CONTROL SIGNAL PROCESSOR AND COMMUNICATION SYSTEM

专利名称：CONTROL SIGNAL PROCESSOR AND

COMMUNICATION SYSTEM

发明人：NAKAMURA, Shin, 701, Max

Tower,MORIKAWA, Hiroki,NAKANO,Masatomo

申请号：EP98921772.4申请日：19980522公开号：EP0941004A1公开日：19990908

专利附图：

摘要：The invention reduces an overhead operation required for re-establishment of aphysical signal link. A physical signal link (layer 1 link) is switched over keeping a layer 2link in the OSI reference model. A database 11 stores information indicating physicalsignal links and information indicating the maximum length of a layer 2 frame determinedaccording to the ability of physical signal links. When a physical signal link is to be

switched over, a target physical signal link is selected and a physical signal link used bythe link is switched to the target physical link without releasing the single layer 2 link.The maximum length corresponding to the target physical signal link is obtained fromthe database 11, and layer 2 frames having the maximum length are transmitted.Switching over a physical signal link is performed in the following manner. When aphysical signal link switching-over request is given, establishment of a target physicalsignal link is required without releasing a layer 2 link, and a multi-reception of controlsignals using both of the target physical signal link and an original physical signal link isstarted. After confirming establishment of the target physical signal link, a physical signallink used for transmitting a control signal is switched to the target physical signal linkand release of the original physical signal link is required. After confirming release of theoriginal physical signal link, a physical signal link for receiving a control signal is switchedto the target physical signal link.

申请人：NTT MOBILE COMMUNICATIONS NETWORK INC.

地址：10-1, Toranomon 2-chome Minato-ku, Tokyo 105-8436 JP

国籍：JP

代理机构：HOFFMANN - EITLE

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