ITU-T Y.1706.2-2007 远程查询用ASON线路结构和要求.学习研讨会15.pdf

标准号：ITU-T Y.1706.2-2007
中文名称：远程查询用ASON线路结构和要求.学习研讨会15
英文名称：ASON routing architecture and requirements for remote route query (Study Group 15)
发布日期：2007-02-01
标准简介：This Recommendation specifies the requirements and architecture for the functions performed by
routing controllers (RC) during the operation of remote route query. The purpose of the remote
route query is to compute one or more routing paths for a switched connection (SC) or a soft
permanent connection (SPC) within the framework of the automatically switched optical network
(ASON).
During the operation of remote route query, a RC (route query requester) sends a RI_QUERY
message to another RC (route query responder) not associated with the same set of layer resources,
and if a routing path (or more) is found after computation, the route query responder would send
back a RI_UPDATE message to the route query requester. A routing path for a SC or SPC may be
computed collaboratively by a group of RCs in this manner.
The route query interface as defined by [ITU-T G.8080] is used by routing controllers when they
communicate with each other during the remote route query operation. Note that the route query
interface is used in two different cases. First, a connection controller (CC) might request its routing
controller for a routing path, and secondly, a routing controller (RC-X) might send a request to
another routing controller (RC-Y) for a routing path, either because it (RC-X) needs to respond to a
connection controller (CC-X) or a remote routing controller (RC-A), for a route query. The second
case, i.e., the RC-to-RC communication for path computation, is the main focus of this
Recommendation.
The messages exchanged between routing controllers during the remote route query operation fall
into the same category of the routing messages as defined in [ITU-T G.7715], and they are
transported over a data communication network (DCN). This Recommendation takes a protocol
neutral approach, i.e., it does not specify any protocol solution for the communication between
routing controllers during remote route query operation.
The routing algorithm used by a route query responder during the path computation is beyond the
scope of this Recommendation.
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文件大小：399.27KB
文件页数：28


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