Method and apparatus for establishing intra-network calls
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United States of America Patent
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Jan 16, 2018
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app pub date -
Nov 13, 2013
filing date -
Nov 13, 2013
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Abstract
A method for establishing an intra-network call between a first subscriber, which is served by a first call control node in a visited public land mobile network, V-PLMN, and a second subscriber of a home public land mobile network, H-PLMN, which is different to the V-PLMN. The second subscriber is served by a second call control node of the same V-PLMN. The method include sending, by the first call control node, a call setup message to a gateway node in the V-PLMN which is adapted to perform re-routing of calls to another network. The gateway node requests routing information of the second call control node from a proxy location register, PLR, in the V-PLMN. The gateway node routes the call to the second call control node responsive to if routing information towards the second call control node is available from the PLR.
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