Method for determining a timeout delay in a network
View Patent ↗A method for determining a remote timeout parameter in a network comprising a link between a first bus and a third bus. The link is implemented through a first and a second bridge portal connected respectively to the first and the third bus, and is modelized as a second bus connected to the first bus and the third bus through bridges. Upon solicitation to provide its contribution to a timeout for a request subaction, the first bridge portal adds to the timeout contribution the first bridge portal's maximum request subaction processing time and either the link's maximum transmission time of half of the link's maximum transmission time, depending on the location of the destination node of the request subaction.
1. Method for facilitating data transmission over a network by determining a remote timeout parameter in a network comprising a link comprising the steps, at a level of a first bridge portal, upon solicitation to provide its timeout contribution for a request subaction, of:
(a) determining whether a destination node of the request subaction is located on the link or not, wherein the link represents a second bus that is between a first bus and a third bus, wherein the link is implemented through a first and a second bridge portal connected respectively to the first and the third bus, and wherein the link is modelized as the second bus connected to the first bus and the third bus through respective bridges;
(b) if a destination node of the request subaction is located on the link representing the second bus, adding to the timeout contribution: the first bridge portal's maximum request subaction processing time and the link's maximum transmission time, wherein the timeout represents the sum of time limits that each bridge on a route from a requesting node to a destination node is allotted to forward the request subaction, the requesting node being on the first bus, the destination node being on the link representing the second bus or on the third bus;
(c) if a destination node of the request subaction is not located on the link representing the second bus, adding to the timeout contribution: the first bridge portal's maximum request subaction processing time and half of the link's maximum transmission time; and
(d) deeming a data transmission attempt a failure if the request subaction does not occur within a time interval defined by the timeout contribution.
2. Method according to claim 1 , wherein, further to step (c), the second bridge portal adds, as its contribution, its own maximum request subaction processing time and half of the link's maximum transmission time.
3. Method according to claim 1 , wherein the link representing the second bus is a Hiperlan 2 wireless network.
4. Method according to claim 3 , wherein the maximum transmission time of the wireless link representing the second bus is equal to half of the Hiperlan 2 IEEE 1394 SSCS ‘SPLIT_TIMEOUT’ register value of a portal.
5. Method according to claim 1 , wherein the timeout contribution from the bridges is solicited through a timeout request message.
6. Method according to claim 5 , wherein, further to step (b), the first bridge portal sets remote_split_timeout fields of the timeout request message to values in accordance with the Hiperlan 2 IEEE 1394 SSCS ‘SPLIT_TIMEOUT’ register value of the first portal.
7. Method for facilitating data transmission over a network by determining a remote timeout parameter in a network comprising a link comprising the steps, at the level of a first bridge portal, upon solicitation to provide its timeout contribution for a response subaction associated with a request subaction, of:
(a) determining whether a destination node of the response subaction is located on the link or not wherein the link represents a second bus between a first bus and a third bus, wherein the link is implemented throuah a first and a second bridge portal connected respectively to the first and the third bus, and wherein the link is modelized as a second bus connected to the first bus and the third bus through respective bridges;
(b) if a destination node of the response subaction is located on the link representine the second bus, adding to the timeout contribution: the first bridge portal's maximum response subaction processing time and the link's maximum transmission time to establish the time delay for receiving a response from the destination node on the link representing the second bus, wherein the timeout represents the sum of time limits that each bridee on a route from a destination node to a requesting node is allotted to forward the response subaction, the requesting node being on the first bus, the destination node being on the link representing the second bus or on the third bus;
(c) if a destination node of the response subaction is not located on the link representing the second bus, adding to the timeout contribution: the first bridge portal's maximum response subaction processing time and half of the link's maximum transmission time, and forwarding a timeout contribution message to the second bridge portal; and
(d) deeming a data transmission atlempt a failure if the request subaction does not occur within a time interval defined by the timeout contribution.
8. Method according to claim 7 , wherein, further to step (c), the second bridge portal adds as its contribution its own maximum response subaction processing time and half of the link's maximum transmission time.
9. Method according to claim 7 , wherein the link representing the second bus is a wireless Hiperlan 2 network.
10. Method according to claim 9 , wherein the maximum transmission time of the wireless link representing the second bus is equal to half of the Hiperlan 2 IEEE 1394 SSCS ‘SPLIT 13 TIMEOUT’ register value of a portal.