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

ASON routing architecture and requirements for remote route query Study Group 15

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标准号

ITU-T Y.1706.2-2007

发布日期

2007年02月01日

实施日期

废止日期

无

中国标准分类号

M10

发布单位

IX-ITU

引用标准

ITU-T G.7712/Y.1703-2003 ITU-T G.7713/Y.1704-2006 ITU-T G.7713.1/Y.1704.1-2003 ITU-T G.7713.2/Y.1704.2-2003 ITU-T G.7713.3/Y.1704.3-2003 ITU-T G.7715/Y.1706-2002 ITU-T G.7715.1/Y.1706.1-2004 ITU-T G.8080/Y.1304-2006 ITU-T G.8081/Y.1353-2004

适用范围

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.