hoc reservation of a further network resource by the further network component (B) to the network management device (M); allocating the further network resource to the further network component (B) by the network management device (M); and allocating the network resource to the network component (A) by the network management device (M) at the reservation start time, wherein the network resource comprises a part or all of the further network resource.
摘要:
The invention relates to a network subscriber station and to a method for operating a network subscriber station for a network of distributed stations, particularly a network of IEEE 1394 network subscriber stations, which are connected by means of a data bus. The network subscriber station comprises at least three memory areas for operation-dependent interface configuration data and pointer means, which comprise electronic pointers to the at least three memory areas, and driver means for handling electronic data in the at least three memory areas and for electronic data transfer between the at least three memory areas.
摘要:
In order to request station-specific information in a network of distributed stations, it is proposed that a block read access operation (30) first be used to request the desired information. Should the requested network station react with an error code, the corresponding network subscriber station is not immediately removed from the “node information” table for the network. Instead, the station-specific information is then rerequested, but this time using word access operations (34). This measure allows network subscriber stations to be integrated into the “node information” table which support only word read access operations, but return unclear error codes, which are not fully compliant with the standard, in the event of block read access operations.
摘要:
In the method for management of data transmissions in a network, switching means are provided, by means of which a change can be carried out between a first data transmission type and a second data transmission type, as alternative data transmission types between a transmitter and a receiver. The change is carried out on the basis of at least one respectively predetermined criterion. The first data transmission type corresponds to a transport protocol based on rate-based overload control. The second data transmission type corresponds to a transport protocol based on RTT-based overload control.
摘要:
The invention relates to a method for managing network resources in a network with a network management device (M), a network component (A), and a further network component (B), and a network management device (M), the method comprising the following steps: transmitting a request for an advance reservation of a network resource by the network component (A) to the network management device (M), wherein the request includes information regarding a reservation start time and a reservation end time; transmitting a request for an ad-hoc reservation of a further network resource by the further network component (B) to the network management device (M); allocating the further network resource to the further network component (B) by the network management device (M); and allocating the network resource to the network component (A) by the network management device (M) at the reservation start time, wherein the network resource comprises a part or all of the further network resource.
摘要:
The invention relates to a method for synchronizing a clock of a network component with a clock of a further network component communicatively connected to the network component in a network and a network component, whereby the method comprises the following steps: determining a set of forward transition delays for transmission of messages from the network component to the further network component and a set of corresponding backward transition delays for transmission of messages from the further network component to the network component, selecting a minimum forward transition delay from the set of forward transition delays, selecting a minimum backward transition delay from the set of backward transition delays, deriving an estimated value for an offset between the clock of the network component and the clock of the further network component from the selected minimum forward transition delay and minimum backward transition delay, and adjusting the clock of the network component in accordance with the estimated value for the offset estimate.
摘要:
The invention relates to a network subscriber station and to a method for operating a network subscriber station for a network of distributed stations, particularly a network of IEEE 1394 network subscriber stations, which are connected by means of a data bus. The network subscriber station comprises at least three memory areas for operation-dependent interface configuration data and pointer means, which comprise electronic pointers to the at least three memory areas, and driver means for handling electronic data in the at least three memory areas and for electronic data transfer between the at least three memory areas.
摘要:
When updating a data record identified by a version number, the problem exists that a simple not equal to comparison or greater than comparison is often insufficient for ascertaining the up-to-date nature of the newly received data record, particularly if the data record is transmitted to a receiving station via an unsecured data link and the version number originates from a limited range which is repeatedly run through periodically. The invention solves the problem by virtue of the fact that it divides the range of values of the version number into the ranges “old” and “new”, on the basis of the current value of a version number. The periodicity with which the range of values is run through is taken into account in this case, however. That is to say that the range “old” or the range “new” may perfectly well include the jump from the highest value in the range of values to the lowest value in the range of values. If the version number of the newly received data record lies in the range “new”, the new data record is accepted as a current data record, and if not it is correspondingly rejected.
摘要:
Modern computers (10, 20) come with different timers having different attributes like time resolution, supported time range and time reference. Some are local timers, representing relative time values like the TSC counter (11, 21) counting CPU cycles from the power on or reset of the computer. Some are global timers, representing an absolute or real time. Having different classes of timers in the computer (10, 20), a number of computations need to be performed to tie the different timers to each other.It is the idea of the invention to define a single high resolution timer structure wherein the time value is represented with a digital number and a flag clarifies whether the timer is a global timer or local timer. The invention enables a much faster processing of the time values. The global time, tied to a high-resolution timer can be tracked much faster. This means better precision of scheduling of time critical jobs, like packet scheduling for data transport.